Tagged Questions
Subset of the OpenGL 3D graphics API designed for embedded devices such as mobile phones.
1
vote
0answers
75 views
Can one use OpenGL ES from Google Go?
I've recently used Google's Go language and was impressed by its great support for parallelism. I'd like to try Go for a simple game -- just a test-case -- and I'm wondering if I can use OpenGL ES ...
4
votes
2answers
109 views
Best way to do buttons for an OpenGL ES iPhone game
I'm making a simple 2d game in OpenGL ES and I want to add movement buttons to it. What's the best way of going about this? In previous projects I've simply added UIButtons to the view but I hear ...
2
votes
1answer
104 views
Ball bouncing and throwing, how to?
I was given a task to make a 3D game for Android, but since I never programmed games and opengl until now I'm totally lost on how and where to start.
Right now I'm using libgdx framework to ease my ...
0
votes
1answer
176 views
Android - Using opengles through java vs c++
Ive been reteaching myself opengl so I can make a game on android. However Ive been struggling with how to build objects and scenes in opengl using c/c++ and passing them through the jni to the ...
1
vote
1answer
108 views
How to use OpenGL's glUseProgram?
While in the rendering loop, is it OK to call glUseProgram? Does it have a big overhead? I'm planing to use a program for each different material in the scene. I'm a real beginner with OpenGL and I'm ...
7
votes
3answers
337 views
How can I bend an object in OpenGL?
Is there a way one could bend an object, like a cylinder or a plane using OpenGL?
I'm an OpenGL beginner (I'm using OpenGL ES 2.0, if that matters, although I suspect, math matters most in this case, ...
1
vote
1answer
190 views
Why do my sprites have a dark shadow/line/frame surrounding the texture?
I'm starting OpenGL with Apple's GLKit hand I'm having some trouble to get my sprites displayed properly. The Problem is that they all are surrounded with thin dark lines. The screen shot below shows ...
3
votes
1answer
161 views
What do the components of gl_TexCoord[0] mean?
What are the differences between gl_TexCoord[0].s, gl_TexCoord[0].t gl_TexCoord[0].p and gl_TexCoord[0].x, gl_TexCoord[0].y gl_TexCoord[0].z ?
I understand that gl_TexCoord[0].x, gl_TexCoord[0].y ...
1
vote
1answer
134 views
How to convert from OpenGL to OpenGL ES?
I need to convert code from OpenGL to OpenGL ES 1.1, I found that the GLUT library is missing in that. Can anyone tell me what do I do to replace glRasterPos3f in OpenGL?
3
votes
1answer
122 views
Changing the color of some fragment of a texture using shaders
Declarative programming language QML allows to connect the elements, their properties with universal variables in shader programs description. For these purposes there is such elements as ...
3
votes
2answers
240 views
What is causing these visual artifacts on my OpenGL sprites?
What could be the cause of the defects in my characters sprite? I am using OpenGL ES 2.0. I draw my sprites in a sprite batch that uses UV coordinates from one large texture atlas. If you look around ...
-3
votes
1answer
130 views
Sudden lagspikes
My android game has sudden lagspikes sometimes. I know this is due to something going wrong. My phone has a 1ghz processor so there shouldn't be a problem.
Basically I use the Canvas class (I am ...
3
votes
2answers
117 views
What is UVIndex and how do I use it on OpenGL?
I am a noob in OpenGL ES 2.0 (for WebGL) and I'm trying to draw a simple model I've made with a 3D tool and exported to .fbx format. I've been able to draw some models that only have: A vertex buffer, ...
1
vote
0answers
315 views
How do I repeat a texture with GLKit?
I am using GLKit in order to show textures on my project. The code is like this:
-(void)setTextureImage:(UIImage *)image {
NSError *error;
texture = [GLKTextureLoader ...
0
votes
0answers
79 views
What is the best way to store meshes or 3d models in a class
I am wondering, how I should store my mesh into memory after loading it from whatever file. I have Questions floating in my head:
Should a mesh could have sub meshes or does the 3d model just store ...
