nd_box_ratio_cases()

static void nd_box_ratio_cases ( void  )

static

Definition at line 127 of file postgis/cunit/cu_tester.c.

{
        ND_BOX covering = make_box(0.0f, 0.0f, 0.0f, 0.0f, 2.0f, 2.0f, 2.0f, 0.0f);
        ND_BOX interior = make_box(0.5f, 0.5f, 0.5f, 0.0f, 1.5f, 1.5f, 1.5f, 0.0f);
        ND_BOX partial = make_box(0.0f, 0.0f, 0.0f, 0.0f, 0.5f, 0.5f, 0.5f, 0.0f);
        ND_BOX target = make_box(0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, 0.0f);
        ND_BOX flat = make_box(0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f);
        ND_BOX touch = make_box(2.0f, 0.0f, 0.0f, 0.0f, 3.0f, 1.0f, 1.0f, 0.0f);
 
        /* Full coverage should evaluate to one regardless of the extra extent. */
        CU_ASSERT_DOUBLE_EQUAL(nd_box_ratio(&covering, &interior, 3), 1.0, 1e-12);
        /* A shared octant carries one eighth of the reference volume. */
        CU_ASSERT_DOUBLE_EQUAL(nd_box_ratio(&partial, &target, 3), 0.125, 1e-12);
        /* Degenerate slabs have zero volume in three dimensions. */
        CU_ASSERT_DOUBLE_EQUAL(nd_box_ratio(&covering, &flat, 3), 0.0, 1e-12);
        /* Boxes that only touch along a face should not count as overlap. */
        CU_ASSERT_DOUBLE_EQUAL(nd_box_ratio(&covering, &touch, 3), 0.0, 1e-12);
}

References make_box(), and nd_box_ratio().

Referenced by main().

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