Combining Meshes / SubMeshes

[Hazardus]

I'm trying to wrap my head around submeshes so that I can built something similar to BABYLON.Mesh.MergeMeshes, but maintain separation via sub-meshes and materials via mutlimaterial

 

In this PG, http://www.babylonjs-playground.com/#28EUMN#21, I cannot seem to comprehend the relationship of indexStart and indexCount

 

The same goes for this PG, http://www.babylonjs-playground.com/#1FSS3J - how do I color both faces of the Y axis?

[GameMonetize]

Let's imagine you have 30 indices (10 faces).

IndexStart for the global object = 0

IndexCount for the gobal object = 30

 

Now let's say you want to create a submesh for face 1 to 3:

indexStart = 3 (index 0, 1 and 2 are for the first face)

indexCount = 3 * 3 (3 faces)

 

Does it makes sense?

[Hazardus]

Somewhat. In the 2nd PG example, how would I go about making the positive Y face(s) green as well? I think this would help clear it up for me.

 

I expected this to work:

var submesh1 = new BABYLON.SubMesh(0, 0, verticesCount, 0, 12, box);var submesh2 = new BABYLON.SubMesh(1, 0, verticesCount, 12, 12, box);var submesh3 = new BABYLON.SubMesh(2, 0, verticesCount, 24, 12, box);

24 vertices & 36 indices total

 

 

Scratch that, I copied from another PG example and didn't notice it was using emissiveColor. It does show it working as expected now that it's diffuseColor: http://www.babylonjs-playground.com/#1FSS3J#1

 

The sphere one was tricky to me because of the numbers it used. I understand now the numbers depend on the segments used in the sphere. Here's a PG with even numbers! http://www.babylonjs-playground.com/#28EUMN#22

 

Thanks for helping me clear this up!

[jerome]

if it's only for a box, check this also : http://doc.babylonjs.com/tutorials/CreateBox_Per_Face_Textures_And_Colors

 

I guess that I will implement it then for the cylinder and the sphere (property "hasRings" up to come)