Unity3D笔记 切水果二 刀光剑影

一、步骤一创建一个空GameObject、js

二、代码

#pragma strict

var myColor:Color;

var firstPosition:Vector3;//鼠标点击的第一个点

var secondPosition:Vector3;//鼠标放开的位置

var middlePosition:Vector3;

var isClick:boolean=false;

private var lineRenderer:LineRenderer;

function Start () {

    lineRenderer=gameObject.AddComponent(LineRenderer);

    lineRenderer.material.color=myColor;

    lineRenderer.SetWidth(0.1,0.1);//设置宽度 起点宽度和终点宽度 function SetWidth (start : float, end : float) : void

}

function Update () {

    var isMouseDown=Input.GetMouseButton(0);//获取按钮

    if(isMouseDown&&!isClick){

        firstPosition=Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x,Input.mousePosition.y,1));

        lineRenderer.SetVertexCount(1);//设置线段数

        lineRenderer.enabled=true;

        lineRenderer.SetPosition(0,firstPosition);

        isClick=true;

    }

    if(isMouseDown){

        secondPosition=Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x,Input.mousePosition.y,1));

        lineRenderer.SetVertexCount(2);

        lineRenderer.SetPosition(1,secondPosition);

    }

    if(Input.GetMouseButtonUp(0)){

        isClick=false;

        secondPosition=Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x,Input.mousePosition.y,1));

        lineRenderer.SetVertexCount(2);

        lineRenderer.SetPosition(1,secondPosition);

    }

}

三、实现划线功能

四、实现刀光剑影

编辑好位置

调用刀光剑影

最终代码

#pragma strict

//var myColor:Color;

var firstPosition:Vector3;//鼠标点击的第一个点

var secondPosition:Vector3;//鼠标放开的位置

var middlePosition:Vector3;

var isClick:boolean=false;

var myRay:GameObject;

private var rayGameObject:GameObject;

//private var lineRenderer:LineRenderer;

//function Start () {

//    lineRenderer=gameObject.AddComponent(LineRenderer);

//    lineRenderer.material.color=myColor;

//    lineRenderer.SetWidth(0.1,0.1);//设置宽度 起点宽度和终点宽度 function SetWidth (start : float, end : float) : void

//}

function Update () {

    var isMouseDown=Input.GetMouseButton(0);//获取按钮

    if(isMouseDown&&!isClick){

        firstPosition=Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x,Input.mousePosition.y,1));

        //lineRenderer.SetVertexCount(1);//设置线段数

        //lineRenderer.enabled=true;

        //lineRenderer.SetPosition(0,firstPosition);

        isClick=true;

    }

    if(isMouseDown){

        secondPosition=Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x,Input.mousePosition.y,1));

        //lineRenderer.SetVertexCount(2);

        //lineRenderer.SetPosition(1,secondPosition);

    }

    if(Input.GetMouseButtonUp(0)){

        isClick=false;

        secondPosition=Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x,Input.mousePosition.y,1));

        //lineRenderer.SetVertexCount(2);

        //lineRenderer.SetPosition(1,secondPosition);

        middlePosition=(firstPosition+secondPosition)/2.0;

        var angle:float=Mathf.Atan((secondPosition.y-firstPosition.y)/(secondPosition.x-firstPosition.x));

        rayGameObject=Instantiate(myRay,middlePosition,Quaternion.AngleAxis(angle*100/3.14,Vector3.forward));

        Destroy(rayGameObject,1.0);

    }

}