Flash AS3代码打造绚烂的星形变幻效果

这篇教程主要向大家讲解如何利用flash as3代码打造绚烂的星形变幻效果，教程并没有对每一个代码做出讲解，但也不是很难，分享到，喜欢的朋友一起来学习吧！　

复制代码

代码如下:

package
　{
　import flash.display.sprite;
　import flash.events.event;
　import flash.events.mouseevent;
　[swf(backgroundcolor = "0x000000", framerate = "60")]
　public class main extends sprite
　{
　private var patternlist:array = new array();
　private var movebullet:array = new array();
　public function main():void
　{
　if (stage) init();
　else addeventlistener(event.added_to_stage, init);
　}
　private function init(e:event = null):void
　{
　removeeventlistener(event.added_to_stage, init);
　// entry point
　mousedown(null);
　addeventlistener(event.enter_frame, enterframe );
　stage.addeventlistener(mouseevent.mouse_down, mousedown);
　}
　private function enterframe(event:event):void
　{
　var i:int = 0;
　for ( i = 0; i < patternlist.length; i++ )
　{
　var bullet:bullet = patternlist[i].run();
　if ( bullet != null )
　{
　addchild( bullet );
　}
　}
　for ( i = patternlist.length - 1; i >= 0; i-- )
　{
　if ( patternlist[i].isend() )
　{
　// 从待命到移动
　for ( var j:int = 0; j < patternlist[i].waitbullet.length; j++ )
　{
　patternlist[i].waitbullet[j].startslide();
　movebullet.push( patternlist[i].waitbullet[j] );
　}
　patternlist.splice( i, 1 );
　}
　}
　// 移动
　if ( movebullet.length > 0 )
　{
　for ( i = movebullet.length - 1; i >= 0; i-- )
　{
　//
　if ( movebullet[i].slideflag )
　{
　movebullet[i]._xx += math.cos( movebullet[i].slideangle * math.pi / 180 ) * movebullet[i].slidespeed;
　movebullet[i]._xy += math.sin( movebullet[i].slideangle * math.pi / 180 ) * movebullet[i].slidespeed;
　movebullet[i].x = movebullet[i]._xx;
　movebullet[i].y = movebullet[i]._xy;
　if ( movebullet[i].slidespeed > 0 )
　{
　movebullet[i].slidespeed -= movebullet[i].slidespeedmax / 50;
　if ( movebullet[i].slidespeed < 0 ) movebullet[i].slideflag = false;
　}
　}else
　{
　movebullet[i]._xx += math.cos( movebullet[i].moveangle * math.pi / 180 ) * 1;
　movebullet[i]._xy += math.sin( movebullet[i].moveangle * math.pi / 180 ) * 1;
　movebullet[i].x = movebullet[i]._xx;
　movebullet[i].y = movebullet[i]._xy;
　if ( movebullet[i].x < -50 || movebullet[i].x > stage.stagewidth + 50 || movebullet[i].y < -50 || movebullet[i].y > stage.stageheight + 50 )
　{
　removechild( movebullet[i] );
　movebullet.splice( i, 1 );
　}
　}
　}
　}
　}
　private function mousedown(event:mouseevent):void
　{
　// 小星
　patternlist.push( new pattern(stage.stagewidth / 2, stage.stageheight / 2, false, 50, 0xff5555, (270 + 72 * 0), 3 ) );
　patternlist.push( new pattern(stage.stagewidth / 2, stage.stageheight / 2, false, 50, 0xff5555, (270 + 72 * 1), 3 ) );
　patternlist.push( new pattern(stage.stagewidth / 2, stage.stageheight / 2, false, 50, 0xff5555, (270 + 72 * 2), 3 ) );
　patternlist.push( new pattern(stage.stagewidth / 2, stage.stageheight / 2, false, 50, 0xff5555, (270 + 72 * 3), 3 ) );
　patternlist.push( new pattern(stage.stagewidth / 2, stage.stageheight / 2, false, 50, 0xff5555, (270 + 72 * 4), 3 ) );
　// 大星
　patternlist.push( new pattern(stage.stagewidth/2, stage.stageheight/2, false, 100, 0x5555ff, (270 + 72 * 0), 5 ) );
　patternlist.push( new pattern(stage.stagewidth/2, stage.stageheight/2, false, 100, 0x5555ff, (270 + 72 * 1), 5 ) );
　patternlist.push( new pattern(stage.stagewidth/2, stage.stageheight/2, false, 100, 0x5555ff, (270 + 72 * 2), 5 ) );
　patternlist.push( new pattern(stage.stagewidth/2, stage.stageheight/2, false, 100, 0x5555ff, (270 + 72 * 3), 5 ) );
　patternlist.push( new pattern(stage.stagewidth/2, stage.stageheight/2, false, 100, 0x5555ff, (270 + 72 * 4), 5 ) );
　}
　}
　}
　//////////////////////////////////////////////////////////////////////
　//////////////////////////////////////////////////////////////////////
　import flash.display.sprite;
　import flash.geom.point;
　//-----------------------------
　// 图案类
　class pattern {
　private var reverse:boolean = false;
　private var starsize:number = 150;
　private var bulletcolor:uint = 0x000000;
　private var slideangle:number = 0;
　private var slidespeed:number = 0;
　private var end:boolean = false;
　private var count:int = 0;
　private var defx:int = 0;
　private var defy:int = 0;
　private var target:array = new array();
　private static const path_obj_num:int = 20; // 子弹数
　private static const target_num:int = 5;
　private static const target_angle:array = [ 270 + 72 * 3, 270 + 72 * 1, 270 + 72 * 4, 270 + 72 * 2, 270 ]; // 通过的目标地点的角度
　private static const target_angle2:array = [ 270 + 72 * 2, 270 + 72 * 4, 270 + 72 * 1, 270 + 72 * 3, 270 ]; //
　public var waitbullet:array = new array();
　public function pattern(
　_gx:int = 0, _gy:int = 0,
　_rev:boolean = false,
　_starsize:number = 80,
　_bulletcolor:uint = 0x000000,
　_slideangle:number = 0,
　_slidespeed:number = 0
　) {
　count = 0;
　defx = _gx;
　defy = _gy;
　reverse = _rev;
　starsize = _starsize;
　bulletcolor = _bulletcolor;
　slideangle = _slideangle;
　slidespeed = _slidespeed;
　for ( var i:int = 0; i < 5; i++ )
　{
　var angle:number = target_angle[i];
　if ( reverse ) angle = target_angle2[i] + 180; // 反転
　else angle = target_angle[i];
　target[i] = new point( math.cos( angle * math.pi / 180 ) * starsize, math.sin( angle * math.pi / 180 ) * starsize );
　}
　}
　//子弹生成
　public function run() : bullet {
　var bullet:bullet = new bullet(bulletcolor,slideangle,slidespeed);
　var targetno:int = int(count / path_obj_num);
　var targetrate:int = int(count % path_obj_num);
　var p:point;
　//子弹的座标
　p = point.interpolate( target[targetno], target[(targetno+(target_num-1))%target_num], targetrate / path_obj_num );
　bullet.x = p.x + defx;
　bullet.y = p.y + defy;
　bullet._xx = p.x + defx;
　bullet._xy = p.y + defy;
　//子弹的移动角度
　//if( !reverse ) bullet.moveangle = -count / path_obj_num / target_num * 720 + 135;
　//else bullet.moveangle = count / path_obj_num / target_num * 720 - 135;
　bullet.moveangle = ( -int(count / path_obj_num) / target_num * 720 + 108) + ((count % path_obj_num) * 180 / path_obj_num); // target始点角度 + 180 * rate グレイソーに入る前の奴
　waitbullet.push( bullet );
　count++;
　if ( count == target_num * path_obj_num ) end = true;
　return bullet;
　}
　public function isend() : boolean { return end; }
　}
　//-----------------------------
　// 子弹类
　class bullet extends sprite {
　public var slideflag:boolean = false;
　public var slideangle:number = 0;
　public var slidespeed:number = 0;
　public var slidespeedmax:number = 0;
　public var moveangle:number = 0;
　public var _xx:number = 0;
　public var _xy:number = 0;
　public function bullet(color:uint,_slideangle:number = 0,_slidespeed:number = 50) {
　super();
　graphics.beginfill(color);
　graphics.drawcircle(0, 0, 5);
　graphics.endfill();
　graphics.beginfill(0xffffff, 0.5);
　graphics.drawcircle(0, 0, 3);
　graphics.endfill();
　slideangle = _slideangle;
　slidespeed = _slidespeed;
　slidespeedmax = _slidespeed;
　slideflag = false;
　}
　public function startslide():void
　{
　slideflag = true;
　}
　}

以上就是flash as3代码打造绚烂的星形变幻效果的方法介绍，希望能帮到大家，谢谢阅读！