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• Android Graphics Memory Limits

  - by Gordon

  I am creating an android game using opengl and a cocos2d port (http://code.google.com/p/cocos2d-android-1). I am targeting a wide range of devices and want to ensure that it performs well. I only test on a nexus one and am hoping to get some input from people with experience on slower devices. Currently the game uses two 1024x1024 textures as well…

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• Is there anything wrong with my texture loading method ?

  - by José Joel.

  I'm a noob in openGL and trying to learn as much as possible. I'm using this method to load my openGL textures, loading every .png as RGBA4444. I'm doing anything incorrect ? - (void)loadTexture:(NSString*)nombre { CGImageRef textureImage =[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:nombre ofType:nil]].CGImage;…

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• 2 Shaders using the same vertex data

  - by Fonix

  So im having problems rendering using 2 different shaders. Im currently rendering shapes that represent dice, what i want is if the dice is selected by the user, it draws an outline by drawing the dice completely red and slightly scaled up, then render the proper dice over it. At the moment some of the dice, for some reason, render the wrong dice…

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• OpenGL 2D editor ?

  - by Fevos

  I want to draw different 2D objects in OpenGL for example a path/Road ,is there any program i could draw them using a GUI then transfer them to points so i could use them in my program ?

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• Making a grid on iPhone using Opengl

  - by TheGambler

  I'm trying to make a grid similar to what you would see in these geo games(geoDefense/geometry wars). I'm wanting to apply separate transformation matrixes to each to create different effects. So, it makes since to me that I need to draw each square separately to that I can apply a different transformation to each one. The problem I'm having is…

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• own drawImage / drawLine in OpenGL

  - by Chrise

  I'm implementing some native 2D-draw functions in my graphics engine for android, but now there's another question coming up, when I observe the performance of my program. At the moment I'm implementing a drawLine/drawImage function. In summary, there are following different values for drawing each different line / image: the color the alpha…

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• Android OpenGL deltaTime Measure issue

  - by droidmachine

  I'm measuring deltaTime like that: deltaTime = (System.nanoTime()-startTime) / 1000000000.0f; startTime = System.nanoTime(); But I'm always getting different float values and because of that my game is stuttering.What can be the problem of that? 09-03 03:51:59.219: D/a(21807): 0.017184043 09-03 03:51:59.234: D/a(21807):…

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• Passing a pointer to an array to glGenBuffers

  - by Josh Elsasser

  I'm currently passing an array to a function, then attempting to use glGenBuffers with the array that is passed to the function. I can't figure out a way to get glGenBuffers to work with the array that I've passed. I have a decent grasp of the basics of pointers, but this is beyond me. This is basically how the render code works. It's…

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• How do you set a live video feed as an OpenGL RenderTarget or framebuffer?

  - by Joe

  i would like to take a live video feed from a video camera or 2 to do split screen stuff and render on top of them. How can i capture the input of the video? i found some old code that uses pbuffers.. is this still the optimal way of doing it? i guess their is a lot that depends on the connection interface, whether it is USB or fire…

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• How much market shares OpenGL2.0 in iPhone os hardwares(iPhone/iPot Touch)

  - by Eonil

  I'm planning making a game for AppStore, so I'm studying GLES. But, GLES 1.1 and 2.0 APIs are different about handling in some features.(and limitations) I have not enough time to consider both of them, I have to choosing one. 2.0 is clearly better in developer's view, but I'm worry about it's market share. I wish most users moved on…

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• aspectRatio = backingWidth / backingHeight ???

  - by carrots

  What am I doing wrong here, I can't get the result of this division: aspectRatio = backingWidth / backingHeight; I've thought I might try casting to (GLfloat) but that didn't do anything. As I step through the code I see that aspectRatio is 0 after the operation, while backingWidth is clearly 768 and backingHeight is 1029. Here…

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• Which parameter to pass to glGet for getting current framebuffer in OpenGLES iPhone.

  - by Quakeboy

  I know to use glGet to get various parameters. I need to know how to get the current GL_FRAMEBUFFER_OES and get the GLuint type framebuffer id. I need to use renderToTexture. This will make one of the classes code easier when switching back to normal framebuffer.

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• How to draw multiple arcs in openGL

  - by chaitanya

  I had a mutable array of size 15. The array has different radius values. I need to divide the circle into 15(array size) divisions And draw each arc with the radius from mutable array.

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• Pause animation in EAGLView which is in a UITableViewCell

  - by hanno

  I have an animation in a EAGLView which is itself in a UITableViewCell. How can I pause the animation in the EAGLView when the view is not visible? Normally, I would simply use the responsible UIViewController and listen to viewDidDisappear. But how do I do that if the EAGLView is in a table?

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• Image is not load Texture value is -1

  - by Mitali

  hi i Want to know what is the reason image is not load but a white view is open.When i debug the texture vale and summary value is -1. My Code is: _textures[kTexture_Background] = [[Texture2D alloc] initWithImage: [UIImage imageNamed:@"backgroundimage.png"]]; Thanks

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• Using Color.rgb() doesnt work for full 0...255 range

  - by superflyninja

  I'm writing an android game using opengl. I'm using: colour = Color.rgb(theR,theG,theB); (all ints) to store the color of a rectangle. Then I parse out the RGB to render the rectangle: colorR = Color.red(color); colorG = Color.green(color); colorB = Color.blue(color); For example for color 53,130,255 this should result in a…

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• Simple gradient issue with OpenGL on iphone simulator

  - by Paul

  i was following the tutorial from raywenderlich website, the gradient seems not to work perfectly, is it only because of the iphone simulator, or is it something else? I can't try myself with an iphone. Here is the image : And the code : -(CCSprite *)spriteWithColor:(ccColor4F)bgColor textureSize:(float)textureSize { //…

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• Complete Math Library for use in OpenGL ES 2.0 Game?

  - by Bunkai.Satori

  Are you aware of a complete (or almost complete) cross platform math library for use in OpenGL ES 2.0 games? The library should contain: Matrix2x2, Matrix 3x3, Matrix4x4 classes Quaternions Vector2, Vector3, Vector4 Classes Euler Angle Class Operations amongh the above mentioned classes, conversions, etc.. Standardly used…

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• Caching with AVPlayer and AVAssetExportSession

  - by tba

  I would like to cache progressive-download videos using AVPlayer. How can I save an AVPlayer's item to disk? I'm trying to use AVAssetExportSession on the player's currentItem (which is fully loaded). This code is giving me "AVAssetExportSessionStatusFailed (The operation could not be completed)" : AVAsset *mediaAsset =…

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• Convert SQL to LINQ in MVC3 with Ninject

  - by Jeff

  I'm using MVC3 and still learning LINQ. I'm having some trouble trying to convert a query to LINQ to Entities. I want to return an employee object. SELECT E.EmployeeID, E.FirstName, E.LastName, MAX(EO.EmployeeOperationDate) AS "Last Operation" FROM Employees E INNER JOIN EmployeeStatus ES ON E.EmployeeID = ES.EmployeeID…

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• Megjelent az Oracle Enterprise Manager 11g

  - by Lajos Sárecz

  Megjelent és letöltheto az Oracle Enterprise Manager 11gR1. Remélem az olvasók közül többen látták már a bejelentés videóját. Aki lemaradt volna róla bepótolhatja itt. Az új verzió számos újdonságot tartalmaz, melyek röviden összefoglalva az alábbiak: Eloször is az új verzió célja az alkalmazások üzemeltetése üzleti…

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• Exadata videó: az oszi érkezés Budapesten a Sysmanhoz

  - by Fekete Zoltán

  Tekintse meg a videót az elso Oracle Exadata Database Machine adatbázisgép megérkezésérol Magyarországra a Sysman Exadata Teszt és Demonstrációs Központba, ahol az extrém nagy adatbázis teljesítményt nyújtó megoldás tesztelheto és kipróbálható. A videót a Sysman készítette, megtekintheto itt: Oracle Exadata Database…

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• Are there java bindings for OpenGL ES 2.0 on the Android platform?

  - by Jeremy Bell

  I know that the recently released android ndk r3 supports opengl es 2.0 on supported phones (nexus one for example), however it doesn't say whether there are java bindings for opengl es 2.0 included in the SDK yet. Are said bindings on the way, and if not, does JOGL2 support the opengl es 2.0 profile on the android?

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• How can I write only to the stencil buffer in OpenGL ES 2.0?

  - by stephelton

  I'd like to write to the stencil buffer without incurring the cost of my expensive shaders. As I understand it, I write to the stencil buffer as a 'side effect' of rendering something. In this first pass where I write to the stencil buffer, I don't want to write anything to the color or depth buffer, and I definitely…

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• OpenGL ES 2. How do I Create a Basic Fading Streak Effect?

  - by dugla

  For the iPad app I am writing using OpenGL ES 2 I have a single quad - shaded using GLSL - that is dragged around the screen. Very basic. This works fine. But is rather boring. I want to increase the coolness a bit in the following way: when the user drags the quad it leaves a streak behind that fades over time.…

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