forked from: FireTest
//////////////////////////////////////////////////////////////////////////////
[AS3.0] Fireクラスに挑戦！ (1)
http://www.project-nya.jp/modules/weblog/details.php?blog_id=950
//////////////////////////////////////////////////////////////////////////////
/**
* Copyright Mark ( http://wonderfl.net/user/Mark )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/sn8x
*/
// forked from ProjectNya's FireTest
////////////////////////////////////////////////////////////////////////////////
// [AS3.0] Fireクラスに挑戦！ (1)
// http://www.project-nya.jp/modules/weblog/details.php?blog_id=950
////////////////////////////////////////////////////////////////////////////////
package {
import flash.display.Sprite;
import flash.events.MouseEvent;
[SWF(backgroundColor="#000000", width="465", height="465", frameRate="30")]
public class Main extends Sprite {
private var fire:Fire;
private var fired:Boolean = true;
public function Main() {
init();
}
private function init():void {
graphics.beginFill(0x000000);
graphics.drawRect(0, 0, 465, 465);
graphics.endFill();
fire = new Fire();
addChild(fire);
fire.init(80, 200, {x: 232, y: 340, offset: 10});
fire.burn();
stage.addEventListener(MouseEvent.CLICK, click, false, 0, true);
}
private function click(vet:MouseEvent):void {
fired = !fired;
if (fired) fire.burn();
else fire.clear();
}
}
}
import flash.display.Sprite;
import flash.display.Shape;
import flash.display.BitmapData;
import flash.display.Bitmap;
import flash.geom.Matrix;
import flash.display.GradientType;
import flash.display.SpreadMethod;
import flash.display.InterpolationMethod;
import flash.display.BlendMode;
import flash.filters.BlurFilter;
import flash.filters.DisplacementMapFilter;
import flash.filters.DisplacementMapFilterMode;
import flash.geom.Point;
import flash.events.Event;
class Fire extends Sprite {
private var xPos:uint;
private var yPos:uint;
private var fireWidth:uint;
private var fireHeight:uint;
private var noise:Sprite;
private var noiseBD:BitmapData;
private var light:Shape;
private var lightOffset:uint;
private var flare:Sprite;
private var flareBase:Sprite;
private var fire:Shape;
private var flareBD:BitmapData;
private var baseMask:Shape;
private var fireMask:Shape;
private var map:DisplacementMapFilter;
private static var baseX:uint = 12;
private static var baseY:uint = 24;
private static var numOctaves:uint = 3;
private var randomSeed:uint;
private var speedList:Array;
private static var speed:uint = 2;
private var offsetsList:Array;
private var scale:Number = 0;
public function Fire() {
}
public function init(w:uint, h:uint, option:Object):void {
fireWidth = w;
fireHeight = h;
if (option.x != undefined) xPos = option.x;
if (option.y != undefined) yPos = option.y;
if (option.offset != undefined) lightOffset = option.offset;
initialize();
}
private function initialize():void {
createPerlinNoise(fireWidth, fireHeight);
if (lightOffset) createLight();
createFlare(fireWidth, fireHeight);
}
private function createPerlinNoise(w:uint, h:uint):void {
noise = new Sprite();
addChild(noise);
noise.visible = false;
noiseBD = new BitmapData(w + 40, h + 40, true);
noise.addChild(new Bitmap(noiseBD));
}
private function createLight():void {
light = new Shape();
addChild(light);
light.visible = false;
light.x = xPos;
light.y = yPos + lightOffset;
createGradientLight(light);
}
private function createFlare(w:uint, h:uint):void {
flare = new Sprite();
addChild(flare);
flare.visible = false;
flare.x = xPos;
flare.y = yPos;
flare.blendMode = BlendMode.ADD;
var blur:BlurFilter = new BlurFilter(16, 16, 3);
baseMask = new Shape();
addChild(baseMask);
baseMask.x = xPos;
baseMask.y = yPos - fireHeight*0.1;
baseMask.scaleX = baseMask.scaleY = 2;
createEggMask(baseMask);
flare.mask = baseMask;
baseMask.filters = [blur];
flare.cacheAsBitmap = true;
baseMask.cacheAsBitmap = true;
flareBase = new Sprite();
flare.addChild(flareBase);
fire = new Shape();
flareBase.addChild(fire);
createGradientFire(fire);
fireMask = new Shape();
flareBase.addChild(fireMask);
createEggMask(fireMask);
fireMask.filters = [blur];
fire.mask = fireMask;
fire.cacheAsBitmap = true;
fireMask.cacheAsBitmap = true;
flareBD = new BitmapData(w + 40, h + 40, true);
randomSeed = Math.floor(Math.random()*100);
speedList = new Array();
offsetsList = new Array();
for (var n:uint = 0; n < numOctaves; n++) {
var xSpeed:Number = Math.random()*speed - speed*0.5;
var ySpeed:Number = Math.random()*speed + speed*3;
speedList[n] = new Point(xSpeed, ySpeed);
offsetsList[n] = new Point(0, 0);
}
}
public function burn():void {
flare.visible = true;
addEventListener(Event.ENTER_FRAME, createFire, false, 0, true);
fireMask.scaleX = fireMask.scaleY = scale;
light.visible = true;
light.scaleX = light.scaleY = scale;
removeEventListener(Event.ENTER_FRAME, clearFire);
addEventListener(Event.ENTER_FRAME, burnFire, false, 0, true);
}
private function burnFire(evt:Event):void {
scale += (1 - scale)*0.2;
fireMask.scaleX = fireMask.scaleY = scale;
light.scaleX = light.scaleY = scale;
if (Math.abs(1 - scale) < 0.005) {
scale = 1;
removeEventListener(Event.ENTER_FRAME, burnFire);
}
}
public function clear():void {
removeEventListener(Event.ENTER_FRAME, burnFire);
addEventListener(Event.ENTER_FRAME, clearFire, false, 0, true);
}
private function clearFire(evt:Event):void {
scale += (0 - scale)*0.2;
fireMask.scaleX = fireMask.scaleY = scale;
light.scaleX = light.scaleY = scale;
if (Math.abs(0 - scale) < 0.005) {
scale = 0;
light.visible = false;
removeEventListener(Event.ENTER_FRAME, createFire);
removeEventListener(Event.ENTER_FRAME, clearFire);
}
}
private function createFire(evt:Event):void {
for (var n:uint = 0; n < numOctaves; n++) {
offsetsList[n].x += speedList[n].x;
offsetsList[n].y += speedList[n].y;
}
noiseBD.lock();
noiseBD.perlinNoise(baseX, baseY, numOctaves, randomSeed, false, true, 1, true, offsetsList);
noiseBD.unlock();
flareBD.lock();
flareBD.draw(noise);
var point:Point = new Point(0, 0);
map = new DisplacementMapFilter(flareBD, point, 1, 1, -10, 90, DisplacementMapFilterMode.CLAMP, 0xFFFFFF);
flareBD.unlock();
flareBase.filters = [map];
}
private function createGradientFire(target:Shape):void {
var w:uint = fireWidth + 40;
var h:uint = fireHeight + 40;
var colors:Array = [0xFF0000, 0x990000, 0xFF9900, 0xFFFF66, 0xFFFFFF, 0xFFFFFF];
var alphas:Array = [1, 1, 1, 1, 1, 1];
var ratios:Array = [25, 51, 127, 204, 229, 255];
var matrix:Matrix = new Matrix();
matrix.createGradientBox(w, -h, -0.5*Math.PI, 0, 0);
target.graphics.beginGradientFill(GradientType.LINEAR, colors, alphas, ratios, matrix, SpreadMethod.PAD, InterpolationMethod.RGB, 0.75);
target.graphics.drawRect(-w*0.5, -h+20, w, h);
target.graphics.endFill();
}
private function createEggMask(target:Shape):void {
var w:Number = fireWidth;
var h:Number = fireHeight;
target.graphics.beginFill(0xFFFFFF);
target.graphics.moveTo(-w*0.5, -h*0.2);
target.graphics.curveTo(-w*0.4, -h, 0, -h);
target.graphics.curveTo(w*0.4, -h, w*0.5, -h*0.2);
target.graphics.curveTo(w*0.5, 0, 0, 0);
target.graphics.curveTo(-w*0.5, 0, -w*0.5, -h*0.2);
target.graphics.endFill();
}
private function createGradientLight(target:Shape):void {
var colors:Array = [0xFFFF00, 0xFFFF00, 0xFFCC00, 0x000000];
var alphas:Array = [0.6, 0.3, 0.2, 0];
var ratios:Array = [0, 102, 153, 255];
var matrix:Matrix = new Matrix();
var w:Number = fireWidth*1.6;
var h:Number = fireWidth*0.4;
matrix.createGradientBox(w, h, 0, -w*0.5, -h*0.5);
target.graphics.beginGradientFill(GradientType.RADIAL, colors, alphas, ratios, matrix, SpreadMethod.PAD, InterpolationMethod.RGB, 0);
target.graphics.drawEllipse(-w*0.5, -h*0.5, w, h);
target.graphics.endFill();
}
}