setPoints with a typed array not working in birds demo, only regular array works

[trusktr]

See these lines:

three-meshline/demo/birds.html

Lines 76 to 87 in eba9c4a

	// FIXME initial positions not working with typed array
	// const positions = new Float32Array(100 * 3)
	// for (let i = 0; i < 100; i += 3) {
	// positions[i + 0] = this.position.x
	// positions[i + 1] = this.position.y
	// positions[i + 2] = this.position.z
	// }
	// FIXME initial positions works only with Vector3 array
	const positions = []
	for (let i = 0; i < 100; i += 1) {
	positions.push(this.position.clone())
	}

The loop with the Float32Array leads to the lines initially glitched, but the loop with the normal Array works fine.