opengl-es-2.0

I am developing an android app which visualize the map of an environment and currently i am using libgdx to draw the map, also like any map application the user should be capable of zoom, rotate and moving the map, I have developed a GestureHandler class which implements GestureListener interface and interacts with a PerspectiveCamera (since i will use 3d components in the future): @Override public boolean pan(float x, float y, float deltaX, float deltaY) { float tempX = (mapView.getCamera().position.x - deltaX * 0.5f); float tempY = (mapView.getCamera().position.y + deltaY * 0.5f); mapView

I have a class which implements GLSurfaceView.Renderer and uses Open GL ES 2.0, and works perfectly as a standard application. However I'd like to expand this so that its a live wallpaper. Naturyally I've got a service class which exteds WallPaperservice, and in turn a engine class which extends WallpaperService.Engine. In the normal version of the code I can just do mGLSView = new GLSurfaceView(this); // in the engine this becomes 'new GLSurfaceView(getBaseContext());' mGLSView.setEGLContextClientVersion(2); mGLSView.setRenderer(new myRenderer()); setContentView(mGLSView); However in the

I'm trying to scale around the point using approach: translate to the point I want to scale around (pinch zoom) scale translate back It looks like: @Override public boolean onScale(ScaleGestureDetector detector) { float scaleFactor = detector.getScaleFactor(); float focusX = detector.getFocusX(); float focusY = detector.getFocusY(); Matrix.translateM(modelMatrix, 0, -focusX, -focusY, 0); Matrix.scaleM(modelMatrix, 0, scaleFactor, scaleFactor, 0); Matrix.translateM(modelMatrix, 0, focusX, focusY, 0); But when I create result MVP matrix like: Matrix.multiplyMM(MVPmatrix, 0, projectionMatrix, 0,

So I've been playing around with OpenGL ES 2.0 on Android but now got to a problem I haven't been able to solve. Apologies in advance, it appears that I'm not allowed to post more that two links (yet), so I put my three images in a Photobucket album here . I'm trying to create a 3D environment that is enclosed by transparent areas ("colored glass"). To see if it works I also put a opaque cube within. I enabled the following capabilities: GLES20.glEnable(GLES20.GL_CULL_FACE); GLES20.glEnable(GLES20.GL_DEPTH_TEST); GLES20.glEnable(GLES20.GL_BLEND); GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA, GLES20

I'm developing some software which uses a texture map to store geometry. Using GL_RGB for the internal format gives a lot of aliasing, I assume because the texture is being compressed down to GL_RGB4 by default. On a desktop I can use GL_RGB16 or GL_RGB32F (etc.) to set the internal format, but under OpenGL ES 2.0 there doesn't seem to be any of these formats. Is there an alternative, or extension, that is available under IOS which I can use? According to Apple (and my own experience) GL_RGB and GL_UNSIGNED_BYTE uses 8:8:8 storage. To drop to lower colour precision you'd need to specify a type

I have a problem with understanding GPUImage. Specifically, I can't figure out how to use GPUImageLookupFilter. I have several examples of usage in GPUImageAmatorkaFilter for example. But LookupFilter used there within GPUImageFilterGroup which I didn't understood yet either. I wonder whether I can use LookupFilter alone. I've tried this: GPUImageLookupFilter *lookup = [[GPUImageLookupFilter alloc] init]; UIImage *image = [UIImage imageNamed:@"amatorka.png"]; GPUImagePicture *lookupImageSource = [[GPUImagePicture alloc] initWithImage:image]; [lookupImageSource addTarget: lookup