This guide walks through the options available to inject optional
dependencies with
Spring DI.
Introduction
There are quite a few use-cases where it’s needed to make optional some of the dependencies injected, here are some of them:
- Provide a default implementation whenever a required infrastructure dependency is not provided, such as
DataSource
s. - Prevent the usage of dependencies such as monitoring strategies depending on the
environment
. - If you are building your own spring-boot auto-configuration component, sometimes it’s necessary to have optional dependencies.
@Autowired
The most know approach to achieve the optional
injection is simply to use the @Autowired(required = false)
,
something like this:
@Autowired(required = false)
private HelloService helloService;
It works fine and gets us to where we wanted, however, I don’t recommend anyone to use field injection and one
of the reasons for that is the test
layer of the application. Whenever field injection is used it’s mandatory
to use reflection
to inject a different implementation based on the test case
.
Java 8 Optional type
You may be familiar with Java 8’s Optional
type, it can also be used while injecting dependencies with Spring,
here a sample:
@RestController
public class HelloController {
private Optional<HelloService> optionalHelloService;
public HelloController(Optional<HelloService> helloService) {
this.optionalHelloService = helloService;
}
@GetMapping("/hello")
public String hello() {
return optionalHelloService.map(HelloService::hello)
.orElse("Hello there, fallback!");
}
}
The implementation above gives you an Optional
monad where you can validate whether the implementation is present
before using it.
Spring’s ObjectProvider
Since Spring 4.3 there’s this class named ObjectProvider designed specifically for injection points.
From the javadocs:
A variant of
ObjectFactory
designed specifically for injection points, allowing for programmatic optionality and lenient not-unique handling.
Using the same example from above:
@RestController
public class HelloController {
private HelloService helloService;
public HelloController(ObjectProvider<HelloService> helloServiceProvider) {
this.helloService = helloServiceProvider.getIfAvailable(DefaultHelloService::new);
}
@GetMapping("/hello")
public String hello() {
return helloService.hello();
}
class DefaultHelloService implements HelloService {
@Override
public String hello() {
return "Hello there, fallback!";
}
}
}
In this example, it’s not only optional but also it provides a default implementation as a fallback.
Summary
Congratulations! You just learned few ways to optionally inject dependencies within Spring apps.
Footnote
- The code used for this tutorial can be found on GitHub
- More about IoC and DI


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Blue Velvet
Written and Directed by David Lynch (Eraserhead)
Starring: Kyle MacLachlan as Jeffrey Beaumont Dennis Hopper as Frank Booth Laura Dern as Sandy Williams Isabella Rossellinni as Dorothy Vallens
As Reviewed by James Brundage
Most of the people who follow Lynch, his devoted cult of watchers, got hooked with the two season "Twin Peaks" television series. For them, the line "She's dead... wrapped in plastic" will always have a special place in their heart. The newer generation of Lynch watchers were witness to Wild at Heart and Lost Highway. The older generation, his mainstream watchers, probably saw The Elephant Man and Dune. His very first devotees: Eraserhead and Stick Figures Getting Sick.
Although Lost Highway was my first exposure to the director, it was not what made me fall in love with him. What made me love the director, love his talent for storytelling, his dark humor and quiet essayistic nature, was his 1986 independent smash Blue Velvet.
Blue Velvet was described to me by an avid Lynch fan that works at Bristol-Myers Squibb in New Jersey as "about as weird as they get." Being a student of the strange, that piqued my interest.
It opens up with a picturesque small town, then shows a man having a stroke. His son, Jeffery Beaumont (MacLachlan) comes home from college in order to comfort his mother and aunt. What he finds instead is the most primal thing that we all love: a mystery.
This mystery comes while walking in a field. He sees a wine bottle near a shack, begins throwing rocks at it, and bends down to pick another rock up only to find a human ear.
He informs the police, who really can't do much in the way of investigating. On his way out of the house of the detective working on the case, a woman walks out of the darkness and asks: "Are you the one that found the ear?"
This is Sandy Williams (Dern), the detective's daughter, who becomes equally enraptured in the mystery. She informs him that she listens in on conversations that her father has had, and that the name Dorothy Vallens (Rossellini) has come up a number of times.
Together, the two set it upon themselves to unravel the mystery behind the ear. Along the way Jeffrey is drawn into a dark and violent world, filled with machocistic women and sadistic killers (Dennis Hopper showing his true acting prowess). At the same time Jeffrey finds himself torn between two women: a completely erotic relationship with Dorothy Vallens and an increasingly strong love for Sandy Williams.
Blue Velvet is out there in both style and substance. As a mystery, it excels the art form, throws out the templates and draws brand new ones. Every modern cinema mystery of quality I have found has had some traces of this film in it. As a raw story, it comes off as completely surreal. Although you have a gritty realism to the story itself, Lynch succeeds in shocking the unshockable: the entire film seems like a terribly realistic nightmare.
As far as style is concerned, the entire film is done in a very subversive directorial style. Lynch over-lights his days for an industrial look, an America so superficially beautiful it begins to get on your nerves. At night, he employs classic noir techniques: little to no lighting to make the film terrifying. He also films violence in slow-motion in order to make it seem stranger, uses classic symbolism and makes fun of it at the same time. Also, from a sound aspect, whenever something truly climatic happens, instead of a false note of music, the film's volume increases and a droning sound comes on, adding to the sense that this is all a dream and that, more than anything, you want to wake up.
The story is best expressed as a brilliant satire of small-town life, which Lynch has a tendency to be fascinated with (i.e. Twin Peaks). The two storylines -- one of the mystery and one of the romance between Jeffery and Sandy -- intertwine like snakes and both contain a dark, off-kilter humor. At one point, as Jeffery is going to sneak into Dorothy's apartment at night to search it, Sandy remarks to him: "I don't know whether you're a detective or a pervert." Jeffery smiles and responds: "That's for me to know and you to find out."
The surreal nature also inserts itself into the suspense. Perhaps the oddest scene in the film comes as Frank Booth beats up Jeffery to the tune of "Candy-Colored Sandman."  The look, reader, is one of pure evil.
The only flaw in the film that I have been able to discern with about a dozen viewings is that of the archetypes that are employed, which is only a personal opinion seeing as the characters were designed to be that way.
All fans of mysteries and independent films should see this one. If you're a Lynch fan and have missed it, make sure you check it out. If you're not a Lynch fan, watch it and you will become one.
The review above was posted to the
rec.arts.movies.reviews newsgroup (de.rec.film.kritiken for German reviews).
The Internet Movie Database accepts no responsibility for the contents of the
review and has no editorial control. Unless stated otherwise, the copyright
belongs to the author.
Please direct comments/criticisms of the review to relevant newsgroups.
Broken URLs inthe reviews are the responsibility of the author.
The formatting of the review is likely to differ from the original due
to ASCII to HTML conversion.
Related links: index of all rec.arts.movies.reviews reviews


License¶
Distributed under the terms of the MIT license
MIT License
Copyright (c) 2017 WenyiXu
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
 IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.


ASP.NET Boilerplate provides an abstraction for caching. It internally uses this cache abstraction. While default implementation uses MemoryCache, it can be implemented and changable for any other caching provider.
Main interface for caching is ICacheManager. We can inject it and use it to get a cache. Example:
public class TestAppService : ApplicationService
{
private readonly ICacheManager _cacheManager;
public TestAppService(ICacheManager cacheManager)
{
_cacheManager = cacheManager;
}
public Item GetItem(int id)
{
//Try to get from cache
return _cacheManager
.GetCache("MyCache")
.Get(id.ToString(), () => GetFromDatabase(id)) as Item;
}
public Item GetFromDatabase(int id)
{
//... retrieve item from database
}
}
In this sample, we're injecting ICacheManager and getting a cache named MyCache.
Do not use GetCache method in your constructor. This may dispose the Cache if your class is transient.
ICacheManager.GetCache method returns an ICache. A cache is singleton (per cache name). It is created first time it's requested, then returns always the same cache object. So, we can share same cache with same name in different classes (clients).
In the sample code, we see simple usage of ICache.Get method. It has two arguments:
ICache interface also has methods like GetOrDefault, Set, Remove and Clear. There are also async versions of all methods.
ICache interface works string as key and object as value. ITypedCache is a wrapper to ICache to provide type safe, generic cache. To convert ICache to ITypedCache, we can use AsTyped extension method as shown below:
ITypedCache<int, Item> myCache = _cacheManager.GetCache("MyCache").AsTyped<int, Item>();
Then we can use Get method without converting and casting code.
Default cache expire time is 60 minutes. It's sliding. So, if you don't use an item in the cache for 60 minutes, it's automatically removed from the cache. You can configure it for all caches or for a specific cache.
//Configuration for all caches Configuration.Caching.ConfigureAll(cache => { cache.DefaultSlidingExpireTime = TimeSpan.FromHours(2); }); //Configuration for a specific cache Configuration.Caching.Configure("MyCache", cache => { cache.DefaultSlidingExpireTime = TimeSpan.FromHours(8); });
This code should be placed PreInitialize method of your module. With such a code, MyCache will have 8 hours expire time while all other caches will have 2 hours.
Your configuration action is called once cache is first created (on first request). Configuration is not restricted to DefaultSlidingExpireTime only, since cache object is an ICache, you can use it's properties and methods freely configure and initialize it.


Smoothing splines with penalties on order m derivatives.
| Version: | 1.0-18 |
| Depends: | R (≥ 2.0.0), stats, graphics |
| Published: | 2017-06-12 |
| Author: | S original by Jim Ramsey. R port by Brian Ripley. |
| Maintainer: | Brian Ripley <ripley at stats.ox.ac.uk> |
| License: | Unlimited |
| NeedsCompilation: | yes |
| Materials: | ChangeLog |
| CRAN checks: | pspline results |
| Reference manual: | pspline.pdf |
| Package source: | pspline_1.0-18.tar.gz |
| Windows binaries: | r-devel: pspline_1.0-18.zip, r-release: pspline_1.0-18.zip, r-oldrel: pspline_1.0-18.zip |
| OS X binaries: | r-release: pspline_1.0-18.tgz, r-oldrel: pspline_1.0-18.tgz |
| Old sources: | pspline archive |
| Reverse depends: | dendrometeR, shinyKGode |
| Reverse imports: | copula, FCGR, GenWin, KGode, optiSel, phtt, RPANDA |
| Reverse suggests: | cycleRtools, taRifx |
Please use the canonical form https://CRAN.R-project.org/package=pspline to link to this page.


 We want You to be in the best position to not only obtain the body you deserve, But also develop a Foundation so you can sustain Your New Life after our Coaching. For a FREE Consultation enter your Email Below.
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She gave me the Queen
She gave me the King
She was wheelin’ and dealin’
Just doin’ her thing
She was holdin’ a pair
But I had to try
Her Deuce was wild
But my Ace was high
But how was I to know
That she’d been dealt with before
Said she’d never had a Full House
But I should have known
From the tattoo on her left leg
And the garter on her right
She’d have the card to bring me down
If she played it right
She’s got the Jack
She’s got the Jack
She’s got the Jack…
Poker face was her name
Poker face was her nature
Poker straight was her game
If she knew she could get you
She play’d ‘em fast
She play’d ‘em hard
She could close her eyes
And feel every card
But how was I to know
That she’d been shuffled before
Said she’d never had a Royal Flush
But I should have known
That all the cards were comin’
From the bottom of the pack
And if I’d known what she was dealin’ out
I’d have dealt it back
She’s got the Jack
She’s got the Jack
She’s got the Jack…


title = "Page not found (404)" url = "/404" layout = "static" is_hidden = 0 robot_index = "index" robot_follow = "follow" ==
Page not found


Information kindly provided by the OMBD API
You searched for ___________. Here are the results.
Some example text. Some example text.


Home
Mathamaticians
Documents
Videos
About us
INTRODUCTION
Here you can download all the resourses from V to VIII which are available with Thanthric Maths. Hope you Enjoy 😊
TEXTBOOK
Click Here
QUESTION POOL
Click Here
NOTES
Click Here
Follow Us On
COPYRIGHT 2019
ARUN SREENIVAS - All Rights Reserved


Simple DepthCloud Example
Run the following commands in the terminal then refresh the page
- roscore
- roslaunch rosbridge_server rosbridge_websocket.launch
- rosrun tf2_web_republisher tf2_web_republisher
- roslaunch openni_launch openni.launch depth_registration:=true
- rosrun web_video_server web_video_server _port:=9999
- rosrun depthcloud_encoder depthcloud_encoder_node _depth:=/camera/depth_registered/image_float _rgb:=/camera/rgb/image_rect_color
- rosrun nodelet nodelet standalone depth_image_proc/convert_metric image_raw:=/camera/depth_registered/image_raw image:=/camera/depth_registered/image_float


The perfect way to shop while riding local transit
Here you will be shown a total of three images, click the image with the product you would most likely buy. You will do this a total of 25 times and at the end click the button and your results will be shown.


What it takes to create a blog using JekLog?
Login using GitHub
Login to our app using GitHub. This will be used to create repositories that will be used as the store house of the code.
I have a GH account Create newCreate a Repository
Create a repository using our app. This repository will be used to keep the content on the website using GitHub.
Create the repositoryStart Publishing
Now start writing your posts and the posts will be directly visible on your newly created blog. Share it with your friends.
Publish your first postFound an Issue?
Found an Issue or Unable to find how to make it work. Feel free to report it using GitHub issues and help us provide better services. Hit the button below and reach the issues list of the JekLog project. Please search the issue list before opening a new issue to see if the issue is already reported.
Is there something that you want us to add! No worries. Just create a feature request.
About us @ JekLog
Jeklog: Jekyll static-site on GitHub Pages
Our aim is to provide a seamless service so that you guys can get a static-site generated in less than 2 minutes.
For this you just need to do three things:
Login using GitHub.
Create your repository( blog name).
Enter your site data.
This is all you need to do. Finally, you will go home with a beautiful and fast static site. That will serve your purpose.
Anytime you will want to post some content on your website. Come back, login to your account and start posting.
No need to take extra lessons to write markdown. Which is one of the greatest hassle for a user on creating a blog on Jekyll.
Check the sample
Ranvir Singh (Founder)
A web developer from India. A coding and Linux enthusiast who wants to learn as many things as possible. A FOSS lover and an open source contributor. He has also participated in Google Summer of Code 2017 with AboutCode organisation. You can find his blog at http://blog.ranvirsingh.me.
In his free time, you can find him reading his favourite fiction or playing football( Soccer as they call it in US).
Technologies we use to create Jekyll blog on JekLog
Jekyll
A static site generator for GitHub pages which is used to create blogs using this app.
Django
Python web development framework and our web app is developed using this platform.
GitHub pages
GitHub to host the content of the website and Pages will deliver the content on demand.
Creative tim theme
Thank you, for providing the key thing for the development of this web app Free theme.
Digital Ocean
We are hosting our files online using leading server space provider digitalocean.


Instructions
This test is meant to observe the impact of <link rel=prefetch fetchpriority=high>
.
It needs to be run on a remote HTTP/2 server with a device on 3G/4G/ADSL.
An image file named “image.bmp” must be present in the same directory. A 2 MB file can be generated with ImageMagick like so: convert -size 820x820 canvas:crimson image.bmp


November 24 St Andrew Dung-Lac, Priest, and Companions, Martyrs
FIRST READING 1 Corinthians 1:17-25
For Christ did not send me to baptise but to preach the gospel, and
not with eloquent wisdom, lest the cross of Christ be emptied of its
power. For the word of the cross is folly to those who are perishing,
but to us who are being saved it is the power of God. For it is
written, “I will destroy the wisdom of the wise, and the cleverness
of the clever I will thwart.”Where is the wise man? Where is the
scribe? Where is the debater of this age? Has not God made foolish
the wisdom of the world? For since, in the wisdom of God, the
world did not know God through wisdom, it pleased God through
the folly of what we preach to save those who believe.
For Jewsdemand signs and Greeks seek wisdom,
but we preach Christ crucified, a stumbling block to Jews and folly to Gentiles, but to those
who are called, both Jews and Greeks, Christ the power of God
and the wisdom of God. For the foolishness of God is wiser than
men, and the weakness of God is stronger than men.
The word of the Lord.
RESPONSORIAL PSALM Psalm 124
R. Our life, like a bird, has escaped from the snare of the fowler
“If the Lord had not been on our side
when men rose against us, then would they have swallowed us alive
when their anger was kindled.”
R. Our life, like a bird, has escaped from the snare of the fowler
“Then would the waters have engulfed us,
the torrent gone over us; over our head would have swept the raging waters.”
R. Our life, like a bird, has escaped from the snare of the fowler
Indeed, the snare has been broken,
and we have escaped. Our help is in the name of the Lord, who made heaven and earth
R. Our life, like a bird, has escaped from the snare of the fowler
GOSPEL ACCLAMATION 1 Peter 4:14
R. Alleluia. If you are reproached for the name of Christ, you are blessed, because the Spirit of God rests upon you.R. Alleluia.
 Are not two sparrows sold for a penny?
And not one of them will fall to the ground without your Father’s
will.  Fear not,
therefore; you are of more value than many sparrows. So every
one who acknowledges me before men, I also will acknowledge
before my Father who is in heaven; but whoever denies me before
men, I also will deny before my Father who is in heaven.”"
The Gospel of the Lord.


{include file="public/header" /}
{include file="public/menu" /} {__CONTENT__}
{include file="public/footer" /}


Still Need Help with Connector?
No problem. The ShareConnect team is here to help. Click on the button below to sign up for a 1-1 with a care team member who can help you get your account set up.
Thank you for your interest in Connector. A care member will be in touch soon.


Welcome to the new home of I Like Pretty Clothes! I have been a happy resident of Tumblr for four and a half years, and more recently took up a second home in Instagram. But I have toyed with the idea of starting a long form blog for nearly as long as I've been taking photos of myself and sticking them on the internet, so I figured, why not do it for a course assignment and kill two birds with one stone?
Just a little background: I've decided to make a pretty major career change, from marketing for a professional theatre to learning to programme for .. well, hopefully someone will hire me when I'm well-versed in Ruby on Rails, HTML, CSS, JavaScript and all of that fun stuff. I'm taking a course to learn this new set of skills in a really short period of time. Scary, hey?
But even though I am learning all of this cool new stuff to become a full-fledged tech geek, don't worry - ILPC will still remain 100% devoted to my first and biggest love, pretty clothes. Ok, 99%, with some geek stuff on the side. Well, ok, 96%, because there will likely be some nerdy, tattooy and feministy stuff in there, too. Oh, and bunnies ... and I can't forget travel! And food ... definitely food. Yummmmmmmmm, food.
Whatever, it will still be mostly clothes, alright?


Minecraft is a sandbox video game developed by Mojang. The game was created by Markus "Notch" Persson in the Java programming language. Currently, Minecraft is owned by Mojang, Which is owned by Microsoft.


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Several additional lessons can be learned from this calibration exercise:
An error in the final calibration arises from the precision of the sensor. The calibration points were generated from a known polynomial, and the differences between the result of calibration and that assumed polynomial have standard deviation 0.1205 and so will introduce an error of this magnitude when the calibration is used. Furthermore, although this error arises from random errors in the calibration, they become systematic errors when that calibration is used and cannot be reduced by repeated measurements. This is an important motivation for getting the calibration to have minimal error.
Did you interpolate between calibration points to estimate the value of x corresponding to M = 55, to get 11.62? That’s a good approach when the random error in the calibration measurement is small. However, in a case such as this where there is an underlying smooth function that is distorted by random error in the calibration points, fitting to a smooth curve gives a much better answer than would be obtained by simple linear interpolation between the calibration points. To see how large this advantage is, random measurands were selected in the range of this calibration and the error evaluated for each measurement as if using the above quadratic-polynomial calibration or using interpolation among the measurements. The standard deviation in the first case was 0.1016 and that in the second (using interpolation) was 0.2404, showing that the result from fitting to a quadratic polynomial gives much better results. The fit smooths the errors that arise from the precision of the sensor.
For this reason, it is very useful to make repeated independent measurements at each calibration point. If 100 such measurements are averaged for each value of the measurand used in the calibration, the random error in the value of the measurement at each point is reduced by approximately a factor of 10. In this case, that reduces the standard deviation between the calibration curve and the assumed-correct values to 0.1166. That’s a surprisingly minor improvement over the fit determined from the original unaveraged data, which gave a corresponding standard deviation of 0.1205. The fit doesn’t improve because the true calibration is higher power than quadratic, although this was obscured by the large random error before averaging measurements. More precise calibration data now reveals this higher-order dependence. If a third-order fit is used with the averaged calibration data, the standard deviation is reduced to 0.0291, and a fourth-order polynomial reduces the same standard deviation to 0.014, with significance tests indicating that all coefficients are needed. The reason is that this example was generated using the following equation: M = a1 + a2x + a3x2 but, when fitted as a function x(M) fourth-order terms are needed to represent this dependence. The result is that averaging 100 measurements per calibration value and using a high-order fit leads to negligible residual error and so to negligible systematic error when the calibration is used.
When using higher-order fits like this, there is considerable danger if the resulting calibration is extrapolated beyond the range covered by the original calibration. Figure 4 below shows the fourth-order calibration, as the red line, and the underlying transfer curve (blue line) from which the small-precision measurements, also shown, were generated. The calibration represents the measurements very well, but when extrapolated beyond its range of validity it can create serious errors. This is always a danger when high-order functions are used to represent calibrations.
Figure 4: The fourth-order calibration curve (red line) and the true calibration from which the test data for this exercise were generated (blue line). The calibration measurements obtained by averaging 100 points at each value of the measurand are shown as blue dots.


--- layout: post authors: ["Greg Wilson"] title: "UCOSP as a Model" date: 2014-09-28 time: "10:30:00" tags: ["Teaching", "Noticed"] ---
Software Carpentry's two-day workshops are just one of many ways to teach people practical skills. Term-long group projects are another model that I'm very fond of, and earlier this year, the four people who've been running the UCOSP program in Canada wrote a paper about what they've learned. Some of the lessons rhyme with what we've learned from Software Carpentry, but other insights are new. If you know of papers describing lessons learned from other innovative teaching projects, pointers in the comments section would be very welcome.


Random |
Animate.css & anim8js |
Defering |
Filters |
jQuery Plugin |
Orbitting Elements |
Reference Values |
Sequence Animations |
Springs |
Spring Parser |
Spring Chain |
Transitioning |
Transitioning Into |
Transitioning Smooth |
Transitioning Smart |
Transitioning Before |
Tween |
TweenTo |
Relative |
Move |
Move Direct |
Physics Parser |
Travel |
Simultaneous |
'and' parser |
'queue' parser


--- title: call_to_action: Contact background_image_path: "/Holmlegal.jpg" large_header: true ---
Welcome to the official Holm Legal page!
Holm Legal is professional in representation. Our team has the knowledge and skills to get you desired results.
{% endfor %}


GNSDK for Mobile (Android) provides a broad range of documentation and sample code to help you develop GNSDK applications. The documentation is in two formats:
In general, each of these contain the same content. The main difference is that the PDF documentation does not contain API Reference content because of its size and complexity. API Reference documentation is generated from the GNSDK source files and provided in HTML format accessible from the HTML5 Help system.
GNSDK for Mobile (Android) has the following doc set:
| Document | Description |
|---|---|
| GNSDK for Mobile (Android) Help | The most comprehensive format of GNSDK for Mobile (Android)documentation. Includes API Reference and Developers Guide content. |
| GNSDK for Mobile (Android) Developers Guide | Detailed information about developing GNSDK for Mobile (Android) applications in a printable format. No API Reference content. |
| GNSDK for Mobile (Android) Release Notes (PDF only) | Summary of what's new and changed in this release. |
You can develop GNSDK for Mobile applications using several popular object-oriented languages. The following table describes these APIs and where to find the corresponding API Reference documentation:
| API Name | Description | Location in Package |
|---|---|---|
| Java (Android) API Reference | API descriptions of the GNSDK for Mobile Java Android interface | docs/html/Content/api_ref_java_android/html/index.html |
| Code Samples | Description | Location in Package |
|---|---|---|
| Java Sample applications |
Applications you can compile and run that demonstrate specific GNSDK for Mobile (Android) features. |
samples_java |


About
The above self-portrait was painted in 1889 by Dutch post-impressionist Vincent van Gogh. It might have been the last self-portrait that Van Gogh painted. The painting is currently at the Musée d'Orsay in Paris.
For this NFT collection, this particular portrait has been analyzed and deconstructed. New facial features and attributes have been imagined and hand drawn in the same style as the original oil painting.
Recombining these new features into new and unique art works, results in the portraits of the fictitious Brothers of Vincent. The NFTs themselves present the variations of the self-portrait in a way to convey different emotions, and different elements through striking similarities, yet are all unique, to present Vincent Van Gogh in 1,889 unique variations.


--- layout: post status: publish published: true title: Bring me Bob Howry author: display_name: Corey Fineran login: Corey email<EMAIL_ADDRESS>url: '' author_login: Corey author_email<EMAIL_ADDRESS>wordpress_id: 2654 wordpress_url: http://ivyenvy.com/?p=2654 date: '2010-05-20 21:33:52 +0000' date_gmt: '2010-05-21 03:33:52 +0000' categories: - Relief Pitching tags: - arizona diamondbacks - Bob Howry - Carlos Silva comments: - id: 1319 author: Matt Veto author_email<EMAIL_ADDRESS>author_url: '' date: '2010-05-20 21:55:32 +0000' date_gmt: '2010-05-21 03:55:32 +0000' content: Duly noted! - id: 1320 author: Andy author_email<EMAIL_ADDRESS>author_url: http://ivyenvy.com date: '2010-05-20 22:05:53 +0000' date_gmt: '2010-05-21 04:05:53 +0000' content: "My main concern is that I could take 10 Polaroid pictures, shake them like they are Polaroid pictures, and allow them to develop completely between each Howry pitch. \r\n\r\nI do think you guys are right about looking at the entire span of Howry's career, but I also think that you have to put a little more weight on recent struggles rather than stats that are 3-4 seasons old. But you are right, the Cubs might as well roll the dice and see what they get." - id: 1322 author: Corey author_email<EMAIL_ADDRESS>author_url: '' date: '2010-05-21 05:24:33 +0000' date_gmt: '2010-05-21 11:24:33 +0000' content: I see what you're saying about recent struggles, Andy. However, he's only pitched 14 innings this year. Look at the players in baseball (and on the Cubs) that have gotten off to slow starts. He pitched decent enough in San Fran last year to indicate that he still has something left. - id: 1323 author: Matt Veto author_email<EMAIL_ADDRESS>author_url: '' date: '2010-05-21 08:39:27 +0000' date_gmt: '2010-05-21 14:39:27 +0000' content: The only thing is, 14 innings as a reliever -- espescially in the 6th-7th inning role -- is between 7 and 14 appearances. With a 16.00 ERA, that's between 7 and 14 games that you now lose, or at least make too interesting. - id: 1324 author: Brad at Cubs Stats author_email<EMAIL_ADDRESS>author_url: http://cubsstats.blogspot.com/ date: '2010-05-21 10:24:22 +0000' date_gmt: '2010-05-21 16:24:22 +0000' content: "Concerning Howry's rough first 14 innings, we need to remember he's had an incredibly unclucky 45% LOB. Left on base (LOB) is a great stat for pitchers' luck. League average is around 70%, anything lower is unlucky.\r\n\r\nI like the signing; I think it's a clear case of low cost, high reward." - id: 1325 author: Ryan author_email<EMAIL_ADDRESS>author_url: '' date: '2010-05-21 10:49:43 +0000' date_gmt: '2010-05-21 16:49:43 +0000' content: "First of all the caption of this article is funny.\r\n\r\nSecond, Veto's point is very correct. The math alone makes any team that guy pitches for a losing team almost all of the time.\r\n\r\nIt isn't that unusual for a middle reliever to have a substantial ERA, but 16 is a tad bit higher than just being \"substantial\" \ \r\n\r\nMeehan" - id: 1326 author: Ryan author_email<EMAIL_ADDRESS>author_url: '' date: '2010-05-21 10:57:02 +0000' date_gmt: '2010-05-21 16:57:02 +0000' content: Andy is right about the pace as well. He's no Mark Buerhle (sp?) ---
I've had to endure two days of Cubs fans freaking out over the idea of Bob Howry wearing a Cubs uniform again. I collected all my thoughts and sat down to write a post. I wanted to talk about how Bob Howry isn't as bad as we remember. I wanted to talk about how horrible our bullpen is and how there aren't a lot of options right now. Then I clicked on my Google Reader and read this post on AnotherCubsBlog.net.
Spot Freaking On.
In the last few days, I've posted some on our Twitter account in favor of the move. When it comes to relief pitchers, we remember the worst and forget about the rest. The blown late innings games stand out the most. I remember 2008 Bob Howry. Up to this point, 2010 Bob Howry has been even worse than 2008 Bob Howry. But I don't know what goes on behind the scenes. Perhaps Bobby needs a new situation. The Arizona bullpen (even worse than ours) is enough to make anyone desire some new scenery.
So let's look past 2008 Bob Howry. I know it's a difficult thing to do. But, 2006 and 2007 Bob Howry were pretty efficient out of the bullpen. His ERA was 3.17 and 3.32, respectively. He also had a nearly 4-1 strikeout to walk ratio. After the horrendous 2009 season that gives us chills, Howry had a decent season last year with the Giants. He didn't appear in as many games, but got his ERA back down to 3.39. He walked a few more guys and his K to BB ratio was at 2-1. Now, 2010 Bob Howry has just been horrendous. He's got an ERA over 10 and no redeeming statistic that I could find in my 18 seconds of research.
But relief pitchers are streaky. What do the Cubs have to lose? If he sucks, they cut him loose. There aren't many options out there this early in the season.  I'd rather the Cubs buy some disposable veteran that has had a decent career rather than pull up some youngsters from the farm system and ruin them by throwing them to the wolves. Put it on the record, I am in favor of the Bob Howry experiment.


--- title: 'Notes about how I am internalizing VIM key bindings ☕' author: Cristóbal Alcázar date: '2022-05-11' slug: [VIM, CLI] categories: [VIM, CLI, WORKFLOW] tags: [VIM,WORKFLOW, CLI] comments: no showcomments: yes showpagemeta: yes ---
Wed, May 12th, 2022
To my future self:
My learning process using VIM key bindings was stuck on move commands; even though I realized the power of moving freely and accurately around the editor, I haven’t a reason to waste my life with key bindings. This post is a never-ending excuse to continue developing my VIM workflow. If I am reading this now, I am sure I forgot something.
char
or a seq
of chars n
timesSequence: ESC
-n
-i
-char/seq
-ESC
-ESC
n
: number of timesi
: insert modechar/seq
: char or sequence of charsUsage: Create a header for a file or when I need to repeat an arbitrary sequence of characters.
:s
or in all llines :%s
Sequence: :s/this/for that/g
or :%s/this/for that/g
:s
: is short for “substitute” on the current line:%s
: is short for “substitute” on the whole documentthis
: is the pattern you want to replacefor that
: you want insteadg
: is short for “global” and refers to replacing more than the first
occurrenceUsage: guess what!


Stalker
Vars, Strings, Prompt, and Console.log()
Ask for user's first name
Ask for user's last name
Ask for user's age
Print out the user's full name in a sentence
Print out the user's age in a sentence
Click to Rerun


services-admin(1) services-admin(1) NAME services-admin - Services Administration Tool SYNOPSIS services-admin [OPTION...] DESCRIPTION services-admin is part of the GNOME system tools, a set of tools to eas‐ ily access and manage system configuration. services-admin allows you to specify which services will be started dur‐ ing the system boot process. OPTIONS services-admin accepts the standard GNOME and GTK options. AUTHORS services-admin was written by Carlos Garnacho Parro <garnacho@tux‐ erver.net> and others. This manual page was written by Sven Arvidsson<EMAIL_ADDRESS>for the Debian project (but may be used by others). SEE ALSO users-admin(1), network-admin(1), time-admin(1), shares-admin(1), gtk- options(7), gnome-options(7) The online documentation available through the program's Help menu. GNOME 2007-05-08 services-admin(1)


In brief, Sunbeam is a first-person puzzle/exploration game, inspired by games like The Witness and The Talos Principle. It is set on a small planet with a series of puzzles involving using mirrors to direct sunlight onto solar panels. As you progress through the game, you will unravel the mysteries behind the world and how you came to be there. What are all these mirrors and solar panels intended for? Who has been leaving message pods lying around, and what happened to them? You are free to explore at your own pace and as you solve the gently taxing logic puzzles more and more of the world opens up for you.
Credits:
Design Tim Waskett Game play programming Tim Waskett Tools programming Tim Waskett Reid Alford Shader programming Nick Polchies Environmental design Nick Baker Narrative Chris Markle 3D modelling Tim Waskett Caspar Dunant Micky Turner Christer Kaitila Oasis Rim Chris DeLeon Music James C. Hoffman Sound effects Micky Turner Play testing JL Evans Jeremy Kenyon Christer Kaitila Diego Souza Marcus Silva Sergio Solorzano Caspar Dunant Matthew Ko Chris DeLeon Nick Polchies
Home Back


public final class Camera extends Component
Camera component, everything in the view of the camera is rendered every frame.
| Constructor and Description |
|---|
Camera() |
| Modifier and Type | Method and Description |
|---|---|
static java.lang.Iterable<Camera> |
getAllCameras()
Get all cameras.
|
static Camera[] |
getAllCamerasSorted()
Get all cameras, sorted by their
depth . |
Color |
getClearColor()
Get the clear color.
|
CameraClearFlags |
getClearFlags()
Get the clear flags.
|
static Camera |
getCurrentCamera()
Get the current camera.
|
int |
getDepth()
Get the depth.
|
float |
getFarClipPlane()
Get the far clipping plane (zFar).
|
float |
getFieldOfView()
Get the field of view.
|
static CameraInternal |
getInternalCamera(Camera camera) |
static Camera |
getMainCamera()
Get the main camera.
|
float |
getNearClipPlane()
Get the near clipping plane (zNear).
|
org.joml.Matrix4f |
getProjection()
Get the projection matrix.
|
Texture |
getSkybox()
Get the skybox texture.
|
org.joml.Matrix4f |
getViewMatrix()
Get the view matrix.
|
Rect |
getViewport()
Get the viewport.
|
protected void |
onCreate() |
protected void |
onDestroy() |
protected void |
onPostUpdate() |
void |
render()
Make the camera render now.
|
void |
setClearColor(Color clearColor)
Set the clear color.
|
void |
setClearFlags(CameraClearFlags clearFlags)
Set the clear flags.
|
void |
setDepth(int depth)
Set the depth.
|
void |
setFarClipPlane(float zFar)
Set the far clipping plane (zFar).
|
void |
setFieldOfView(float fieldOfView)
Set the field of view.
|
static void |
setMainCamera(Camera camera)
Set the main camera.
|
void |
setNearClipPlane(float zNear)
Set the near clipping plane (zNear).
|
void |
setProjection(org.joml.Matrix4f projection)
Manually set a projection matrix,
note that this gets overwritten when you make a call to:
|
void |
setSkybox(Texture skybox)
Set the skybox texture.
|
void |
setViewport(Rect viewport)
Set the viewport.
|
getComponent, getComponents, getGameObject, getTransform
destroy, getName, setName, toString
protected final void onCreate()
protected final void onPostUpdate()
protected final void onDestroy()
public final void render()
Make the camera render now.
public final void setClearFlags(CameraClearFlags clearFlags)
Set the clear flags.
clearFlags
- The new clear flags.public final void setSkybox(Texture skybox)
Set the skybox texture.
skybox
- The new skybox texture.public final void setClearColor(Color clearColor)
Set the clear color.
clearColor
- The new clear color.public final void setProjection(org.joml.Matrix4f projection)
Manually set a projection matrix, note that this gets overwritten when you make a call to:
projection
- The new projection.public final void setViewport(Rect viewport)
Set the viewport.
viewport
- The new viewport.public final void setFieldOfView(float fieldOfView)
Set the field of view.
fieldOfView
- The new field of view.public final void setNearClipPlane(float zNear)
Set the near clipping plane (zNear).
zNear
- The new near clipping plane.public final void setFarClipPlane(float zFar)
Set the far clipping plane (zFar).
zFar
- The new far clipping plane.public final void setDepth(int depth)
Set the depth.
Cameras with a lower depth value will be rendered first.
depth
- The new depth.public final CameraClearFlags getClearFlags()
Get the clear flags.
public final Texture getSkybox()
Get the skybox texture.
public final Color getClearColor()
Get the clear color.
public final org.joml.Matrix4f getProjection()
Get the projection matrix.
public final org.joml.Matrix4f getViewMatrix()
Get the view matrix.
public final Rect getViewport()
Get the viewport.
public final float getFieldOfView()
Get the field of view.
public final float getNearClipPlane()
Get the near clipping plane (zNear).
public final float getFarClipPlane()
Get the far clipping plane (zFar).
public final int getDepth()
Get the depth.
public static void setMainCamera(Camera camera)
Set the main camera.
camera
- The new main camera.public static Camera getMainCamera()
Get the main camera.
public static Camera getCurrentCamera()
Get the current camera.
The current camera is the camera that's currently rendering, can be null
.
public static java.lang.Iterable<Camera> getAllCameras()
Get all cameras.
public static Camera[] getAllCamerasSorted()
Get all cameras, sorted by their depth
.
depth
.public static CameraInternal getInternalCamera(Camera camera)


In the original series Star Trek episode Obsession, Captain Kirk tells an ensign that one pound of antimatter can destroy a solar system. The truth is considerably less dramatic. One pound of antimatter equates to 19.5 megatons, which is comprable to a modern day H-bomb. In order to help prevent such mistakes from occurring in the future, I present the anti-matter caculator. Just plug in the amount of antimatter you're thinking of using and the calculator will return just how much destructive force it contains.


Privacy Policy
Last updated: August 28, 2017
This Privacy Policy describes how Minimum, Inc. (or �Minimum�, �we�) treats personal information that we receive when people and companies use our product (also called �Minimum�).
Information we collect and how we use it
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identifiable individual.
We may collect personal information when:
Minimum
securely stores in its own system directory information such as employee names,
pictures, titles, and contact information. You may update this information as a
user or your company may give it to Minimum.
Minimum also connects with services on mobile devices, including other apps and
location services.
Minimum does all of the above for the purpose of providing Minimum�s service to
you and your company.
In
general, you can visit our website without telling us who you are or submitting
any personal information. We collect the Internet Protocol (�IP�) addresses of
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We use this information to help us understand the use of our website, and to
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Service
Provider Arrangements: We may transfer your personal
information to third parties who provide services on our behalf. For example,
we may use service providers to host parts of our services, operate some of its
features, and send email or other communications on our behalf. Our service
providers are given the information they need to perform the services we
request, and we do not authorize them to use or disclose personal information
for their own marketing or other purposes. We and our service providers may
maintain or process your personal information in the US or other jurisdictions.
Sale of Business:
We may transfer any information we have about you as an asset in connection
with a merger or sale (including transfers made as part of insolvency or
bankruptcy proceedings) involving all or part of Minimum, or as part of a
corporate reorganization or stock sale or other change in corporate control.
Legal: Minimum
and our service providers may provide your personal information in response to
a search warrant or other legally valid inquiry or order, or to an
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provide links to third party websites as a convenience to the user. These links
are not intended as an endorsement of or referral to the linked websites. The
linked websites have separate and independent privacy statements, notices and
terms of use, which we recommend you read carefully. We do not have any control
over such websites, and therefore we have no responsibility or liability for
the manner in which the organizations that operate such linked websites may
collect, use or disclose, secure and otherwise treat your personal information.
Children:
Our Services are not intended for children under 13 and we do not intend to
collect personal information from children under the age of 13.
We have implemented measures designed to help protect personal information in our custody and control. We maintain administrative, technical and physical safeguards in an effort to protect against unauthorized access, use, modification and disclosure of personal information in our custody and control. We have personal information retention processes designed to retain personal information of our customers for no longer than necessary for the purposes stated above or to otherwise meet legal requirements.
You have the right to access, update, and correct inaccuracies in your personal information in our custody and control, subject to certain exceptions prescribed by law. You may request access, updating and corrections of inaccuracies in personal information we have in our custody or control by emailing or writing to us at the contact information set out below. We may request certain personal information for the purposes of verifying the identity of the individual seeking access to their personal information records.
This Privacy Policy may be updated periodically to reflect changes to our personal information practices. The revised Privacy Policy will be posted on this website. We encourage you to refer to this Privacy Policy for the latest information about our personal information practices.
Contacting our Privacy Officer
Please contact us if:
Email<EMAIL_ADDRESS>Mail:
Anthony Longo c/o Minimum, 77 N. Washington Street, 4th Floor,
Boston, MA 02114


--- layout: post esbma_id: 1172 title: Make More Mistakes date: 2003-12-19 17:00:07 keywords: bos teaser: "Would you like me to give you a formula for success? It's quite simple, really. Double your rate of failure. You are thinking of failure as the enemy of success. But it isn't as all. You can be discouraged by failure — or you can learn from it. So go ahead and make mistakes. Make all you can. Because, remember that's where you will find success." -- Thomas J. Watson, Sr. ---
Summary: In an effort to encourage new entrepreneurs, Eric spills his guts about the mistakes he has made and the lessons he has learned.
Robert Scoble, weblogger extraordinaire, recently said, "I want to see more software companies, not fewer." I heartily agree.
At the risk of being too obvious, let us observe that every ISV is started by an entrepreneur who somehow overcomes fear of failure. The genesis of a new company usually involves hundreds of hours of study, deliberation, and conversation, most of which is focused on a single question: "Can I make this business work?"
That process is healthy and necessary. It involves market research and number crunching and presentations and conjecture and coffee, all of which are critical elements of business success.
Invariably, the process also involves a great deal of self-examination. The core question isn't just "Can this business work at all?" but rather, "Can I make this business work?" This, too, is healthy and necessary. I've seen research studies that show that self-awareness is the number one factor in success. There is no substitute for knowing your own abilities and limitations.
But the self-examination stuff usually includes some basic worrying as well. Entrepreneurs tend to worry about the mistakes they might make. Unlike all the other research and study and deliberation that happens in the formation of a new company, this worrying actually isn't all that helpful.
To continue quoting only from the giants of the technology industry, let me now cite a remark made by Thomas J. Watson, Sr., founder and former CEO of IBM:
Would you like me to give you a formula for success? It's quite simple, really. Double your rate of failure. You are thinking of failure as the enemy of success. But it isn't as all. You can be discouraged by failure -- or you can learn from it. So go ahead and make mistakes. Make all you can. Because, remember that's where you will find success.
-- Thomas J. Watson, Sr.
I don't think Watson advocated courage to the point of recklessness. After all, I'm sure IBM did plenty of prudent market research and planning during his tenure.
But Watson makes a very important point for new entrepreneurs: Mistakes just don't need to be all that scary.
Life in a small ISV feels like a never-ending stream of decisions, many of which you were never trained to make:
None of my college classes taught me how to make these choices, so I had to learn by doing. Actually it would be more accurate to say that I learned this stuff by doing it badly. In the seven years since I started SourceGear, I have made lots and lots of mistakes. Although the memories of my failures sometimes sting, the lessons I have learned have been so valuable.
Through all these mistakes I have learned an important distinction. Whenever a decision yields bad results we call it a "mistake," but actually "clueless errors" are quite different from "bad bets."
In high school I once cost my math team a trophy by writing down "102/17" as my answer. I did all the calculations correctly, but I failed to realize that this fraction can be further reduced to "6". Leaving my answer in the incorrect form was not a calculated risk--I simply did not see the alternative. My math team coach was quick to observe what a knucklehead I was, and he was right. This was a clueless error.
If any kind of mistake is worth worrying about, I suppose clueless errors qualify. These are the ones where you can't see the bad result coming.
We can take some consolation in the fact that experience helps. Over time, we will tend to make fewer and fewer mistakes of this kind. However, that's not helpful now, when you're trying to decide whether your new company is going to make it.
To some extent, you can reduce the likelihood of clueless errors by reading. Almost every successful entrepreneur is a voracious reader. But take care: it is possible to learn about entrepreneurship by reading, but only if you approach it properly.
Reading is not a place to find the answers to your problems. On the other hand, reading is a way to learn the background which can help you figure out your own answers.
Sometimes a so-called mistake is actually just a calculated risk that did not pay off. You were aware of the possibility of the bad outcome in advance. You placed a bet that the bad outcome wouldn't happen, and you were wrong.
This is basic risk-taking. Study all the outcomes that might happen, analyze the probabilities, and make a choice. Remember to account for the fact that the status quo is a choice. If you don't want to become an expert at choosing your risks, then don't become an entrepreneur. A lot of your bets just aren't going to work out, but you still have to go back to the table and try again. There is no business without risk.
You also have to be prepared to deal with those who are waiting to gloat when your bets don't work out. When you take a risk and get burned, there will be a chorus of "I-told-you-so's" from people who would never have taken that risk in the first place. Sometimes their feedback is part of the learning experience, but not always. Perhaps their posture toward risk is simply different than yours.  In all likelihood, your personal sphere includes at least one person who would fold with four jacks when the opponent has a possible straight flush.
Sometimes you have to ignore the naysayers.
When I was interviewed after SourceGear won the Inc. 500 award in 2002, they asked me to share the biggest surprise of my experience as an entrepreneur. I told them my biggest surprise was that someone could make as many mistakes as I have and still end up on the Inc. 500 list. :-)
I often share the following advice with other entrepreneurs: "Make all the non-fatal mistakes that you can--don't make any of the fatal ones." Given that guideline, so far I'm rather happy with the mistakes I've chosen. As you are about to see, I've done some truly dumb things, but SourceGear is still in business today.
In the sections below I tell the stories behind some of my biggest failures at SourceGear. Some of these tales are really embarrassing, but they're still an important part of my history. I learned an important lesson from every one of them, and I have no regrets.
SourceGear's first year of business was 1997. We started out by doing custom software development projects for companies bigger than us. In fact, one of our first deals was with one of the largest and most well-known accounting firms in the world. This project was a big opportunity for us to get a "banner name" client.
The project was to build a custom application to replace a very complex Microsoft Excel spreadsheet. The company we contracted with was stretching the limitations of Excel rather badly. We decided to build the application in Java. After determining the required features, we agreed to build the app for a fixed cost of $28,000 (USD). The project was a disaster.
We knew our bid was a little low, but we realized in hindsight that we might have underbid by an order of magnitude. When the project finally got killed, we had expended well over $100,000 in effort.
Lesson learned: Be careful about fixed-bid projects.
Circa 1998, betting on Java for a graphical user interface (GUI) application was suicidal. The platform simply didn't have the maturity necessary for building quality user interfaces. I chose Java because I was "head over heels" in love with it. I adored the concept of a cross-platform C-like language with garbage collection. We were hoping to build our Java expertise and make this exciting new technology our specialty.
But Java turned out to be a terrible frustration. The ScrollPane widget did a lousy job of scrolling. Printing support routinely crashed. The memory usage was unbelievably high.
I should have gotten over my religious devotion to semicolons and done this app in Visual Basic.
Lesson learned: Be careful about using bleeding-edge technologies.
When I first started the company, I rented one room in an office building. As the company grew, we simply rented more rooms. Eventually we started talking about moving. After considering several alternatives, I ignored the advice of a wise friend and bought an office building. Within a year we outgrew the building and I sold it at a loss.
Lesson learned: Small ISVs should do software and stay out of real estate.
In early 1998, Netscape announced that the source code for its browser would be made publicly available. As a former participant in the browser wars, I found this news to be incredibly exciting. Somehow I knew that "open source" was going to become an important trend. I jumped on this bandwagon with both feet by launching AbiSource, an effort to build an open source office suite, starting with a word processor.
I had a big vision. I predicted that a wave of open source and Linux IPOs would happen and that AbiSource would be one of them. I began writing business plans and preparing to get funding. We wrote code like mad and unveiled the first public release of AbiWord at the O'Reilly Open Source Developer Day in August 1998.
AbiWord turned out to be a great way to get buzz. People really liked the story. Our tradeshow booths were packed. The press considered our idea a novelty and liked to write stories about us. In perhaps the strangest piece of attention we received, a Microsoft exec mentioned AbiWord in the antitrust trials (referred to on page 16 of the transcript) as evidence that Microsoft Office was facing viable competition.
But although AbiWord was fun, it was never much of a business. Our funding search didn't go very well. The buzz of AbiWord got us in the door, but we always walked out with no money. Tim O'Reilly said no. Bob Young said no. Frank Batten said no. Bill Kaiser said no. Hindsight confirmed these gentlemen to be as smart as we all know them to be.
Hadar Pedhazur also said no, but he said more than that. Hadar is probably the most "clueful" venture capital guy I've ever known. He spent a lot of time talking with me, and eventually convinced me that it would be extremely difficult to make the AbiSource business model work. The research and development costs of a word processor are simply too high to give it away. After my discussions with Hadar, I made the decision to abandon AbiWord as a business. (At the time of this writing, the AbiWord project continues to move forward as a community project.)
Lesson learned: Investors don't like low-margin business models.
After the death of AbiWord, the prevailing question in our company was "What now?" We still had a moderately successful developer tool product, but we wanted to do more, so we continued looking for new business ideas. We weren't ready to give up on the open source world, so we decided to get into developer tools with an open source twist. We designed a product which we code-named "RADish," intended to be "the Visual Basic of Linux." Suffice it to say that this idea didn't last long. Visual Basic is mostly about rapid development of desktop apps for the corporate environment. Linux didn't (and still doesn't) have any substantial penetration in that space. RADish was designed to solve a problem that almost nobody has.
Lesson learned: A market with no competition ain't.
It seems like ancient history now, but during my AbiWord and RADish days I really wanted to get some outside capital funding. I was watching the dotcom bubble produce ridiculous valuations and I wanted my company to play, too. I pitched my business ideas to all kinds of investors. When that didn't work, I decided to hire someone to do the fundraising.
I should have heeded the advice of Doug Colbeth. Prior to starting my own company, I worked as a programmer for Spyglass, where Doug was the CEO. Around the time of the Spyglass IPO, Doug humorously explained to us the hierarchy of the world's true scumbags:
Of course, not all investment bankers are bad eggs. Still, there is some irony in the fact that Doug's joke turned out to have a grain of truth in it in my experience. When I was in my "funded company" funk, a guy whose firm specialized in raising private placement capital for small companies contacted me. I ended up signing an investment banking agreement with this guy who promised to connect us to some investors who had a whole bunch of capital. As you can already guess, this guy's help gained us no investors.
Lesson learned: The negative connotations of the word "middleman" are often deserved.
Believe it or not, this tale gets even worse. I failed to have an attorney review this agreement, and it had a big problem in it. We ended up paying this guy $40,000 cash to cancel the agreement.
Lesson learned: All contracts must be reviewed by an attorney. No exceptions.
I wish working with the investment-banking weasel was my worst financial decision. Unfortunately, it doesn't even come close.
In the fall of 2000, we were hoping to get more involved in building high-end websites. Somebody introduced us to a newly formed print magazine that had big plans for expansion. The people producing the magazine were looking for seed capital as well as for a technology partner to help them get their magazine onto the Web. We decided to jump in with both feet.
 They never found any other investors. They never paid us for phase 1. Phase 2 obviously never happened.
Lesson learned: Cash is supposed to flow from your customers to you, never the other way around.
Not all of my boneheaded moves have been financial. I've somehow found time to work in a few truly ridiculous technology choices as well.
After failing at word processors and magazine publishing, we decided perhaps it was time to refocus on our core competency: developer tools. Through it all, SourceOffSite had continued to be our flagship product. In late 2000 we decided to build another edition of SourceOffSite with some more collaborative features built in. This product (which we do still sell) is called SourceOffSite Collaborative Edition, or "Collab" for short.
Actually, Collab has thousands of customers and they generally like it very much. It's not a bad product at all. The biggest problem with Collab is that we spent far too long building it. We built too much of the underlying platform instead of building on the platforms which were already available.
Everything crystallized for us at the 2001 Professional Developers Conference. Listening to all the presentations about the new Microsoft .NET, we realized that we had created from scratch our own implementation of Web services, completely incompatible with any other.
Lesson learned: Small ISVs should build apps, not platforms.
As I write this, it has been just over two years since the 2001 PDC. In hindsight, that event was the time when many of the lessons I had been learning really started to get put to use. Just after that PDC, we made a lot of tough decisions about our company direction. We got ourselves out of the contracting business, which allowed us to focus exclusively on our own products. We decided to build Vault, which has been very popular. Since then, SourceGear has hit its stride and found its identity. In the future, we will face new challenges, and once again we'll try to figure out which are the best risks for us to take on.
As you can see, I've made some clueless errors and I've taken some risks that didn't work out at all. These mistakes dovetail with my successes and form my history. Truth be told, every CEO has similar tales to tell. If everybody told their stories, we would almost certainly see that success and failure are as strongly correlated as Watson said.
I hope you have read these stories and said to yourself, "I can do better than that!" These stories are my contribution to stamping out the fear of failure. As Scoble said, we need more small ISVs, not fewer.
Eric Sink is the non-legendary founder of SourceGear, a developer tools ISV located in Illinois, which offers the worst weather patterns of any inhabited region on earth (or so he claims). His weblog is at https://ericsink.com/.
This article originally appeared on the MSDN website.


Building Position Tool
- Change building's path and gable angles.
Tool Operation
- Click building to select.
- Drag handles to reposition.
- Click on path to add corner within it.
- Enter = Save, Esc = Cancel.
Context Menu
- Reverse Path - Change on what side of path building is drawn.
- Add to Path - Toggle whether new corners can be added.
- Side to Follow Path - Whether the path should define the front or back side.
Building Positioning
- The path should follow plot edge meaning a building facing the street has its facade on it while a building facing the yard usually has a firewall on it.


Setting Up Your HTML File¶
Step 7: Setting up your HTML file¶
Before you can begin to start making your game, you have to begin making your HTML file, index.html
. You can begin by pasting this template:
<!DOCTYPE html>
<html>
<head>
<title>My Proton Game</title>
<script src="proton/wrapper.js"></script> <!-- Loads the wrapper script for Proton, which tells the engine how to run -->
<script src="proton/engine.js"></script> <!-- Loads the engine script for Proton, which provides a user-friendly interface for dealing with the Proton3DInterpreter -->
</head>
<body style="background: white;">
<button id="play">Click to play</button> <!-- You have to have a click-to-play button for Proton since you have to call a function to start your game. -->
<script>
// Now you can write your game in JavaScript!
</script>
</body>
</html>
Step 8: Setting up your code¶
Now that your HTML file is set up, you can finally start making your game! Wait… we still have to set up Proton. You can paste this in your <script> element.
// Loads all scripts.
init();
// Does the game.
var game = new GameCode( function () {
Proton.init();
// You can start importing your scene here!
} );
play.onclick = function () {
// Sets the game to start when all scripts inserted by Proton are loaded
game.autoStart();
};
Finally! Now we’re ready to make a game!


Interactive Permissions
Tips and Suggestions
Useful information for contributors
JIRA usage
It’s good to leverage JIRA, but everything that happens there should be considered invisible for the most part and only reviewed on a random and infrequent basis.
A good way to bring jira "discussion" back to the list is to follow up on the list rather than posting more jira comments. Maybe by having the first followup comment be a link to Nabble’s "forum" view of the list. Optionally, you can Cc<EMAIL_ADDRESS>and include "[jira](jira.html) OPENEJB-XXX" anywhere in your subject line and your email will get added as a jira comment.
For those looking to contribute, there are some good habits to put into use. We use a permission scheme called "Interactive Permissions." It’s description has some good information:
This permissions model differs from the Standard Permissions model in that people in the Contributor role must interact with the dev list to get to get issues assigned to them and issues closed. This isn't a trust issue, more that there are a few benefits.
-
Active contributors hitting the list to begin and end work shows other people not yet active how to get involved.
-
Adds more "touch points" between Contributors and Committers. It should be possible to "see" the active contributors even if you are not watching the JIRA or SVN notifications. It’s also hoped that the practice of announcing your intentions on the dev list will persist even when the Contributor becomes a Committer.
-
Gives Committers the opportunity to help, mentor or otherwise get the Contributor going in the right direction before a task is started; potentially resulting in fewer rejected patches, less waisted Contributor time, and more collaborative development.
-
Overall brings more communication to the dev list before all work is done and all decisions made giving more potential to collaboration.
{}If you'd like to get added to the openejb-contributors JIRA group, just ping the list with your JIRA id and someone will add you.{}
Commits
Contributed by: David Blevins Here is an email from David Blevins explaining the things he keeps in mind during commits. {}Definitely worth a read{}{}:
I generally try never to reformat a file and make changes at the same time as it makes it impossible for anyone to see what I’ve changed. Needle in a haystack. I try to get the reformatting as its own commit before or after I change a file.
 I tend to like to "clear them out" in separate commits as to isolate the big change in one commit. Sometimes I’m not so good at that and other times I’m really meticulous about it.
Include the JIRA number and title (if there is a jira). I try never to say "Fixed FOO-2543" all by itself. Reviewing the last 10 changes on a file is a super big PITA when all you see is numbers to other systems. I shoot for more or less "Fixed <issue-number> <issue-title> <how-did-i-fix-it>" Sometimes the "how did i fix it" part is obvious by the title, other times not. Sometimes I’m too tired and the wife is impatiently waiting for me to leave the computer :-) As far as jiras go, there doesn’t have to be a jira for absolutely every commit — what’s the point of that. I try to make sure there’s a jira for anything we’d definitely want to see in the release notes. Sometimes I don’t get the jira created till long after the change, towards release time when creating the release notes :-) It’s pretty easy to forget stuff that way though :-)
As far as jira titles, I always try and make them short and succinct for the future release notes.
SVN + JIRA
Contributed by: Vamsi
I had trouble figuring out if a revision is related to a JIRA and what all revisions corresponded to a particular JIRA. So, I always include the JIRA number (if there is an associated JIRA) in the svn comment and once committed, I add the revision number to the JIRA comment. It may be a minute or two more to do this. But, it saves a lot of time if you ever have to investigate a regression or if there are multiple revisions for a JIRA you know where to find the revision numbers instead of having to mine the svn logs.
Some files may be missing $Rev$ and $Date$ in the header. Whenever I modify an existing file, I always check if I have to add these missing $Rev$ $Date$ and add those so that the file will have them from my next commit onwards.
Contributed by: David Blevins
If you put "\[jira\](jira\.html) OPENEJB-XXX" anywhere in your subject line and cc<EMAIL_ADDRESS>our email gets added as a comment with all '> quoted' text stripped out. PS: XXX is the JIRA issue number
Details
The following subject lines did work: - Subject: \[jira\](jira\.html) OPENEJB-670 - Subject: Some other subject prefix (\[jira\](jira\.html) OPENEJB-670) - Subject: Re: Some other subject prefix (\[jira\](jira\.html) OPENEJB-670)
The following subject lines did not work: - Subject: OPENEJB-670 - Subject: Some other subject prefix (jira: OPENEJB-670) - Subject: Some other subject prefix (jira OPENEJB-670) - Subject: Some other subject prefix (OPENEJB-670)
It appears that as long as the subject contains "\[jira\](jira\.html) FOO-XXX" the email contents will be added as comments.
It also appears that all quoted text regardless of place in the email is stripped out and the remaining text is added as the comment.
The exact email bodies, white space and all, for the "reply text" comments above are:
<one> Reply text at the top.
— David
On Aug 23, 2007, at 1:02 PM, David Blevins wrote:
Testing adding comments via email with this subject line "Some other subject prefix (\[jira\](jira\.html) OPENEJB-670)"
</one>
<two>
On Aug 23, 2007, at 1:02 PM, David Blevins wrote:
Testing adding comments via email with this subject line "Some other subject prefix (\[jira\](jira\.html) OPENEJB-670)"
Reply text at the bottom.
David
</two>
<three> On Aug 23, 2007, at 1:02 PM, David Blevins wrote:
Testing adding comments via email
Some reply text
with this subject line "Some other subject prefix (\[jira\](jira\.html) OPENEJB-670)"
Some more reply text
David
</three>
scp, ssh, and rsync examples for working with files and directories on people.apache.org
Contributed by: David Blevins
copying a file to apache from locahost
scp topsecret.tar.gz<EMAIL_ADDRESS>scp index.html kmalhi@people.apache.org:public_html/
copying a file from apache to localhost — reverse of the above
scp kmalhi@people.apache.org:topsecret.tar.gz ./ scp kmalhi@people.apache.org:public_html/index.html ./
copying directories
scp \-r kmalhi@people.apache.org:public_html ./ scp \-r public_html<EMAIL_ADDRESS>When the directory exists, better to rsync
pull a dir from apache
rsync \-v \-e ssh \-lzrptog kmalhi@people.apache.org:public_html ./ rsync \-v \-e ssh \-lzrptog kmalhi@people.apache.org:/home/kmalhi/public_html ./
the two above commands do the exact same thing
push the same dir to apache
rsync \-v \-e ssh \-lzrptog ./public_html<EMAIL_ADDRESS>rsync \-v \-e ssh \-lzrptog ./public_html kmalhi@people.apache.org:/home/kmalhi/
the two above commands do the exact same thing
sometimes useful to execute commands over ssh (piping works too)
ssh people.apache.org ls /home \| tee home-dirs-on-apache.txt echo \-e 'Hello, me\n\nHow am I doing today?' \| ssh<EMAIL_ADDRESS>mail \-s 'Greetings'<EMAIL_ADDRESS>For Putty users Contributed by: Mohammad I have Putty on my linux machine and it is easier to use, Putty has a Windows version too, I issue this command to upload a file to my home dir on people.apache.org
pscp [[file-name] | [dir] ] mnour@people.apache.org:~/
and if you want to access your home page, you should create a dir with the name public_html, and then upload files to it.
A cool subversion tip
Contributed by: Jacek Laskowski.
It’ll let you forget about some svn administrative commands you’d otherwise have to type in on the command line. Edit/Add the following configurations to \~/.subversion/config:
[miscellany] global-ignores = *.log *.save *.o *.lo *.la #*# .*~ *~ .#* .DS_Store build dist target *.ipr *.iml *.iws .project .classpath .settings enable-auto-props = yes [auto-props] *.c = svn:eol-style=native;svn:keywords=Date Author Id Revision HeadURL *.cpp = svn:eol-style=native;svn:keywords=Date Author Id Revision HeadURL *.h = svn:eol-style=native;svn:keywords=Date Author Id Revision HeadURL *.dsp = svn:eol-style=CRLF *.dsw = svn:eol-style=CRLF *.sh = svn:executable;svn:eol-style=native;svn:keywords=Date Revision *.cmd = svn:mime-type=text/plain;svn:eol-style=CRLF *.bat = svn:mime-type=text/plain;svn:eol-style=CRLF Makefile = svn:eol-style=native;svn:keywords=Date Author Id Revision HeadURL *.obj = svn:mime-type=application/octet-stream *.bin = svn:mime-type=application/octet-stream *.bmp = svn:mime-type=image/bmp *.class = svn:mime-type=application/java *.doc = svn:mime-type=application/msword *.exe = svn:mime-type=application/octet-stream *.gif = svn:mime-type=image/gif *.gz = svn:mime-type=application/x-gzip *.jar = svn:mime-type=application/java-archive *.jelly = svn:mime-type=text/plain;svn:eol-style=native;svn:keywords=Date Revision *.jpg = svn:mime-type=image/jpeg *.jpeg = svn:mime-type=image/jpeg *.pdf = svn:mime-type=application/pdf *.png = svn:mime-type=image/png *.tgz = svn:mime-type=application/octet-stream *.tif = svn:mime-type=image/tiff *.tiff = svn:mime-type=image/tiff *.zip = svn:mime-type=application/zip *.txt = svn:mime-type=text/plain;svn:eol-style=native;svn:keywords=Date Revision *.xml = svn:mime-type=text/xml;svn:eol-style=native;svn:keywords=Date Revision *.ent = svn:mime-type=text/plain;svn:eol-style=native;svn:keywords=Date Revision *.dtd = svn:mime-type=text/plain;svn:eol-style=native;svn:keywords=Date Revision *.vsl = svn:mime-type=text/plain;svn:eol-style=native;svn:keywords=Date Revision *.xsd = svn:mime-type=text/xml;svn:eol-style=native;svn:keywords=Date Revision *.xsl = svn:mime-type=text/xml;svn:eol-style=native;svn:keywords=Date Revision *.wsdl = svn:mime-type=text/xml;svn:eol-style=native;svn:keywords=Date Revision *.htm = svn:mime-type=text/html;svn:eol-style=native;svn:keywords=Date Revision *.html = svn:mime-type=text/html;svn:eol-style=native;svn:keywords=Date Revision *.css = svn:mime-type=text/css;svn:eol-style=native;svn:keywords=Date Revision *.js = svn:mime-type=text/plain;svn:eol-style=native;svn:keywords=Date Revision *.jsp = svn:mime-type=text/plain;svn:eol-style=native;svn:keywords=Date Revision *.txt = svn:mime-type=text/plain;svn:eol-style=native;svn:keywords=Date Revision *.java = svn:mime-type=text/plain;svn:eol-style=native;svn:keywords=Date Revision *.properties = svn:mime-type=text/plain;svn:eol-style=native;svn:keywords=Date Revision *.sql = svn:mime-type=text/plain;svn:eol-style=native;svn:keywords=Date Revision
Maven tips
Contributed by: Jacek and David I want to make a small change in a module , for example openejb-core and then want to build a snapshot of openejb-standalone, start the server and test my change. What is the easiest and fastest way of doing it? Run the following from within openejb-core
mvn -Dtest=none install
Now run the following from within openejb-standalone
mvn -Dtest=none clean package
So what if I wanted to do the above in a single command? It’s possible with ${module} and ${assemble} properties and create a profile or a plugin
Another option is and if you’re in bash, here’s what could be done
# camping out in assembly/openejb-standalone/ $ (cd ../../container/openejb-core && mvn clean install -Dtest=skip) && mvn clean install && ./try.sh
That’s one command, parens and all. The first "$" is the prompt,don’t type that. Then just edit ./try.sh to do what you’re looking for on the standalone zip.
The parens in bash are great as nothing done in there lasts — at least no changes to the environment. So you can 'cd' around all you want and not have to 'cd' back when done.
For example
$ export FOO=hello && (export FOO=byebye) && echo $FOO hello $ cd ~ && echo $PWD && (cd /tmp && echo $PWD) && echo $PWD /Users/dblevins /tmp /Users/dblevins
As well, several commands can be combined with '&&'. Far better than just separating commands with ';' as if one of the commands fail, the remaining commands will not be executed.
Suggestion from Dain
> I suggest that you always do a full build (with tests) before > committing. I do this even if the change is small because I have been > burned too many times by trivial changes. At the very least I suggest you > run > > mvn -Dtest=none clean install > > Using \-Dtest=none instead of \-Dmaven.test.skip=true causes maven to > compile the test classes so you know that your change doesn't have compile > errors. > If you want to be thorough, run with \-Dassemble.
JAXB Usage
TODO: Create a write up from here http://www.nabble.com/jaxb-question-td18023648.html


{% comment %} # Copyright 2009-2010 by Ka-Ping Yee # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. {% endcomment %}
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Hello! My name is Sarah O'Shea and I am a web developer trained in the full stack with an emphasis on Ruby on Rails and Javascript. Most recently I have been focusing on front-end development and teaching myself new frameworks such as Angular.
Connect with me via social media, view my past work , or email me if you just want to say hi!
When it comes to your website, you want someone who can provide a range of services to make sure you get everything you need in one place.


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Kieffer Moore "reaping the rewards" from Wales style
Kieffer Moore says Wales are ready to realise their Euro 2020 dream even if their style would not win any prizes in the beauty stakes.
Wigan striker Moore has made a huge impact in Wales’ Euro 2020 qualifying campaign as Ryan Giggs’ side have turned their fortunes around.
Moore scored his second goal in three qualifiers as Wales beat Azerbaijan 2-0 in Baku on Saturday evening, leaving the Dragons in control of their own destiny heading into the final game.
Wales will secure automatic qualification for next summer’s European Championship finals by beating Hungary at a sold-out Cardiff City Stadium on Tuesday.
“Sometimes it is not the prettiest football, but if it is effective it is definitely worth doing,” said the 6ft 5ins Moore, whose aerial ability has provided Wales with an extra dimension to their game.
“Defenders are maybe not used to going up for headers quite a lot in international football. I believe we get a massive advantage from doing that.
“I am very suited to the way this team sets up and plays.
“As you can see I am reaping the rewards and working hard for the team as well.”
Moore has joined a star-studded attacking unit which features players from Real Madrid, Juventus, Liverpool and Manchester United.
But the Latics striker has shown no signs of suffering from an inferiority complex playing alongside the likes of Gareth Bale, Aaron Ramsey, Harry Wilson and Daniel James.
“They say some nice things,” Moore said.
“I just need to keep going and keep bringing the ball down and supplying them with it.
“Obviously they are massive attacking threats. If I can keep giving the ball to them, it stands us in good stead.
“I will do anything for the team, put my body around. It is a lot easier for me with the better players here.”
Wales have gone five games unbeaten since losing a summer double-header to Croatia and Hungary that put their Euro 2020 qualification hopes in jeopardy.
Moore had not played for Wales at that stage as he was still making a full recovery from the horrific fractured skull injury he sustained in February.
The 27-year-old made his debut in the September friendly win against Belarus and has been an ever-present since.
This will definitely rank as the biggest game of my career. It is massive.Kieffer Moore
“I am enjoying myself,” Moore said. “I am buzzing to play and the performances have been really good lately.
“We have that momentum on our side and we are going to use it and go again Tuesday.
“This will definitely rank as the biggest game of my career. It is massive.
“There is everything on the line, hopefully it is going to be successful and we will qualify.”
body check tags ::


Piracy ain't no fun!
Stealing a small piece of candy is one thing.
But stealing the Swf for a video maker is wrong!
Go to
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continue anyway (risky)


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Hi.1
Another hi.[^pt]
Klingon insult, meaning something like “weirdo,” deriving from the verb “to be weird” (taQ), with and [sic] you (plural) imperative prefix (pe-). ↩


I’m a Ph.D. candidate in Computer Science Department at Hong Kong Baptist University. I work with the Database group.


| | |
- raytracing.matrixgroup.MatrixGroup(raytracing.matrix.Matrix)
-
- LaserPath
class LaserPath(raytracing.matrixgroup.MatrixGroup) |
| |
LaserPath(elements=[], label='')
LaserPath: the main class of the module for coherent
laser beams: it is the combination of Matrix() or MatrixGroup()
to be used as a laser path with a laser beam (GaussianBeam)
at the entrance.
Usage is to create the LaserPath(), then append() elements
and display(). You may change the inputBeam to any GaussianBeam(),
or provide one to display(beam=GaussianBeam())
Gaussian laser beams are not "blocked" by aperture. The formalism
does not explicitly allow that. However, if it appears that a
GaussianBeam() would be clipped by finite aperture, a property
is set to indicate it, but it will propagate nevertheless
and without diffraction due to that aperture. |
| |
- Method resolution order:
- LaserPath
- raytracing.matrixgroup.MatrixGroup
- raytracing.matrix.Matrix
- builtins.object
Methods defined here:
- __init__(self, elements=[], label='')
- Initialize self. See help(type(self)) for accurate signature.
- createBeamTracePlot(self, axes, beams)
- Create a matplotlib plot to draw the laser beam and the elements.
- display(self, inputBeam=None, inputBeams=None, comments=None)
- Display the optical system and trace the laser beam.
If comments are included they will be displayed on a
graph in the bottom half of the plot.
- drawBeamTrace(self, axes, beam)
- Draw beam trace corresponding to input beam
Because the laser beam diffracts through space, we cannot
simply propagate the beam over large distances and trace it
(as opposed to rays, where we can). We must split Space()
elements into sub elements to watch the beam size expand.
We arbitrarily split Space() elements into N sub elements
before plotting.
- drawWaists(self, axes, beam)
- Draws the expected waist (i.e. the focal spot or the spot where the
size is minimum) for all positions of the beam. This will show "waists" that
are virtual if there is an additional lens between the beam and the expceted
waist.
It is easy to obtain the waist position from the complex radius of curvature
because it is the position where the complex radius is imaginary. The position
returned is relative to the position of the beam, which is why we add the actual
position of the beam to the relative position.
- eigenModes(self)
- Returns the two complex radii that are identical after a
round trip, assuming the matrix of the LaserPath() is one
round trip: you will need to duplicate elements in reverse
and append them manually.
- laserModes(self)
- Returns the laser modes that are physical (finite) when
calculating the eigenmodes.
- rearrangeBeamTraceForPlotting(self, rayList)
Methods inherited from raytracing.matrixgroup.MatrixGroup:
- ImagingPath(self)
- LaserPath(self)
- append(self, matrix)
- Add an element at the end of the path
- drawAt(self, z, axes, showLabels=True)
- Draw each element of this group
- drawPointsOfInterest(self, z, axes)
- Labels of general points of interest are drawn below the
axis, at 25% of the largest diameter.
AS and FS are drawn at 110% of the largest diameter
- flipOrientation(self)
- Flip the orientation (forward-backward) of this group of elements.
Each element is also flipped individually.
- hasFiniteApertureDiameter(self)
- True if ImagingPath has at least one element of finite diameter
- largestDiameter(self)
- Largest finite diameter in all elements
- trace(self, inputRay)
- Trace the input ray from first element until after the last element
Returns a ray trace (i.e. [Ray()]) starting with inputRay, followed by the ray after
each element. If an element is composed of sub-elements, the ray will also be
traced in several steps.
- transferMatrices(self)
- The list of Matrix() that corresponds to the propagation through
this element (or group). For a Matrix(), it simply returns a list
with a single element [self].
For a MatrixGroup(), it returns the transferMatrices for
each individual element and appends them to a list for this group.
- transferMatrix(self, upTo=inf)
- The transfer matrix between front edge and distance=upTo
If "upTo" falls inside an element of finite length, then
it will request from that element a "partial" transfer matrix
for a fraction of the length. It is up to the Matrix() or
MatrixGroup() to define such partial transfer matrix when possible.
Quite simply, Space() defines a partial matrix as Space(d=upTo).
Methods inherited from raytracing.matrix.Matrix:
- __mul__(self, rightSide)
- Operator overloading allowing easy to read matrix multiplication
For instance, with M1 = Matrix() and M2 = Matrix(), one can write
M3 = M1*M2. With r = Ray(), one can apply the M1 transform to a ray
with r = M1*r
- __str__(self)
- String description that allows the use of print(Matrix())
- axesToDataScaling(self, axes)
- For drawing properly arrows and other things, sometimes
we need to draw along y in real space but in x in relative space
(i.e. relative to the width of the graph, not x coordinates).
There are transforms in matplotlib, but only between axes-display,
and data-display, not between data-axes. Here we obtain the scaling
so we can set arrow properties intelligently
- backFocalLength(self)
- The focal lengths measured from the back vertex.
This is the distance between the surface and the focal point.
When the principal plane is not at the surface (which is usually
the case in anything except a thin lens), the back and front focal
lengths will be different from effective focal lengths. The effective
focal lengths is always measured from the principal planes, but the
BFL and FFL are measured from the vertex.
If the matrix is the result of the product of several matrices,
we may not know where the front and back vertices are. In that case,
we return None (or undefined).
Currently, it is assumed the index is n=1 on either side and
both focal distances are the same.
- backwardConjugate(self)
- With an image at the back edge of the element,
where is the object ? Distance before the element by
which a ray must travel to reach the conjugate plane at
the back of the element. A positive distance means the
object is "distance" in front of the element (or to the
left, or before).
M2 = M1*Space(distance)
# M2.isImaging == True
- displayHalfHeight(self)
- A reasonable height for display purposes for
an element, whether it is infinite or not.
If the element is infinite, currently the half-height
will be '4'. If not, it is the apertureDiameter/2.
- drawAperture(self, z, axes)
- Draw the aperture size for this element. Any element may
have a finite aperture size, so this function is general for all elements.
- drawCardinalPoints(self, z, axes)
- Draw the focal points of a thin lens as black dots
- drawLabels(self, z, axes)
- Draw element labels on plot with starting edge at 'z'.
Labels are drawn 50% above the display height
- drawPrincipalPlanes(self, z, axes)
- Draw the principal planes
- drawVertices(self, z, axes)
- Draw vertices of the system
- effectiveFocalLengths(self)
- The effective focal lengths calculated from the power (C)
of the matrix.
Currently, it is assumed the index is n=1 on either side and
both focal lengths are the same.
- focalDistances(self)
- Synonym of effectiveFocalLengths()
- focusPositions(self, z)
- Positions of both focal points on either side of the element.
Currently, it is assumed the index is n=1 on either side and both focal
distances are the same.
- forwardConjugate(self)
- With an object at the front edge of the element, where
is the image? Distance after the element by which a ray
must travel to reach the conjugate plane of the front of
the element. A positive distance means the image is "distance"
beyond the back of the element (or to the right, or after).
M2 = Space(distance)*M1
# M2.isImaging == True
- frontFocalLength(self)
- The focal lengths measured from the front vertex.
This is the distance between the surface and the focal point.
When the principal plane is not at the surface (which is usually
the case in anything except a thin lens), the back and front focal
lengths will be different from effective focal lengths. The effective
focal lengths is always measured from the principal planes, but the
BFL and FFL are measured from the vertices.
If the matrix is the result of the product of several matrices,
we may not know where the front and back vertices are. In that case,
we return None (or undefined).
Currently, it is assumed the index is n=1 on either side and
both focal distances are the same.
- magnification(self)
- mul_beam(self, rightSideBeam)
- Multiplication of a coherent beam with complex radius
of curvature q by a matrix.
- mul_matrix(self, rightSideMatrix)
- Multiplication of two matrices. Total length of the
elements is calculated. Apertures are lost. We compute
the first and last vertices.
- mul_ray(self, rightSideRay)
- Multiplication of a ray by a matrix. New position of
ray is updated by the physical length of the matrix.
If the ray is beyond the aperture diameter it is labelled
as "isBlocked = True" but can still propagate.
- pointsOfInterest(self, z)
- Any points of interest for this matrix (focal points,
principal planes etc...)
- principalPlanePositions(self, z)
- Positions of the input and output principal planes.
Currently, it is assumed the index is n=1 on either side.
- traceMany(self, inputRays)
- Trace each ray from a list from front edge of element to
the back edge.
Returns a list of ray traces for each input ray.
See trace().
Data descriptors inherited from raytracing.matrix.Matrix:
- __dict__
- dictionary for instance variables (if defined)
- __weakref__
- list of weak references to the object (if defined)
- determinant
- hasPower
- isImaging
- If B=0, then the matrix is from a conjugate plane to another
(i.e. object at the front edge and image at the back edge).
In this case, A = transverse magnification, D = angular magnification
As usual, C = -1/f (always).
Data and other attributes inherited from raytracing.matrix.Matrix:
- __epsilon__ = 1e-05
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