如何在Sprite Kit中制作一个圆形或其他形状我见过一些使用CGPath的工具,但我从未真正使用过CGPath。我可以用SKSpritenode制作正方形,但似乎无法制作三角形或圆形。
最佳答案
这将创建一个SKShapeNode并将其path属性设置为半径为16的圆形路径。
SKShapeNode *shape = [SKShapeNode node];
CGRect rect = CGRectMake(0, 0, 32, 32);
shape.path = [self circleInRect:rect];
shape.strokeColor = [SKColor greenColor];
shape.fillColor = [SKColor redColor];
shape.position = CGPointMake(100,100);
[self addChild:shape];
此方法返回以椭圆路径初始化的CGPath对象
- (CGPathRef) circleInRect:(CGRect)rect
{
// Adjust position so path is centered in shape
CGRect adjustedRect = CGRectMake(rect.origin.x-rect.size.width/2, rect.origin.y-rect.size.height/2, rect.size.width, rect.size.height);
UIBezierPath *bezierPath = [UIBezierPath bezierPathWithOvalInRect:adjustedRect];
return bezierPath.CGPath;
}
这是一条三角形的路...
- (CGPathRef) triangleInRect:(CGRect)rect
{
CGFloat offsetX = CGRectGetMidX(rect);
CGFloat offsetY = CGRectGetMidY(rect);
UIBezierPath* bezierPath = [UIBezierPath bezierPath];
[bezierPath moveToPoint: CGPointMake(offsetX, 0)];
[bezierPath addLineToPoint: CGPointMake(-offsetX, offsetY)];
[bezierPath addLineToPoint: CGPointMake(-offsetX, -offsetY)];
[bezierPath closePath];
return bezierPath.CGPath;
}