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joeri.brackenhoff authoredjoeri.brackenhoff authored
writeSnapTimes3D.c 7.83 KiB
#define _FILE_OFFSET_BITS 64
#define _LARGEFILE_SOURCE
#define _LARGEFILE64_SOURCE
#define ISODD(n) ((n) & 01)
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <math.h>
#include <string.h>
#include "par.h"
#include "segy.h"
#include "fdelmodc3D.h"
/**
* Writes gridded wavefield(s) at a desired time to output file(s)
*
* AUTHOR:
* Jan Thorbecke (janth@xs4all.nl)
* The Netherlands
**/
FILE *fileOpen(char *file, char *ext, int append);
int traceWrite(segy *hdr, float *data, int n, FILE *fp);
#define MAX(x,y) ((x) > (y) ? (x) : (y))
#define MIN(x,y) ((x) < (y) ? (x) : (y))
#define NINT(x) ((long)((x)>0.0?(x)+0.5:(x)-0.5))
long writeSnapTimes3D(modPar mod, snaPar sna, bndPar bnd, wavPar wav,
long ixsrc, long iysrc, long izsrc, long itime, float *vx, float *vy, float *vz,
float *tzz, float *tyy, float *txx, float *txz, float *tyz, float *txy, long verbose)
{
FILE *fpvx, *fpvy, *fpvz, *fptxx, *fptyy, *fptzz, *fptxz, *fptyz, *fptxy, *fpp, *fppp, *fpss;
long append, isnap;
static long first=1;
long n1, n2, ibndx, ibndy, ibndz, ixs, iys, izs, ize, i, j, l;
long ix, iy, iz, ix2, iy2;
float *snap, sdx, stime;
segy hdr;
if (sna.nsnap==0) return 0;
ibndx = mod.ioXx;
ibndy = mod.ioXy;
ibndz = mod.ioXz;
n1 = mod.naz;
n2 = mod.nax;
sdx = 1.0/mod.dx;
if (sna.withbnd) {
sna.nz=mod.naz;
sna.z1=0;
sna.z2=mod.naz-1;
sna.skipdz=1;
sna.ny=mod.nax;
sna.y1=0;
sna.y2=mod.nay-1;
sna.skipdy=1;
sna.nx=mod.nax;
sna.x1=0;
sna.x2=mod.nax-1;
sna.skipdx=1;
}
/* check if this itime is a desired snapshot time */
if ( (((itime-sna.delay) % sna.skipdt)==0) &&
(itime >= sna.delay) &&
(itime <= sna.delay+(sna.nsnap-1)*sna.skipdt) ) {
isnap = NINT((itime-sna.delay)/sna.skipdt);
if (mod.grid_dir) stime = (-wav.nt+1+itime+1)*mod.dt; /* reverse time modeling */
else stime = itime*mod.dt;
if (verbose) vmess("Writing snapshot(%li) at time=%.4f", isnap+1, stime);
if (first) {
append=0;
first=0;
}
else {
append=1;
}
if (sna.type.vx) fpvx = fileOpen(sna.file_snap, "_svx", (int)append);
if (sna.type.vy) fpvy = fileOpen(sna.file_snap, "_svy", (int)append);
if (sna.type.vz) fpvz = fileOpen(sna.file_snap, "_svz", (int)append);
if (sna.type.p) fpp = fileOpen(sna.file_snap, "_sp", (int)append);
if (sna.type.txx) fptxx = fileOpen(sna.file_snap, "_stxx", (int)append);
if (sna.type.tyy) fptyy = fileOpen(sna.file_snap, "_styy", (int)append);
if (sna.type.tzz) fptzz = fileOpen(sna.file_snap, "_stzz", (int)append);
if (sna.type.txz) fptxz = fileOpen(sna.file_snap, "_stxz", (int)append);
if (sna.type.tyz) fptyz = fileOpen(sna.file_snap, "_styz", (int)append);
if (sna.type.txy) fptxy = fileOpen(sna.file_snap, "_stxy", (int)append);
if (sna.type.pp) fppp = fileOpen(sna.file_snap, "_spp", (int)append);
if (sna.type.ss) fpss = fileOpen(sna.file_snap, "_sss", (int)append);
memset(&hdr,0,TRCBYTES);
hdr.dt = 1000000*(sna.skipdt*mod.dt);
hdr.ungpow = (sna.delay*mod.dt);
hdr.scalco = -1000;
hdr.scalel = -1000;
hdr.sx = 1000*(mod.x0+ixsrc*mod.dx);
hdr.sy = 1000*(mod.y0+iysrc*mod.dy);
hdr.sdepth = 1000*(mod.z0+izsrc*mod.dz);
hdr.fldr = isnap+1;
hdr.trid = 1;
hdr.ns = sna.nz;
hdr.trwf = sna.nx*sna.nx;
hdr.ntr = (isnap+1)*sna.nx;
hdr.f1 = sna.z1*mod.dz+mod.z0;
hdr.f2 = sna.x1*mod.dx+mod.x0;
hdr.d1 = mod.dz*sna.skipdz;
hdr.d2 = mod.dx*sna.skipdx;
if (sna.withbnd) {
if ( !ISODD(bnd.top)) hdr.f1 = mod.z0 - bnd.ntap*mod.dz;
if ( !ISODD(bnd.lef)) hdr.f2 = mod.x0 - bnd.ntap*mod.dx;
//if ( !ISODD(bnd.rig)) ;
//if ( !ISODD(bnd.bot)) store=1;
}
/***********************************************************************
* vx velocities have one sample less in x-direction
* vz velocities have one sample less in z-direction
* txz stresses have one sample less in z-direction and x-direction
***********************************************************************/
snap = (float *)malloc(sna.nz*sizeof(float));
/* Decimate, with skipdx and skipdz, the number of gridpoints written to file
and write to file. */
for (iys=sna.y1, l=0; iys<=sna.y2; iys+=sna.skipdy, l++) {
for (ixs=sna.x1, i=0; ixs<=sna.x2; ixs+=sna.skipdx, i++) {
hdr.tracf = l*sna.nx+i+1;
hdr.tracl = isnap*sna.nx*sna.ny+l*sna.nx+i+1; hdr.gx = 1000*(mod.x0+ixs*mod.dx);
hdr.gy = 1000*(mod.y0+iys*mod.dy);
ix = ixs+ibndx;
ix2 = ix+1;
iy = iys+ibndy;
iy2 = iy+1;
izs = sna.z1+ibndz;
ize = sna.z2+ibndz;
if (sna.withbnd) {
izs = 0;
ize = sna.z2;
ix = ixs;
ix2 = ix;
iy = iys;
iy2 = iy;
if (sna.type.vz || sna.type.txz || sna.type.tyz) izs = -1;
if ( !ISODD(bnd.lef)) hdr.gx = 1000*(mod.x0 - bnd.ntap*mod.dx);
if ( !ISODD(bnd.fro)) hdr.gy = 1000*(mod.y0 - bnd.ntap*mod.dy);
}
if (sna.type.vx) {
for (iz=izs, j=0; iz<=ize; iz+=sna.skipdz, j++) {
snap[j] = vx[iy*n1*n2+ix2*n1+iz];
}
traceWrite(&hdr, snap, (int)sna.nz, fpvx);
}
if (sna.type.vy) {
for (iz=izs, j=0; iz<=ize; iz+=sna.skipdz, j++) {
snap[j] = vy[iy2*n1*n2+ix*n1+iz];
}
traceWrite(&hdr, snap, (int)sna.nz, fpvy);
}
if (sna.type.vz) {
for (iz=izs, j=0; iz<=ize; iz+=sna.skipdz, j++) {
snap[j] = vz[iy*n1*n2+ix*n1+iz+1];
}
traceWrite(&hdr, snap, (int)sna.nz, fpvz);
}
if (sna.type.p) {
for (iz=izs, j=0; iz<=ize; iz+=sna.skipdz, j++) {
snap[j] = tzz[iy*n1*n2+ix*n1+iz];
}
traceWrite(&hdr, snap, (int)sna.nz, fpp);
}
if (sna.type.tzz) {
for (iz=izs, j=0; iz<=ize; iz+=sna.skipdz, j++) {
snap[j] = tzz[iy*n1*n2+ix*n1+iz];
}
traceWrite(&hdr, snap, (int)sna.nz, fptzz);
}
if (sna.type.tyy) {
for (iz=izs, j=0; iz<=ize; iz+=sna.skipdz, j++) {
snap[j] = tyy[iy*n1*n2+ix*n1+iz];
}
traceWrite(&hdr, snap, (int)sna.nz, fptyy);
}
if (sna.type.txx) {
for (iz=izs, j=0; iz<=ize; iz+=sna.skipdz, j++) {
snap[j] = txx[iy*n1*n2+ix*n1+iz];
}
traceWrite(&hdr, snap, (int)sna.nz, fptxx);
}
if (sna.type.txz) {
for (iz=izs, j=0; iz<=ize; iz+=sna.skipdz, j++) {
snap[j] = txz[iy*n1*n2+ix2*n1+iz+1];
}
traceWrite(&hdr, snap, (int)sna.nz, fptxz);
} if (sna.type.txy) {
for (iz=izs, j=0; iz<=ize; iz+=sna.skipdz, j++) {
snap[j] = txy[iy2*n1*n2+ix2*n1+iz];
}
traceWrite(&hdr, snap, (int)sna.nz, fptxy);
}
if (sna.type.tyz) {
for (iz=izs, j=0; iz<=ize; iz+=sna.skipdz, j++) {
snap[j] = tyz[iy2*n1*n2+ix*n1+iz+1];
}
traceWrite(&hdr, snap, (int)sna.nz, fptyz);
}
/* calculate divergence of velocity field */
if (sna.type.pp) {
for (iz=izs, j=0; iz<=ize; iz+=sna.skipdz, j++) {
snap[j] = sdx*((vx[iy*n1*n2+(ix+1)*n1+iz]-vx[iy*n1*n2+ix*n1+iz])+
(vy[(iy+1)*n1*n2+ix*n1+iz]-vy[iy*n1*n2+ix*n1+iz])+
(vz[iy*n1*n2+ix*n1+iz+1]-vz[iy*n1*n2+ix*n1+iz]));
}
traceWrite(&hdr, snap, (int)sna.nz, fppp);
}
/* calculate rotation of velocity field */
if (sna.type.ss) {
for (iz=izs, j=0; iz<=ize; iz+=sna.skipdz, j++) {
snap[j] = sdx*((vx[iy*n1*n2+ix*n1+iz]-vx[(iy-1)*n1*n2+ix*n1+iz-1])-
(vy[iy*n1*n2+ix*n1+iz]-vy[iy*n1*n2+(ix-1)*n1+iz-1])-
(vz[iy*n1*n2+ix*n1+iz]-vz[(iy-1)*n1*n2+(ix-1)*n1+iz]));
}
traceWrite(&hdr, snap, (int)sna.nz, fpss);
}
}
}
if (sna.type.vx) fclose(fpvx);
if (sna.type.vy) fclose(fpvy);
if (sna.type.vz) fclose(fpvz);
if (sna.type.p) fclose(fpp);
if (sna.type.txx) fclose(fptxx);
if (sna.type.tyy) fclose(fptyy);
if (sna.type.tzz) fclose(fptzz);
if (sna.type.txz) fclose(fptxz);
if (sna.type.tyz) fclose(fptyz);
if (sna.type.txy) fclose(fptxy);
if (sna.type.pp) fclose(fppp);
if (sna.type.ss) fclose(fpss);
free(snap);
}
return 0;
}