RNLength R2SignedDistance(const R2Line& line, const R2Box& box)
{
// Return signed distance from line to box
RNQuadrant quadrant = line.Normal().Quadrant();
RNScalar d1 = R2SignedDistance(line, box.Corner(~quadrant & 0x3));
if (RNIsPositiveOrZero(d1)) return d1;
RNScalar d2 = R2SignedDistance(line, box.Corner(quadrant));
if (RNIsNegative(d2)) return d2;
else return 0.0;
}
RNBoolean R3Contains(const R3Halfspace& halfspace, const R3Ray& ray)
{
// Return whether halfspace contains ray
return (RNIsPositiveOrZero(halfspace.Normal().Dot(ray.Vector())) &&
R3Contains(halfspace, ray.Start()));
}
RNBoolean R3Contains(const R3Halfspace& halfspace, const R3Point& point)
{
// Return whether halfspace contains point
return (RNIsPositiveOrZero(R3SignedDistance(halfspace.Plane(), point)));
}
