ある点から平面までの距離

calcDistancePointAndPlane.cs

float calcDistancePointAndPlane (Vector3 p, Vector3 v0, Vector3 v1, Vector3 v2) {
	Vector3 n = Vector3.Normalize (Vector3.Cross (v1 - v0, v2 - v1));
	Vector3 g = (v0 + v1 + v2) / 3.0f;

	return Mathf.Abs (Vector3.Dot (n, p - g));
}