Experiment in casting boxes as rays for unity in javascript. Collision Detection Game Dev

Unity JavaScript 'RayBox' Ray Casting experiment

var tName;
// center
public var center : Vector2;
var centerX : float;
var centerY : float;
var height : float;
var halfHeight : float;
var width : float;

var rayLength : float = .1;
var rayWidth : float = .01;

var left : float;
var right : float;
var top : float;
var bottom : float;

var hitBoxHit : boolean;

var topLeftHit : boolean = false;
var topRightHit : boolean = false;

var rightTopHit : boolean = false;
var rightBottomHit : boolean = false;

var bottomRightHit : boolean = false;
var bottomLeftHit : boolean = false;

var leftBottomHit : boolean = false;
var leftTopHit : boolean = false;

var player : GameObject;

var Vert : Vector2;
var Hori : Vector2;


function Start () {
  Vert = Vector2.up;
  Hori = Vector2.right;
}


function drawBox(width: float, height: float, top: float, right: float, bottom: float, left: float, color){
  Debug.DrawRay (Vector2(left , bottom), Hori * width, color); // top line
  Debug.DrawRay (Vector2(right , top), Vert * height, color); // right line
  Debug.DrawRay (Vector2(left , top), Hori * width, color); //bottom line
  Debug.DrawRay (Vector2(left , top), Vert * height, color); // right line
}



function hitBox(other : GameObject, top : float, right : float, bottom : float, left : float, width : float, height : float, color){

  var otherCenter : Vector2 = other.transform.renderer.bounds.center;
  var otherCenteright : float = otherCenter.x;
  var otherCenterY : float = otherCenter.y;
  var otherHeight : float = other.transform.renderer.bounds.size.y;
  var otherHalfHeight : float = otherHeight/2;
  var otherWidth : float = other.transform.renderer.bounds.size.x;
  var otherHalfWidth: float = otherWidth/2;

  var otherLeft: float = otherCenteright - otherHalfWidth;
  var otherRight: float = otherCenteright + otherHalfWidth;
  var otherTop: float = otherCenterY - otherHalfHeight;
  var otherBottom: float = otherCenterY + otherHalfHeight;

  drawBox( otherWidth, otherHeight, otherTop, otherRight, otherBottom, otherLeft, Color.magenta);


  if (otherLeft < right  && otherRight  > left &&
    otherTop < bottom && otherBottom > top) {
    // The objects are touching
    drawBox(width, height, top, right, bottom, left, Color.red);
    return true;
  }else{
    drawBox(width, height, top, right, bottom, left, color);
    return false;
  }

}// hitBox




function Update () {

// Update all coords of this object
  center = transform.renderer.bounds.center;
  centerX = center.x;
  centerY = center.y;
  tName = transform.name;
  height = transform.renderer.bounds.size.y;
  halfHeight = height/2;
  width = transform.renderer.bounds.size.x;
  halfWidth = width/2;
  
  left = centerX - halfWidth;
  right = centerX + halfWidth;
  top = centerY - halfHeight;
  bottom = centerY + halfHeight;

  // test for all hits
  hitBoxHit = hitBox(player, top, right, bottom, left, width, height, Color.green);

  topLeftHit = hitBox(player, bottom, left+rayWidth , bottom+rayLength, left, rayWidth, rayLength, Color.white);
  topRightHit = hitBox(player, bottom, right, bottom+rayLength, right-rayWidth, rayWidth, rayLength, Color.white);

  rightTopHit = hitBox(player, bottom-rayWidth, right+rayLength, bottom, right, rayLength, rayWidth, Color.white);
  rightBottomHit = hitBox(player, top , left  , top+rayWidth , left-rayLength,  rayLength, rayWidth, Color.white);

  bottomLeftHit = hitBox(player, top-rayLength, left+rayWidth, top, left, rayWidth, rayLength, Color.white);
  bottomRightHit = hitBox(player, top-rayLength, right , top , right-rayWidth, rayWidth, rayLength, Color.white);

  leftTopHit = hitBox(player, bottom-rayWidth, left , bottom, left-rayLength, rayLength, rayWidth,  Color.white);
  leftBottomHit = hitBox(player, top , right+rayLength, top+rayWidth, right ,  rayLength, rayWidth, Color.white);

}// end update



// Ray Syntax : Debug.DrawRay (Vector2(x , y), size, color);