RESOLVED: Apply lights to a mesh’s submesh.the mesh will become black.

Software: Away3D 4.x
liuyi, Member
Posted: 19 September 2011 12:41 PM   Total Posts: 65

Here is my code:

package terrain 
{
 import away3d.containers.ObjectContainer3D;
 import away3d.core.base.SubGeometry;
 import away3d.core.base.SubMesh;
 import away3d.entities.Mesh;
 import away3d.materials.ColorMaterial;
 import away3d.materials.MaterialBase;
 import awayphysics.collision.shapes.AWPCollisionShape;
 import awayphysics.collision.shapes.AWPCompoundShape;
 import awayphysics.dynamics.AWPRigidBody;

 import flash.geom.Matrix3D;
 import flash.geom.Vector3D;
 
 /**
  * ...
  * @author liu yi
  */
 public class TerrainTile extends ObjectContainer3D 
 {
  
  protected var _normalAreaList:Vector.<uint>;
  protected var _restrictedAreaList:Vector.<uint>;//only store reference.
  protected var _mesh:Mesh;
   
  protected var _shape:AWPCompoundShape;
  protected var _rigidbody:AWPRigidBody;
  
  protected var _width:Number;
  protected var _height:Number;
  public var showRestrictedArea:Boolean;
  public var material:MaterialBase
  public var restrictedAreaMaterial:MaterialBase
  public var neighbour:Vector.<uint>//for this game, just need know ,[0]=front,[2]=right,[4]=back
  
  
  /*
   * the frist child subMesh is ground, others are restricted area;
   * */
  public function TerrainTile(width:Number=100,height:Number=100) 
  {
   _mesh = new Mesh();
   _restrictedAreaList = new Vector.<uint>();
   _normalAreaList = new Vector.<uint>();
   _shape = new AWPCompoundShape();
   _rigidbody = new AWPRigidBody(_shape,_mesh);
   addChild(_mesh);
   _width = width;
   _height = _height;
   neighbour = new Vector.<uint>(8);
  
  }
  
 
  
  public function addNormalArea(subGeo:SubGeometry,shape:AWPCollisionShape=null,mat:MaterialBase=null,localPos:Vector3D=null, localRot:Matrix3D=null):void {
   _mesh.geometry.addSubGeometry(subGeo);
   _normalAreaList.push(_mesh.numChildren - 1);
   
   if (mat != null) _mesh.subMeshes[_mesh.subMeshes.length-1].material = mat;
   else if(material!=null) _mesh.subMeshes[_mesh.subMeshes.length-1].material = material;
   if(shape!=null) updateRigidbody(shape,localPos,localRot);
  }
  
  public function addRestrictedArea(subGeo:SubGeometry,shape:AWPCollisionShape, localPos:Vector3D, localRot:Matrix3D,mat:MaterialBase=null):void {
   _mesh.geometry.addSubGeometry(subGeo);
   _restrictedAreaList.push(_mesh.numChildren - 1);
   if (mat != null) _mesh.subMeshes[_mesh.subMeshes.length-1].material = mat;
   else if(restrictedAreaMaterial!=null) _mesh.subMeshes[_mesh.subMeshes.length-1].material = restrictedAreaMaterial;
   
   if(shape!=null) updateRigidbody(shape,localPos,localRot);
  }
  
  public function get width():Number {
   return _width;
  }
  public function get height():Number {
   return _height;
  }
  
  
  
  public function get mesh():Mesh {
   return _mesh;
  }
  
  public function get shape():AWPCompoundShape {
   return _shape;
  }
  
  
  public function get rigidbody():AWPRigidBody {
   return _rigidbody
  }
  
  public function set rigidbody(rigidbody:AWPRigidBody):void {
   _rigidbody=rigidbody
  }
  
  protected function updateRigidbody(shape:AWPCollisionShape, localPos:Vector3D, localRot:Matrix3D):void {
   _shape.addChildShape(shape, localPos, localRot);
   
  }
  
  
  
  
  
  
  
 }

} 

here is my example( no light for ground: http://www.ourbrander.com/sites/ourbrander.com/demo/race/

you can save this class and add some submeshes, apply lights to materail
you will see this bug.
I checked all my code, no incorrect code.
If you think this is not a bug, please tell where I need fixed.
Thanks!

 

 

   
Avatar
Alejandro Santander, Administrator
Posted: 20 September 2011 01:13 AM   Total Posts: 414   [ # 1 ]

Hey liuyi,

I’ve reduced what you are doing to the simplest scenario and did not find any bugs.

The following examples contains a sphere and a cube geometry added as sub-geometries to a cylinder primitive. I then accessed the sub-geometries and assigned new color materials to them using a point light: http://www.lidev.com.ar/tests/away3d/subgeom_test/

As far as I can see, everything works fine. Are you using the latest github source?

My code is:

var redMat:ColorMaterial = new ColorMaterial(0xFF0000);
   redMat.lights = [cameraPointLight];

   var greenMat:ColorMaterial = new ColorMaterial(0x00FF00);
   greenMat.lights = [cameraPointLight];

   var blueMat:ColorMaterial = new ColorMaterial(0x0000FF);
   blueMat.lights = [cameraPointLight];

   var cube:Cube = new Cube();
   var cubeGeometry:SubGeometry = cube.geometry.subGeometries[0].clone();
   var translate:Matrix3D = new Matrix3D();
   translate.appendTranslation(150, 0, 0);
   cubeGeometry.applyTransformation(translate);

   var sphere:Sphere = new Sphere();
   var sphereGeometry:SubGeometry = sphere.geometry.subGeometries[0].clone();
   translate = new Matrix3D();
   translate.appendTranslation(-150, 0, 0);
   sphereGeometry.applyTransformation(translate);

   var r:Cylinder = new Cylinder(redMat);
   r.geometry.addSubGeometry(cubeGeometry);
   r.subMeshes[r.subMeshes.length - 1].material = greenMat;
   r.geometry.addSubGeometry(sphereGeometry);
   r.subMeshes[r.subMeshes.length - 1].material = blueMat;
   r.scale(2);
   view.scene.addChild(r); 
   
liuyi, Member
Posted: 20 September 2011 04:59 AM   Total Posts: 65   [ # 2 ]

I tested your example, works very well.
But have you try add a plane’s subgeometry to a mesh?

I tested that, and get this bug.

var p:Plane = new Plane(null, 100, 100, 100);
    var planeGeo:SubGeometry = p.geometry.subGeometries[0];
  var btmapMat:BitmapMaterial = new BitmapMaterial(_textureManager.getTexture("stoneTexture"));
  btmapMat.lights = [_light];
  btmapMat.bothSides = true;

  var ms:Mesh = new Mesh();
  ms.geometry.addSubGeometry(planeGeo);
   ms.subMeshes[0].material = btmapMat;
   _view.scene.addChild(ms); 

 

   
liuyi, Member
Posted: 20 September 2011 06:31 AM   Total Posts: 65   [ # 3 ]

I test and test , and then found the reason:
_light = new DirectionalLight( 0, -1, 0);

When I changed it to :
_light = new DirectionalLight( 0.2, -1, 0.2);

issue fixed.

In my opinion, DirectionalLight( 0, -1, 0) means light face to the y axis’s inverse direction.
But why the ground can not be see?
anyway,it has resolved.

   
 
   
     when scaleX=-1,light effect is inverse ››
‹‹ RESOLVED: lookAt not working on Broomstick

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