在Sprite Kit中運行棒圖動畫

Question

我在SpriteKit中玩了一下，並且試圖讓棒圖運行。由於我缺乏經驗，我相信我已經以非常規的方式開始了這個過程。

我沒有畫出每個單獨的動作幀，而是加載了棒圖的單獨圖像（即頭部，膝蓋，大腿，身體，手臂等），並讓他們相應地移動。到目前爲止，除了跑步過程中膝蓋的運動和旋轉以外，所有東西都可以相互融合。

我的問題是這樣的：

當大腿拉回到它的步幅，膝蓋變得分離，並遵循直線步幅的結束而轉動。

我的問題是這樣的：

是否有連接節點大腿到小腿節點的方式，因爲如果他們在每說一個「拐點」連接，而在運動？還是有一些更有效的方法？

這是我的代碼的片段，它可能比我一直描述更多一點。

func thigh_run(){ 
     //running config 
     //DONT CHANGE! 
     var thigh_rotation = CGFloat(M_PI)*0.8 
     //Can Change :) 
     var run_speed = NSTimeInterval(0.25) 

     // reset the action sequence... basically 
     let pos_nuetralize = SKAction.rotateByAngle(thigh_rotation/2, duration: run_speed) 
     let neg_nuetralize = SKAction.rotateByAngle(-thigh_rotation/2, duration: run_speed)    
     //strides 
     let thigh_pull = SKAction.rotateByAngle(-thigh_rotation, duration: run_speed*2) 
     let thigh_stride = SKAction.rotateByAngle(thigh_rotation/2, duration: run_speed)   
     // for the opposite leg 
     let b_thigh_pull = SKAction.rotateByAngle(-thigh_rotation/2, duration: run_speed) 
     let b_thigh_stride = SKAction.rotateByAngle(thigh_rotation, duration: run_speed*2) 

     //knee movement  
     let stride = SKAction.sequence([thigh_stride, thigh_pull, pos_nuetralize]) 
     let pull = SKAction.sequence([b_thigh_pull, b_thigh_stride, neg_nuetralize]) 
     r_arm.runAction(SKAction.repeatActionForever(stride)) 
     f_leg_thigh.runAction(SKAction.repeatActionForever(stride)) 
     b_leg_thigh.runAction(SKAction.repeatActionForever(pull)) 
     //knee_run(run_speed) 


    } 

    func knee_run(speed: NSTimeInterval){ 

     let knee_stride = SKAction.moveTo(CGPointMake(f_leg_thigh.position.x+f_leg_thigh.size.height, f_leg_thigh.position.y), duration: speed) 
     let knee_reset = SKAction.moveTo(CGPointMake(f_leg_thigh.position.x, f_leg_thigh.position.y-f_leg_thigh.size.height), duration: speed) 
     let knee_pull_rotate = SKAction.rotateToAngle(CGFloat(M_PI)/2, duration: speed, shortestUnitArc: true) 
     let knee_pull_rotate_half = SKAction.rotateToAngle(CGFloat(M_PI)*2, duration: speed, shortestUnitArc: true) 
     let knee_pull_half = SKAction.moveTo(CGPointMake(f_leg_thigh.position.x-f_leg_thigh.size.height, f_leg_thigh.position.y/2), duration: speed) 
     let knee_pull = SKAction.moveTo(CGPointMake(f_leg_thigh.position.x-f_leg_thigh.size.height, f_leg_thigh.position.y), duration: speed) 




     //Grouping of the knee moving and rotating at the same time 
     let knee_pull_group_half = SKAction.group([knee_pull_half, knee_pull_rotate_half]) 
     let knee_pull_group = SKAction.group([knee_pull, knee_pull_rotate]) 

     let f_knee_stride_seq = SKAction.sequence([knee_stride,knee_reset,knee_pull,knee_reset]) 
     let f_knee_pull_seq = SKAction.sequence([knee_pull_group_half, knee_reset, knee_stride, knee_reset]) 


     f_leg_calf.runAction(SKAction.repeatActionForever(f_knee_stride_seq)) 
     b_leg_calf.runAction(SKAction.repeatActionForever(f_knee_pull_seq))   
    } 

我知道這可能很難閱讀，我已經記錄了它爲自己很好。 f_前綴用於「前」支線，而b用於「後」_leg。但將其視爲右腿和左腿。

反正！提前致謝！我感謝任何幫助或提示！評論任何進一步的解釋！ :)

Answer 1

更有效的方法是使用SKPhysicsJoint將大腿節點連接到小腿節點。