Anim2D.cs

using UnityEngine;
using System.Collections;

public class Anim2D : MonoBehaviour {
	
	// calculation variables
	private Vector3 tempVector;
	private Vector3 tempVector2;
	private int i;
	
	// animation variables (variables used for processing aniamtion)
	
	public float sheetRows = 5; // Total columns in sprite sheet
	public float sheetColumns = 4; // Total Rows in sprite sheet
	
	public float FrameRate = 11f; // how many frames to play per second
	
	private float frameNum = 1; // the current frame being played,
	private string currentAnim; // the ID of the current animation being played
	private float currentStart = 0; //Dynamic variable that tells the animation system what the first frame of the current animation is 
	private float currentEnd = 0;
	private bool loopCheck; //Does this animation loop?
	private float AnimTime = 0f; // time to pass before playing next animation
	private Vector2 sheetPos; // the X, Y position of the frame
	private Vector2 sheetOffset; // the offset value of the X, Y coordinate for the texture
	
	
	//This Class allows us to create a bunch of data and store it in this specific container
	[System.Serializable]
    public class AnimClass
    {
    public string Name;
	public bool looping;
    public int anim_Min;
	public int anim_Max;
    }

    public AnimClass[] Animz;
	


	
	// Use this for initialization
	void Start () {
	
		//Telling this controller that Idle is the default animation so that it doesn't throw an error
		currentAnim = "Idle";		
	}

		
	void Update () {
		
		HandleAnimation();
		KeyCommands();

	}
	
	void HandleAnimation () // handles all animation
	{

		FindAnimation(currentAnim);
		ProcessAnimation();
			
	}
	
	//Here we decide 
	void FindAnimation (string currentAnim)
	{

		for (var i = 0; i < Animz.Length; i++){										
			if ( Animz[i].Name == currentAnim){
				
				loopCheck = Animz[i].looping;
				currentStart = Animz[i].anim_Min;
				currentEnd = Animz[i].anim_Max;
				
				i = Animz.Length;
			}
		}
	}
	
	//These are dummy key input sensors. You should have a seperate player controller (or AI controller) that declares "currentAnim" to this script
	void KeyCommands(){
		if (Input.GetKeyDown(KeyCode.UpArrow)){
		currentAnim = "Idle";	
		}
		if (Input.GetKeyDown(KeyCode.RightArrow)){
		currentAnim = "Kill";
		}
	}
	
		
	void ProcessAnimation ()
	{
	
		// AnimTime -= Time.deltaTime; subtract the number 
		// of seconds passed since the last frame, if the game 
		// is running at 30 frames per second the variable will 
		// subtract by 0.033 of a second (1/30)
		
		AnimTime -= Time.deltaTime; 
		
		if (AnimTime <= 0)
		{
			frameNum += 1;
			// one play animations (play from start to finish)
			
			frameNum = Mathf.Clamp(frameNum,currentStart,currentEnd+1);
			
			if ( loopCheck == true){
				if (frameNum > currentEnd){
					frameNum = currentStart;
				}
			}
			
			// if the FrameRate is 11, 1/11 is one eleventh of a second, that is the time we are waiting before we
			//play the next frame.
			
			AnimTime += (1/FrameRate); 
		}
		
		sheetPos.y = 0;
		
		// find the number of frames down the animation is and set the y coordinate accordingly
		for (i=(int)frameNum; i > 5; i-=5) 
		{
			sheetPos.y += 1;
		}
		
		sheetPos.x = i - 1; // find the X coordinate of the frame to play
		sheetOffset = new Vector2(1 - (sheetPos.x/sheetRows),1 -(sheetPos.y/sheetColumns)); // find the X and Y coordinate of the frame to display
		
		renderer.material.SetTextureOffset ("_MainTex", sheetOffset); // offset the texture to display the correct frame
	}
	
}