Problem with Context3D Sample
I was trying to make my own version of the Context3D Sample, but it renders nothing. I am sure that there must be something in the logic, but I need help on finding this bug. Thanks for all the help I can get on this. My code is as follows:
package
{
import com.adobe.utils.AGALMiniAssembler;
import com.adobe.utils.PerspectiveMatrix3D;
import flash.display.Sprite;
import flash.display.Stage3D;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.display3D.Context3D;
import flash.display3D.Context3DRenderMode;
import flash.display3D.Context3DProgramType;
import flash.display3D.Context3DTriangleFace;
import flash.display3D.Context3DVertexBufferFormat;
import flash.display3D.IndexBuffer3D;
import flash.display3D.Program3D;
import flash.display3D.VertexBuffer3D;
import flash.events.ErrorEvent;
import flash.events.Event;
import flash.geom.Matrix3D;
import flash.geom.Rectangle;
import flash.geom.Matrix;
import flash.geom.Vector3D;
public class S3DTest extends Sprite
{
// basic Stage3D objects
private var myS3D:Stage3D;
private var myC3D:Context3D;
// necessary buffers for polygonal object description
private var myVBuffer:VertexBuffer3D;
private var myIBuffer:IndexBuffer3D;
// object data
private var vertexes:Vector.<Number>=Vector.<Number>([0,0,0,1,0,0,
0,1,0,1,0,0,
1,1,0,1,0,0,
1,0,0,1,0,0,
0,0,0,0,1,0,
1,0,0,0,1,0,
1,0,1,0,1,0,
0,0,1,0,1,0,
0,0,1,1,0,0,
1,0,1,1,0,0,
1,1,1,1,0,0,
0,1,1,1,0,0,
0,1,1,0,1,0,
1,1,1,0,1,0,
1,1,0,0,1,0,
0,1,0,0,1,0,
0,1,1,0,0,1,
0,1,0,0,0,1,
0,0,0,0,0,1,
0,0,1,0,0,1,
1,1,0,0,0,1,
1,1,1,0,0,1,
1,0,1,0,0,1,
1,0,0,0,0,1]);
private var indexes:Vector.<uint>=Vector.<uint>([2,1,0,
3,2,0,
4,7,5,
7,6,5,
8,11,9,
9,11,10,
12,15,13,
13,15,14,
16,19,17,
17,19,18,
20,23,21,
21,23,22]);
// shader data
private var myVertexAssembler:AGALMiniAssembler=new AGALMiniAssembler();
private var myFragmentAssembler:AGALMiniAssembler=new AGALMiniAssembler();
private var myProgram:Program3D;
// camera related data
private var viewWidth:Number=640;
private var viewHeight:Number=480;
private var camZNear:Number=1;
private var camZFar:Number=500;
private var camFOV:Number=45;
private var projection:PerspectiveMatrix3D=new PerspectiveMatrix3D();
private var model:Matrix3D=new Matrix3D();
private var view:Matrix3D=new Matrix3D();
private var transformMatrix:Matrix3D=new Matrix3D();
private var pivot:Vector3D=new Vector3D();
public function S3DTest():void
{
// setup initial state of things in Flash
stage.scaleMode=StageScaleMode.NO_SCALE;
stage.align=StageAlign.TOP_LEFT;
// setup 3D
myS3D=stage.stage3Ds[0];
myS3D.x=10;
myS3D.y=10;
myS3D.addEventListener(Event.CONTEXT3D_CREATE,contextCreated);
myS3D.addEventListener(ErrorEvent.ERROR,contextError);
myS3D.requestContext3D(Context3DRenderMode.AUTO);
}
private function contextCreated(e:Event):void{
// setup 3D context
myC3D=Stage3D(e.target).context3D;
trace("3D driver: "+myC3D.driverInfo);
myC3D.enableErrorChecking=true; // slows render, but useful when testing
myC3D.configureBackBuffer(viewWidth,viewHeight,2,false);
myC3D.setCulling(Context3DTriangleFace.BACK);
initPolys(); // after getting our 3D context we initialize our objects
initShaders(); // we then proceed to the render step
}
private function initPolys():void{
// load 3D objects
myVBuffer=myC3D.createVertexBuffer(vertexes.length/6,6);
myVBuffer.uploadFromVector(vertexes,0,vertexes.length/6);
myIBuffer=myC3D.createIndexBuffer(indexes.length);
myIBuffer.uploadFromVector(indexes,0,indexes.length);
// assign vertex data inputs for the shader code
myC3D.setVertexBufferAt(0,myVBuffer,0,Context3DVertexBufferFormat.FLOAT_3); // coordinates
myC3D.setVertexBufferAt(1,myVBuffer,3,Context3DVertexBufferFormat.FLOAT_3); // colors
}
private function initShaders():void{
// vertex shaders
myVertexAssembler.assemble(Context3DProgramType.VERTEX,"m44 op, va0, vc0 \n"+"mov v0, va1",false);
myFragmentAssembler.assemble(Context3DProgramType.FRAGMENT,"mov oc, v0",false);
// create shader program and upload vertex and fragment codes
myProgram=myC3D.createProgram();
myProgram.upload(myVertexAssembler.agalcode,myFragmentAssembler.agalcode);
myC3D.setProgram(myProgram);
// set camera related data
projection.perspectiveFieldOfViewLH(camFOV,viewWidth/viewHeight,camZNear,camZFar);
view.appendTranslation(0,0,-2); // move camera back in Z axis
model.appendTranslation(-0.5,-0.5,-0.5); // translate object to center
// set the render loop
stage.addEventListener(Event.ENTER_FRAME,renderPolys); // for your 3D animation
}
private function renderPolys(e:Event):void{
// rotate the object each frame. Note that the rotation order is important
model.appendRotation(0.5,Vector3D.Z_AXIS,pivot);
model.appendRotation(0.5,Vector3D.Y_AXIS,pivot);
model.appendRotation(0.5,Vector3D.X_AXIS,pivot);
// add camera and object transformations
transformMatrix.identity();
transformMatrix.append(model);
transformMatrix.append(view);
transformMatrix.append(projection);
// apply transformations
myC3D.setProgramConstantsFromMatrix(Context3DProgramType.VERTEX,0,transformMatrix,true);
// clear render area and render
myC3D.clear(0.2,0.6,0.8);
myC3D.drawTriangles(myIBuffer,0,12);
myC3D.present();
}
private function contextError(e:ErrorEvent):void{
trace(e.errorID+": "+e.text);
}
}
}
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