ThreeJS WebGLInfo

• memory:常用来查看是否GPU是否清完缓存

function WebGLInfo(gl) {
	const memory = {
		geometries: 0,
		textures: 0
	};

	const render = {
		frame: 0,
		calls: 0,
		triangles: 0,
		points: 0,
		lines: 0
	};

	function update(count, mode, instanceCount) {
		render.calls++;

		switch (mode) {
			case 4:
				render.triangles += instanceCount * (count / 3);
				break;

			case 1:
				render.lines += instanceCount * (count / 2);
				break;

			case 3:
				render.lines += instanceCount * (count - 1);
				break;

			case 2:
				render.lines += instanceCount * count;
				break;

			case 0:
				render.points += instanceCount * count;
				break;

			default:
				console.error('THREE.WebGLInfo: Unknown draw mode:', mode);
				break;
		}
	}

	function reset() {
		render.frame++;
		render.calls = 0;
		render.triangles = 0;
		render.points = 0;
		render.lines = 0;
	}

	return {
		memory: memory,
		render: render,
		programs: null,
		autoReset: true,
		reset: reset,
		update: update
	};
}