SpriteKit SKPhysicsBody來自CGPath多邊形問題

Question

我無法繪製一個應該看起來像半管的多邊形形狀的SKPhysicsBody。我已經得到了代碼如下：

_halfpipe_left = [SKSpriteNode spriteNodeWithImageNamed:@"halfpipe_left"]; 
    _halfpipe_left.position = CGPointMake(5*26, 5*26); 
    _halfpipe_left.anchorPoint = CGPointMake(0, 0); 

    CGMutablePathRef halfpipe_leftpath = CGPathCreateMutable(); 
    CGPathMoveToPoint(halfpipe_leftpath, NULL, 0, 0); 
    CGPathAddLineToPoint(halfpipe_leftpath, NULL, 78, 0); 
    CGPathAddLineToPoint(halfpipe_leftpath, NULL, 78, 78); 
    CGPathAddLineToPoint(halfpipe_leftpath, NULL, 52, 78); 
    CGPathAddLineToPoint(halfpipe_leftpath, NULL, 48, 59); 
    CGPathAddLineToPoint(halfpipe_leftpath, NULL, 42, 47); 
    CGPathAddLineToPoint(halfpipe_leftpath, NULL, 31, 36); 
    CGPathAddLineToPoint(halfpipe_leftpath, NULL, 19, 30); 
    CGPathAddLineToPoint(halfpipe_leftpath, NULL, 0, 26); 
    CGPathCloseSubpath(halfpipe_leftpath); 

    _halfpipe_left.physicsBody = [SKPhysicsBody bodyWithPolygonFromPath:halfpipe_leftpath]; 

當我試圖讓身體與他人互動，它的行爲就好像出現了一些小的多，走形多邊形的創建來代替。

非常感謝任何見解或幫助！

Answer 1

嘗試使用Thomas Zinnbauer創建的物理調試器。

https://github.com/ymc-thzi/physicsDebugger

其用於調試物理機構，因爲它借鑑了精靈它們的形狀一大利器。