opengl-es

I am working with opengl es on android. I have a 3d humanoid model on which i can put a hairstyle which is another 3d model. While rendering i could find that on the area where the two objects are very close/coincides (the head-hair region) the rendering is not proper, in fact i get different results on different mobile devices. I doubt it is z-fighting. Are there some solution for rendering close by objects properly with opengl es which will be consistent across all mobile devices. I have attached a snapshot for reference. Here i have a face model on which i have placed a hair model but

I'm new to OpenGL on Android and I have read heavily documented samples, and I kinda understand it. But before trying to do anything complex, I want to draw a simple 2D white rectangle on a black bacground. Nothing else. I'm stuck at this error: call to OpenGL ES API with no current context , which seems to be that I'm calling something from the non-OpenGL Thread . The thing is that I'm not sure what is called from the OpenGL Thread . So here's my code //============== Activity ==================// public class MainActivity extends Activity { public static String TAG = MainActivity.class

I just don't understand what is going on since I migrated to Swift 2. I have a Tabbed application and I am getting this error: <CAEAGLLayer: 0x7fb2e053fb40>: calling -display has no effect. Assertion failed: (length + offset <= _length), function commit_data, file /BuildRoot/Library/Caches/com.apple.xbs/Sources/Jet_Sim/Jet-1.50/Jet/jet_types_OpenGL.h, line 863. I know it is really vague but I don't know where to start looking for bugs. Thanks. Edit: I just realized it might be related to the fact that I am trying to embed a GameViewController into the TabbedController. However, it did not

I have a tetrahedron object created in openGL ES 2.0. What I'm trying to achieve is to show the actual wireframe of the polygon over its base color. Is there a method for achieving this effect? Also, my tetrahedron is pink. How can I change its color? In addition to what Jave said. Instead of enlarging the whole object (whose optimal amount always depends on the object and the current view) to prevent z-fighting artefacts, you can also use the polygon offset (using glPolygonOffset ), whose major application are indeed wireframe overlays. It basically works by slightly adjusting the depth

I am trying to learn opengl stuff on Android. In the gl.gltranslatef(x,y,z) call, I am shifting my texture by some units in the +ve x direction. But I am unable to find the number of pixels does 1 unit of x belong to? Here is what I am doing: I call gl.glviewport(0,0,width,height); // This will set my rectangle with 0,0 as lowerleft corner and then extend it to accommodate width and height. Then I call to gl.glfrustrum(-5,5,-7,7,3,7); // I am little confused how this call is using the dimensions I set in gl.glviewport. How will -5 to 5 units from left to right in the above call, translate to

I'm playing with OpenGL ES on iPhone and I'm trying to rotate a model by panning with the finger. I discovered the open source app Molecules that let's you do that and I'm looking at that code, but when it comes to rotate a model of mine I'm able to rotate it only around a point distant in the space (like it was in orbit as a satellite and I am the fixed planet). Any suggestion on what can be wrong? I can post the code later , maybe on demand (many lines) For the most part refer to Molecules you can find it here MOLECULES If my memory serves me correctly, I think you need to translate the