Subset of the OpenGL 3D graphics API designed for embedded devices such as mobile phones.
-5
votes
4answers
1k views
How to implement a 2d collision detection for Android
I am making a 2d space shooter using opengl ES. Can someone please show me how to implement a collision detection between the enemy ship and player ship. The code for the two classes are below:
...
23
votes
3answers
9k views
Workaround to losing the OpenGL context when Android pauses?
The Android documentation says:
There are situations where the EGL
rendering context will be lost. This
typically happens when device wakes up
after going to sleep. When the EGL
context is ...
5
votes
2answers
2k views
OpenGL ES 2.0: Mixing 2D with 3D
Is it possible to mix 2D and 3D graphics in a single OpenGL ES 2.0 game, please?
I have plenty of 2D graphics in my game. The 2D graphics is represented by two triangular polygons (making up a ...
15
votes
3answers
7k views
What is the difference between OpenGL ES and OpenGL?
Android uses OpenGL ES, what is the difference between it and OpenGL?
3
votes
2answers
1k views
polygon triangulation algorithm
I need to triangulated a polygon for rendering in opengl es on android ( no glu triangulation available)
Is there an already known algorithm for this? The polygon can be convex or concave (with no ...
2
votes
1answer
160 views
culling lines on the back of a globe
I am drawing a simple outline of the world using GL_LINE_STRIPs (in WebGL).
I want to not draw those lines that are on the other side of the spinning globe.
Using Nicol Bolas approach below I am ...
7
votes
2answers
2k views
Tile map/terrain implementation with differing heights of neighbouring tiles
Ahoy!
I'm looking for some information about tile maps, or rather, what a specific type of tile map is called.
I'm interested in the kind of implementation used in rollercoaster tycoon, or the ...
12
votes
2answers
11k views
OpenGL ES 2.0: Setting up 2D Projection
This article describes in general, how to draw sharp OpenGL 2D graphics, using fixed function pipeline.
http://basic4gl.wikispaces.com/2D+Drawing+in+OpenGL
Because OpenGL ES 2.0 has some ES 1.x ...
5
votes
1answer
1k views
Game Code Design for Rendering
I first created a game on the iPhone and I'm now porting it to Android. I wrote most of the code in C++, but when it came to porting it wasn't so easy. The Android's way is to have two threads, one ...
4
votes
2answers
1k views
How should I represent a tile in OpenGL-es
Let me start with I am currently learning OpenGl-es using Android.
I have been having the hardest time trying to design a simple and logical way of making tiles (2d flat polygons). The tutorials tell ...
5
votes
3answers
3k views
building a game for different resolution phones
I am starting some tests for building a game on the Android program.
So far everything is working and seems nice.
However I do not understand how to make sure my game looks correct on all phones as ...
2
votes
2answers
3k views
Drawing a circle in OpenGL ES Android, squiggly boundaries
I am new to OpenGL ES and facing a hard time drawing a circle on my GLSurfaceView. Here's what I have so far.
The circle class
public class MyGLBall {
private int points=40;
private float ...
7
votes
4answers
4k views
Updating OpenGL ES 1.1 based iPhone game to use Open GL ES 2.0
I'm fairly new to anything OpenGL in general. I've made an OpenGL ES 1.1 based 2D iPhone game by working from sample code. I'm under the impression that OpenGL ES 2.0 is substantially different from ...
5
votes
2answers
741 views
Implementing fog of war in opengl es 2.0 game
Hi game development community, this is my first question here! ;)
I'm developing a tactics/strategy real time android game and I've been wondering for some time what's the best way to implement an ...
5
votes
4answers
887 views
Should we always prefer OpenGL ES version 2 over version 1.x
OpengGL ES version 2 goes a long way into changing the development paradigm that was established with OpenGL ES 1.x. You have shaders which you can chain together to apply varios effects/transforms to ...
2
votes
0answers
364 views
exporting bind and keyframe bone poses from blender to use in OpenGL
EDIT: I decided to reformulate the question in much simpler terms to see if someone can give me a hand with this.
Basically, I'm exporting meshes, skeletons and actions from blender into an engine ...
1
vote
1answer
458 views
Rotate triangle so that its tip points in the direction of the point on the screen that we last touched
OpenGL ES - Android.
Hello all, I am unable to rotate the triangle accordingly in such a way that its tip always points to my finger.
What i did : Constructed a triangle in by GL.GL_TRIANGLES. Added ...
1
vote
1answer
550 views
Sprite animation in openGL - Some frames are being skipped
Earlier, I was facing problems on implementing sprite animation in openGL ES.
Now its being sorted up. But the problem that i am facing now is that some of my frames are being skipped when a bullet(a ...
3
votes
1answer
343 views
Z Order in 2D with orthographic projection and texture atlas
I am working with a 2D game in OpenGL ES and have a question about z-order together with a texture atlas.
I am using an orthographic projection because I want pixel-perfect rendering of 2D sprites, ...
3
votes
2answers
483 views
Texture artifacts on iPad
I'm porting an iPhone game to the iPad. When I move textures "quickly" (5.0 pixels every update at a rate of 60 Hz) I start to see little "artifacts" or remnants of where the texture used to be. I'm ...
2
votes
0answers
123 views
How to make the background of an OpenGL object transparent?
It sounds so simple but i didn't get it to work.
The Background of my FrameLayout where i add the GLSurfaceView in is colored blue but there is only black.
So here is my method to initiate the ...
2
votes
1answer
3k views
Faster way to draw dynamic meshes in OpenGL ES
I'm writing a 3D game which is going to inlcude some dynamic meshes.
For now, my code looks like this :
private float[] mVertices;
private FloatBuffer mVertexBuffer;
public void onDrawFrame(GL10 ...
2
votes
2answers
2k views
How do I create a sky box with OpenGL ES 2.0?
Can you give me hint to any good sky box example in OpenGL ES 2.0? I have found only OpenGL and does not work for me.
I am doing it this way:
Initialization:
glUseProgram(m_programSkyBox.Program);
...
1
vote
1answer
162 views
How to draw an OpenGL object in another on Android? -> Eyes and Eyeballs
As i allready wrote in another question:
I'm working on OpenGL since a Week, so i'm new to the most stuff. (also my englisch isn't the best. Hop you can understand the most anyway)
So i'm ...
1
vote
0answers
68 views
How to change/modify or animate an existing OpenGL object on Android?
I maybe know understand it all a little bit better so i thoug i make a new shorter question to eventually get an answer.
Get back or delete an existing OpenGL object, then change it and draw at new. ...
1
vote
1answer
512 views
Where to start creating a 2d rain simulation with OpenGL ES 1.1?
I'm using opengl 1.1 and i'm creating a 2d side scrolling game.How can i render a 2d rain simulation?What is logic for that?
1
vote
1answer
3k views
OpenGL ES 2.0: Moving Camera in Orthogonal (2D) Projection
I have quite large 2D game scene. The scene is much larger than the screen of the LCD. Therefore, I have to move the camera (view) in desired directions, to display particular parts of the scene.
...
0
votes
1answer
96 views
Get back or delete an existing OpenGL object, then change it and draw at new. How?
With OpenGL i'm drawing for example a circle.
Can i take this drawn circle back out of the window and change something and then draw it back on the window?
Or can i /have to delete it and then draw ...
0
votes
1answer
187 views
To stop Spite animation scrolling along the background in openGL ES
After using the endless road algorithm as described here, I also implemented the scrolling of walls along with it.
I have the walk animation of the person which is stationed at the center of the ...
0
votes
1answer
161 views
OpenGLES GLSL Shader attributes always bound to 0
So I have a very simple vertex shader as follows
#version 120
attribute vec3 position;
attribute vec3 inColor;
uniform mat4 mvp;
varying vec3 fragColor;
void main(void){
fragColor = inColor;
...
