test_lwmline_clip()

static void test_lwmline_clip ( void  )

static

Definition at line 797 of file cu_algorithm.c.

{
        LWCOLLECTION *c;
        char *ewkt;
        LWGEOM *mline = NULL;
        LWGEOM *line = NULL;
 
        /*
        ** Set up the input line. Trivial one-member case.
        */
        mline = lwgeom_from_wkt("MULTILINESTRING((0 0,0 1,0 2,0 3,0 4))", LW_PARSER_CHECK_NONE);
 
        /* Clip in the middle, mid-range. */
        c = lwgeom_clip_to_ordinate_range(mline, 'Y', 1.5, 2.5, 0);
        ewkt = lwgeom_to_ewkt((LWGEOM *)c);
        ASSERT_STRING_EQUAL(ewkt, "MULTILINESTRING((0 1.5,0 2,0 2.5))");
        lwfree(ewkt);
        lwcollection_free(c);
 
        lwgeom_free(mline);
 
        /*
        ** Set up the input line. Two-member case.
        */
        mline = lwgeom_from_wkt("MULTILINESTRING((1 0,1 1,1 2,1 3,1 4), (0 0,0 1,0 2,0 3,0 4))", LW_PARSER_CHECK_NONE);
 
        /* Clip off the top. */
        c = lwgeom_clip_to_ordinate_range(mline, 'Y', 3.5, 5.5, 0);
        ewkt = lwgeom_to_ewkt((LWGEOM *)c);
        ASSERT_STRING_EQUAL(ewkt, "MULTILINESTRING((1 3.5,1 4),(0 3.5,0 4))");
        lwfree(ewkt);
        lwcollection_free(c);
 
        lwgeom_free(mline);
 
        /*
        ** Set up staggered input line to create multi-type output.
        */
        mline =
            lwgeom_from_wkt("MULTILINESTRING((1 0,1 -1,1 -2,1 -3,1 -4), (0 0,0 1,0 2,0 3,0 4))", LW_PARSER_CHECK_NONE);
 
        /* Clip from 0 upwards.. */
        c = lwgeom_clip_to_ordinate_range(mline, 'Y', 0.0, 2.5, 0);
        ewkt = lwgeom_to_ewkt((LWGEOM *)c);
        ASSERT_STRING_EQUAL(ewkt, "GEOMETRYCOLLECTION(POINT(1 0),LINESTRING(0 0,0 1,0 2,0 2.5))");
        lwfree(ewkt);
        lwcollection_free(c);
 
        lwgeom_free(mline);
 
        /*
        ** Set up input line from MAC
        */
        line = lwgeom_from_wkt("LINESTRING(0 0 0 0,1 1 1 1,2 2 2 2,3 3 3 3,4 4 4 4,3 3 3 5,2 2 2 6,1 1 1 7,0 0 0 8)",
                               LW_PARSER_CHECK_NONE);
 
        /* Clip from 3 to 3.5 */
        c = lwgeom_clip_to_ordinate_range(line, 'Z', 3.0, 3.5, 0);
        ewkt = lwgeom_to_ewkt((LWGEOM *)c);
        ASSERT_STRING_EQUAL(ewkt, "MULTILINESTRING((3 3 3 3,3.5 3.5 3.5 3.5),(3.5 3.5 3.5 4.5,3 3 3 5))");
        lwfree(ewkt);
        lwcollection_free(c);
 
        /* Clip from 2 to 3.5 */
        c = lwgeom_clip_to_ordinate_range(line, 'Z', 2.0, 3.5, 0);
        ewkt = lwgeom_to_ewkt((LWGEOM *)c);
        ASSERT_STRING_EQUAL(ewkt,
                            "MULTILINESTRING((2 2 2 2,3 3 3 3,3.5 3.5 3.5 3.5),(3.5 3.5 3.5 4.5,3 3 3 5,2 2 2 6))");
        lwfree(ewkt);
        lwcollection_free(c);
 
        /* Clip from 3 to 4 */
        c = lwgeom_clip_to_ordinate_range(line, 'Z', 3.0, 4.0, 0);
        ewkt = lwgeom_to_ewkt((LWGEOM *)c);
        ASSERT_STRING_EQUAL(ewkt, "MULTILINESTRING((3 3 3 3,4 4 4 4,3 3 3 5))");
        lwfree(ewkt);
        lwcollection_free(c);
 
        /* Clip from 2 to 3 */
        c = lwgeom_clip_to_ordinate_range(line, 'Z', 2.0, 3.0, 0);
        ewkt = lwgeom_to_ewkt((LWGEOM *)c);
        ASSERT_STRING_EQUAL(ewkt, "MULTILINESTRING((2 2 2 2,3 3 3 3),(3 3 3 5,2 2 2 6))");
        lwfree(ewkt);
        lwcollection_free(c);
 
        lwgeom_free(line);
}

References ASSERT_STRING_EQUAL, LW_PARSER_CHECK_NONE, lwcollection_free(), lwfree(), lwgeom_clip_to_ordinate_range(), lwgeom_free(), lwgeom_from_wkt(), and lwgeom_to_ewkt().

Referenced by algorithms_suite_setup().

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