explode mesh with subdivide

[The Snow Irbix]

Hello everybody !

Thank you to take your time to try to help me,

I've got a problem with subdivide mesh, i would like to explode a mesh by subdivide it.

var sphere = BABYLON.Mesh.CreateSphere("sphere1", 16, 2, scene);sphere.subdivide(4);var mesh = sphere.subMeshes[0].getMesh();alert(mesh.position + sphere.subMeshes[0].position); // return : {X: 0 Y:0 Z:0}undefined

I would like to change position of subMeshes but i don't find how to change it.

 

 

[Dad72]

You can not totalize a vector3 as you do here: alert(mesh.position + sphere.subMeshes[0].position):

 

try: add(otherVector) → {BABYLON.Vector3}

var newVector = mesh.position.add(sphere.subMeshes[0].position);alert(newVector);

[The Snow Irbix]

It is just a test to show that submeshes position is undefined, and when i try to get the mesh with the method getMesh(), it return the parent mesh whereas i would like to get the submesh to move only a part of the origin mesh that i have cut.

[Dad72]

The problem here is sphere.subMeshes[0]. the sphere has no submesh.

 

see : console.log(sphere);

[The Snow Irbix]

But how can i divide the sphere ? Have you an other idea ?

 

The documentation say : 

subdivide(count)

Subdivide this mesh by creating "count" submeshes stored in this.subMeshes

 

when we add :

sphere.showSubMeshesBoundingBox = true;

we see the four BoundingBox of the subMeshes

[Dad72]

Excuse me, you have reasons.
 
look here, it works right:
http://www.babylonjs-playground.com/#1XCKCL#2

[The Snow Irbix]

So when I change the X position value, I would like to translate only a part of the sphere and not the whole sphere, is it possible ? And if it is, how can I do that ?

http://www.babylonjs-playground.com/#1XCKCL#4

[Dad72]

I think you should use the class CSG:

http://doc.babylonjs.com/page.php?p=24736

 

some info here on this class:

https://github.com/CraigFeldspar/BabylonCSG

 

This class will allow you to separate your sphere into several objects you can move then.

[The Snow Irbix]

It seems to be what I search !

I will try to explode a cube on mouse picking thanks to CSG !

Thanks a lot to your help !