Specialized Layers - iOS Core Animation - page 115

- ( CALayer *)cubeWithTransform:( CATransform3D )transform
{
//create cube layer
CATransformLayer *cube = [ CATransformLayer layer ];
//add cube face 1
CATransform3D ct = CATransform3DMakeTranslation ( 0 , 0 , 50 );
[cube addSublayer :[ self faceWithTransform :ct]];
//add cube face 2
ct = CATransform3DMakeTranslation ( 50 , 0 , 0 );
ct = CATransform3DRotate (ct, M_PI_2 , 0 , 1 , 0 );
[cube addSublayer :[ self faceWithTransform :ct]];
//add cube face 3
ct = CATransform3DMakeTranslation ( 0 , - 50 , 0 );
ct = CATransform3DRotate (ct, M_PI_2 , 1 , 0 , 0 );
[cube addSublayer :[ self faceWithTransform :ct]];
//add cube face 4
ct = CATransform3DMakeTranslation ( 0 , 50 , 0 );
ct = CATransform3DRotate (ct, - M_PI_2 , 1 , 0 , 0 );
[cube addSublayer :[ self faceWithTransform :ct]];
//add cube face 5
ct = CATransform3DMakeTranslation (- 50 , 0 , 0 );
ct = CATransform3DRotate (ct, - M_PI_2 , 0 , 1 , 0 );
[cube addSublayer :[ self faceWithTransform :ct]];
//add cube face 6
ct = CATransform3DMakeTranslation ( 0 , 0 , - 50 );
ct = CATransform3DRotate (ct, M_PI , 0 , 1 , 0 );
[cube addSublayer :[ self faceWithTransform :ct]];
//center the cube layer within the container
CGSize containerSize = self .containerView. bounds . size ;
cube. position = CGPointMake (containerSize. width / 2.0 ,
containerSize. height / 2.0 );
//apply the transform and return
cube. transform = transform;
return cube;
}
- ( void )viewDidLoad
{