backend/libs/three/core/InstancedInterleavedBuffer.js

import { InterleavedBuffer } from './InterleavedBuffer.js';

class InstancedInterleavedBuffer extends InterleavedBuffer {
	constructor(array, stride, meshPerAttribute = 1) {
		super(array, stride);

		this.meshPerAttribute = meshPerAttribute;
	}

	copy(source) {
		super.copy(source);

		this.meshPerAttribute = source.meshPerAttribute;

		return this;
	}

	clone(data) {
		const ib = super.clone(data);

		ib.meshPerAttribute = this.meshPerAttribute;

		return ib;
	}

	toJSON(data) {
		const json = super.toJSON(data);

		json.isInstancedInterleavedBuffer = true;
		json.meshPerAttribute = this.meshPerAttribute;

		return json;
	}
}

InstancedInterleavedBuffer.prototype.isInstancedInterleavedBuffer = true;

export { InstancedInterleavedBuffer };