Method getNormalTexture

packages/melonjs/src/video/texture/atlas.js:347–355

* Return the paired normal-map texture for the given region, or `null` * if no normal map was provided to this atlas. The normal map shares * the same UV layout as the color texture returned by TextureAtlas#getTexture. * @param {object} [region] - region name in case of multipack textu

(region)

	 * @returns {HTMLImageElement|HTMLCanvasElement|OffscreenCanvas|ImageBitmap|null}
	 */
	getNormalTexture(region) {
		if (this.normalSources.size === 0) {
			return null;
		}
		if (typeof region === "object" && typeof region.texture === "string") {
			return this.normalSources.get(region.texture) ?? null;
		}
		return this.normalSources.get(this.activeAtlas) ?? null;
	}

	/**
	 * add a region to the atlas