Unity 3D Game Engine – Get Mouse – Draw Line

Unity 3D Game Engine – Get Mouse – Draw Line

1. Main Camera attach the script LineMouse.js

LineMouse.js

#pragma strict

// It automatically adds Add Component> Effects> Line Renderer
@script RequireComponent(LineRenderer)

var lineRenderer : LineRenderer;
var myPoints : Vector3[];

function Start () {
    // Setup of LineRenderer Component
    lineRenderer = GetComponent(LineRenderer);
    lineRenderer.SetWidth(0.2,0.2);
}

function Update () {

    if(myPoints){

        lineRenderer.SetVertexCount(myPoints.Length);
        for(var i = 0;i<myPoints.Length;i++){
            lineRenderer.SetPosition(i,myPoints[i]);    
        }
    }
    else
    lineRenderer.SetVertexCount(0);
    
    if(Input.GetMouseButtonDown(0)){
        // it is only drawing 10 points per second, as per the line
        InvokeRepeating("AddPoint",.1,.1);
    } 
     if(Input.GetMouseButtonUp(0)){
        CancelInvoke();
        myPoints = null;
    }

}

function AddPoint(){

   Debug.Log("Add");

    var tempPoints : Vector3[];

    if(!myPoints)
        tempPoints = new Vector3[1];
    else{
        tempPoints = new Vector3[myPoints.Length+1];
       
    for(var j = 0; j < myPoints.Length; j++)
        tempPoints[j] = myPoints[j];
    
   }   
     var tempPos : Vector3 = Input.mousePosition;
    tempPos.z = 10;
    
    tempPoints[j] = camera.ScreenToWorldPoint(tempPos);
   myPoints = new Vector3[tempPoints.Length];
   for(j=0; j< myPoints.Length; j++) 
   myPoints[j] = tempPoints[j];
}

NOTICE: it seems to be a little sluggish.