test_lwgeom_simplify()

static void test_lwgeom_simplify ( void  )

static

Definition at line 945 of file cu_algorithm.c.

References LW_FALSE, LW_PARSER_CHECK_NONE, LW_TRUE, lwfree(), lwgeom_free(), lwgeom_from_wkt(), lwgeom_simplify(), and lwgeom_to_ewkt().

Referenced by algorithms_suite_setup().

{
                LWGEOM *l;
                LWGEOM *g;
                char *ewkt;

                /* Simplify but only so far... */
                g = lwgeom_from_wkt("LINESTRING(0 0, 1 0, 1 1, 0 1, 0 0)", LW_PARSER_CHECK_NONE);
                l = lwgeom_simplify(g, 10, LW_TRUE);
                ewkt = lwgeom_to_ewkt(l);
                CU_ASSERT_STRING_EQUAL(ewkt, "LINESTRING(0 0,0 0)");
                lwgeom_free(g);
                lwgeom_free(l);
                lwfree(ewkt);

                /* Simplify but only so far... */
                g = lwgeom_from_wkt("POLYGON((0 0, 1 0, 1 1, 0 1, 0 0))", LW_PARSER_CHECK_NONE);
                l = lwgeom_simplify(g, 10, LW_TRUE);
                ewkt = lwgeom_to_ewkt(l);
                CU_ASSERT_STRING_EQUAL(ewkt, "POLYGON((0 0,1 0,1 1,0 0))");
                lwgeom_free(g);
                lwgeom_free(l);
                lwfree(ewkt);

                /* Simplify and collapse */
                g = lwgeom_from_wkt("LINESTRING(0 0, 1 0, 1 1, 0 1, 0 0)", LW_PARSER_CHECK_NONE);
                l = lwgeom_simplify(g, 10, LW_FALSE);
                CU_ASSERT_EQUAL(l, NULL);
                lwgeom_free(g);
                lwgeom_free(l);

                /* Simplify and collapse */
                g = lwgeom_from_wkt("POLYGON((0 0, 1 0, 1 1, 0 1, 0 0))", LW_PARSER_CHECK_NONE);
                l = lwgeom_simplify(g, 10, LW_FALSE);
                CU_ASSERT_EQUAL(l, NULL);
                lwgeom_free(g);
                lwgeom_free(l);

                /* Not simplifiable */
                g = lwgeom_from_wkt("LINESTRING(0 0, 50 1.00001, 100 0)", LW_PARSER_CHECK_NONE);
                l = lwgeom_simplify(g, 1.0, LW_FALSE);
                ewkt = lwgeom_to_ewkt(l);
                CU_ASSERT_STRING_EQUAL(ewkt, "LINESTRING(0 0,50 1.00001,100 0)");
                lwgeom_free(g);
                lwgeom_free(l);
                lwfree(ewkt);

                /* Simplifiable */
                g = lwgeom_from_wkt("LINESTRING(0 0,50 0.99999,100 0)", LW_PARSER_CHECK_NONE);
                l = lwgeom_simplify(g, 1.0, LW_FALSE);
                ewkt = lwgeom_to_ewkt(l);
                CU_ASSERT_STRING_EQUAL(ewkt, "LINESTRING(0 0,100 0)");
                lwgeom_free(g);
                lwgeom_free(l);
                lwfree(ewkt);
}

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