Function testIntersects

src/ImathTest/testBox.cpp:442–603

template <class T>
void
testIntersects (const char* type)
{
    cout << "    intersects() for type " << type << endl;

    IMATH_INTERNAL_NAMESPACE::Rand32 rand (0);

    //
    // Intersect point with empty box.
    //
    {
        IMATH_INTERNAL_NAMESPACE::Box<T> b;
        T                                p (1);

        assert (!b.intersects (p));
    }

    //
    // Intersect point with non-empty, has-volume box.
    //
    {
        IMATH_INTERNAL_NAMESPACE::Box<T> b (T (-1), T (1));
        T                                p0 (0);
        T                                p1 (5);
        T                                p2 (-5);

        assert (b.intersects (p0));
        assert (!b.intersects (p1));
        assert (!b.intersects (p2));
    }

    //
    // Intersect point with non-empty, no-volume box.
    // Boxes are:
    //    2D: [(0, 0),       (0, 1)      ]
    //    3D: [(0, 0, 0),    (0, 0, 1)   ]
    //    4D: [(0, 0, 0, 0), (0, 0, 0, 1)]
    //
    {
        T min (0);
        T max                     = min;
        max[T::dimensions () - 1] = 1;

        T                                p0 (0);
        T                                p1 (5);
        IMATH_INTERNAL_NAMESPACE::Box<T> b (min, max);

        assert (b.intersects (p0));
        assert (!b.intersects (p1));
    }

    //
    // Intersect empty box with empty box.
    //
    {
        IMATH_INTERNAL_NAMESPACE::Box<T> b0;
        IMATH_INTERNAL_NAMESPACE::Box<T> b1;