Building a mini 3D animation game using OpenGL

In this recipe, we will load a texture and apply it to the square. Later, we will make a cube, and finally we will learn how to implement three-dimensional animation by rotating our cube in three-dimensions.

How to do it

Now we will start from the place we have left before and will load all the textures. To load the textures, follow the following steps:

1. First, in our vertex structure, we need to include texture coordinate information:

   typedef struct {
   GLKVector3 position; // the location of each vertex in space
   GLKVector2 textureCoordinates; // the texture coordinates for each vertex
   } Vertex;
   const Vertex SquareVertices[] = {
   {{-1, -1 , 0}, {0,0}}, // bottom left
   {{1, -1 , 0}, {1,0}}, // bottom right
   {{1, 1 , 0}, {1,1}}, // top right
   {{-1, 1 , 0}, {0,1}}, // top left
   };

2. Next, add an image (any) in our project, rename it as Texture.png, and then add the following code in viewDidLoad:

   NSString* imagePath = [[NSBundle mainBundle]
   pathForResource:...