Tagged Questions

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

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Explicit render calls using RENDERMODE_WHEN_DIRTY, performance gain for games?

In the process of creating a game for android, I stumbled into a bit of uncertainty. When creating the drawing of the graphics for the game, would it be best practice to implement explicit calls to ...
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10 views

Mess not draw in android

I am using the openGL Es libary to draw the mess and fill the texture. I am having problem that mess is not drawing. Please help me to do this. MyRenderer.java public class MyRenderer extends ...
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1answer
17 views

Optimizing OpenGL ES 2.0 Drawing for Android

Platform: Android Version: 2.2 and above Acceleration: OpenGL ES 2.0 Language: Java IDE: ADT - Eclipse I am trying to utilize OpenGL ES 2.0 to rapidly accelerate the drawing of 2D Sprites for a game ...
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12 views

OpenGL ES on iOS not Rendering Object

In my iOS app I have a view in which I render an OpenGL object based on a file that I parse the vector points and normals into GLFloats. When I open up my app with the two GLFloats populated in ...
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1answer
29 views

Is it possible to write a bunch of pixels in gl_FragColor?

Has anyone familiar with some sort of OpenGL magic to get rid of calculating bunch of pixels in fragment shader instead of only 1? Especially this issue is hot for OpenGL ES in fact meanwile flaws ...
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1answer
17 views

Draw the mesh in opengl

I am drawing the mesh from the openGl es library in android. When i load light obj file then its load successfully. I mean whose vertex value are less than the 32767. When I load the heavy obj file ...
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27 views

Read the obj file in android openGL [on hold]

I am using the Opengl library in which I want to read the .Obj file from the android and draw the mesh. Share is there any library or any way to read the obj file.
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11 views

iOS seems to linearly interpolate fragment shader output

In my opinion, the following fragment shader should output blue (0,0,1) and black (0,0,0) pixels only: bool condition = [some boolean condition]; mediump float blueValue = float(condition); ...
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3answers
41 views

Is there any way to ignore libgdx images Limitation? (images must be power of two)

In libgdx framework we can only use images power of two (64x256, 128x32, etc) Because OpenGL requires it. Is there any good way to "pass" this limitation? For example: Use images 800x480.
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7 views

Draw multiple vertical lines graph with OpenGL-ES on Android to realize a Spectrum real-time analyzer

I'm new on android developing, I worked with basical opengl approaches, like particles engine or simple rotating spheres scenario on Ububntu. I'd like to realize a spectrum analyzer which getting ...
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1answer
33 views

OpenGL Add Vertices After Load

I am parsing a 3D file into OpenGL ES on an iOS device and after I get the vertices I can't seem to add them to the GLfloat containing my vertices. At the top of my file I declare this GLFloat: ...
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1answer
21 views

Android: check if opengl context has been lost

I finally found why on some Samesung devices all of the textures are appearing white . It appears that when the user opens the game, sometimes the textures are not loading and the user has to ...
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1answer
61 views

How can I duplicate the display of a UIView into another window?

I have a need to display a letterboxed 1920x1080 UIView scaled to fit onto an iPad display in landscape. That UIView also needs to be displayed on an external display (HDTV) in full resolution. The ...
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0answers
29 views

Rendering to depth texture - unclarities about usage of GL_OES_depth_texture

I'm trying to replace OpenGL's gl_FragDepth feature which is missing in OpenGL ES 2.0. I need a way to set the depth in the fragment shader, because setting it in the vertex shader is not accurate ...
3
votes
1answer
38 views

Do you need a VAO for each VBO?

Currently, I have a collection of RenderObject classes which contains a texture, a VAO and a VBO. Drawing thousands of these objects incurs a performance penalty due to all the state switching and ...

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