Question

我在SpriteKit中玩了一下，我正试图让一个棒图运行。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。

我没有绘制每个单独的运动框架，而是加载了棒图的分离图像（即头部，膝盖，大腿，身体，手臂等）并告诉他们相应地移动。到目前为止，除了在运行过程中膝盖的运动和旋转外，所有东西都要合在一起。

我的问题是：

当大腿向后拉动时，膝盖会脱离，并在旋转时沿直线行进到步幅的末端。

我的问题是：

有没有办法将大腿节点连接到小腿节点，好像它们在运动时以“膝盖”的方式连接在一起？或者是否有更有效的方法？

以下是我的代码片段，它可能比我更具描述性。

   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))          
    }

我明白这可能很难读，我已经为自己做了很好的记录。 f_前缀用于“前”腿，b 用于“后退”_leg。然而把它想象成右腿和左腿。

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。

在Sprite Kit动画中运行棒图

1 个答案: