Forked from:: Jareth's forked from: code on 2009-1-9

forked from: forked from: code on 2009-1-9

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modified : 2009-12-07 06:29:58

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// forked from Jareth's forked from: code on 2009-1-9
// forked from Metrix's code on 2009-1-9
// Author: Richard Owen
// Based on some code i saw along time ago and can not find now to reference
// Move your mouse around the stage and check out the water trail
// this works well as rain drops if you want to randomly drop points onto the surface
//
// Known Isuues: THe water

// write as3 code here..
package 
{

import flash.display.DisplayObject;
	import flash.display.Shape;
	import flash.display.SimpleButton;
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.MouseEvent;
	import flash.utils.getDefinitionByName;
	import flash.utils.setInterval;
	import flash.utils.clearInterval;
	
	public class temp extends Sprite 
	{
		private var Water:WaterMaterial;

private var intervalID:uint = 0;

public function temp():void 
		{
			trace(1);
			if (stage) init();
			else addEventListener(Event.ADDED_TO_STAGE, init);
			trace(2);
		}
		
		private function init(e:Event = null):void 
		{

removeEventListener(Event.ADDED_TO_STAGE, init);
	
			
			Water = new WaterMaterial();
			stage.addChild(Water);
	
			Water.addEventListener(MouseEvent.MOUSE_DOWN, MouseClicky)
			Water.addEventListener(MouseEvent.MOUSE_UP, MouseRelease)
			Water.addEventListener(MouseEvent.MOUSE_MOVE, MouseMove)

intervalID = setInterval(WaterUpdate, 50);

}
		
		private function MouseClicky(event:MouseEvent):void {
			Water.setDrop(event.localX, event.localY);
		};
		
		private function MouseMove(event:MouseEvent):void {
			Water.setDrop(event.localX, event.localY);
		};

public function WaterUpdate():void { 
			Water.forceRefresh();
		}
		
		private function MouseRelease(event:MouseEvent):void {
			//clearInterval(intervalID);
		};

}
}
	import flash.display.Bitmap;
	import flash.display.BitmapData;
	import flash.display.InteractiveObject;
	import flash.geom.Rectangle;
	import flash.display.Sprite;
	import flash.events.Event;

class WaterMaterial extends Sprite
	{
		private const TestScale:Number = 5.0;
		private const BufWidth:uint = 93;	
		private const BufHeight:uint = 93;
		private const MaxHeight:uint = 256;
		
		private const damping:Number = 0.90;
		
		private var Buffer1:Array = new Array(BufWidth);
		private var Buffer2:Array = new Array(BufWidth);
		private var tempBuff:Array;
		
		private var waterData:BitmapData;
		private var waterMap:Bitmap;
		
		public function WaterMaterial() 
		{
			addEventListener(Event.ADDED_TO_STAGE, init);
		}
		
		public function init(e:Event): void {
			removeEventListener(Event.ADDED_TO_STAGE, init);
			
			//init code goes here
			
			waterData = new BitmapData(BufWidth, BufHeight, true, 0x00000000);
			waterMap = new Bitmap(waterData);
			addChild(waterMap);
			
			this.x = 0;
			this.y = 0;
			this.width = BufWidth * TestScale;
			this.height = BufHeight * TestScale;
			
			var col:int;
			var row:int;
			for (col = 0; col < BufWidth ; col++ ) {
  			    Buffer1[col] = new Array(BufHeight);
				for (row = 0; row < BufHeight; row++) {
					Buffer1[col][row] = 0;
				}
			}	
			for (col = 0; col < BufWidth ; col++ ) {
  			    Buffer2[col] = new Array(BufHeight);
				for (row = 0; row < BufHeight; row++) {
					Buffer2[col][row] = 0;
				}
			}	
			
		}
		
		public function setDrop(dropX:uint, dropY:uint):void {
			var col:int;
			var row:int;
			
  			Buffer1[dropX][dropY] = MaxHeight;

for (col = dropX - 1; col < dropX + 1; col++)
			  for (row = dropY - 1; row < dropY + 1; row++) {
  			    //Buffer1[col][row] = MaxHeight
			  }
		}
				
		public function updateRipple():void {

var col:int;
			var row:int;
			var pixelColor:uint;
			
			for (col = 1; col < BufWidth - 2; col++ ) {
				for (row = 1; row < BufHeight - 2; row++) {
					var oldVal:uint = Buffer2[col][row];
					
					Buffer2[col][row] = ((Buffer1[col - 1][row] + 
					                      Buffer1[col + 1][row] + 
										  Buffer1[col][row + 1] + 
										  Buffer1[col][row - 1] +
										  Buffer1[col - 1][row - 1] +
										  Buffer1[col - 1][row + 1] +
										  Buffer1[col + 1][row - 1] +
										  Buffer1[col + 1][row + 1]  ) / 4) - oldVal;
					
					
										  
					var newVal:int = Buffer2[col][row];
					
					Buffer2[col][row] = Math.floor(newVal * damping);
					
					
					
					if (Buffer2[col][row] < 0) Buffer2[col][row] = 0;

//if (Buffer2[col][row] > MaxHeight) Buffer2[col][row] = MaxHeight;
					pixelColor = Buffer2[col][row] << 24;
					pixelColor = pixelColor + 0xff;
					waterData.setPixel32(col + 1, row + 1, pixelColor);
				}
			}
		}
		
		public function forceRefresh(): void {
			
			//Time the update
			updateRipple();
			
			var col:int;
			var row:int;
			var pixelColor:uint;
			
			waterData.lock();
			
			
			for (col = 0; col < BufWidth ; col++ ) {
				for (row = 0; row < BufHeight; row++) {			
					pixelColor = Buffer2[col][row];

}
			}
			
			for (col = 0; col < 2 ; col++ ) {
				for (row = 0; row < 2; row++) {			
				}
			}
			
			
			waterData.unlock();
			
			tempBuff = Buffer2;
			Buffer2 = Buffer1;
			Buffer1 = tempBuff;
		}
	}

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