cgpath

I have been delving in to Apple's new Sprite Kit, and been using it for a while now. However I ran into an issue when trying to draw a curved path for an SKShapeNode . It just appears to draw a straight line instead. Here is a very simple example of the issue I am having - experimenting with drawing a CGPath for an SKShapeNode : CGMutablePathRef path = CGPathCreateMutable(); CGPathMoveToPoint(path, NULL, 0, 0); CGPathAddQuadCurveToPoint(path, NULL, 50, 100, 100, 0); CGPathAddLineToPoint(path, NULL, 50, -100); CGPathCloseSubpath(path); SKShapeNode *shape = [[SKShapeNode alloc]init]; shape.path

I have some CGPath (a poly with two circle) carried out on a CAShapeLayer . Can I trim/subtract paths like this? Instead of do the math, the result can be achieved at drawing time using kCGBlendModeClear . // Create the poly. CGContextBeginPath(context); CGContextMoveToPoint (context, a_.x, a_.y); CGContextAddLineToPoint (context, b_.x, b_.y); CGContextAddLineToPoint (context, c_.x, c_.y); CGContextAddLineToPoint (context, d_.x, d_.y); CGContextClosePath(context); // Draw with the desired color. CGContextSetFillColorWithColor(context, self.color.CGColor); CGContextFillPath(context); // Create

I want to animate the position of a CALayer based on a CGPath, but I want to play it backwards. Is there any way to animate a path backwards, or reverse a CGPath? animation.speed = -1; ? This may not be the best solution, but it worked for me. I told the animation to autoreverse, then started it halfway in. But to prevent it from animating back again I needed to terminate it early. - (void) animate { CAKeyframeAnimation * pathAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"]; pathAnimation.path = path; pathAnimation.duration = 15.0; pathAnimation.calculationMode =

Using the sprite kit template that comes with Xcode, I modify the scene to be as follows : #import "MyScene.h" @interface MyScene () @property (nonatomic,strong)SKNode *floor; @end @implementation MyScene -(id)initWithSize:(CGSize)size { if (self = [super initWithSize:size]) { /* Setup your scene here */ } return self; } -(void)update:(CFTimeInterval)currentTime { /* Called before each frame is rendered */ [self removeAllChildren]; self.floor = nil; self.floor = [SKNode node]; CGMutablePathRef path = CGPathCreateMutable(); CGPathMoveToPoint(path, nil, 0, 10); for(int i = 2; i<self.frame.size

Is it possible to reposition an already drawn CGPath/UIBezierPath on a view? I would like to move or change a path's position then perhaps recall the drawinRect method to just show the drawing again. From your question it sounds like you are drawing the path using Core Graphics inside drawRect: (as compared to using a CAShapeLayer ) so I'll explain the version first. Moving a CGPath You can create a new path by transforming another path. A translation transform moves the transformed object a certain distance in x and y. So using a translation transform you can move your existing path a certain