Subset of the OpenGL 3D graphics API designed for embedded devices such as mobile phones.
3
votes
2answers
890 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 ...
-4
votes
2answers
944 views
3D architecture app for Android or iPhone
I want to make an app for 3D modeling on iPhone/Android. I cannot get the basic idea of how to get started.
I have various options such as learning OpenGL ES, UDK or Unity3d but I want to create ...
1
vote
1answer
128 views
World orientation in OpenGLES clarification
I have a 3d tile map made up of individual billboards in OpenGLES. Each is a 2 triangles mesh and has a 3D Vector to determine its position and another defining its rotation from the origin at ...
1
vote
1answer
74 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
95 views
bump mapping with 2 normal maps
I was wondering if its actually possible to do bump mapping with 2 normal maps... I have tried doing it this way however I get a function overload on max and dot.
uniform sampler2D n_mapTex;
uniform ...
0
votes
1answer
197 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
290 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.
...
-1
votes
1answer
1k views
smoke effect for a rocket in OpenGL es 1.0 android
hello i am new to game development , i have a read this thread which make a smoke effect for a rocket in OpenGL es but i have problem with understanding it can anyone suggest me some articles about it ...
6
votes
0answers
212 views
Optimizing performance of a heavy fragment shader
I need help optimizing the following set of shaders:
Vertex:
precision mediump float;
uniform vec2 rubyTextureSize;
attribute vec4 vPosition;
attribute vec2 a_TexCoordinate;
varying vec2 tc;
...
3
votes
0answers
69 views
Rotate an image and get back to its original position - opengles glkit
I need to rotate an image in opengles GLkit and get it back to its original position in GLkit.
rotation += 5;
_modelViewMatrix = GLKMatrix4Rotate( _modelViewMatrix, GLKMathDegreesToRadians(5), 1, 0, ...
2
votes
0answers
50 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
150 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
0answers
101 views
Displacement Mapping opengl-es
I need to do an application similar to this Morfo. And I posted a question here where the answer states the solution is "Displacement Mapping" . And I googled this to do it in opengles. I couldnt get ...
2
votes
0answers
307 views
Improving performance of a particle system (OpenGL ES)
I'm in the process of implementing a simple particle system for a 2D mobile game (using OpenGL ES 2.0). It's working, but it's pretty slow. I start getting frame rate battering after about 400 ...
2
votes
0answers
383 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
513 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
94 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 ...
2
votes
0answers
909 views
OpenGL ES 2.0 Camera advices and general thoughts for a 2D engine
I'm working on my first 2D OpenGL engine for iOs 5+ using GLKit (that's to say: OpenGL ES 2.0).
While I am on a good path and a lot of things are implemented and nicely working, I'd like to share with ...
2
votes
0answers
610 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 ...
1
vote
0answers
80 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. ...
1
vote
0answers
49 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
76 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
0answers
79 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
170 views
Getting contour without the background
I have a texture and vertex which are needed to create a set of closed polygons. For this purpose I use these functions:
Code for create texture:
CCSprite* spr = ...
1
vote
0answers
151 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
422 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
123 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
142 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
553 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
36 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
0answers
46 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
54 views
Cocos2d/Box2d Component based entity system
Recently I've read somewhere that it is not a good idea to inherit from CCSprite class when making your game objects. In my CBES each Game Object has :
-PhysicsComponent(responsible for updating ...
0
votes
0answers
32 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
58 views
iOS billboard rendering performance
What is the fastest way to render semi-transparent billboards (for a particle system) on iOS? I'm currently using GLES1, but if required for performance I can switch to GLES2.
Does sorting the quads ...
0
votes
0answers
234 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
79 views
Understanding fonts generated by bmGlyph
Recently, I've purchased a Mac software for generating textured fonts for use in OpenGL applications.
The software is called bmGlyph.
I used it to generate a simple Arial font output and it gave me:
...
0
votes
0answers
234 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( ..., ...
0
votes
0answers
333 views
FPS problem with 2D OpenGL ES framework
I'm using the following framework :Beginning Android Games Framework
On my phone Galaxy S2 there is 60 FPS.But on galaxy tab 10.1 fps is going down to 40.Then i remove glView.setEGLConfigChooser(8, ...
0
votes
0answers
281 views
Unity + NativeToolkit + OpenGL ES 1.1 in native view iOS
I have been working on one quite frustrating project lately. My goal is to launch iOS view from Unity (done by using NativeToolkit plugin) and then to launch an OpenGL ES 1.1 component in that view. I ...
0
votes
0answers
491 views
Projective Transfrom Image Warping on iPhone
I'd like to perform a projective-transformation (a.k.a. perspective-transformation) warp on an image.
Given the 4 2D corners of the source and target quadrangles (from these the 3x3 Homography matrix ...
