2D Game

New Project - 2D

Title it accordingly

Create folder called Scripts
Create C# Script : Player
Controller2D

Create Folder called Materials
Create Material called Player

Create a GameObject -> 3DObject -> Quad
Remove mesh collider from quad
rename Quad to player
Change the color of material player, assign it to the player

Open up player.cs


using UnityEngine;
using System.Collections;

[RequireComponent (typeof (Controller2D))]
public class Player : MonoBehaviour{

	Controller2D controller;

	void Start(){
		controller = GetComponent<Controller2D> ();
}


Go into Controller2D.cs

using UnityEngine;
using System.Collections;

[RequireComponent (typeof (BoxCollider2D))]
public class Controller2D : MonoBehaviour {
	BoxCollider2D collider;

	void Start(){
		collider = GetComponent<BoxCollider2D>();
	}
}


Apply player script to Player

in Controller.cs

Create a new method

struct RaycastOrigins {
		public Vector2 topLeft, topRight;
		public Vector2 bottomLeft, bottonRight;
}

under BoxCollider2D collider;

RayCastOrigins raycastOrigins;

create another method

void UpdateRaycastOrigins(){
	Bounds bounds = collider.bounds;
	bounds.Expand(skinWidth * -2);

	raycastOrigins.bottomLeft = new Vector2(bounds.min.x, bounds.min.y);
	raycastOrigins.bottomRight = new Vector2(bounds.max.x, bounds.min.y);
	raycastOrigins.topLeft = new Vector2(bounds.min.x, bounds.max.y);
	raycastOrigins.topRight = new Vector2(bounds.max.x, bounds.max.y);

}


Create a global variable

const float skinWidth = .015f;

create two public integers

public int horizontalRayCount = 4;
public int verticalRayCount = 4;

float horizontalRaySpacing;
float verticalRaySpacing;