playcanvas

Version:

Open-source WebGL/WebGPU 3D engine for the web

28 lines (27 loc) • 788 B

JavaScript

const createVariants = (gltf) => {
	if (!gltf.hasOwnProperty("extensions") || !gltf.extensions.hasOwnProperty("KHR_materials_variants")) {
		return null;
	}
	const data = gltf.extensions.KHR_materials_variants.variants;
	const variants = {};
	for (let i = 0; i < data.length; i++) {
		variants[data[i].name] = i;
	}
	return variants;
};
const registerMeshVariants = (primitive, meshId, meshVariants) => {
	if (primitive?.extensions?.KHR_materials_variants) {
		const variants = primitive.extensions.KHR_materials_variants;
		const tempMapping = {};
		variants.mappings.forEach((mapping) => {
			mapping.variants.forEach((variant) => {
				tempMapping[variant] = mapping.material;
			});
		});
		meshVariants[meshId] = tempMapping;
	}
};
export {
	createVariants,
	registerMeshVariants
};