// This reflects the vector v over mirror m
// Note that mirror m must be normalized!
// R = V - 2 * M * (M dot V)
public static Vector2D Reflect(Vector2D v, Vector2D m)
{
// Get the dot product of v and m
float dp = Vector2D.DotProduct(m, v);
// Make the reflected vector
Vector2D mv = new Vector2D();
mv.x = v.x - (2f * m.x * dp);
mv.y = v.y - (2f * m.y * dp);
// Return the reflected vector
return(mv);
}
/// <summary>
/// This returns Z on the plane at X, Y
/// </summary>
public double GetZ(Vector2D pos)
{
return((-offset - Vector2D.DotProduct(normal, pos)) / normal.z);
}