5. Texture coordinates, cont.

• Texture coordinates are supplied as part of the vertex attributes:

  
     // Load the UV coordinates:
      glBufferSubData(
          GL_ARRAY_BUFFER,
          6*NUM_VERTICES*sizeof(GLfloat),
          2*NUM_VERTICES*sizeof(GLfloat), UVs );
  
  

• Texture coordinates are typically normalized, put in range [0,1]

• UV coordinates are also known as texel coordinates, or coordinates of the pixels within the texture image.

• Thus, a coordinate of 0.5 will always be in the middle of the texture image, regardless of the image size