forked from: Metaball
@Original code Info
*
* from Proce55ing
* Metaball Demo Effect
* by luis2048.
@update onmyownlife.com transplanted to flash.
// forked from onmyownlife's Metaball
package
{
import flash.display.*;
import flash.events.*;
import flash.geom.Point;
/**
* @Original code Info
*
* from Proce55ing
* Metaball Demo Effect
* by luis2048.
*
* @update onmyownlife.com transplanted to flash.
*/
public class Metaball extends Sprite
{
public static const STAGE_W:uint = 470;
public static const STAGE_H:uint = 470;
public static var stage:Stage;
public static const TOTAL_BALL_COUNT:uint=4;
public static const BT_WIDTH:uint=20;
public static const BT_HEIGHT:uint=20;
private var bitmapData:BitmapData;
private var bitmap:Bitmap;
private var balls_ary:Array;
private var count:uint;
public function Metaball(){init();}
private function init():void {
Metaball.stage=this.stage;
balls_ary = [];
for (var i:uint = 0; i < TOTAL_BALL_COUNT; i++ ) {
var ball:Ball = new Ball(new Point(random1(), random1()),
new Point(int(random(1,BT_WIDTH)) , int(random(1,BT_HEIGHT))));
balls_ary.push(ball);
}
bitmapData = new BitmapData(BT_WIDTH, BT_HEIGHT, false, 0x000000);
bitmap = new Bitmap(bitmapData, "auto", true);
addChild(bitmap);
width = STAGE_W;
height = STAGE_H;
addEventListener(Event.ENTER_FRAME , update);
stage.addEventListener(MouseEvent.MOUSE_UP , onMouseUp);
count=uint(Math.random()*10);
bomb();
}
private function onMouseUp(evt:MouseEvent):void {
count++;
bomb();
}
private function bomb():void {
for (var i:uint = 0; i < TOTAL_BALL_COUNT; i++ ) balls_ary[i].bomb();
}
private function update(evt:Event):void {
for (var i:uint = 0; i < TOTAL_BALL_COUNT ; i++ ) balls_ary[i].update();
render();
}
private function render():void {
bitmapData.lock();
for (var y:uint = 0; y < BT_HEIGHT; y++ ) {
for (var x:uint = 0; x < BT_WIDTH; x++ ) {
var pixelsValue:int = 0;
for (var i:uint = 0; i < TOTAL_BALL_COUNT; i++ ) {
var ball:Ball = balls_ary[i];
pixelsValue += ball.currentRadius / (1 + ball.getPixelValue(x, y));
}
bitmapData.setPixel(x, y, convertRGBColor(pixelsValue));
}
}
bitmapData.unlock();
}
private function convertRGBColor(pixelsValue:int):Number {
var rgb:int;
switch(count% 6) {
case 0: rgb = getRGB(0, pixelsValue/2 , pixelsValue); break;
case 1: rgb = getRGB( pixelsValue, pixelsValue / 2, 0); break;
case 2: rgb = getRGB( pixelsValue, pixelsValue/3, pixelsValue/2); break;
case 3: rgb = getRGB( pixelsValue/2, pixelsValue*0.8, pixelsValue/5); break;
case 4: rgb = getRGB( pixelsValue*0.8, pixelsValue/4, pixelsValue/7); break;
case 5: rgb = getRGB(pixelsValue/6, pixelsValue/3 , pixelsValue*0.8); break;
}
return rgb;
}
public static function shuffle(ary:Array):Array {
var i :uint= ary.length;
while (i--) {
var j :uint= Math.floor(Math.random()*(i+1));
var t :*= ary[i];
ary[i] = ary[j];
ary[j] = t;
}
return ary;
}
public static function getRGB(red : uint , green : uint , blue :uint):uint {
return (Math.min(red, 255)<<16 | Math.min(green, 255)<< 8 | Math.min(blue, 255));
}
public static function random(min:Number , max:Number):Number {
if (max == min) {
return max;
}else if (max < min) {
var _temp: Number = max;
max = min;
min = _temp;
}
return Math.random() * (max - min) + min;
}
public static function random1(pct:Number = .5):int {
return Math.random() < pct?1: -1;
}
public static function getPoint():Point {
return new Point(Metaball.BT_WIDTH * ( Metaball.stage.mouseX / Metaball.STAGE_W), Metaball.BT_HEIGHT * Metaball.stage.mouseY / Metaball.STAGE_H);
}
}
}
import flash.geom.Point;
class Ball {
public var pixelX_ary:Array;
public var pixelY_ary:Array;
public var velocity:Point;
public var position:Point;
public var friction:Point;
public var maxRadius:uint;
public var currentRadius:uint;
public function Ball(vel:Point , pos:Point) {
velocity = vel;
position = pos;
reset();
}
public function update():void {
currentRadius += (maxRadius - currentRadius) / 10;
position=position.add(velocity);
velocity=velocity.subtract(friction);
checkBorderline();
setPixels();
}
private function checkBorderline():void {
if (position.y > (Metaball.BT_HEIGHT + 10)) {
reset();
velocity.y = 1;
position.y = -10;
}else if (position.y < -10) {
reset();
velocity.y = -1;
position.y = Metaball.BT_HEIGHT + 10;
}
if (position.x > (Metaball.BT_WIDTH+ 10)) {
reset();
position.x = -10;
velocity.x = 1;
}else if (position.x < -10) {
reset();
position.x = Metaball.BT_WIDTH + 10;
velocity.x = -1;
}
}
private function reset():void {
friction=new Point(Metaball.random1() * Math.random() / 50 , Metaball.random1() * Math.random() / 50);
currentRadius = Metaball.random( 5, 100);
maxRadius = uint(Metaball.random(30000, 60000));
}
public function bomb():void {
reset();
position = Metaball.getPoint();
}
private function setPixels():void {
pixelX_ary = [];
pixelY_ary = [];
for (var y:uint = 0; y < Metaball.BT_HEIGHT; y++ ) pixelY_ary[y] = int((position.y - y)*(position.y - y));
for (var x:uint = 0; x < Metaball.BT_WIDTH; x++ ) pixelX_ary[x] = int((position.x - x)*(position.x - x));
}
public function getPixelValue(x:uint , y:uint):Number {return pixelX_ary[x] + pixelY_ary[y];}
}