@loaders.gl/gltf
Version:
Framework-independent loader for the glTF format
55 lines • 2.2 kB
JavaScript
// GLTF EXTENSION: KHR_lights_punctual
// https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_lights_punctual
import { assert } from "../../utils/assert.js";
import { GLTFScenegraph } from "../../api/gltf-scenegraph.js";
const KHR_LIGHTS_PUNCTUAL = 'KHR_lights_punctual';
export const name = KHR_LIGHTS_PUNCTUAL;
export async function decode(gltfData) {
const gltfScenegraph = new GLTFScenegraph(gltfData);
const { json } = gltfScenegraph;
// Move the light array out of the extension and remove the extension
const extension = gltfScenegraph.getExtension(KHR_LIGHTS_PUNCTUAL);
if (extension) {
// @ts-ignore
gltfScenegraph.json.lights = extension.lights;
gltfScenegraph.removeExtension(KHR_LIGHTS_PUNCTUAL);
}
// Any nodes that have the extension, add lights field pointing to light object
// and remove the extension
for (const node of json.nodes || []) {
const nodeExtension = gltfScenegraph.getObjectExtension(node, KHR_LIGHTS_PUNCTUAL);
if (nodeExtension) {
// @ts-ignore
node.light = nodeExtension.light;
}
gltfScenegraph.removeObjectExtension(node, KHR_LIGHTS_PUNCTUAL);
}
}
// Move the light ar ray out of the extension and remove the extension
export async function encode(gltfData) {
const gltfScenegraph = new GLTFScenegraph(gltfData);
const { json } = gltfScenegraph;
// @ts-ignore
if (json.lights) {
const extension = gltfScenegraph.addExtension(KHR_LIGHTS_PUNCTUAL);
// @ts-ignore
assert(!extension.lights);
// @ts-ignore
extension.lights = json.lights;
// @ts-ignore
delete json.lights;
}
// Any nodes that have lights field pointing to light object
// add the extension
// @ts-ignore
if (gltfScenegraph.json.lights) {
// @ts-ignore
for (const light of gltfScenegraph.json.lights) {
const node = light.node;
gltfScenegraph.addObjectExtension(node, KHR_LIGHTS_PUNCTUAL, light);
}
// @ts-ignore
delete gltfScenegraph.json.lights;
}
}
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