Unity3d:地铁跑酷操控解析

1.用于记录每次操作的开始点和结束点、开始时间和结束时间

public class Swipe

{

// Fields

public Vector3 end;

public float endTime;

public Vector3 start;

public float startTime;

}

2.四个滑动方向的枚举

public enum SwipeDir

{

Up,

Down,

Left,

Right,

None

}

3.监听Touch输入，得到输入的Swipe

public void HandleControls()

{

if (!this._paused && (Input.touchCount > 0))

{

Touch touch = Input.touches[0];

if (touch.phase == TouchPhase.Began)

{

this.currentSwipe = new Swipe();

this.currentSwipe.start = (Vector3) touch.position;

this.currentSwipe.startTime = Time.time;

}

if ((((touch.phase == TouchPhase.Moved) || (touch.phase == TouchPhase.Ended)) || (touch.phase == TouchPhase.Canceled)) && (this.currentSwipe != null))

{

this.currentSwipe.endTime = Time.time;

this.currentSwipe.end = (Vector3) touch.position;

SwipeDir swipeDir = this.AnalyzeSwipe(this.currentSwipe);

if (swipeDir != SwipeDir.None)

{

if (this.characterState != null)

{

this.characterState.HandleSwipe(swipeDir);

}

this.currentSwipe = null;

}

}

if ((touch.phase == TouchPhase.Ended) && (this.currentSwipe != null))

{

this.currentSwipe.endTime = Time.time;

this.currentSwipe.end = (Vector3) touch.position;

if ((this.AnalyzeSwipe(this.currentSwipe) == SwipeDir.None) && (this.characterState != null))

{

this.HandleTap();

}

}

}

}

4.处理、分析得到是Swip；通过向量的点乘，得到沿上下左右四个方向上分量做多的那个方向，作为最终结果。

private SwipeDir AnalyzeSwipe(Swipe swipe)

{

Vector3 b = Camera.main.ScreenToWorldPoint(new Vector3(swipe.start.x, swipe.start.y, 2f));

if (Vector3.Distance(Camera.main.ScreenToWorldPoint(new Vector3(swipe.end.x, swipe.end.y, 2f)), b) < this.swipe.distanceMin)

{

return SwipeDir.None;

}

Vector3 lhs = swipe.end - swipe.start;

SwipeDir none = SwipeDir.None;

float num2 = 0f;

float num3 = Vector3.Dot(lhs, Vector3.up);

if (num3 > num2)

{

num2 = num3;

none = SwipeDir.Up;

}

num3 = Vector3.Dot(lhs, Vector3.down);

if (num3 > num2)

{

num2 = num3;

none = SwipeDir.Down;

}

num3 = Vector3.Dot(lhs, Vector3.left);

if (num3 > num2)

{

num2 = num3;

none = SwipeDir.Left;

}

num3 = Vector3.Dot(lhs, Vector3.right);

if (num3 > num2)

{

num2 = num3;

none = SwipeDir.Right;

}

return none;

}

地铁跑酷的操控手感灰常好，多多学习，多多借鉴。

欢迎大家一起学习讨论研究~