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test_latcxlatc.c
This contains examples on yac_latcxlatc_vec
// Copyright (c) 2024 The YAC Authors
//
// SPDX-License-Identifier: BSD-3-Clause
#include "test_cxc.h"
static void test_latcxlatc(double lon_a, double lat_a, double lon_b, double lat_b,
double lon_c, double lat_c, double lon_d, double lat_d,
double lon_ref_p, double lat_ref_p,
double lon_ref_q, double lat_ref_q, int ref_ret_val);
unsigned const p_between_ab = 1 << 0;
unsigned const q_between_ab = 1 << 1;
unsigned const p_between_cd = 1 << 2;
unsigned const q_between_cd = 1 << 3;
unsigned const circles_are_identically = 1 << 4;
double lon_middle_ab, lat_middle_ab, lon_middle_cd, lat_middle_cd;
// two circles of latitude on the same plane that intersect
for (int i = 0; i < 2; ++i) {
double lon_coords[2][2] = {{-10, 5}, {-5, 10}};
test_latcxlatc(lon_coords[i][0], 30, // point a
lon_coords[i][1], 30, // point b
lon_coords[i^1][0], 30, // point c
lon_coords[i^1][1], 30, // point d
-5, 30, // reference point p
5, 30, // reference point q
p_between_ab + p_between_cd + q_between_ab + q_between_cd +
circles_are_identically); // reference return value
}
for (int i = 0; i < 2; ++i) {
double lon_coords[2][2] = {{20, 25}, {30, 10}};
test_latcxlatc(lon_coords[i][0], -15, // point a
lon_coords[i][1], -15, // point b
lon_coords[i^1][0], -15, // point c
lon_coords[i^1][1], -15, // point d
20, -15, // reference point p
25, -15, // reference point q
p_between_ab + p_between_cd + q_between_ab + q_between_cd +
circles_are_identically); // reference return value
}
// two circles of latitude on the same plane that do not intersect
for (int i = 0; i < 2; ++i) {
double lon_coords[2][2] = {{-80, -70}, {20, 30}};
YAC_LAT_CIRCLE_EDGE, lon_coords[i][0], 10, lon_coords[i][1], 10,
&lon_middle_ab, &lat_middle_ab);
YAC_LAT_CIRCLE_EDGE, lon_coords[i^1][0], 10, lon_coords[i^1][1], 10,
&lon_middle_cd, &lat_middle_cd);
test_latcxlatc(lon_coords[i][0], 10, // point a
lon_coords[i][1], 10, // point b
lon_coords[i^1][0], 10, // point c
lon_coords[i^1][1], 10, // point d
lon_middle_ab, 10, // reference point p
lon_middle_cd, 10, // reference point q
p_between_ab + q_between_cd +
circles_are_identically); // reference return value
}
// two circles of latitude on different planes that do not intersect
for (int i = 0; i < 2; ++i) {
double lat_coords[2] = {0, 5};
test_latcxlatc(20, lat_coords[i], // point a
30, lat_coords[i], // point b
20, lat_coords[i^1], // point c
30, lat_coords[i^1], // point d
-1, -1, // reference point p
-1, -1, // reference point q
-1); // reference return value
test_latcxlatc(-80, lat_coords[i], // point a
-70, lat_coords[i], // point b
20, lat_coords[i^1], // point c
30, lat_coords[i^1], // point d
-1, -1, // reference point p
-1, -1, // reference point q
-1); // reference return value
}
// two circles of latitude on the pole
for (int i = 0; i < 2; ++i) {
double lat_coords[2] = {90, -90};
test_latcxlatc( 0, lat_coords[i], // point a
10, lat_coords[i], // point b
180, lat_coords[i], // point c
190, lat_coords[i], // point d
0, lat_coords[i], // reference point p
0, lat_coords[i^1], // reference point q
p_between_ab + p_between_cd); // reference return value
}
for (int i = 0; i < 2; ++i) {
double lat_coords[2] = {90, -90};
test_latcxlatc( 0, lat_coords[i], // point a
10, lat_coords[i], // point b
5, lat_coords[i], // point c
15, lat_coords[i], // point d
0, lat_coords[i], // reference point p
0, lat_coords[i^1], // reference point q
p_between_ab + p_between_cd); // reference return value
}
// two circles of latitude on different planes with length zero
for (int i = 0; i < 2; ++i) {
double lat_coords[2] = {-10, 10};
test_latcxlatc(45 , lat_coords[i], // point a
45 , lat_coords[i], // point b
90 , lat_coords[i^1], // point c
90 , lat_coords[i^1], // point d
-1 , -1, // reference point p
-1 , -1, // reference point q
-1); // reference return value
}
// two circles of latitude on the same plane that do not intersect
// with length zero
test_latcxlatc(45, 10, // point a
46, 10, // point b
90, 10, // point c
91, 10, // point d
45.5, 10, // reference point p
90.5, 10, // reference point q
p_between_ab + q_between_cd +
circles_are_identically); // reference return value
// two circles of latitude on the same plane that do intersect
// with length zero
test_latcxlatc( 90, 10, // point a
90, 10, // point b
90, 10, // point c
90, 10, // point d
90, 10, // reference point p
-90, -10, // reference point q
p_between_ab + p_between_cd); // reference return value
// two circles of latitude on the same plane, one has the length zero and
// intersects with the other
test_latcxlatc( 0, 10, // point a
0, 10, // point b
-5, 10, // point c
5, 10, // point d
0, 10, // reference point p
180, 10, // reference point q
p_between_ab + p_between_cd); // reference return value
// two circles of latitude on the same plane, one has the length zero and
// does not intersects with the other
test_latcxlatc(180, 10, // point a
180, 10, // point b
-5, 10, // point c
5, 10, // point d
180, 10, // reference point p
0, 10, // reference point q
p_between_ab + q_between_cd); // reference return value
test_latcxlatc( 90, 10, // point a
90, 10, // point b
-5, 10, // point c
5, 10, // point d
90, 10, // reference point p
-90, 10, // reference point q
p_between_ab); // reference return value
return TEST_EXIT_CODE;
}
static void test_latcxlatc(double lon_a, double lat_a, double lon_b, double lat_b,
double lon_c, double lat_c, double lon_d, double lat_d,
double lon_ref_p, double lat_ref_p,
double lon_ref_q, double lat_ref_q, int ref_ret_val) {
test_cxc(lon_a, lat_a, lon_b, lat_b, lon_c, lat_c, lon_d, lat_d,
lon_ref_p, lat_ref_p, lon_ref_q, lat_ref_q, ref_ret_val);
}
static void get_edge_middle_point(struct yac_basic_grid_data *grid, size_t edge_index, double *point)
Definition weights2vtk.c:441
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