Animating Tiled texture - Extended

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Author: Joachim Ante - Extended by TomLong74
== Description ==
This script extends the capabilities of the original AnimatedTexureUV.js.
This allows many animation skins or animation states to be stored in the same texture.
They can be updated at run time to play the new skin or new animation state via SetSpriteAnimation();
== Usage ==
Attach this script to the object that has a material with the animation cell-sheet texture.
From your other script call this script's SetSpriteAnimation() function with the new parameters.
colCount, - the total number of columns in the animation cell-sheet
rowCount, - the total number of rows in the  animation cell-sheet
rowNumber,- the row where this animation will start
colNumber,- the column where this animation will start
totalCells, - the number of cells in this animation
fps - the number of cells (frames) per second the animation will play
== Example ==
Example function call: SetSpriteAnimation(4,4,1,0,4,12);
Should animate the 4 green cells starting with the left
most cell and at a speed of 12 cells per second.
== JavaScript - AnimatedTextureExtendedUV.js ==
//vars for the whole sheet
var colCount : int =  4;
var rowCount : int =  4;
//vars for animation
var rowNumber : int =  0; //Zero Indexed
var colNumber : int =  0; //Zero Indexed
var totalCells : int =  4;
var fps : int = 10;
var offset : Vector2;  //Maybe this should be a private var
function Update () { SetSpriteAnimation(colCount,rowCount,rowNumber,colNumber,totalCells,fps);  }
function SetSpriteAnimation(colCount : int,rowCount : int,rowNumber : int,colNumber : int,totalCells : int,fps : int){
// Calculate index
var index : int = Time.time * fps;
// Repeat when exhausting all cells
index = index % totalCells;
// Size of every cell
var size = Vector2 (1.0 / colCount, 1.0 / rowCount);
// split into horizontal and vertical index
var uIndex = index % colCount;
var vIndex = index / colCount;
// build offset
// v coordinate is the bottom of the image in opengl so we need to invert.
offset = Vector2 ((uIndex+colNumber) * size.x, (1.0 - size.y) - (vIndex+rowNumber) * size.y);
renderer.material.SetTextureOffset ("_MainTex", offset);
renderer.material.SetTextureScale  ("_MainTex", size);

Revision as of 18:02, 19 October 2009

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