lighting test
/**
* Copyright yonatan ( http://wonderfl.net/user/yonatan )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/ymd5
*/
package {
import flash.display.*;
import flash.events.*;
import flash.geom.*;
import flash.utils.*;
import flash.net.*;
import com.bit101.components.*;
import org.si.sion.utils.soundloader.*;
[SWF(width="465", height="465", frameRate="60", backgroundColor="0")]
public class main extends Sprite {
private const LINE_WIDTH_FACTOR:Number = 0.5;
private const BRANCH_SCALE:Number = 0.74;
private const VS:int = 350; // viewport size
private const HVS:int = VS/2;
private const SS:int = 465; // stage size
private const HSS:int = SS/2;
private const INIT_SIZE:Number = 120;
// Minimal Gradient Editor (SWF素材) - http://wonderfl.net/c/6i8T
private var GRADIENT_EDITOR_URL:String = "http://swf.wonderfl.net/swf/usercode/2/2c/2c1a/2c1a167b1a4db168e952e96df4e3d642544eb624.swf";
private var sigl:SiGLCore = new SiGLCore(VS, VS);
private var cbDrawAll:CheckBox;
private var camSpeed:Number = 3;
private var cam:SiGLMatrix = new SiGLMatrix;
private var lastFrameTime:int = 0;
private var minThickness:Number = 2;
private var targetFPS:int = 24;
private var maskAlpha:Number = 1;
private var mt:Label;
private var vl:VolumetricPointLight;
private var intensity:Number = 2;
private var light:Vector3D = new Vector3D;
private var container:Sprite = new Sprite;
private var mge:*;
private var lockOnSun:Boolean = false;
public function main() {
// GRADIENT_EDITOR_URL = "mge.swf"
stage.quality = "medium";
stage.scaleMode = "noScale";
x = y = HSS;
stage.addChild(container);
var loader:SoundLoader = new SoundLoader();
loader.setURL(new URLRequest(GRADIENT_EDITOR_URL), "mge", null, true);
loader.addEventListener(Event.COMPLETE, onLoaded);
loader.loadAll();
}
private function onLoaded(e:Event):void {
vl = new VolumetricPointLight(VS, VS, this, [0xffffff, 0xffffff, 0xffcc88, 0x884422], [1, 1, 0.8, 0], [0, 4, 5, 120]);
vl.scale = 2;
vl.intensity = 2;
vl.colorIntegrity = true;
vl.setBufferSize(0x1000);
vl.startRendering();
container.addChild(vl);
light.x = 0;
light.y = -20000;
light.z = -100000;
var MGE:Class = SoundLoader(e.target).hash["mge"].getClass();
mge = new MGE(stage, 5, 36, "light gradient:", {color: vl._colors, alpha: vl._alphas, ratio: vl._ratios});
//sigl.fieldOfView = 45;
addEventListener("enterFrame", onEnterFrame);
var uix:int = 5, uiy:int = 0;
// var uix:int = -HSS+5, uiy:int = -HSS+5;
var that:main = this;
function _slider(txt:String, obj:Object, prop:String, min:Number, max:Number, val:Number):void {
var s:HUISlider = new HUISlider(that.stage, uix, uiy, txt, function(e:Event):void { obj[prop] = e.target.value; });
s.minimum = min; s.maximum = max; obj[prop] = s.value = val; uiy += 18;
}
function _cb(txt:String, obj:Object, prop:String, val:Boolean):void {
var s:CheckBox = new CheckBox(that.stage, uix, uiy+3, txt, function(e:Event):void { obj[prop] = e.target.selected; });
obj[prop] = s.selected = val; uiy += 18;
}
// cbDrawAll = new CheckBox(this, uix, uiy, "Draw all computed branches (incl. clipped ones)"); uiy += 18;
_slider("Target FPS", this, "targetFPS", 6, 40, targetFPS);
// _slider("Mask alpha", "maskAlpha", 0, 1, 1);
_slider("cam speed", this, "camSpeed", 0.1, 10, camSpeed);
uiy=0; uix=190;
_slider("light intensity", this, "intensity", 0.5, 10, vl.intensity);
_slider("light scale", vl, "scale", 1, 4, vl.scale);
_cb("colorIntegrity", vl, "colorIntegrity", vl.colorIntegrity);
uiy = 36; uix = 300;
_cb("lock cam on sun", this, "lockOnSun", false);
new FPSMeter(stage, SS-100, 0);
mt = new Label(stage, SS-100, 18);
}
private function onEnterFrame(e:Event):void {
var t:int = getTimer();
var renderTime:int = t - lastFrameTime;
lastFrameTime = t;
var timeDiff:Number = Math.abs(renderTime - 1000/targetFPS);
if(timeDiff > 300/targetFPS) { // don't adjust unless we have to (reduces flicker)
minThickness += (renderTime > 1000/targetFPS) ? 0.1 : -0.1;
if(minThickness < 1) minThickness = 1;
}
mt.text = "Min. thickness: " + minThickness.toFixed(2);
graphics.clear();
var cx:Number = Math.sin(t/(56789/camSpeed)) * 1550;
var cz:Number = Math.cos(t/(45678/camSpeed)) * 1550;
var cy:Number = Math.cos(t/(34567/camSpeed)) * 500 - 500;
var tw:Number = lockOnSun ? 1 : 0.5+0.5*Math.cos(t/(27890/camSpeed));
var twp:Number = Math.pow(tw, 6);
var tx:Number = light.x * twp;
var ty:Number = light.y * twp + (-INIT_SIZE/BRANCH_SCALE) * (1-twp);
var tz:Number = light.z * twp;
cy = cy * (1-tw) + tw * -INIT_SIZE;
cam.id().prependTranslation(cx, cy, cz);
cam.lookAt(cx,cy,cz, tx,ty,tz, 0,1,0, 1);
sigl.setCameraMatrix(cam);
for(var x:int = -4800; x <= 4800; x += 300) {
for(var z:int = -4800; z <= 4800; z += 300) {
sigl.push().t(x, 0, z).r(x+z, Vector3D.Y_AXIS);
render(INIT_SIZE);
sigl.pop();
}
}
var pl:Vector3D = new Vector3D;
sigl.projectionMatrix.transform(light, pl);
pl.w = pl.z/sigl.focalLength;
pl.x /= pl.w;
pl.y /= pl.w;
vl.srcX = pl.x + HSS;
vl.srcY = pl.y + HSS;
//vl.intensity = (pl.z > 0 && pl.x > -SS && pl.x < SS && pl.y > -SS && pl.y < SS) ? 2 : 0;
vl.intensity = Math.min(intensity, Math.min(pl.z, Math.abs(pl.x - VS), Math.abs(pl.y - VS)) / 100);
if(vl.intensity < 0) vl.intensity = 0;
vl.emission.visible = vl.intensity > 0;
container.graphics.clear();
container.graphics.lineStyle();
container.graphics.beginFill(0x8497b4);//0x4488cc);//0xffeedd, maskAlpha);
container.graphics.drawRect(0, 0, VS, VS);
container.graphics.endFill();
//container.scrollRect = new Rectangle(0, 0, VS, VS);
this.x = this.y = HVS;//HSS-(SS-VS);
container.x = container.y = HSS-HVS;
}
private var p1:Vector3D = new Vector3D, p2:Vector3D = new Vector3D;
private function render(size:Number):void {
function projxy(v:Vector3D):void {
sigl.projectionMatrix.transform(sigl.matrix.position, v);
v.w = v.z/sigl.focalLength;
v.x /= v.w;
v.y /= v.w;
// v.project();
}
sigl.push();
projxy(p1);
var limit:Number = size / (1 - BRANCH_SCALE);
var xl:Number = HVS+limit*2/p1.w; // why *2 ???
var yl:Number = HVS+limit*2/p1.w;
if(p1.z > sigl.zNear-limit
&& p1.x > -xl && p1.x < xl
&& p1.y > -yl && p1.y < yl
) {
size *= BRANCH_SCALE;
sigl.t(0, -size, 0);
projxy(p2);
var thickness:Number = size * LINE_WIDTH_FACTOR / ((p1.w+p2.w)*0.5);
// crude clipping
var cs:Number = HVS + thickness * 0.5;
var isClipped:Boolean = (p1.x < -cs && p2.x < -cs) || (p1.x > cs && p2.x > cs) || (p1.y < -cs && p2.y < -cs) || (p1.y > cs && p2.y > cs) || p1.z < 0 || p2.z < 0;
if(thickness > minThickness) {
if((cbDrawAll && cbDrawAll.selected) || !isClipped) {
graphics.lineStyle(thickness, 0, (thickness-minThickness), false, "normal", "none");
graphics.moveTo(p1.x, p1.y);
graphics.lineTo(p2.x, p2.y);
}
sigl.r(120, Vector3D.Y_AXIS).r(-30, Vector3D.X_AXIS);
render(size);
sigl.r(70, Vector3D.X_AXIS);
render(size);
}
}
sigl.pop();
}
}
}
import flash.display.*;
import flash.events.*;
import flash.filters.*;
import flash.geom.*;
// useful stuff by keim_at_Si (i think i copied it from the boolean crystals demo)
// modifications:
// - dest arg in SiGLMatrix transform() function
// - reuse objects on SiGLMatrix stack in push, pop, rem (rem might be broken now)
// - focalLength, zNear, zFar getters in SiGLCore
/** SiGLCore provides basic matrix operations. */
class SiGLCore {
// variables ----------------------------------------
public var modelViewMatrix:SiGLMatrix = new SiGLMatrix(), projectionMatrix:SiGLMatrix = new SiGLMatrix();
public var viewWidth:Number, viewHeight:Number, pointSpriteFieldScale:Point = new Point();
public var defaultCameraMatrix:SiGLMatrix = new SiGLMatrix(), matrix:SiGLMatrix = modelViewMatrix;
private var _mvpMatrix:SiGLMatrix = new SiGLMatrix(), _mvpdir:Boolean, _2d:Number, _2r:Number;
private var _mag:Number, _zNear:Number, _zFar:Number, _fieldOfView:Number, _fl:Number, _alignTopLeft:Boolean = false;
// properties ----------------------------------------
public function get modelViewProjectionMatrix() : SiGLMatrix {
if (_mvpdir) {
_mvpMatrix.copyFrom(projectionMatrix);
_mvpMatrix.prepend(modelViewMatrix);
_mvpdir = false;
}
return _mvpMatrix;
}
public function get focalLength() : Number { return _fl; }
public function get zNear() : Number { return _zNear; }
public function get zFar() : Number { return _zFar; }
public function get align() : String { return (_alignTopLeft) ? "topLeft" : "center"; }
public function set align(mode:String) : void { _alignTopLeft = (mode == "topLeft"); _updateProjectionMatrix(); }
public function get matrixMode() : String { return (matrix === projectionMatrix) ? "projection" : "modelView"; }
public function set matrixMode(mode:String) : void { matrix = (mode == "projection") ? projectionMatrix : modelViewMatrix; }
public function get angleMode() : String { return (_2r == 1) ? "radian" : "degree"; }
public function set angleMode(mode:String) : void { _2d = (mode == "radian") ? 57.29577951308232 : 1; _2r = (mode == "radian") ? 1 : 0.017453292519943295; }
public function get fieldOfView() : Number { return _fieldOfView / _2r; }
public function set fieldOfView(fov:Number) : void { _fieldOfView = fov * _2r; _updateProjectionMatrix(); }
public function get magnification() : Number { return _mag; }
public function set magnification(mag:Number) : void { _mag = mag; _updateProjectionMatrix(); }
// constructor ----------------------------------------
function SiGLCore(width:Number=1, height:Number=1) {
viewWidth = width; viewHeight = height;
angleMode = "degree"; _mag = 1;
_zNear = -1000; _zFar = 200;
modelViewMatrix.identity();
_mvpdir = true;
this.fieldOfView = 60;
}
// matrix operations ----------------------------------------
public function forceUpdateMatrix() : SiGLCore { _mvpdir = true; return this; }
public function setZRange(zNear:Number=-100, zFar:Number=100) : SiGLCore { _zNear = zNear; _zFar = zFar; _updateProjectionMatrix(); return this; }
public function clear() : SiGLCore { matrix.clear(); _mvpdir = true; return this; }
public function id() : SiGLCore { matrix.id(); _mvpdir = true; return this; }
public function push() : SiGLCore { matrix.push(); return this; }
public function pop() : SiGLCore { matrix.pop(); _mvpdir = true; return this; }
public function rem() : SiGLCore { matrix.rem(); _mvpdir = true; return this; }
public function r(a:Number, axis:Vector3D, pivot:Vector3D = null) : SiGLCore { matrix.prependRotation(a*_2d, axis, pivot); matrix._invdir = _mvpdir = true; return this; }
public function s(x:Number, y:Number, z:Number=1) : SiGLCore { matrix.prependScale(x, y, z); matrix._invdir = _mvpdir = true; return this; }
public function t(x:Number, y:Number, z:Number=0) : SiGLCore { matrix.prependTranslation(x, y, z); matrix._invdir = _mvpdir = true; return this; }
public function m(mat:Matrix3D) : SiGLCore { matrix.prepend(mat); matrix._invdir = _mvpdir = true; return this; }
public function re(x:Number, y:Number, z:Number) : SiGLCore { matrix.prependRotationXYZ(x*_2r, y*_2r, z*_2r); _mvpdir = true; return this; }
public function setCameraMatrix(mat:Matrix3D=null) : SiGLCore { projectionMatrix.rem().prepend(mat || defaultCameraMatrix); _mvpdir = true; return this; }
private function _updateProjectionMatrix() : void {
var wh:Number = viewWidth / viewHeight, rev:Number = (_alignTopLeft)?-1:1;
_fl = (viewHeight * 0.5) / Math.tan(_fieldOfView * 0.5);
if (_zNear <= -_fl) _zNear = -_fl + 0.001;
projectionMatrix.clear().perspectiveFieldOfView(_fieldOfView, wh, _zNear+_fl, _zFar+_fl, -1);
pointSpriteFieldScale.setTo(projectionMatrix.rawData[0] * _fl, projectionMatrix.rawData[5] * _fl);
projectionMatrix.push();
defaultCameraMatrix.identity();
defaultCameraMatrix.prependTranslation(0, 0, -_fl);
if (_alignTopLeft) defaultCameraMatrix.prependTranslation(viewWidth* 0.5, -viewHeight * 0.5, 0);
defaultCameraMatrix.prependScale(_mag, _mag * rev, _mag * rev);
setCameraMatrix();
}
}
/** SiGLMatrix is extention of Matrix3D with push/pop operation */
class SiGLMatrix extends Matrix3D {
internal var _top:int = 0, _invdir:Boolean = false, _inv:Matrix3D = new Matrix3D(), _stac:Vector.<Matrix3D> = new Vector.<Matrix3D>();
static private var _tv:Vector.<Number> = new Vector.<Number>(16, true), _tm:Matrix3D = new Matrix3D();
static private var _in:Vector.<Number> = new Vector.<Number>(4, true), _out:Vector.<Number> = new Vector.<Number>(4, true);
public function get inverted() : Matrix3D { if (_invdir) { _inv.copyFrom(this); _inv.invert(); _invdir = false; } return _inv; }
public function forceUpdateInvertedMatrix() : SiGLMatrix { _invdir=true; return this; }
public function clear() : SiGLMatrix { _top = 0; return id(); }
public function id() : SiGLMatrix { identity(); _inv.identity(); return this; }
public function push() : SiGLMatrix {
if(_stac.length == _top) _stac.push(new Matrix3D());
_stac[_top++].copyFrom(this);
return this;
}
public function pop() : SiGLMatrix {
this.copyFrom(_stac[--_top]);
_invdir=true;
return this;
}
public function rem() : SiGLMatrix { this.copyFrom(_stac[_top-1]); _invdir=true; return this; }
public function prependRotationXYZ(rx:Number, ry:Number, rz:Number) : SiGLMatrix {
var sx:Number = Math.sin(rx), sy:Number = Math.sin(ry), sz:Number = Math.sin(rz),
cx:Number = Math.cos(rx), cy:Number = Math.cos(ry), cz:Number = Math.cos(rz);
_tv[0] = cz*cy; _tv[1] = sz*cy; _tv[2] = -sy; _tv[4] = -sz*cx+cz*sy*sx; _tv[5] = cz*cx+sz*sy*sx;
_tv[6] = cy*sx; _tv[8] = sz*sx+cz*sy*cx; _tv[9] = -cz*sx+sz*sy*cx;
_tv[10] = cy*cx; _tv[14] = _tv[13] = _tv[12] = _tv[11] = _tv[7] = _tv[3] = 0; _tv[15] = 1;
_tm.copyRawDataFrom(_tv); prepend(_tm); _invdir=true;
return this;
}
public function lookAt(cx:Number, cy:Number, cz:Number, tx:Number=0, ty:Number=0, tz:Number=0, ux:Number=0, uy:Number=1, uz:Number=0, w:Number=0) : SiGLMatrix {
var dx:Number=tx-cx, dy:Number=ty-cy, dz:Number=tz-cz, dl:Number=-1/Math.sqrt(dx*dx+dy*dy+dz*dz),
rx:Number=dy*uz-dz*uy, ry:Number=dz*ux-dx*uz, rz:Number=dx*uy-dy*ux, rl:Number= 1/Math.sqrt(rx*rx+ry*ry+rz*rz);
_tv[0] = (rx*=rl); _tv[4] = (ry*=rl); _tv[8] = (rz*=rl); _tv[12] = -(cx*rx+cy*ry+cz*rz) * w;
_tv[2] = (dx*=dl); _tv[6] = (dy*=dl); _tv[10] = (dz*=dl); _tv[14] = -(cx*dx+cy*dy+cz*dz) * w;
_tv[1] = (ux=dy*rz-dz*ry); _tv[5] = (uy=dz*rx-dx*rz); _tv[9] = (uz=dx*ry-dy*rx); _tv[13] = -(cx*ux+cy*uy+cz*uz) * w;
_tv[3] = _tv[7] = _tv[11] = 0; _tv[15] = 1; copyRawDataFrom(_tv); _invdir=true;
return this;
}
public function perspectiveFieldOfView(fieldOfViewY:Number, aspectRatio:Number, zNear:Number, zFar:Number, lh:Number=1.0) : void {
var yScale:Number = 1.0 / Math.tan(fieldOfViewY * 0.5), xScale:Number = yScale / aspectRatio;
this.copyRawDataFrom(Vector.<Number>([xScale,0,0,0,0,yScale,0,0,0,0,zFar/(zFar-zNear)*lh,lh,0,0,(zNear*zFar)/(zNear-zFar),0]));
}
public function transform(vector:Vector3D, dest:Vector3D = null) : Vector3D {
if(!dest) dest = vector;
_in[0] = vector.x; _in[1] = vector.y; _in[2] = vector.z; _in[3] = vector.w;
transformVectors(_in, _out); dest.setTo(_out[0], _out[1], _out[2]); dest.w = _out[3];
return dest;
}
}
// volumetrics ------------------------------------------------------------------------------
class EffectContainer extends Sprite {
public var blur:Boolean = false;
public var colorIntegrity:Boolean = false;
public var intensity:Number = 4;
public var passes:uint = 6;
public var rasterQuality:String = null;
public var scale:Number = 2;
public var smoothing:Boolean = true;
public var srcX:Number;
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;
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;
}
public function setViewportSize(width:uint, height:uint):void {
_viewportWidth = width;
_viewportHeight = height;
scrollRect = new Rectangle(0, 0, width, height);
_updateBuffers();
}
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);
}
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;
}
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);
}
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);
}
public function startRendering():void {
addEventListener(Event.ENTER_FRAME, render);
}
public function stopRendering():void {
removeEventListener(Event.ENTER_FRAME, render);
}
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;
}
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;
}
}
class VolumetricPointLight extends EffectContainer {
public var _colors:Array;
public var _alphas:Array;
public 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;
public function get emission():DisplayObject { return _emission; }
public function VolumetricPointLight(width:uint, height:uint, occlusion:DisplayObject, colorOrGradient:*, alphas:Array = null, ratios:Array = null) {
if(colorOrGradient is Array) {
_colors = colorOrGradient.concat();
_ratios = ratios || _colors.map(function(item:*, i:int, arr:Array):int { return 0x100*i/(colorOrGradient.length+i-1) });
_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);
}
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);
}
}
override protected function _updateBuffers():void {
super._updateBuffers();
_gradientLoResBmd = new BitmapData(_bufferWidth, _bufferHeight, false, 0);
_gradientLoResDirty = true;
}
override public function setViewportSize(width:uint, height:uint):void {
super.setViewportSize(width, height);
_drawGradient();
_gradientLoResDirty = true;
}
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);
}
override public function dispose():void {
super.dispose();
if(_gradientLoResBmd) _gradientLoResBmd.dispose();
_gradientLoResBmd = null;
}
}