PostGIS  2.5.0dev-r@@SVN_REVISION@@
static void test_lwpoly_construct_circle ( void  )
static

Definition at line 1273 of file cu_algorithm.c.

References ASSERT_INT_EQUAL, LW_TRUE, lwgeom_area(), lwgeom_count_vertices(), lwgeom_get_bbox(), lwgeom_get_srid(), lwpoly_as_lwgeom(), lwpoly_construct_circle(), lwpoly_free(), r, pixval::x, GBOX::xmax, GBOX::xmin, pixval::y, GBOX::ymax, and GBOX::ymin.

Referenced by algorithms_suite_setup().

1274 {
1275  LWPOLY* p;
1276  const GBOX* g;
1277  const int srid = 4326;
1278  const int segments_per_quad = 17;
1279  const int x = 10;
1280  const int y = 20;
1281  const int r = 5;
1282 
1283  /* With normal arguments you should get something circle-y */
1284  p = lwpoly_construct_circle(srid, x, y, r, segments_per_quad, LW_TRUE);
1285 
1286  ASSERT_INT_EQUAL(lwgeom_count_vertices(lwpoly_as_lwgeom(p)), segments_per_quad * 4 + 1);
1288 
1290  CU_ASSERT_DOUBLE_EQUAL(g->xmin, x-r, 0.1);
1291  CU_ASSERT_DOUBLE_EQUAL(g->xmax, x+r, 0.1);
1292  CU_ASSERT_DOUBLE_EQUAL(g->ymin, y-r, 0.1);
1293  CU_ASSERT_DOUBLE_EQUAL(g->ymax, y+r, 0.1);
1294 
1295  CU_ASSERT_DOUBLE_EQUAL(lwgeom_area(lwpoly_as_lwgeom(p)), M_PI*5*5, 0.1);
1296 
1297  lwpoly_free(p);
1298 
1299  /* No segments? No circle. */
1300  p = lwpoly_construct_circle(srid, x, y, r, 0, LW_TRUE);
1301  CU_ASSERT_TRUE(p == NULL);
1302 
1303  /* Negative radius? No circle. */
1304  p = lwpoly_construct_circle(srid, x, y, -1e-3, segments_per_quad, LW_TRUE);
1305  CU_ASSERT_TRUE(p == NULL);
1306 
1307  /* Zero radius? Invalid circle */
1308  p = lwpoly_construct_circle(srid, x, y, 0, segments_per_quad, LW_TRUE);
1309  CU_ASSERT_TRUE(p != NULL);
1310  lwpoly_free(p);
1311 }
char * r
Definition: cu_in_wkt.c:24
int32_t lwgeom_get_srid(const LWGEOM *geom)
Return SRID number.
Definition: lwgeom.c:909
LWGEOM * lwpoly_as_lwgeom(const LWPOLY *obj)
Definition: lwgeom.c:319
void lwpoly_free(LWPOLY *poly)
Definition: lwpoly.c:173
#define LW_TRUE
Return types for functions with status returns.
Definition: liblwgeom.h:75
#define ASSERT_INT_EQUAL(o, e)
const GBOX * lwgeom_get_bbox(const LWGEOM *lwgeom)
Get a non-empty geometry bounding box, computing and caching it if not already there.
Definition: lwgeom.c:727
tuple x
Definition: pixval.py:53
uint32_t lwgeom_count_vertices(const LWGEOM *geom)
Count the total number of vertices in any LWGEOM.
Definition: lwgeom.c:1228
double lwgeom_area(const LWGEOM *geom)
Definition: lwgeom.c:1850
LWPOLY * lwpoly_construct_circle(int srid, double x, double y, double radius, uint32_t segments_per_quarter, char exterior)
Definition: lwpoly.c:120
tuple y
Definition: pixval.py:54

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