Method createNeutral

src/textures/lut/LookupTexture.js:443–472

* Creates a neutral 3D LUT. * * @param {Number} size - The sidelength. * @return {LookupTexture} A neutral 3D LUT.

(size)

	 */

	static createNeutral(size) {

		const data = new Float32Array(size ** 3 * 4);
		const sizeSq = size ** 2;
		const s = 1.0 / (size - 1.0);

		for(let r = 0; r < size; ++r) {

			for(let g = 0; g < size; ++g) {

				for(let b = 0; b < size; ++b) {

					const i4 = (r + g * size + b * sizeSq) * 4;
					data[i4 + 0] = r * s;
					data[i4 + 1] = g * s;
					data[i4 + 2] = b * s;
					data[i4 + 3] = 1.0;

				}

			}

		}

		const lut = new LookupTexture(data, size);
		lut.name = "neutral";

		return lut;

	}

}