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  • 2-components color model

    - by Cyan
    RGB is the natural color model for OpenGL. But a lot of other color models exist. For example, CMY(K) for printers, YUV for JPEG, the little cousins YCbCr and YCoCg, HSL & HSV from the 70's, and so on. All these models tend to share a common property : they are based on 3 components. Therefore my question is : Does it exist a 2-components color model ? I'm surprised to not find any. I was expecting something along the line of Hue+light could exist. I guess it cannot be as "complete" as a true 3-components color model, but a fine-enough approximation will be good for my usecase. The end objective is to store the 2 components into a single BC5 texture (GL_COMPRESSED_RED_GREEN_RGTC2 in OpenGL). The 3rd component requires a second fetch into a second texture, which hurts performance.

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  • What is the recommended coding style for PowerShell?

    - by stej
    Is there any recommended coding style how to write PowerShell scripts? It's not about how to structure the code (how many functions, if to use module, ...). It's about 'how to write the code so that it is readable'. In programming languages there are some recommended coding styles (what to indent, how to indent - spaces/tabs, where to make new line, where to put braces,...), but I haven't seen any suggestion for PowerShell. What I'm interested particularly in: How to write parameters function New-XYZItem ( [string] $ItemName , [scriptblock] $definition ) { ... (I see that it's more like 'V1' syntax) or function New-PSClass { param([string] $ClassName ,[scriptblock] $definition )... or (why to add empty attribute?) function New-PSClass { param([Parameter()][string] $ClassName ,[Parameter()][scriptblock] $definition )... or (other formatting I saw maybe in Jaykul's code) function New-PSClass { param( [Parameter()] [string] $ClassName , [Parameter()] [scriptblock] $definition )... or ..? How to write complex pipeline Get-SomeData -param1 abc -param2 xyz | % { $temp1 = $_ 1..100 | % { Process-somehow $temp1 $_ } } | % { Process-Again $_ } | Sort-Object -desc or (name of cmdlet on new line) Get-SomeData -param1 abc -param2 xyz | % { $temp1 = $_ 1..100 | % { Process-somehow $temp1 $_ } } | % { Process-Again $_ } | Sort-Object -desc | and what if there are -begin -process -end params? how to make it the most readable? Get-SomeData -param1 abc -param2 xyz | % -begin { init } -process { Process-somehow2 ... } -end { Process-somehow3 ... } | % -begin { } .... or Get-SomeData -param1 abc -param2 xyz | % ` -begin { init } ` -process { Process-somehow2 ... } ` -end { Process-somehow3 ... } | % -begin { } .... the indentitation is important here and what element is put on new line as well. I have covered only questions that come on my mind very frequently. There are some others, but I'd like to keep this SO question 'short'. Any other suggestions are welcome.

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  • Should I embed the sRGB color profile in JPEG files?

    - by basic6
    I have a large (growing) collection of scanned images. They are TIFF files, mostly 48 bit with the Adobe RGB color space. This color profile is integrated in the files. When such a file is opened in IrfanView (with plugins), it says (Image - Information) Adobe RGB 1998. "Normal images", like the JPG files from a digital camera, do not (necessarily) have a color profile integrated in the file. I understand that it's necessary to include the Adobe RGB profile in an image file which uses the Adobe RGB space, so the color values can be interpreted correctly. Here's a test image with a completely different color profile, programs that ignore the included profile (like MSIE8 or Gwenview) will render it as sRGB (?): I'm planning to convert my TIF files to JPG, so I'm wondering if there's anything wrong with using IrfanView that would save them as sRGB without embedding the sRGB profile. I've heard that images should always be saved with the color profile included. Since every image seems to be interpreted as sRGB by default (by software without color management), I don't understand why the sRGB profile should be included?

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  • CSS Validation Warning: Same colors for color and background-color in two contexts

    - by TankDriver
    I am getting a ton of warnings like the ones listed below when I do a CSS validation check via http://jigsaw.w3.org/css-validator/validator?uri=http%3A%2F%2Fwww.gamefriction.com%2FCoded&profile=css21&usermedium=all&warning=1&lang=en > 513 Same colors for color and > background-color in two contexts > #blue_module and #red_module_top 513 Same colors for color and > background-color in two contexts > .content ul li and #red_module_top 513 > Same colors for color and > background-color in two contexts > #footer_container and #red_module_top 513 Same colors for color and > background-color in two contexts > ul.tabs li a.active and > #red_module_top 513 Same colors for color and background-color in two > contexts #content_960 and > #red_module_top 513 Same colors for color and background-color in two > contexts #content_main and > #red_module_top 513 Same colors for color and background-color in two > contexts .content and #red_module_top > 513 Same colors for color and > background-color in two contexts > #league_module select option and #red_module_top 513 Same colors for color and background-color in two > contexts #red_module and > #red_module_top Any ideas how to fix this? CSS file: gamefriction.com/Coded/css/style.css

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  • Arithmetic Coding Questions

    - by Xophmeister
    I have been reading up on arithmetic coding and, while I understand how it works, all the guides and instructions I've read start with something like: Set up your intervals based upon the frequency of symbols in your data; i.e., more likely symbols get proportionally larger intervals. My main query is, once I have encoded my data, presumably I also need to include this statistical model with the encoding, otherwise the compressed data can't be decoded. Is that correct? I don't see this mentioned anywhere -- the most I've seen is that you need to include the number of iterations (i.e., encoded symbols) -- but unless I'm missing something, this also seems necessary to me. If this is true, that will obviously add an overhead to the final output. At what point does this outweigh the benefits of compression (e.g., say if I'm trying to compress just a few thousand bits)? Will the choice of symbol size also make a significant difference (e.g., if I'm looking at 2-bit words, rather than full octets/whatever)?

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  • Can someone explain to me C#'s coding convention?

    - by AedonEtLIRA
    I recently started working with Unity3D and primarily scripting with C#. As, I normally program in Java, the differences aren't too great but I still referred to a crash course just to make sure I am on the right track. However, My biggest curiosity with C# is that is capitalises the first letter its method names (eg. java: getPrime() C#: GetPrime() aka: Pascal Case?). Is there a good reason for this? I understand from the crash course page that I read that apparently it's convention for .Net and I have no way of ever changing it, but I am curious to hear why it was done like this as opposed to the normal (relative?) camel case that, say, Java uses. Note: I understand that languages have their own coding conventions (python methods are all lower case which also applies in this question) but I've never really understood why it isn't formalised into a standard.

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  • Coding style advice? [closed]

    - by user1064918
    I'm a newly grad. I've got a lot of complaints from my supervisor at work during code-review sessions with regard to my coding style (Surprise!). I don't know if it's just him being cranky or my style is really that annoying to read. I come from the low-level language world (assembly, mostly), so I've been taught to use bitwise ops and all the cool tricks to do math whenever possible. I also have the habits of doing some other things that've been regarded as "too excessively dense to read". So I'm hoping to get some feedback from any experienced programmers! :) Also how should I justify between code performance and readability? Thanks!!

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  • Setting coding priorities

    - by dotnetdev
    Hi, In the dev shops I've worked in, nobody has ever mentioned "coding priorities". I read this in a book or site somewhere, and sets the expectation of what priority should be first in the code. In places where this is not specified, what should the first priority be? It may sound simple to say "do what the business need requires", but that could be at the expense of performance/maintainability. Many people say maintainability first, regardless, some say fulfill the need regardless. I am a young developer, so I am probably missing the point somewhere. Of course, programming is engineering and tough because you can never have the perfect solution. Thanks

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  • experience: coding on netbooks

    - by pascal
    HI, i want to buy a netbook for doing some stuff in the train. Can someone report how it is to code simple stuff on a netbook? 10/12". I wanted to buy a very cheap one. like 1gb ram 1,6ghz blabla. and run linux on it with apache. i will code with JS/PHP. and as IDE i'll be using notepad++. so nothing big like eclispe or something else. maybe later on eclipse for java, but that doesn't really matter. so first, would this setup work fine on such a netbook and, is it okay for coding? I don't style any homepages on the netbook, I just want to code. would be nice if someone can share his experience in that. thanks :)

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  • Good Haskell coding standards

    - by Alexey Romanov
    Could someone provide a link to a good coding standard for Haskell? I've found this and this, but they are far from comprehensive. Not to mention that the HaskellWiki one includes such "gems" as "use classes with care" and "defining symbolic infix identifiers should be left to library writers only."

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  • BGR Color Space

    - by updateraj
    I understand RGB --- value (0-255)Red,(0-255)Green,(0-255)Blue to form a color. What is exactly BGR color space ? How is it different from RGB color space ?

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  • GUI design for color blindness

    - by Phillip Ngan
    It is common to represent status of an item in a GUI using the colors: red, yellow, green, to mean error, warning, and OK (or something equivalent). However, 7-10% of men have difficulty distinguishing between red and green because of color blindness. So far I've looked at Color Scheme Designer which simulates how people with different color blindnesses would perceive a set of colors, but I'm interested in hearing how you have approached this problem and how successful it was.

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  • How to make selection color be "on top" when background color for any text element is set in Visual

    - by Confused Developer
    Faced problem while setting background color for any element in Visual Studio 2010 editor. Selection color doesn't override this background color. So then it's very inconvenient to work with selections in editor. Case when only string literal is selected it's almost impossible to distinguish colors and see what part of string is selected. Is there any possibility to fix the problem by changing some options? Or it's a Visual Studio bug?

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  • Aging vs. Coding Skills

    - by Renan Malke Stigliani
    A little background, since it can be part of my point fo view. I'm a C#/Java programmer with age of 23, coding since my 18's. I started studying C and working with Cobol, and after 1 year I quickly moved to C#/Java Web Development, and have worked with it in about 3/4 companies. (I've just moved again) In my (brief) professional career I encountered some older programmers, all the times it was very hard to work with them, since I was way better programmer than they. And it is not about just the language skills, some of them had seriously problems understanding basic logic. Now I wonder how theese programmer get jobs on the market since (I imagine) they have more expenses, and thus have to make more money, and are really counter-productives. In theese examples, others project member have to constantly keep stoping for helping them out. All the times, they eventually quit... So I wonder... May the aging process slow down the learning rate and logic thinking? Does the programmer has to, or at least should, move to a management area before getting old? Please, my intention is not to be disrespectful with older persons. I am fully aware that this is NOT the case of all older programmers, I often see around very good old programmers on the net, I just never met them for close.

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  • Colorize with a given color a texture

    - by Pacha
    I have a texture and I want to "colorize" it with a given color, lets say cyan (#00ffff) or purple (#800080). What I want to do, is get all the pixel values from the texture, and remove the color and keep the "brightness" and "saturation" and apply to the desired color. There is a tool in GIMP to do this called Colorize (Colors -> Colorize.. while editing), I made an example below. This is will all be done in a shader (GLSL), although this is probably a general algorithm.

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  • Color Picking Troubles - LWJGL/OpenGL

    - by Tom Johnson
    I'm attempting to check which object the user is hovering over. While everything seems to be just how I'd think it should be, I'm not able to get the correct color due to the second time I draw (without picking colors). Here is my rendering code: public void render() { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); camera.applyTranslations(); scene.pick(); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); camera.applyTranslations(); scene.render(); } And here is what gets called on each block/tile on "scene.pick()": public void pick() { glColor3ub((byte) pickingColor.x, (byte) pickingColor.y, (byte) pickingColor.z); draw(); glReadBuffer(GL_FRONT); ByteBuffer buffer = BufferUtils.createByteBuffer(4); glReadPixels(Mouse.getX(), Mouse.getY(), 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, buffer); int r = buffer.get(0) & 0xFF; int g = buffer.get(1) & 0xFF; int b = buffer.get(2) & 0xFF; if(r == pickingColor.x && g == pickingColor.y && b == pickingColor.z) { hovered = true; } else { hovered = false; } } I believe the problem is that in the method of each tile/block called by scene.pick(), it is reading the color from the regular drawing state, after that method is called somehow. I believe this because when I remove the "glReadBuffer(GL_FRONT)" line from the pick method, it seems to almost fix it, but then it will also select blocks behind the one you are hovering as it is not only looking at the front. If you have any ideas of what to do, please be sure to reply!/ EDIT: Adding scene.render(), tile.render(), and tile.draw() scene.render: public void render() { for(int x = 0; x < tiles.length; x++) { for(int z = 0; z < tiles.length; z++) { tiles[x][z].render(); } } } tile.render: public void render() { glColor3f(color.x, color.y, color.z); draw(); if(hovered) { glColor3f(1, 1, 1); glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); draw(); glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); } } tile.draw: public void draw() { float x = position.x, y = position.y, z = position.z; //Top glBegin(GL_QUADS); glVertex3f(x, y + size, z); glVertex3f(x + size, y + size, z); glVertex3f(x + size, y + size, z + size); glVertex3f(x, y + size, z + size); glEnd(); //Left glBegin(GL_QUADS); glVertex3f(x, y, z); glVertex3f(x + size, y, z); glVertex3f(x + size, y + size, z); glVertex3f(x, y + size, z); glEnd(); //Right glBegin(GL_QUADS); glVertex3f(x + size, y, z); glVertex3f(x + size, y + size, z); glVertex3f(x + size, y + size, z + size); glVertex3f(x + size, y, z + size); glEnd(); } (The game is like an isometric game. That's why I only draw 3 faces.)

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  • Control layout using graphviz twopi

    - by vy32
    I am trying to draw a graph showing search prefixes using twopi. I have a simple input file and am getting this output: (full image) Here is the input file: digraph search { // ordering=out; // color=blue; // rank=same; // overlap=scale; rankdir=LR; root=root; ranksep=1.25; overlap=true; "root"; a [color=none,fontsize=12]; b [color=none,fontsize=12]; c [color=none,fontsize=12]; d [color=none,fontsize=12]; e [color=none,fontsize=12]; f [color=none,fontsize=12]; #g [color=none,fontsize=12]; h [color=none,fontsize=12]; i [color=none,fontsize=12]; j [color=none,fontsize=12]; k [color=none,fontsize=12]; l [color=none,fontsize=12]; m [color=none,fontsize=12]; n [color=none,fontsize=12]; o [color=none,fontsize=12]; p [color=none,fontsize=12]; q [color=none,fontsize=12]; r [color=none,fontsize=12]; s [color=none,fontsize=12]; t [color=none,fontsize=12]; u [color=none,fontsize=12]; v [color=none,fontsize=12]; w [color=none,fontsize=12]; x [color=none,fontsize=12]; y [color=none,fontsize=12]; #ga [color=none,fontsize=12]; gb [color=none,fontsize=12]; gc [color=none,fontsize=12]; gd [color=none,fontsize=12]; ge [color=none,fontsize=12]; gf [color=none,fontsize=12]; gg [color=none,fontsize=12]; gh [color=none,fontsize=12]; gi [color=none,fontsize=12]; gj [color=none,fontsize=12]; gk [color=none,fontsize=12]; gl [color=none,fontsize=12]; gm [color=none,fontsize=12]; gn [color=none,fontsize=12]; go [color=none,fontsize=12]; gp [color=none,fontsize=12]; gq [color=none,fontsize=12]; gr [color=none,fontsize=12]; gs [color=none,fontsize=12]; gt [color=none,fontsize=12]; gu [color=none,fontsize=12]; gv [color=none,fontsize=12]; gw [color=none,fontsize=12]; gx [color=none,fontsize=12]; gy [color=none,fontsize=12]; gaa [color=none,fontsize=12]; gab [color=none,fontsize=12]; gac [color=none,fontsize=12]; gad [color=none,fontsize=12]; gae [color=none,fontsize=12]; gaf [color=none,fontsize=12]; gag [color=none,fontsize=12]; gah [color=none,fontsize=12]; gai [color=none,fontsize=12]; gaj [color=none,fontsize=12]; gak [color=none,fontsize=12]; gal [color=none,fontsize=12]; gam [color=none,fontsize=12]; gan [color=none,fontsize=12]; gao [color=none,fontsize=12]; gap [color=none,fontsize=12]; gaq [color=none,fontsize=12]; #gaz [color=none,fontsize=12]; gas [color=none,fontsize=12]; gat [color=none,fontsize=12]; gau [color=none,fontsize=12]; gav [color=none,fontsize=12]; gaw [color=none,fontsize=12]; gax [color=none,fontsize=12]; gay [color=none,fontsize=12]; gaza [color=none,fontsize=12]; gazb [color=none,fontsize=12]; gazc [color=none,fontsize=12]; gazd [color=none,fontsize=12]; gaze [color=none,fontsize=12]; #gazf [color=none,fontsize=12]; gazg [color=none,fontsize=12]; gazh [color=none,fontsize=12]; gazi [color=none,fontsize=12]; gazj [color=none,fontsize=12]; gazk [color=none,fontsize=12]; gazl [color=none,fontsize=12]; gazm [color=none,fontsize=12]; gazn [color=none,fontsize=12]; gazo [color=none,fontsize=12]; gazp [color=none,fontsize=12]; gazq [color=none,fontsize=12]; gazr [color=none,fontsize=12]; gazs [color=none,fontsize=12]; gazt [color=none,fontsize=12]; gazu [color=none,fontsize=12]; gazv [color=none,fontsize=12]; gazw [color=none,fontsize=12]; gazx [color=none,fontsize=12]; gazy [color=none,fontsize=12]; root -> a [minlen=2]; root -> b [minlen=2]; root -> c [minlen=2]; root -> d [minlen=2]; root -> e [minlen=2]; root -> f [minlen=2]; root -> g [minlen=2]; root -> h [minlen=2]; root -> i [minlen=2]; root -> j [minlen=2]; root -> k [minlen=2]; root -> l [minlen=2]; root -> m [minlen=2]; root -> n [minlen=2]; root -> o [minlen=2]; root -> p [minlen=2]; root -> q [minlen=2]; root -> r [minlen=2]; root -> s [minlen=20]; root -> t [minlen=2]; root -> u [minlen=2]; root -> v [minlen=2]; root -> w [minlen=2]; root -> x [minlen=2]; root -> y [minlen=2]; root -> 0 [minlen=2]; root -> 1 [minlen=2]; root -> 2 [minlen=2]; root -> 3 [minlen=2]; root -> 4 [minlen=2]; root -> 5 [minlen=2]; root -> 6 [minlen=2]; root -> 7 [minlen=2]; root -> 8 [minlen=2]; root -> 9 [minlen=2]; root -> "." [minlen=2]; g -> ga ; g -> gb ; g -> gc ; g -> gd ; g -> ge ; g -> gf ; g -> gg ; g -> gh ; g -> gi ; g -> gj ; g -> gk ; g -> gl ; g -> gm ; g -> gn ; g -> go ; g -> gp ; g -> gq ; g -> gr ; g -> gs ; g -> gt ; g -> gu ; g -> gv ; g -> gw ; g -> gx ; g -> gy ; ga -> gaa ; ga -> gab ; ga -> gac ; ga -> gad ; ga -> gae ; ga -> gaf ; ga -> gag ; ga -> gah ; ga -> gai ; ga -> gaj ; ga -> gak ; ga -> gal ; ga -> gam ; ga -> gan ; ga -> gao ; ga -> gap ; ga -> gaq ; ga -> gaz ; ga -> gas ; ga -> gat ; ga -> gau ; ga -> gav ; ga -> gaw ; ga -> gax ; ga -> gay ; gaz -> gaza ; gaz -> gazb ; gaz -> gazc ; gaz -> gazd ; gaz -> gaze ; gaz -> gazf ; gaz -> gazg ; gaz -> gazh ; gaz -> gazi ; gaz -> gazj ; gaz -> gazk ; gaz -> gazl ; gaz -> gazm ; gaz -> gazn ; gaz -> gazo ; gaz -> gazp ; gaz -> gazq ; gaz -> gazr ; gaz -> gazs ; gaz -> gazt ; gaz -> gazu ; gaz -> gazv ; gaz -> gazw ; gaz -> gazx ; gaz -> gazy ; gazo -> "Blue Tuesday" ; "Blue Tuesday" [ fontsize=10]; // Layout engines: circo dot fdp neato nop nop1 nop2 osage patchwork sfdp twopi } This output is generated with: twopi -os1.png -Tpng s1.dot I'm posting here because the printout is pretty dreadful. All of the nodes hung of "gaz" are overlapping; I've tried specifying nodesep and it is simply ignored. I would like to see the lines from root to the single letters further apart, but again, I can't control that. This seems to be a bug in twopi. The documentation says it should clearly follow these directives, but it doesn't seem to. My questions: Is there any way to make twopi behave? Failing that, is there a better layout engine to use? Thanks.

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  • Color schemes generation - theory and algorithms

    - by daniel.sedlacek
    Hi I will be generating charts and diagrams and I am looking for some theory on color schemes and algorithm examples. Example questions: How to generate complementary or analogous colors? How to generate pastel, cold and warm colors? How to generate any number of random but distinct colors? How to translate all that to the hex triplet (web color)? My implementation will be in AS3 but any examples in metacode are welcome.

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  • Are there any widespread, modern Java coding conventions?

    - by brianegge
    Sun's "Code Conventions for the Java Programming Language" was last updated April 1999. Ten years later a lot has changed in the language, as well as general usage patterns. Are there more up to date, widely adopted standards? Most guidelines omit specifying file encoding and line endings. Sun recommends mixed tabs and spaces. The Eclipse IDE defaults to Eclipse's standard, which is tabs only. The Maven style guide is spaces only. Many style guides, such as JBoss, follow Sun's guidelines, but prefer K&R braces instead of OTBS. Each Apache project has it's own style guide, with slight differences between each one.

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  • How to serialize Color property as ARGB values?

    - by Przemaas
    I'm working with Windows Forms designer. It serializes properties of type Color as known name whenever possible. I need it to serialize such properties always as RGB, because I need it later for interop with other system, which can deserialize only from RGB values. Is there a way to serialize Color properties always as RGB values?

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  • Should i continue my self-taught coding practice or learn how to do coding professionally?

    - by G1i1ch
    Lately I've been getting professional work, hanging out with other programmers, and making friends in the industry. The only thing is I'm 100% self-taught. It's caused my style to extremely deviate from the style of those that are properly trained. It's the techniques and organization of my code that's different. It's a mixture of several things I do. I tend to blend several programming paradigms together. Like Functional and OO. I lean to the Functional side more than OO, but I see the use of OO when something would make more sense as an abstract entity. Like a game object. Next I also go the simple route when doing something. When in contrast, it seems like sometimes the code I see from professional programmers is complicated for the sake of it! I use lots of closures. And lastly, I'm not the best commenter. I find it easier just to read through my code than reading the comment. And most cases I just end up reading the code even if there are comments. Plus I've been told that, because of how simply I write my code, it's very easy to read it. I hear professionally trained programmers go on and on about things like unit tests. Something I've never used before so I haven't even the faintest idea of what they are or how they work. Lots and lots of underscores "_", which aren't really my taste. Most of the techniques I use are straight from me, or a few books I've read. Don't know anything about MVC, I've heard a lot about it though with things like backbone.js. I think it's a way to organize an application. It just confuses me though because by now I've made my own organizational structures. It's a bit of a pain. I can't use template applications at all when learning something new like with Ubuntu's Quickly. I have trouble understanding code that I can tell is from someone trained. Complete OO programming really leaves a bad taste in my mouth, yet that seems to be what EVERYONE else is strictly using. It's left me not that confident in the look of my code, or wondering whether I'll cause sparks when joining a company or maybe contributing to open source projects. In fact I'm rather scared of the fact that people will eventually be checking out my code. Is this just something normal any programmer goes through or should I really look to change up my techniques?

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  • Set A Transparent Color

    - by Ngu Soon Hui
    I have a Color, and I have a method that should return a more "transparent" version of that color. I tried the following method: public static Color SetTransparency(int A, Color color) { return Color.FromArgb(A, Color.R, Color.G, Color.B); } but for some reason, no matter what the A is, the returned Color's transparency level just won't change. Any idea?

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