Hi,

  I have a Mesh which I populate with a set of triangles. Some 3D Objects have a great amount of triangles and when placed on a scene, rendering when object is moved is quite slow.

  Is there any tip or advice I could base on, or even any transformation to reduce the weight of the mesh?

Thanks.

How big?

You can search for space partitioning algorithms. If its an outdoor engine, you can use OCTree, if the height doesn’t change that much, you can use a Quadtree, if its indoor engine, better to look for PVS, or BSPs.

@GoroMatsumoto, My mesh has 188640 triangles. It is an sculpture.

@andreahmed, I do not understand. Could please explain it a little bit more?

I’m developing a Viewer with the basics control for moving the object in the space. When I use the Orbit function, the object takes too long when rotating, moving, etc…..

I think that It’s not so big.
How do you transform the mesh?
A general way of mesh transformation is:

http://linktale.net/dev/away3d-examples-fp11_4_1_1_Beta/src/?code=Intermediate_MonsterHeadShading&size=1200_800
This example demo run with 200,000 over polygons.
Can you watch this demo smoothly?

Yes, I can watch it smoothly.

I move the camera with the next code:

private function onEnterFrame(e:Event):void {

  var cameraSpeed:Number = 0.3;
  if (isMoving) {
    camera.panAngle = cameraSpeed*(stage.mouseX - lastMouseX) + lastPanAngle;
    camera.tiltAngle = cameraSpeed*(stage.mouseY - lastMouseY) + lastTiltAngle;
  }
 
  camera.hover();
  View.render();
  }

Do you use latest version of Away?

As far as I know, “camera.hover()” isn’t in Away3D ver4.
It’s in ver3.6. Maybe 3.6 is CPU based.

Hi @GoroMatsumoto,

  You are right, I’m using the 3.6 release.

  I will have to change to 4.1.1. Is there any ebook i could use for learning purposes?

Regards.

Maybe no books for 4.1.
You can learn it from some tuts and example sources.

Away core 4.1.1
http://away3d.com/download/
https://github.com/away3d/away3d-core-fp11

Example demos:
http://linktale.net/dev/away3d-examples-fp11_4_1_1_Beta/src/

Tutorials:
http://away3d.com/tutorials/

And, the latest has a GUI tool and it’s tutorial videos.
http://awaytools.com/awaybuilder/
This tool is very useful. You can load the model to your scene easily.