3
votes
1answer
409 views

Alpha Blending performance on IOS

I've got few questions without responses about my game development, can you help me? Here is the questions: In my game when a large object appear on the screen, the GPU go to his limits, my ...
3
votes
2answers
103 views

using DirectX to generate a sprite sheet

I am building a site in HTML5 for my client and it must run on the iPad/iPhone (i.e. Safari on iOS). They want a 3D effect where they have a simple, yet, specific product they want to show on the ...
2
votes
0answers
242 views

Displacement Mapping opengl-es [closed]

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 ...
3
votes
1answer
202 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, ...
1
vote
1answer
399 views

OpenGL ES screen to world coordinate

I am currently attempting to convert my screen coordinates to world coordinates, to be able to interact with objects. I am using glm and unProject to try and achieve this, so far this is my code: ...
1
vote
1answer
149 views

How can I ensure my Collada model fits on an iPhone screen?

Hi I am new to game development. I see many examples and tried myself like displaying triangle, cube etc. Now I am looking to render a Collada object. So I created a Collada object using Google Sketch ...
2
votes
1answer
468 views

Bad FPS for smaller size (OpenGL ES with SDL)

If you saw my other question, well, there is still a little problem: Click here to watch on youtube Basically, the frame rate is very bad on the actual device, where for some reason the animation is ...
1
vote
1answer
268 views

Drawing application on OpenGL for iOS (iPad) [closed]

Some help is needed. I'm developing drawing application on OpenGL (deployment target 4.0) for iOS (iPad). We have 3 drawing tools: pen, marker (with alfa) and eraser. I apply drawing with textures ...
3
votes
1answer
1k views

Correct use of VAO's in OpenGL ES2 for iOS?

I'm migrating to OpenGL ES2 for one of my iOS projects, and I'm having trouble to get any geometry to render successfully. Here's where I'm setting up the VAO rendering: void bindVAO(int ...
2
votes
3answers
3k views

How do I render .dae models?

I'm building a game for iOS. I'm quite new to OpenGL but what I want is to take a 3D model I have made in Google SketchUp and use it in my 3d game. The problem is I don't know how to proceed. I have ...
0
votes
1answer
345 views

Straightforward guidelines for converting OpenGL to OpenGL ES?

Is there a straightforward list of finite steps that I need to follow to convert an OpenGL program into an OpenGL ES that's used on the iPhone and iPad? I'd be using GLKit. I've seen some similar API ...
3
votes
1answer
2k views

Is glEnable obsolete/unneeded in OpenGL ES 2?

In an iOS app I am writing I am now culling all the GL 1 crap from my GL 2 code. Can I safely remove glEnable?
6
votes
2answers
1k views

Getting the number of fragments which passed the depth test

In "modern" environments, the "NV Occlusion Query" extension provides a method to get the number of fragments which passed the depth test. However, on the iPad / iPhone using OpenGL ES, the extension ...