mirror of
https://bitbucket.org/cosmicvoids/vide_public.git
synced 2025-07-04 15:21:11 +00:00
121 lines
3.5 KiB
C
121 lines
3.5 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#define DL for (d=0;d<3;d++) /* Dimension loop */
|
|
#define BF 1e30
|
|
|
|
/* Positions */
|
|
/* Returns number of particles read */
|
|
int posread(char *posfile, float ***p, float fact) {
|
|
|
|
FILE *pos;
|
|
int np,dum,d,i;
|
|
float xmin,xmax,ymin,ymax,zmin,zmax;
|
|
float *ptemp;
|
|
|
|
pos = fopen(posfile, "r");
|
|
if (pos == NULL) {
|
|
printf("Unable to open position file %s\n\n",posfile);
|
|
exit(0);
|
|
}
|
|
/* Fortran77 4-byte headers and footers */
|
|
/* Delete "dum" statements if you don't need them */
|
|
|
|
/* Read number of particles */
|
|
fread(&dum,1,4,pos); fread(&np,1, sizeof(int),pos); fread(&dum,1,4,pos);
|
|
|
|
/* Allocate the arrays */
|
|
(*p) = (float **)malloc(np*sizeof(float *));
|
|
ptemp = (float *)malloc(np*sizeof(float));
|
|
|
|
printf("np = %d\n",np);
|
|
|
|
/* Fill the arrays */
|
|
fread(&dum,1,4,pos);
|
|
fread(ptemp,np,4,pos);
|
|
for (i=0; i<np; i++) {
|
|
(*p)[i] = (float *)malloc(3*sizeof(float));
|
|
if ((*p)[i] == NULL) {
|
|
printf("Unable to allocate particle array in readfiles!\n");
|
|
fflush(stdout);
|
|
exit(0);
|
|
}
|
|
(*p)[i][0] = ptemp[i];
|
|
}
|
|
fread(&dum,1,4,pos);
|
|
fread(&dum,1,4,pos);
|
|
fread(ptemp,np,4,pos);
|
|
for (i=0; i<np; i++) (*p)[i][1] = ptemp[i];
|
|
fread(&dum,1,4,pos);
|
|
fread(&dum,1,4,pos);
|
|
fread(ptemp,np,4,pos);
|
|
for (i=0; i<np; i++) (*p)[i][2] = ptemp[i];
|
|
fread(&dum,1,4,pos);
|
|
|
|
fclose(pos);
|
|
free(ptemp);
|
|
|
|
/* Get into physical units (Mpc/h) */
|
|
|
|
|
|
printf("%f\n",fact);fflush(stdout);
|
|
for (i=0; i<np; i++) DL (*p)[i][d] *= fact;
|
|
|
|
/* Test range -- can comment out */
|
|
xmin = BF; xmax = -BF; ymin = BF; ymax = -BF; zmin = BF; zmax = -BF;
|
|
for (i=0; i<np;i++) {
|
|
if ((*p)[i][0]<xmin) xmin = (*p)[i][0]; if ((*p)[i][0]>xmax) xmax = (*p)[i][0];
|
|
if ((*p)[i][1]<ymin) ymin = (*p)[i][1]; if ((*p)[i][1]>ymax) ymax = (*p)[i][1];
|
|
if ((*p)[i][2]<zmin) zmin = (*p)[i][2]; if ((*p)[i][2]>zmax) zmax = (*p)[i][2];
|
|
}
|
|
printf("np: %d, x: %f,%f; y: %f,%f; z: %f,%f\n",np,xmin,xmax, ymin,ymax, zmin,zmax); fflush(stdout);
|
|
|
|
return(np);
|
|
}
|
|
|
|
/* Velocities */
|
|
/* Returns number of particles read */
|
|
/* Used in voboz, but not zobov, which doesn't use velocities */
|
|
int velread(char *velfile, float ***v, float fact) {
|
|
|
|
FILE *vel;
|
|
int np,dum,d,i;
|
|
float xmin,xmax,ymin,ymax,zmin,zmax;
|
|
|
|
vel = fopen(velfile, "r");
|
|
if (vel == NULL) {
|
|
printf("Unable to open velocity file %s\n\n",velfile);
|
|
exit(0);
|
|
}
|
|
/* Fortran77 4-byte headers and footers */
|
|
/* Delete "dum" statements if you don't need them */
|
|
|
|
/* Read number of particles */
|
|
fread(&dum,1,4,vel); fread(&np,1, sizeof(int),vel); fread(&dum,1,4,vel);
|
|
|
|
/* Allocate the arrays */
|
|
(*v) = (float **)malloc(3*sizeof(float*));
|
|
for (i=0;i<3;i++) (*v)[i] = (float *)malloc(np*sizeof(float));
|
|
|
|
/* Fill the arrays */
|
|
fread(&dum,1,4,vel); fread((*v)[0],np,4,vel); fread(&dum,1,4,vel);
|
|
fread(&dum,1,4,vel); fread((*v)[1],np,4,vel); fread(&dum,1,4,vel);
|
|
fread(&dum,1,4,vel); fread((*v)[2],np,4,vel); fread(&dum,1,4,vel);
|
|
|
|
fclose(vel);
|
|
|
|
/* Convert from code units into physical units (km/sec) */
|
|
|
|
for (i=0; i<np; i++) DL (*v)[d][i] *= fact;
|
|
|
|
/* Test range -- can comment out */
|
|
xmin = BF; xmax = -BF; ymin = BF; ymax = -BF; zmin = BF; zmax = -BF;
|
|
for (i=0; i<np;i++) {
|
|
if ((*v)[0][i] < xmin) xmin = (*v)[0][i]; if ((*v)[0][i] > xmax) xmax = (*v)[0][i];
|
|
if ((*v)[1][i] < ymin) ymin = (*v)[1][i]; if ((*v)[1][i] > ymax) ymax = (*v)[1][i];
|
|
if ((*v)[2][i] < zmin) zmin = (*v)[2][i]; if ((*v)[2][i] > zmax) zmax = (*v)[2][i];
|
|
}
|
|
printf("vx: %f,%f; vy: %f,%f; vz: %f,%f\n",xmin,xmax, ymin,ymax, zmin,zmax);
|
|
|
|
return(np);
|
|
}
|