Flash AS3 3d Fireworks effect implementation code

The code is as follows

Copy Code

Package { Import Flash.display.Bitmap; Import Flash.display.BitmapData; Import Flash.display.Shape; Import Flash.display.Sprite; Import flash.events.Event; Import flash.events.MouseEvent; Import Flash.filters.BlurFilter; Import Flash.geom.ColorTransform; Import Flash.geom.Matrix3D; Import flash.geom.PerspectiveProjection; Import Flash.geom.Point; Import Flash.geom.Utils3D; Import Flash.geom.Vector3D; [SWF (width = 465, height = 465, BackgroundColor = 0x0, framerate = 30)] /** * ... * @author Lizhi */ public class Fireworks3d extends Sprite { private var cm:matrix3d = new Matrix3D (); private var cvm:matrix3d = new Matrix3D (); private var m:matrix3d = new Matrix3D (); private var vm:matrix3d = new Matrix3D (); private var p:perspectiveprojection = new Perspectiveprojection (); private Var Pm:matrix3d; private var vins:vector.<number> = new vector.<number> (); private var vouts:vector.<number> = new vector.<number> (); private var uvts:vector.<number> = new vector.<number> (); private var v2ds:vector.<number> = new vector.<number> (); private var view2:sprite = new Sprite (); private var view:shape = new Shape (); private var bmd:bitmapdata = new BitmapData (465, 465, True, 0); private var particles:array = []; Public Function Fireworks3d () { PM = P.tomatrix3d (); AddEventListener (Event.enter_frame, Render); Stage.addeventlistener (Mouseevent.click, OnClick); AddChild (view); AddChild (New Bitmap (BMD)); view.x = 228; VIEW.Y = 228; } Private Function OnClick (e:event=null): void { Explode ((Math.random () -0.5) *400, (Math.random () -0.5) *400, (Math.random () -0.5) *400, 0xffffff*math.random ()); } private var t:int = 0; Private function Render (e:event): void { if (Math.random () <0.05) { OnClick (); } Cm.identity (); Cm.appendtranslation (0, 200,-550); Cm.appendrotation (VIEW.MOUSEX/10, vector3d.y_axis,cm.position); Cm.appendrotation (-VIEW.MOUSEY/10, vector3d.x_axis,cm.position); Cvm.rawdata = Cm.rawdata; Cvm.invert (); Vm.rawdata = M.rawdata; Vm.append (CVM); View.graphics.clear (); for (var i:int = particles.length-1 i >= 0; i--) { var p:particle = particles[i]; P.VX *= p.deceleration; P.vy *= p.deceleration; P.vz *= p.deceleration; P.vy + = p.gravity; p.position.x = p.position.x + P.VX; P.POSITION.Y = P.position.y + P.vy; P.position.z = p.position.z + p.vz; P.energy *= p.deceleration; if (P.energy < 0.05) { Particles.splice (i, 1); } else { P.vposition = Vm.transformvector (p.position); p.v2d = Utils3d.projectvector (PM, p.vposition); View.graphics.lineStyle (400/P.V2D.W, P.color); View.graphics.moveTo (p.v2d.x, P.V2D.Y); var c:int = 0; var tc:int = 4; for (var j:int = p.tails.length-1 J >= 0; J--, C + +) { if (C&GT;P.ENERGY*TC) { P.tails.splice (J, 1); Continue } var v:vector3d = p.tails[j]; var vp:vector3d = Vm.transformvector (v); var v2d:vector3d = utils3d.projectvector (PM, VP); View.graphics.lineStyle (500/P.V2D.W, P.color, (p.energy*tc-c)/P.ENERGY*TC); View.graphics.lineTo (v2d.x, V2D.Y); } if (P.tails[0]) { v = p.tails[p.tails.length-1]; if (MATH.SQRT (v.x-p.position.x) * (v.x-p.position.x) + (V.Y-P.POSITION.Y) * (V.Y-P.POSITION.Y) + (v.z-p.position.z) * ( V.Z-P.POSITION.Z) >p.length) { P.tails.push (P.position.clone ()); } }else { P.tails.push (P.position.clone ()); } } } Bmd.colortransform (Bmd.rect, New ColorTransform (0.095, 0.095, 0.095, 0.095)); Bmd.applyfilter (BMD, Bmd.rect, New Point, New Blurfilter ()); Bmd.draw (VIEW2); } Private function Explode (X:number, Y:number, Z:number, color:uint): void { var c:int = 400*math.random (); while (c--> 0) { var p:particle = new particle; P.energy = Math.random () * 5; var m:matrix3d = new Matrix3D (); M.appendtranslation (0, 0, (Math.random () *.2+0.8) * 5); M.appendrotation (360 * math.random (), Vector3d.x_axis); M.appendrotation (360 * math.random (), Vector3d.y_axis); var v:vector3d = m.transformvector (new Vector3D); P.VX = v.x; P.vy = V.Y; P.vz = v.z; P.position = new Vector3D (x, y, z); P.color = color; P.deceleration = 0.95; P.gravity = 0.05; P.length = 2; Particles.push (P); } } } } Import Flash.geom.Vector3D; Class Particle { public var tails:array = []; public Var Vx:number; public Var Vy:number; public Var Vz:number; public Var Position:vector3d; public Var Vposition:vector3d; public Var V2d:vector3d; public Var Energy:number; public Var color:uint; public Var Deceleration:number; public Var Gravity:number; public Var Length:number; }