test_ptarray_isccw()

static void test_ptarray_isccw ( void  )

static

Definition at line 274 of file cu_ptarray.c.

References LW_PARSER_CHECK_NONE, lwgeom_as_lwline(), lwgeom_as_lwpoly(), lwgeom_from_hexwkb(), lwgeom_from_text(), lwline_free(), lwpoly_free(), LWLINE::points, ptarray_isccw(), and LWPOLY::rings.

Referenced by ptarray_suite_setup().

{
        LWLINE *line;
        LWPOLY* poly;
        int ccw;

        /* clockwise rectangle */
        line = lwgeom_as_lwline(lwgeom_from_text("LINESTRING(0 0,0 10,10 10,10 0, 0 0)"));
        ccw = ptarray_isccw(line->points);
        CU_ASSERT_EQUAL(ccw, 0);
        lwline_free(line);

        /* clockwise triangle */
        line = lwgeom_as_lwline(lwgeom_from_text("LINESTRING(0 3,20 4,20 3, 0 3)"));
        ccw = ptarray_isccw(line->points);
        CU_ASSERT_EQUAL(ccw, 0);
        lwline_free(line);

        /* counterclockwise triangle */
        line = lwgeom_as_lwline(lwgeom_from_text("LINESTRING(0 3,20 3,20 4, 0 3)"));
        ccw = ptarray_isccw(line->points);
        CU_ASSERT_EQUAL(ccw, 1);
        lwline_free(line);

        /* counterclockwise narrow ring (see ticket #1302) */
        line = lwgeom_as_lwline(lwgeom_from_hexwkb("01020000000500000000917E9BA468294100917E9B8AEA284137894120A4682941C976BE9F8AEA2841B39ABE1FA46829415ACCC29F8AEA2841C976BE1FA4682941C976BE9F8AEA284100917E9BA468294100917E9B8AEA2841", LW_PARSER_CHECK_NONE));
        ccw = ptarray_isccw(line->points);
        CU_ASSERT_EQUAL(ccw, 1);
        lwline_free(line);

        /* clockwise narrow ring (see ticket #1302) */
        line = lwgeom_as_lwline(lwgeom_from_hexwkb("01020000000500000000917E9BA468294100917E9B8AEA2841C976BE1FA4682941C976BE9F8AEA2841B39ABE1FA46829415ACCC29F8AEA284137894120A4682941C976BE9F8AEA284100917E9BA468294100917E9B8AEA2841", LW_PARSER_CHECK_NONE));
        ccw = ptarray_isccw(line->points);
        CU_ASSERT_EQUAL(ccw, 0);
        lwline_free(line);

        /* Clockwise narrow ring (see ticket #1302) */
        poly = lwgeom_as_lwpoly(lwgeom_from_hexwkb("0103000000010000000500000000917E9BA468294100917E9B8AEA2841C976BE1FA4682941C976BE9F8AEA2841B39ABE1FA46829415ACCC29F8AEA284137894120A4682941C976BE9F8AEA284100917E9BA468294100917E9B8AEA2841", LW_PARSER_CHECK_NONE));
        ccw = ptarray_isccw(poly->rings[0]);
        CU_ASSERT_EQUAL(ccw, 0);
        lwpoly_free(poly);
}

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