SpriteKit在中间带有较​​粗笔画的线条

Question

关于如何使用SpriteKit绘制线条的任何想法？ 它们需要在中间变厚，在边缘变浅。

Answer 1

该方法添加了一条将两个点连接到场景的线...

- (void) addLineFrom:(CGPoint)p1 toPoint:(CGPoint)p2 withColor:(SKColor)color
{    
    CGFloat dx = p2.x - p1.x;
    CGFloat dy = p2.y - p1.y;
    CGFloat angle = atan2(dy, dx);
    CGFloat length = sqrt(dx*dx+dy*dy);

    SKShapeNode *shape = [SKShapeNode node];
    shape.path = [self diamondWithSize:CGSizeMake(length, 2)];
    shape.lineWidth = 0.125;
    shape.position = CGPointMake(MIN(p1.x, p2.x)+fabs(dx)/2, MIN(p1.y, p2.y)+fabs(dy)/2);
    shape.fillColor = color;
    shape.strokeColor = color;
    shape.zRotation = angle;
    [self addChild:shape];
 }    

这种方法创建了一条菱形的路径...

- (CGPathRef) diamondWithSize:(CGSize)size
{
    UIBezierPath* bezierPath = [UIBezierPath bezierPath];

    [bezierPath moveToPoint: CGPointMake(-size.width/2, 0)];
    [bezierPath addLineToPoint: CGPointMake(0, -size.height/2)];
    [bezierPath addLineToPoint: CGPointMake(size.width/2, 0)];
    [bezierPath addLineToPoint: CGPointMake(0, size.height/2)];

    [bezierPath closePath];

    return bezierPath.CGPath;

}