package
  {
          public class @ax-animation-ch17-Point3D
          {
                  public var fl:Number = 250;
                  private var vpX:Number = 0;
                  private var vpY:Number = 0;
                  private var cX:Number = 0;
                  private var cY:Number = 0;
                  private var cZ:Number = 0;
                  public var x:Number = 0;
                  public var y:Number = 0;
                  public var z:Number = 0;
                  
                  public function @ax-animation-ch17-Point3D(x:Number=0, y:Number=0, z:Number=0)
                  {
                          this.x = x;
                          this.y = y;
                          this.z = z;
                  }
                  
                  public function setVanishingPoint(vpX:Number, vpY:Number):void
                  {
                          this.vpX = vpX;
                          this.vpY = vpY;
                  }
                  
                  public function setCenter(cX:Number, cY:Number, cZ:Number=0):void
                  {
                          this.cX = cX;
                          this.cY         = cY;
                          this.cZ = cZ;
                  }
                  
                  public function get screenX():Number
                  {
                          var scale:Number = fl / (fl + z + cZ);
                          return vpX + (cX + x) * scale;
                  }
                  
                  public function get screenY():Number
                  {
                          var scale:Number = fl / (fl + z + cZ);
                          return vpY + (cY + y) * scale;
                  }
                  
                  public function rotateX(angleX:Number):void
                  {
                          var cosX:Number = Math.cos(angleX);
                          var sinX:Number = Math.sin(angleX);
                          
                          var y1:Number = y * cosX - z * sinX;
                          var z1:Number = z * cosX + y * sinX;
                          
                          y = y1;
                          z = z1;
                  }
                  
                  public function rotateY(angleY:Number):void
                  {
                          var cosY:Number = Math.cos(angleY);
                          var sinY:Number = Math.sin(angleY);
                          
                          var x1:Number = x * cosY - z * sinY;
                          var z1:Number = z * cosY + x * sinY;
                          
                          x = x1;
                          z = z1;
                  }
                  
                  public function rotateZ(angleZ:Number):void
                  {
                          var cosZ:Number = Math.cos(angleZ);
                          var sinZ:Number = Math.sin(angleZ);
                          
                          var x1:Number = x * cosZ - y * sinZ;
                          var y1:Number = y * cosZ + x * sinZ;
                          
                          x = x1;
                          y = y1;
                  }
          }
  }