setSize method 
    
      
void
setSize(
 - int width, 
 
- int height, [
 
- int depth = 1
 
])
      
     
    
    
  Implementation
  void setSize(int width, int height, [int depth = 1]) {
  if (this.width != width || this.height != height || this.depth != depth) {
    this.width = width;
    this.height = height;
    this.depth = depth;
			for (int i = 0, il = textures.length; i < il; i ++ ) {
				textures[ i ].image.width = width;
				textures[ i ].image.height = height;
				textures[ i ].image.depth = depth;
			}
    dispose();
  }
  viewport.setValues(0, 0, width.toDouble(), height.toDouble());
  scissor.setValues(0, 0, width.toDouble(), height.toDouble());
}