/**
* Copyright dongseop.kim ( http://wonderfl.net/user/dongseop.kim )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/dQLz
*/
// forked from yonatan's just some horses
// forked from yonatan's CMLMovieClipTexture
package {
import flash.display.*;
import flash.events.*;
import flash.filters.*;
import flash.geom.*;
import flash.net.*;
import flash.system.*;
[SWF(width="465", height="465", frameRate="24", backgroundColor="0xc0c0c0")]
public class FlashTest extends Sprite {
private var horses:Array = [];
private var frameCnt:int = 0;
public static const FOCUS:Number = 300;
public static const MAX_Z:Number = 4000;
public static const MIN_Z:Number = 20;
public static const NUM_HORSES:int = 40;
private var occ:Sprite = new Sprite;
private var vol:VolumetricPointLight;
public function FlashTest() {
var url:String = "http://assets.wonderfl.net/images/related_images/d/d5/d5ef/d5efb19c4e6af524be0c935a932a653b475d2200";
var loader:Loader = new Loader;
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onLoad);
loader.load(new URLRequest(url), new LoaderContext(true));
}
private function onLoad(e:Event):void {
var bmd:BitmapData = Bitmap(e.target.content).bitmapData;
var vmargin:int = 10;
var hmargin:int = 40;
var w:int = bmd.width / 4 - hmargin*2;
var h:int = bmd.height / 3 - vmargin*2;
var rect:Rectangle = new Rectangle(0, 0, w, h);
var frame:BitmapData;
for(var y:int=0; y<3; y++) {
for(var x:int=0; x<4; x++) {
frame = new BitmapData(w, h, true, 0);
rect.x = x*bmd.width/4+hmargin;
rect.y = y*bmd.height/3+vmargin;
frame.copyPixels(bmd, rect, frame.rect.topLeft);
Horse.animation.push(frame);
}
}
Horse.animation.pop(); // lose last frame
for each(frame in Horse.animation) createAlpha(frame);
for(var i:int=0; i<NUM_HORSES; i++) {
var horse:Horse = new Horse;
var z:Number = MAX_Z - (MAX_Z-MIN_Z)/NUM_HORSES*i;
horse.scaleX = horse.scaleY = 1/(z/FOCUS);
horse.y = 210-50/(z/FOCUS);
horse.x = Math.random()*465;
horse.frame = Math.random() * Horse.animation.length*2;
horses.push(horse);
var blury:Number = Math.abs(z - (MIN_Z + MAX_Z)*0.3) / 1000;
var blurx:Number = blury * horse.scaleX * 8;
horse.filters = [new BlurFilter(blurx, blury)];
if(i<NUM_HORSES-3) {
occ.addChild(horse);
} else {
addChild(horse);
}
}
occ.graphics.beginGradientFill("linear",[14731661,16365684,15116397,13341025,10843990],[0,1,1,1,1],[115,121,142,177,255],new Matrix(0.0000,0.2838,-0.2838,0.0000,232.5400,232.5400),"reflect","rgb",0);
occ.graphics.drawRect(0, 0, 465, 465);
occ.graphics.endFill();
vol = new VolumetricPointLight(465, 465, occ, [0xc0b0a0, 0x6080ff, 0x6080ff], [1, 0, 1], [0, 1, 2]);
vol.srcX = 100;
vol.srcY = 200;
vol.scale = 4;
vol.intensity = 0.5;
vol.colorIntegrity = true;
vol.startRendering();
addChildAt(vol, 0);
addEventListener("enterFrame", onEnterFrame);
}
private function createAlpha(bmd:BitmapData):void {
for(var x:int=0; x<bmd.width; x++) {
for(var y:int=0; y<bmd.height; y++) {
var c:uint = bmd.getPixel(x, y);
var match:Number = (
Math.abs(0xb0 - (c & 0xff)) +
Math.abs(0xb0 - ((c >> 8) & 0xff)) +
Math.abs(0xb0 - ((c >> 16) & 0xff)));
match /= (3*0xb0);
match += 0.3;
match = Math.min(1, Math.pow(match, 5));
bmd.setPixel32(x, y, c | ((match*0xff) << 24));
}
}
}
private var bmp:Bitmap = new Bitmap;
private function onEnterFrame(e:Event):void {
for each(var horse:Horse in horses) horse.update();
}
}
}
import flash.display.*;
class Horse extends Bitmap {
public static var animation:Array = [];
public var frame:int;
public function update():void {
bitmapData = animation[frame>>1];
x += 0.5*(width * (0.15 + (0.6+0.4*Math.cos(frame/22*Math.PI+1.6))*0.1));
if(x > 465) x = -465 - width;
if(++frame == 22) frame = 0;
}
}
import flash.display.*;
import flash.events.*;
import flash.filters.*;
import flash.geom.*;
/**
* The EffectContainer class creates a volumetric light effect (also known as crepuscular or "god" rays).
* This is done in 2D with some bitmap processing of an emission object, and optionally an occlusion object.
*/
class EffectContainer extends Sprite {
/**
* When true a blur filter is applied to the final effect bitmap (can help when colorIntegrity == true).
*/
public var blur:Boolean = false;
/**
* Selects rendering method; when set to true colors won't be distorted and performance will be
* a little worse. Also, this might make the final output appear grainier.
*/
public var colorIntegrity:Boolean = false;
/**
* Light intensity.
*/
public var intensity:Number = 4;
/**
* Number of passes applied to buffer. Lower numbers mean lower quality but better performance,
* anything above 8 is probably overkill.
*/
public var passes:uint = 6;
/**
* Set this to one of the StageQuality constants to use this quality level when drawing bitmaps, or to
* null to use the current stage quality. Mileage may vary on different platforms and player versions.
* I think it should only be used when stage.quality is LOW (set this to BEST to get reasonable results).
*/
public var rasterQuality:String = null;
/**
* Final scale of emission. Should always be more than 1.
*/
public var scale:Number = 2;
/**
* Smooth scaling of the effect's final output bitmap.
*/
public var smoothing:Boolean = true;
/**
* Light source x.
* @default viewport center (set in constructor).
*/
public var srcX:Number;
/**
* Light source y.
* @default viewport center (set in constructor).
*/
public var srcY:Number;
protected var _blurFilter:BlurFilter = new BlurFilter(2, 2);
protected var _emission:DisplayObject;
protected var _occlusion:DisplayObject;
protected var _ct:ColorTransform = new ColorTransform;
protected var _halve:ColorTransform = new ColorTransform(0.5, 0.5, 0.5);
protected var _occlusionLoResBmd:BitmapData;
protected var _occlusionLoResBmp:Bitmap;
protected var _baseBmd:BitmapData;
protected var _bufferBmd:BitmapData;
protected var _lightBmp:Bitmap = new Bitmap;
protected var _bufferSize:uint = 0x8000;
protected var _bufferWidth:uint;
protected var _bufferHeight:uint;
protected var _viewportWidth:uint;
protected var _viewportHeight:uint;
protected var _mtx:Matrix = new Matrix;
/**
* Creates a new effect container.
*
* @param width Viewport width in pixels.
* @param height Viewport height in pixels.
* @param emission A DisplayObject to which the effect will be applied. This object will be
* added as a child of the container. When applying the effect the object's filters and color
* transform are ignored, if you want to use filters or a color transform put your content in
* another object and addChild it to this one instead.
* @param occlusion An optional occlusion object, handled the same way as the emission object.
*/
public function EffectContainer(width:uint, height:uint, emission:DisplayObject, occlusion:DisplayObject = null) {
if(!emission) throw(new Error("emission DisplayObject must not be null."));
addChild(_emission = emission);
if(occlusion) addChild(_occlusion = occlusion);
setViewportSize(width, height);
_lightBmp.blendMode = BlendMode.ADD;
addChild(_lightBmp);
srcX = width / 2;
srcY = height / 2;
}
/**
* Sets the container's size. This method recreates internal buffers (slow), do not call this on
* every frame.
*
* @param width Viewport width in pixels
* @param height Viewport height in pixels
*/
public function setViewportSize(width:uint, height:uint):void {
_viewportWidth = width;
_viewportHeight = height;
scrollRect = new Rectangle(0, 0, width, height);
_updateBuffers();
}
/**
* Sets the approximate size (in pixels) of the effect's internal buffers. Smaller number means lower
* quality and better performance. This method recreates internal buffers (slow), do not call this on
* every frame.
*
* @param size Buffer size in pixels
*/
public function setBufferSize(size:uint):void {
_bufferSize = size;
_updateBuffers();
}
protected function _updateBuffers():void {
var aspect:Number = _viewportWidth / _viewportHeight;
_bufferHeight = Math.max(1, Math.sqrt(_bufferSize / aspect));
_bufferWidth = Math.max(1, _bufferHeight * aspect);
dispose();
_baseBmd = new BitmapData(_bufferWidth, _bufferHeight, false, 0);
_bufferBmd = new BitmapData(_bufferWidth, _bufferHeight, false, 0);
_occlusionLoResBmd = new BitmapData(_bufferWidth, _bufferHeight, true, 0);
_occlusionLoResBmp = new Bitmap(_occlusionLoResBmd);
}
/**
* Render a single frame.
*
* @param e In case you want to make this an event listener.
*/
public function render(e:Event = null):void {
if(!(_lightBmp.visible = intensity > 0)) return;
var savedQuality:String = stage.quality;
if(rasterQuality) stage.quality = rasterQuality;
var mul:Number = colorIntegrity ? intensity : intensity/(1<<passes);
_ct.redMultiplier = _ct.greenMultiplier = _ct.blueMultiplier = mul;
_drawLoResEmission();
if(_occlusion) _eraseLoResOcclusion();
if(rasterQuality) stage.quality = savedQuality;
var s:Number = 1 + (scale-1) / (1 << passes);
var tx:Number = srcX/_viewportWidth*_bufferWidth;
var ty:Number = srcY/_viewportHeight*_bufferHeight;
_mtx.identity();
_mtx.translate(-tx, -ty);
_mtx.scale(s, s);
_mtx.translate(tx, ty);
_lightBmp.bitmapData = _applyEffect(_baseBmd, _bufferBmd, _mtx, passes);
_lightBmp.width = _viewportWidth;
_lightBmp.height = _viewportHeight;
_lightBmp.smoothing = smoothing;
}
/**
* Draws a scaled-down emission on _baseBmd.
*/
protected function _drawLoResEmission():void {
_copyMatrix(_emission.transform.matrix, _mtx);
_mtx.scale(_bufferWidth / _viewportWidth, _bufferHeight / _viewportHeight);
_baseBmd.fillRect(_baseBmd.rect, 0);
_baseBmd.draw(_emission, _mtx, colorIntegrity ? null : _ct);
}
/**
* Draws a scaled-down occlusion on _occlusionLoResBmd and erases it from _baseBmd.
*/
protected function _eraseLoResOcclusion():void {
_occlusionLoResBmd.fillRect(_occlusionLoResBmd.rect, 0);
_copyMatrix(_occlusion.transform.matrix, _mtx);
_mtx.scale(_bufferWidth / _viewportWidth, _bufferHeight / _viewportHeight);
_occlusionLoResBmd.draw(_occlusion, _mtx);
_baseBmd.draw(_occlusionLoResBmp, null, null, BlendMode.ERASE);
}
/**
* Render the effect on every frame until stopRendering is called.
*/
public function startRendering():void {
addEventListener(Event.ENTER_FRAME, render);
}
/**
* Stop rendering on every frame.
*/
public function stopRendering():void {
removeEventListener(Event.ENTER_FRAME, render);
}
/**
* Low-level workhorse, applies the lighting effect to a bitmap. This function modifies the src and buffer
* bitmaps and its mtx argument.
*
* @param src The BitmapData to apply the effect on.
* @param buffer Another BitmapData object for temporary storage. Must be the same size as src.
* @param mtx Effect matrix.
* @param passes Number of passes to make.
* @return A processed BitmapData object (supplied in either src or buffer) with final effect output.
*/
protected function _applyEffect(src:BitmapData, buffer:BitmapData, mtx:Matrix, passes:uint):BitmapData {
var tmp:BitmapData;
while(passes--) {
if(colorIntegrity) src.colorTransform(src.rect, _halve);
buffer.copyPixels(src, src.rect, src.rect.topLeft);
buffer.draw(src, mtx, null, BlendMode.ADD, null, true);
mtx.concat(mtx);
tmp = src; src = buffer; buffer = tmp;
}
if(colorIntegrity) src.colorTransform(src.rect, _ct);
if(blur) src.applyFilter(src, src.rect, src.rect.topLeft, _blurFilter);
return src;
}
/**
* Dispose of all intermediate buffers. After calling this the EffectContainer object will be unusable.
*/
public function dispose():void {
if(_baseBmd) _baseBmd.dispose();
if(_occlusionLoResBmd) _occlusionLoResBmd.dispose();
if(_bufferBmd) _bufferBmd.dispose();
_baseBmd = _occlusionLoResBmd = _bufferBmd = _lightBmp.bitmapData = null;
}
protected function _copyMatrix(src:Matrix, dst:Matrix):void {
dst.a = src.a;
dst.b = src.b;
dst.c = src.c;
dst.d = src.d;
dst.tx = src.tx;
dst.ty = src.ty;
}
}
/**
* VolumetricPointLight creates a simple effect container with a gradient emission pattern.
* The gradient's center is automatically moved to the (srcX, srcY) coordinates
* and it's radius is adjusted to the length of the viewport's diagonal, so if you
* set srcX and srcY to the viewport's center then only half of the gradient colors
* will be used.
*
* <p>This should also perform a little better than EffectContainer.</p>
*/
class VolumetricPointLight extends EffectContainer {
protected var _colors:Array;
protected var _alphas:Array;
protected var _ratios:Array;
protected var _gradient:Shape = new Shape;
protected var _gradientMtx:Matrix = new Matrix;
protected var _gradientBmp:Bitmap = new Bitmap;
protected var _lastSrcX:Number;
protected var _lastSrcY:Number;
protected var _lastIntensity:Number;
protected var _lastColorIntegrity:Boolean = false;
protected var _gradientLoResBmd:BitmapData;
protected var _gradientLoResDirty:Boolean = true;
/**
* Creates a new effect container, with an emission created from the supplied color or gradient.
* The constructor lets you use a shortcut syntax for creating simple single-color gradients.
* @example The shortcut syntax:
* <listing>new VolumetricPointLight(800, 600, occlusion, 0xc08040);</listing>
* @example is equivalent to:
* <listing>new VolumetricPointLight(800, 600, occlusion, [0xc08040, 0], [1, 1], [0, 255]);</listing>
*
* @param width Viewport width in pixels.
* @param height Viewport height in pixels.
* @param occlusion An occlusion object, will be overlayed above the lighting gradient and under the light effect bitmap.
* @param colorOrGradient Either a gradient colors array, or a uint color value.
* @param alphas Will only be used if colorOrGradient is an array. This will be passed to beginGradientFill.
* If not provided alphas will all be 1.
* @param ratios Will only be used if colorOrGradient is an array. This will be passed to
* beginGradientFill. If colorOrGradient is an Array and ratios aren't provided default
* ones will be created automatically.
*/
public function VolumetricPointLight(width:uint, height:uint, occlusion:DisplayObject, colorOrGradient:*, alphas:Array = null, ratios:Array = null) {
if(colorOrGradient is Array) {
_colors = colorOrGradient.concat();
if(!ratios) _ratios = colorOrGradient.map(function(item:*, i:int, arr:Array):int { return 0x100*i/(colorOrGradient.length+i-1) });
if(!alphas) _alphas = _colors.map(function(..._):Number { return 1 });
} else {
_colors = [colorOrGradient, 0];
_ratios = [0, 255];
}
super(width, height, _gradientBmp, occlusion);
if(!occlusion) throw(new Error("An occlusion DisplayObject must be provided."));
if(!(colorOrGradient is Array || colorOrGradient is uint)) throw(new Error("colorOrGradient must be either an Array or a uint."));
}
protected function _drawGradient():void {
var size:Number = 2 * Math.sqrt(_viewportWidth*_viewportWidth + _viewportHeight*_viewportHeight);
_gradientMtx.createGradientBox(size, size, 0, -size/2 + srcX, -size/2 + srcY);
_gradient.graphics.clear();
_gradient.graphics.beginGradientFill(GradientType.RADIAL, _colors, _alphas, _ratios, _gradientMtx);
_gradient.graphics.drawRect(0, 0, _viewportWidth, _viewportHeight);
_gradient.graphics.endFill();
if(_gradientBmp.bitmapData) _gradientBmp.bitmapData.dispose();
_gradientBmp.bitmapData = new BitmapData(_viewportWidth, _viewportHeight, true, 0);
_gradientBmp.bitmapData.draw(_gradient);
}
/**
* Updates the lo-res gradient bitmap if neccesary and copies it to _baseBmd.
*/
override protected function _drawLoResEmission():void {
if(_gradientLoResDirty) {
super._drawLoResEmission();
_gradientLoResBmd.copyPixels(_baseBmd, _baseBmd.rect, _baseBmd.rect.topLeft);
_gradientLoResDirty = false;
} else {
_baseBmd.copyPixels(_gradientLoResBmd, _baseBmd.rect, _baseBmd.rect.topLeft);
}
}
/** @inheritDoc */
override protected function _updateBuffers():void {
super._updateBuffers();
_gradientLoResBmd = new BitmapData(_bufferWidth, _bufferHeight, false, 0);
_gradientLoResDirty = true;
}
/** @inheritDoc */
override public function setViewportSize(width:uint, height:uint):void {
super.setViewportSize(width, height);
_drawGradient();
_gradientLoResDirty = true;
}
/** @inheritDoc */
override public function render(e:Event = null):void {
var srcChanged:Boolean = _lastSrcX != srcX || _lastSrcY != srcY;
if(srcChanged) _drawGradient();
_gradientLoResDirty ||= srcChanged;
_gradientLoResDirty ||= (!colorIntegrity && (_lastIntensity != intensity));
_gradientLoResDirty ||= (_lastColorIntegrity != colorIntegrity);
_lastSrcX = srcX;
_lastSrcY = srcY;
_lastIntensity = intensity;
_lastColorIntegrity = colorIntegrity;
super.render(e);
}
/** @inheritDoc */
override public function dispose():void {
super.dispose();
if(_gradientLoResBmd) _gradientLoResBmd.dispose();
_gradientLoResBmd = null;
}
}