C++ (Cpp) geohash_point_as_intの例

コード例 #1

ファイル: lwgeodetic_tree.c プロジェクト: ahinz/postgis

/**
* Comparing on geohash ensures that nearby nodes will be close 
* to each other in the list.
*/  
static int
circ_node_compare(const void* v1, const void* v2)
{
	POINT2D p1, p2;
	unsigned int u1, u2;
	CIRC_NODE *c1 = (CIRC_NODE*)v1;
	CIRC_NODE *c2 = (CIRC_NODE*)v2;
	p1.x = rad2deg((c1->center).lon);
	p1.y = rad2deg((c1->center).lat);
	p2.x = rad2deg((c2->center).lon);
	p2.y = rad2deg((c2->center).lat);
	u1 = geohash_point_as_int(&p1);
	u2 = geohash_point_as_int(&p2);
	if ( u1 < u2 ) return -1;
	if ( u1 > u2 ) return 1;
	return 0;
}

コード例 #2

ファイル: cu_algorithm.c プロジェクト: gbroccolo/postgis

static void test_geohash_point_as_int(void)
{
	unsigned int gh;
	POINT2D p;
	unsigned long long rs;
	
	p.x = 50; p.y = 35;
	gh = geohash_point_as_int(&p);
	rs = 3440103613;
	CU_ASSERT_EQUAL(gh, rs);
	p.x = 140; p.y = 45;
	gh = geohash_point_as_int(&p);
	rs = 3982480893;
	CU_ASSERT_EQUAL(gh, rs);
	p.x = 140; p.y = 55;
	gh = geohash_point_as_int(&p);
	rs = 4166944232;
	CU_ASSERT_EQUAL(gh, rs);
}