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标题: flash 3d基础学习 [打印本页]

作者: yeu1233 时间: 2012-8-31 08:43
标题: flash 3d基础学习
  3d图形在原有的平面x,y的基础上加入深度z轴，使用几何***法重新计算物体x,y坐标。
坐标系统
flash 3d中默认使用右手坐标系统，x坐标从左到右，y坐标从上到下，z从外到里指向屏幕.

例子,首先创建一个ball类。

package
{
import flash.display.ColorCorrection;
import flash.display.Sprite;

/**
   *  @author:Gaara
   *  2012-3-5
   *
   **/
public class Ball extends Sprite
{
      public function Ball(x:Number,y:Number,z:Number,color:int=0x00FF00,radius:Number=5)
      {
         super();

         this._x = x;
         this._y = y;
         this._z = z;

         graphics.beginFill(color);
         graphics.drawCircle(0,0,radius);
         graphics.endFill();
      }

      public var _x:Number;
      public var _y:Number;
      public var _z:Number;
}
}

创建主类

package
{
import flash.display.Sprite;
import flash.events.Event;

/**
   *  @author:Gaara
   *  2012-3-5
   *
   **/
[SWF(width="800", height="600" ,frameRate="12", backgroundColor="#000000")]
public class TestCos extends Sprite
{
      /** 绘制小球  **/
      private var ballVec:Vector.<Ball> = new Vector.<Ball>;

      /**观察者与屏幕距离  **/
      private const D:Number = 200;

      /**旋转角度  **/
      private var angelT:Number = 0.001;

      private var radian:Number = angelT * 180 /Math.PI;

      private var vpX:Number = 100;
      private var vpY:Number = -50;

      public function TestCos()
      {

         this.x = stage.stageWidth / 2;
         this.y = stage.stageHeight / 2;

         var ball0:Ball = new Ball(100,100,0);
         var ball1:Ball = new Ball(0,100,0);
         var ball2:Ball = new Ball(0,0,0);
         var ball3:Ball = new Ball(100,0,0);
         var ball4:Ball = new Ball(100,100,100,0xFF0000);
         var ball5:Ball = new Ball(0,100,100,0xFF0000);
         var ball6:Ball = new Ball(0,0,100,0xFF0000);
         var ball7:Ball = new Ball(100,0,100,0xFF0000);

         ballVec.push(ball0);
         ballVec.push(ball1);
         ballVec.push(ball2);
         ballVec.push(ball3);
         ballVec.push(ball4);
         ballVec.push(ball5);
         ballVec.push(ball6);
         ballVec.push(ball7);

         for each (var ball:Ball in ballVec)
         {
            addChild(ball);
         }

         this.addEventListener(Event.ENTER_FRAME,onAdd);
      }

      protected function onAdd(event:Event):void
      {
         for each (var ball:Ball in ballVec)
         {
            var _x:Number = ball._x*Math.cos(radian) - ball._y*Math.sin(radian);
            var _y:Number = ball._y*Math.cos(radian) + ball._x*Math.sin(radian);

            ball._x = _x ;
            ball._y = _y ;

            var myRadio:Number = D/(D + ball._z);
            var pX:Number = (_x - vpX) * myRadio;
            var pY:Number = (_y - vpY) * myRadio;
            ball.x = vpX + pX;
            ball.y = vpY + pY;

            trace("myRadio:" + myRadio+" px:" + pX +" py:" + pY);
            ball.scaleX = ball.scaleY =  myRadio;

            ball.alpha = 100 * myRadio;
         }
      }
}
}

作者: kikkik7000 时间: 2014-7-10 12:06
thank you!

作者: . 时间: 2014-10-21 22:12

作者: spencergong 时间: 2014-11-22 10:21
你更详细呀很好

作者: 790044454 时间: 2018-11-25 20:21
谢谢分享

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