assert for Mesh material check doesn't let THREE.MeshFaceMaterial work

[alexcasalboni]

This check doesn't allow me to use THREE.MeshFaceMaterial with a cube instance:

var red = tQuery.createMeshBasicMaterial().color(0xff0000).get(0);
var green = tQuery.createMeshBasicMaterial().color(0x00ff00).get(0);
var blue = tQuery.createMeshBasicMaterial().color(0x0000ff).get(0);
var multipleMaterial = new THREE.MeshFaceMaterial([red, green, blue, red, green, blue]);
tQuery.createCube().addTo(world).material(multipleMaterial);

And actually the same happens here: without it I could directly call createCube(multipleMaterial).

It looks like instanceof does not work well as a check here.
Is it a bug or an intended limitation?
Thank you

[jeromeetienne]

i would say the bug is in three.js :) because i think all material should inherit from THREE.Material but it would not help you much.

i will simply change the assert

[jeromeetienne]

there tell me if it fit your need

[alexcasalboni]

Thank you very much, but actually the main benefit would come from editing here so that it will work simply using tQuery.createCube(multipleMaterial).

By the way, you're right: the problem seems to be about THREE.MeshFaceMaterial prototype definition, since there is no prototype inheritance:

THREE.MeshFaceMaterial = function ( materials ) {
    this.materials = materials instanceof Array ? materials : [];
};
THREE.MeshFaceMaterial.prototype.clone = function () {
    return new THREE.MeshFaceMaterial( this.materials.slice( 0 ) );
};

There should be something similar to THREE.MeshFaceMaterial.prototype = Object.create( THREE.Material.prototype );.

I know that adding multiple inheritance checks all around the library is not very elegant, I will report this issue asap.

Thank you again

[jeromeetienne]

i did it this way to reduce the 'spreading bug workaround' effect you talked about

[alexcasalboni]

If you check the issue I've opened, it looks like it is an intended behaviour, since THREE.MeshFaceMaterial is just a container for multiple materials.

I don't think they're going to make it inherit from THREE.Material.