Quick way to add multiple of the same exact mesh?

[chandlerprall]

Quick way to add multiple of the same exact mesh?

[chandlerprall]

There is currently no caching for custom shapes such as ConvexMesh. However, in your case you should be able to use a BoxMesh which will envelope each die. This will result in much faster loading and processing times, and will be cached / reused.

[rileydutton]

The die are actually polyhedral, not cubes, so the BoxMesh won't work, right?

Is this something that I could figure out if I poke around the code enough, or am I just stuck?

[chandlerprall]

The box mesh just uses the geometry's bounding box properties. None of the meshes are directly tied to any of Three's geometries.

EDIT: Sorry, just realized that by polyhedral you mean they are not 6-sided dice, now I'm rethinking :)

[chandlerprall]

2,000 vertices is a huge amount - is it possible to get the basic shape of the dice with a lower vertex count? You could then use that shape as the physics body and attach your high-poly model as a child.

I am also thinking about how to cache any of the custom shapes which would help the generation time, though simulation performance will still be impacted by the high vertex count.

[rileydutton]

Is there an example of using a high-poly model attached to a low-poly physics object? Sorry, I'm really new to all this 3D stuff :-)

I did figure out how to cache the object in physijs_worker using the same method that the BoxMesh was using. As you've said, simulation time isn't going to be great (which is why the low-poly one is a good idea), but at least this way it load quickly.

[chandlerprall]

Something like this should work for the low-poly physics version

var material_hidden = new THREE.MeshBasicMaterial(),
     real_material = ...your dice material...;
material_hidden.visible = false;

var dice = new THREE.Mesh( high_poly_mesh, real_material );
var lowPoly = new Physijs.ConvexMesh( low_poly_mesh, material_hidden );
lowPoly.add( dice );
scene.add( lowPoly );

[rileydutton]

Great, thanks, I'll give something like that a shot!

[ThatsAMorais]

Hi. I enabled the caching for hulls and did what you suggested with adding the high poly mesh to the low poly version, but it seems that caching lowPoly is retaining the children as well. The solution itself works extremely well, otherwise.

So, as you create more objects if you aren't careful and readding dice to low_poly on repeated loads you will have lots of copies of dice in each subsequent load of lowPoly. I don't want to spend anyone's time asking for a solution, but I wanted to point out a hazard in doing this.