Tests

gistfile1.txt

CGPoint CGPointApplyCATransform3D(CGPoint point, CATransform3D transform, CGPoint anchorPoint, CATransform3D parentSublayerTransform)
{
    static CALayer *sublayer, *layer;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        sublayer = [CALayer layer];
        layer = [CALayer layer];
        [layer addSublayer:sublayer];
    });
    
    objc_sync_enter(layer);
    
    layer.sublayerTransform = parentSublayerTransform;
    sublayer.transform = transform;
    sublayer.anchorPoint = anchorPoint;
    CGPoint retval = [sublayer convertPoint:point toLayer:layer];
    
    objc_sync_exit(layer);
    
    return retval;
}


- (void)testCGPointApplyCATransform3D
{
    {
        CGPoint p = CGPointMake(0, 0);
        CATransform3D t = CATransform3DMakeScale(1.8, 1.4, 0.0);
        CGPoint anchorPoint = CGPointMake(0, 0);
        CGPoint retval = CGPointApplyCATransform3D(p, t, anchorPoint, CATransform3DIdentity);
        CGPoint correct = CGPointMake(0, 0);
        STAssertEquals(retval, correct, nil);
    }
    {
        CGPoint p = CGPointMake(100, 100);
        CATransform3D t = CATransform3DMakeScale(1.8, 1.4, 0.0);
        CGPoint anchorPoint = CGPointMake(0, 0);
        CGPoint retval = CGPointApplyCATransform3D(p, t, anchorPoint, CATransform3DIdentity);
        CGPoint correct = CGPointMake(180, 140);
        STAssertEquals(retval, correct, nil);
    }
}