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/* -*- mode: C -*- */
/*
IGraph library.
Copyright (C) 2006-2012 Gabor Csardi <csardi.gabor@gmail.com>
334 Harvard st, Cambridge MA, 02139 USA
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include <igraph.h>
#include <time.h>
#include <stdlib.h>
#include <math.h>
int igraph_i_layout_sphere_2d(igraph_matrix_t *coords, igraph_real_t *x, igraph_real_t *y,
igraph_real_t *r);
int igraph_i_layout_sphere_3d(igraph_matrix_t *coords, igraph_real_t *x, igraph_real_t *y,
igraph_real_t *z, igraph_real_t *r);
int main () {
long int i;
igraph_matrix_t m;
igraph_real_t x, y, z, r;
srand(time(0));
/* 2D */
igraph_matrix_init(&m, 1000, 2);
for (i=0; i<igraph_matrix_nrow(&m); i++) {
MATRIX(m,i,0)=rand()/(double)RAND_MAX;
MATRIX(m,i,1)=rand()/(double)RAND_MAX;
}
igraph_i_layout_sphere_2d(&m, &x, &y, &r);
for (i=0; i<igraph_matrix_nrow(&m); i++) {
igraph_real_t dist=sqrt((MATRIX(m,i,0)-x)*(MATRIX(m,i,0)-x) +
(MATRIX(m,i,1)-y)*(MATRIX(m,i,1)-y));
if (dist > r) {
printf("x: %f y: %f r: %f\n", x, y, r);
printf("x: %f y: %f dist: %f (%li)\n",
MATRIX(m,i,0), MATRIX(m,i,1), dist, i);
return 1;
}
}
igraph_matrix_destroy(&m);
/* 3D */
igraph_matrix_init(&m, 1000, 3);
for (i=0; i<igraph_matrix_nrow(&m); i++) {
MATRIX(m,i,0)=rand()/(double)RAND_MAX;
MATRIX(m,i,1)=rand()/(double)RAND_MAX;
MATRIX(m,i,2)=rand()/(double)RAND_MAX;
}
igraph_i_layout_sphere_3d(&m, &x, &y, &z, &r);
for (i=0; i<igraph_matrix_nrow(&m); i++) {
igraph_real_t dist=sqrt((MATRIX(m,i,0)-x)*(MATRIX(m,i,0)-x) +
(MATRIX(m,i,1)-y)*(MATRIX(m,i,1)-y) +
(MATRIX(m,i,2)-z)*(MATRIX(m,i,2)-z));
if (dist > r) {
printf("x: %f y: %f z: %f r: %f\n", x, y, z, r);
printf("x: %f y: %f z: %f dist: %f (%li)\n",
MATRIX(m,i,0), MATRIX(m,i,1), MATRIX(m,i,2), dist, i);
return 1;
}
}
igraph_matrix_destroy(&m);
return 0;
}
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