在Sprite Kit中运行棒图动画

Question

我在SpriteKit中玩了一下，并且试图让棒图运行。由于我缺乏经验，我相信我已经以非常规的方式开始了这个过程。

我没有画出每个单独的动作帧，而是加载了棒图的单独图像（即头部，膝盖，大腿，身体，手臂等），并让他们相应地移动。到目前为止，除了跑步过程中膝盖的运动和旋转以外，所有东西都可以相互融合。

我的问题是这样的：

当大腿拉回到它的步幅，膝盖变得分离，并遵循直线步幅的结束而转动。

我的问题是这样的：

是否有连接节点大腿到小腿节点的方式，因为如果他们在每说一个“拐点”连接，而在运动？还是有一些更有效的方法？

这是我的代码的片段，它可能比我一直描述更多一点。

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))   
    } 

我知道这可能很难阅读，我已经记录了它为自己很好。 f_前缀用于“前”支线，而b用于“后”_leg。但将其视为右腿和左腿。

反正！提前致谢！我感谢任何帮助或提示！评论任何进一步的解释！ :)

Answer 1

更有效的方法是使用SKPhysicsJoint将大腿节点连接到小腿节点。