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

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3
votes
2answers
1k views

Cocos2D: Upgrading from OpenGL ES 1.1 to 2.0

I have recently starting upgrading my ios game to the latest Cocos2D (2.0 rc), and I am having some difficulties upgrading my texture generation code to OpenGL 2.0. In the old version I generated ...
3
votes
1answer
631 views

How do I clip an image in OpenGL ES on Android?

My game involves "wiping off" an image by touch: After moving a finger over it, it looks like this: At the moment, I'm implementing it with Canvas, like this: 9Paint pTouch; 9int X = ...
1
vote
1answer
229 views

2D map/plane with nodes overlayed that supports panning, scaling and clicking on nodes

I'm trying my hand at Android development and seem to be running into an invisible ceiling in trying to get what I want accomplished. Basically I'm trying to create an app that renders a 2D surface ...
0
votes
1answer
624 views

Rendering Texture Quad to Screen or FBO (OpenGL ES)

I need to render the texture on the iOS device's screen or a render-to-texture frame buffer object. But it does not show any texture. It's all black. (I am loading texture with image myself for ...
0
votes
1answer
340 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 ...
-1
votes
1answer
600 views

2d triangle with OpenGL-Es on Android

hey I am trying to draw a triangle on opengl es . I just followed a tutorial to do it. eventhough everything seems to be fine it does not work. everytime I run my code it sends me back to main menu. ...
3
votes
0answers
596 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 ...
3
votes
0answers
600 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 ...
2
votes
0answers
73 views

OpenGL ES Single Bitplane Texture (or something close)

I'm looking to use a texture to store single bits (or a low number of bits, two or three). This in of itself isn't hard if you're using nearest neighbor sampling with some bit plane unpacking. The ...
2
votes
0answers
182 views

iPhone GLSL shader dynamic branching issue

I am trying to pass an array of vec3 as uniform and then iterate through them on each pixel. The size of array varies on situations so I can't make the loop with constant number of iterations. ...
2
votes
0answers
992 views

How do I generate mipmap .png and model .obj files for LibGDX?

I'm playing a bit with LibGDX (OpenGL ES 2.0 wrapper for Android). I found some sample code which used prepared files to load models and mipmap textures for them, e.g., at ...
2
votes
0answers
122 views

Is there a way to export 3D objects with animation from Blender or any other app into OpenGL ES 1.1 code?

The problem is that all the examples I've found are obsolete or iOS/Android specific and not "pure" OpenGL ES 1.1. If anyone can provide me with a good example/tutorial/book it would be very much ...
1
vote
0answers
93 views

iOS OpenGLES - Multithread Game loop - Render and Update

I am trying to implementing multi-threaded game loop in iOS. (Actaully, two thread - Render and Update) This is my structure. Update Loop Has logic and at the end of loop, save update state. ...
1
vote
0answers
72 views

How to load all textures at startup in my game?

In my Android 2D game every level uses the same textures. Currently all my textures are loaded into memory in the onSurfaceCreated() method of my GLSurfaceView.Renderer when a level is choosen by ...
1
vote
0answers
63 views

Android opengles how to use glunproject

How to use glunproject in my android app? I have the following parts in my engine: A projection matrix A view matrix for the camera A model matrix for each of the objects in my world. This matrix ...
1
vote
0answers
135 views

Android multi screen rendering

Is it possible on Android to render specifically / only, to the connected Monitor/TV on the hdmi port? If so, is it possible to use OpenGL ES to render a different scene on the monitor and on the ...
1
vote
0answers
187 views

Remove “dots” noise (like from dot-matrix printer)

I have 2D array of floats. Using the floats, I generate image by doing proportional selection of color from between COLOR_MIN, COLOR_MAX – for maximal float value at given (x,y), I choose COLOR_MAX ...
1
vote
0answers
536 views

OpenGL ES multiple objects not being rendered

I am doing the following to render multiple balls move around the screen but only 1 ball is seen to appear and function. I don't know why the rest (count-1) balls are not being drawn public void ...
1
vote
0answers
135 views

Strange and erratic transformations when using OpenGL VBOs to render scene

I have an existing iOS game with fairly simple scenes (all textured quads) and I'm using Apple's "Texture2D" class. I'm trying to convert this class to use VBOs since the vertices of my objects ...
1
vote
0answers
174 views

Creation of .des files from .png files?

A DES file is text file. In this file you can find information about the atlas(sprrite sheet) file including: where to find atlas (sprite sheet) image AND describe the position of original image on ...
1
vote
0answers
634 views

Rotation deforming mesh (Opengl ES 2.0)

I'm trying to render a rotating cube on Opengl ES 2.0, using some math classes I wrote (based on a lot of online and offline info) for quaternions, matrixes and the like. As far as I know all the math ...
0
votes
0answers
46 views

How can I use a Seekbar as a brightness slider?

I am using the GLSurfaceView Renderer. I want changes to a seek bar's progress to increase the brightness of a GLSurfaceView proportionally. How do I apply a color matrix to a GLSurface view? Is ...
0
votes
0answers
16 views

Trying to use Sprite Batching with GL_COLOR_ARRAY in OpenGl ES 1.0/1.1

I'm trying to create a sprite batcher that uses GL10.GL_COLOR_ARRAY using OpenGl ES 1.0/1.1 on Android. I found two different sources that seem like they would work, they both have statements that ...
0
votes
0answers
66 views

How do I “reset” the color in OpenGl ES 1.0/1.1?

In my 2D game I use glColor4f() to set the color and draw my screen border rectangles but when I try to start drawing my game objects, made up of a texture on a rectangular "quad", using ...
0
votes
0answers
140 views

Error when create FrameBuffer: GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS

I'm using libgdx, to create some program. I need used some operation in framebuffer. For this operation I create new framebuffer, after this operation I'm call in framebuffer dispose(). When I create ...
0
votes
0answers
188 views

How are OpenGL ES 1 framebuffers and textures sized?

I am trying to draw to a texture using a framebuffer using OpenGL ES 1.1 on Android, Java. Afterwords I want to overlay this texture full-screen over my game. In theory, this works like a charm, but ...
0
votes
0answers
88 views

Motorola Defy (CyanogenMod) and OpenGL ES textures

My friend tested my game on a Motorola Defy (with CyanogenMod v4.x, I don't remember exact version number, and she is not reachable now). My game uses OpenGL ES (v1.1, and in another activity, v2.0). ...
0
votes
0answers
98 views

Android , why GLSurfaceview output is different in Various Devices (Google Nexux7,Samsung Galaxy Note II)

I have created an android app for drawing of lines,circles.. by using GLSurfaceView in OpenGLES 2.0 like an Auto cad app. The app works well with Google Nexus 7, in the sense that if we draw a ...
0
votes
0answers
147 views

Android: Using touch does not go to center

I have a simple OpenGL app that draws a circle, I want to move the circle based on where a person touches the screen. The problem is, OpenGL sees the height and width as -1 to 1, whereas Android sees ...
0
votes
0answers
67 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 ...
0
votes
0answers
555 views

Depth sorting 2D textures in a batch with OpenGL ES 2.0

I have a combo of texture atlases and sprite batches in an OpenGLES 2.0 2D game I'm developing which is working well, but I have a problem with depth sorting. I'm using atlases to reduce the number ...
0
votes
0answers
309 views

Camera rotation flicker in OpenGL ES 2.0

I implemented an orbit camera in my own OpenGL ES 2.0 application. I was getting extensive amount of flicker while rotating the camera using the mouse. When I added the line eglSwapInterval( ..., ...