ios : Displaying a simple 3D model with GLEssentials sample code

问题

My goal is to display a simple 3D model and apply a texture on it.

I've downloaded the GLEssentials ios sample project to learn how to develop this (i'm new in ios OpenGL-ES API)

But the example model is a .model file, which I never heard about and which never appear in model bank websites.

1. What is this kind of file?
2. is the sample code compatible with other common model types (.obj, .c2d, .3ds)?
3. is it a good idea to start from this project?

回答1:

Have a look at this question:

• How to convert Blender blend (or obj) file to Qualcom Vuforia .h file

In my answer, I describe a script and accompanying Xcode project that converts .obj/.mtl files to header files suitable for OpenGL ES on iOS [link].

In response to your questions:

1. I believe the .model file is only appropriate for the sample project and is a proprietary Apple extension. It most likely contains simple data such as vertex positions.
2. I think you'd struggle to fit other model types into the sample code, which is very complex for OpenGL ES beginners. You might want to have a look at .pod files on Cocos2D here. I've seen and heard great things about it.
3. I wouldn't recommend it :)

来源：https://stackoverflow.com/questions/15029300/ios-displaying-a-simple-3d-model-with-glessentials-sample-code