Is it possible to add a different material instance to each side of a basic cube node?

[wilfredbtan]

I am using the CubeNode provided in the library. I use a basic material with a lit model and an additional texture parameter.

Currently, I am assigning a bitmap generated from a Custom Android View as a texture to the material but I wish to assign a different texture to each side of the cube. Is this possible with this library? If not, could anyone point me in the right direction to implement this?

My code is below:

Material

material {
    name : lit,
    shadingModel : lit,
    parameters : [
        {
            type : float3,
            name : baseColor
        },
        {
            type : float,
            name : roughness
        },
        {
            type : float,
            name : metallic
        },
        {
            type : sampler2d,
            name : texture
        }
    ],
    requires: [
        uv0
    ]
}

fragment {
    void material(inout MaterialInputs material) {
        prepareMaterial(material);
        material.baseColor.rgb = materialParams.baseColor;
        material.roughness = materialParams.roughness;
        material.metallic = materialParams.metallic;
        material.baseColor = texture(materialParams_texture, getUV0());
    }
}

Setting the texture of the material

val customView = CustomView(context).also {
    it.measure(customWidth, customHeight)
    it.layout(0, 0, customWidth, customHeight)
}

val bitmap = customView.drawToBitmap()

val texture = Texture.Builder()
    .width(bitmap.width)
    .height(bitmap.height)
    .sampler(Texture.Sampler.SAMPLER_2D)
    .format(Texture.InternalFormat.RGBA8)
    .build(engine)
    .also { texture ->
        TextureHelper.setBitmap(engine, texture, 0, bitmap)
    }

cubeNode.materialInstance.setTexture(texture)

[johnwhh]

As of version 2.1.0, to assign material instances to faces on a CubeNode you can do the following:

val cubeNode = CubeNode(sceneView.engine)
val primitiveIndex = 0  // This index corresponds to a face on the geometry
cubeNode.setMaterialInstanceAt(primitiveIndex, yourMaterialInstance)