topical media & game development
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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#graphic-flex-image-effects-06-Flex-DrawTrianglesTest.ax

#graphic-flex-image-effects-06-Flex-DrawTrianglesTest.ax [swf] [flash] flex 


  package {
  
          import flash.display.TriangleCulling;
          import flash.events.Event;
          import flash.geom.Matrix3D;
          import flash.geom.Vector3D;
  
          [SWF(width=600, height=400, backgroundColor=0x000000)]
Demonstrates the use of drawTriangles(), Matrix3D and Vector3D to render a 3D model. This draws a textured pyramid to the screen and rotates it each frame. 

  
          public class @ax-graphic-flex-image-effects-06-Flex-DrawTrianglesTest extends graphic_flex_image_effects_06_Flex_AbstractImageLoader {
  
                  private var _model:graphic_flex_image_effects_06_Flex_Mesh3D;
                  private var _transform:Matrix3D;
Constructor. Centers sprite, creates model and calls super contructor to load image. 

  
                  public function @ax-graphic-flex-image-effects-06-Flex-DrawTrianglesTest() {
                          x = stage.stageWidth/2;
                          y = stage.stageHeight/2;
                          _model = new graphic_flex_image_effects_06_Flex_PyramidMesh(this);
                          // creates initial 3D transform
                          _transform = new Matrix3D();
                          super("graphic-flex-image-effects-06-assets-bricks.png");
                  }
Method that is called once image loads in super class. This renders the model, then sets up a listener for the ENTER_FRAME event to handle the animation. 

  
                  override protected function runPostImageLoad():void {
                          render();
                          addEventListener(Event.ENTER_FRAME, onSpriteEnterFrame);
                  }
Draws the 3D model to the screen using drawTriangles(). 

  
                  private function render():void {
                          // applies current transform to the model
                          _model.applyTransform(_transform);
                          graphics.clear();
                          graphics.beginBitmapFill(_loadedBitmap.bitmapData);
                          graphics.drawTriangles(
                                  _model.vertices,
                                  _model.sides,
                                  _model.uvtData,
                                  TriangleCulling.NEGATIVE
                          );
                          graphics.endFill();
                  }
Handler for the ENTER_FRAME event. This rotates the transform, then rerenders the model.
parameter: event Event dispatched by this sprite. 

  
                  private function onSpriteEnterFrame(event:Event):void {
                          _transform.appendRotation(2, Vector3D.Y_AXIS);
                          render();
                  }
  
          }
  
  }
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 04/09/2009

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