Questions tagged [opengl-es]

Subset of the OpenGL 3D graphics API designed for embedded devices such as mobile phones.

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787 views

libgdx game process dies on loading texture atlases

I try to load a lot of texture atlases (10) with approximately 5 (~2048x~2048)(not using PoT) .pngs each. I'm using AssetManager and there is no trouble with it on my pc but when I try it on my tablet ...
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1answer
1k views

iOS OpenGL ES 2.0 How to Billboard on Sphere and Rotate with Sphere

I have a sphere (earth) in OpenGL ES 2.0 for iOS. I also have markers that I want to place at lat/lons on the earth - but I want the markers to always face the user ( billboards ) but also move with ...
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127 views

Make a layer over an image and adjust its co-ordinates by touch

I need to make a layer over an image and adjust the layer to fit to image and get its co-ordinates of the layer. I need to adjust the layer by touch and pinch. The sample image is as below. I need ...
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1answer
2k views

Reducing Memory Use on OpenGL ES

I'm using an opengl es based framework to create my game.I have an out of memory problem on some devices.I have 15 textures with a size 1024x1024(totally 10 mb).On memory they covers a lot of space....
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1answer
146 views

android opengl-es spritesheet display number

Whats the best way to display numbers on android with opengl using a spritesheet? I like to display the number "294" using the spritesheet: http://i.stack.imgur.com/wv5Zh.png
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2answers
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OpenGL ES Framebuffer creation problem

I'm having some problems porting my D3D code to OpenGL ES. I have a Graphics Device class that encapsulates all rendering commands. The code below is in an ObjC++ file. The problem code is the called ...
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1answer
2k views

Formula for replicating glTexGen in OpenGL ES 2.0 GLSL

I also posted this on the main StackExchange, but this seems like a better place, but for give me for the double post if it shows up twice. I have been trying for several hours to implement a GLSL ...
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1answer
7k views

How to display bitmap using Texture api in android opengl

I want to display a bitmap image at screen using texture api in android opengl. Some code which I have used in our code as below. ...
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1answer
2k views

Why doesn't onSurfaceCreated ever run in this code?

I create my game element this way in my activity: ...
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1answer
718 views

2D triangle with OpenGL ES on Android

I am trying to draw a triangle on OpenGL ES. I followed a tutorial to do it. even though everything seems to be fine it does not work. Everytime I run my code it sends me back to main menu. this is ...
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2answers
8k views

Make Pong on android using OpenGL-ES

I am trying to make a simple pong game using opengl-es. I have checked out some of the tutorials/samples, but most of them are pre-dated to 2009. I am familiar with game programming, and consider ...
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1answer
1k views

Shader FloodFill Alogrithm

I'm new to openGL and shaders. Is there a way to implement shader algorithms for floodfills? Basically, I have a picture with outlines and i want to fill the insides of where the user touches it
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2answers
147 views

In OpenGL, how to confirm a primitive is rendered properly

I have to confirm that a primitive (say triangle) is rendered properly in opengl. I can use the glGetError() after a opengl draw calls(glDrawElement/glDrawArrays) Is it enough to confirm ? Is there ...
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1answer
2k views

What can be the cause of sudden lag spikes in my Android game?

My Android game has sudden lag spikes 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 ...
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1answer
34 views

OpenGL ES 2 inheriting issues [closed]

I am Having an issue where one of my classes will not inherit the other ones variable value. In the class which is inherited. It shows the value of the float just fine. But when I go to the Class ...
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4answers
6k 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: ...

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