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image_gen.c
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/*
NASA/TRMM, Code 910.1.
This is the TRMM Office Radar Software Library.
Copyright (C) 1996, 1997
John H. Merritt
Space Applications Corporation
Vienna, Virginia
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
*---------------------------------------------------------------------
* Image generation functions:
*
* void RSL_load_color_table(char *infile, char buffer[256], int *ncolors);
* void RSL_load_red_table(char *infile);
* void RSL_load_green_table(char *infile);
* void RSL_load_blue_table(char *infile);
* void RSL_load_refl_color_table();
* void RSL_load_vel_color_table();
* void RSL_load_sw_color_table();
* void RSL_load_height_color_table();
* void RSL_load_rainfall_color_table();
* void RSL_bscan_ray(FILE *fp, Ray *r);
* void RSL_bscan_sweep(Sweep *s, char *outfile);
* void RSL_bscan_volume(Volume *v, char *basename);
* unsigned char *RSL_sweep_to_cart(Sweep *s, int xdim, int ydim, float range);
* unsigned char *RSL_rhi_sweep_to_cart(Sweep *s, int xdim, int ydim, float range, int vert_scale);
* void RSL_write_gif(char *outfile, unsigned char *image, int xdim, int ydim, char c_table[256][3]);
* void RSL_write_pict(char *outfile, unsigned char *image, int xdim, int ydim, char c_table[256][3]);
* void RSL_write_ppm(char *outfile, unsigned char *image, int xdim, int ydim, char c_table[256][3]);
* void RSL_write_pgm(char *outfile, unsigned char *image, int xdim, int ydim);
* void RSL_sweep_to_gif(Sweep *s, char *outfile, int xdim, int ydim, float range);
* void RSL_rhi_sweep_to_gif(Sweep *s, char *outfile, int xdim, int ydim, float range, int vert_scale);
* void RSL_sweep_to_pict(Sweep *s, char *outfile, int xdim, int ydim, float range);
* void RSL_sweep_to_ppm(Sweep *s, char *outfile, int xdim, int ydim, float range);
* void RSL_sweep_to_pgm(Sweep *s, char *outfile, int xdim, int ydim, float range);
* void RSL_volume_to_gif(Volume *v, char *basename, int xdim, int ydim, float range);
* void RSL_volume_to_pict(Volume *v, char *basename, int xdim, int ydim, float range);
* void RSL_volume_to_ppm(Volume *v, char *basename, int xdim, int ydim, float range);
* void RSL_volume_to_pgm(Volume *v, char *basename, int xdim, int ydim, float range);
* void RSL_rebin_velocity_ray(Ray *r);
* void RSL_rebin_velocity_sweep(Sweep *s);
* void RSL_rebin_velocity_volume(Volume *v);
* void RSL_rebin_zdr_ray(Ray *r);
* void RSL_rebin_zdr_sweep(Sweep *s);
* void RSL_rebin_zdr_volume(Volume *v);
*/
#include <stdio.h>
#include <stdlib.h>
#include "rsl.h"
extern FILE *popen(const char *, const char *);
extern int pclose(FILE *stream);
extern int radar_verbose_flag;
static char color_table[256][3];
static int ncolors = 0;
/**********************************************************************/
/* */
/* RSL_load_color_table */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
void RSL_load_color_table(char *infile, char buffer[256], int *num_colors)
{
FILE *fp;
fp = fopen(infile, "r");
if (fp == NULL) {
perror(infile);
exit(-1);
}
*num_colors = fread(buffer, sizeof(char), 256, fp);
(void)fclose(fp);
}
/**********************************************************************/
/* */
/* RSL_set_color_table */
/* */
/* By: John Merritt */
/* SM&A Corporation */
/* Jan 21, 1999 */
/**********************************************************************/
void RSL_set_color_table(int icolor, char buffer[256], int ncolors)
{
int i;
/* In RSL: Red table=RSL_RED_TABLE,
* green table=RSL_GREEN_TABLE,
* blue table=RSL_BLUE_TABLE.
*/
for (i=0; i<ncolors; i++) color_table[i][icolor] = buffer[i];
}
/**********************************************************************/
/* */
/* RSL_get_color_table */
/* */
/* By: John Merritt */
/* SM&A Corporation */
/* Jan 21, 1999 */
/**********************************************************************/
void RSL_get_color_table(int icolor, char buffer[256], int *ncolors)
{
int i;
/* In RSL: Red table=RSL_RED_TABLE,
* green table=RSL_GREEN_TABLE,
* blue table=RSL_BLUE_TABLE.
*/
*ncolors = 256;
for (i=0; i<*ncolors; i++) buffer[i] = color_table[i][icolor];
}
/**********************************************************************/
/* */
/* RSL_load_red_table */
/* RSL_load_green_table */
/* RSL_load_blue_table */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
void RSL_load_red_table(char *infile)
{
char buffer[256];
/* Red only. */
RSL_load_color_table(infile, buffer, &ncolors);
RSL_set_color_table(RSL_RED_TABLE, buffer, ncolors);
}
void RSL_load_green_table(char *infile)
{
char buffer[256];
/* Green only. */
RSL_load_color_table(infile, buffer, &ncolors);
RSL_set_color_table(RSL_GREEN_TABLE, buffer, ncolors);
}
void RSL_load_blue_table(char *infile)
{
char buffer[256];
/* Blue only. */
RSL_load_color_table(infile, buffer, &ncolors);
RSL_set_color_table(RSL_BLUE_TABLE, buffer, ncolors);
}
#include <string.h>
/**********************************************************************/
/* */
/* RSL_load_refl_color_table */
/* RSL_load_vel_color_table */
/* RSL_load_sw_color_table */
/* RSL_load_zdr_color_table */
/* RSL_load_rainfall_color_table */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
void RSL_load_refl_color_table()
{
char buffer[256];
char *fnames[3] = { REFL_RED_FILE, REFL_GREEN_FILE, REFL_BLUE_FILE };
int i, igun;
for (igun=0; igun<3; igun++) {
RSL_load_color_table(fnames[igun], buffer, &ncolors);
for (i=0; i<ncolors; i++) color_table[i][igun] = buffer[i];
}
}
void RSL_load_vel_color_table()
{
char buffer[256];
char *fnames[] = { VEL_RED_FILE, VEL_GREEN_FILE, VEL_BLUE_FILE };
int i, igun;
for (igun=0; igun<3; igun++) {
RSL_load_color_table(fnames[igun], buffer, &ncolors);
for (i=0; i<ncolors; i++) color_table[i][igun] = buffer[i];
}
}
void RSL_load_sw_color_table()
{
char buffer[256];
char *fnames[] = { SW_RED_FILE, SW_GREEN_FILE, SW_BLUE_FILE };
int i, igun;
for (igun=0; igun<3; igun++) {
RSL_load_color_table(fnames[igun], buffer, &ncolors);
for (i=0; i<ncolors; i++) color_table[i][igun] = buffer[i];
}
}
void RSL_load_height_color_table()
{
char buffer[256];
char *fnames[] = { HEIGHT_RED_FILE, HEIGHT_GREEN_FILE, HEIGHT_BLUE_FILE };
int i, igun;
for (igun=0; igun<3; igun++) {
RSL_load_color_table(fnames[igun], buffer, &ncolors);
for (i=0; i<ncolors; i++) color_table[i][igun] = buffer[i];
}
}
void RSL_load_zdr_color_table()
{
char buffer[256];
char *fnames[] = { ZDR_RED_FILE, ZDR_GREEN_FILE, ZDR_BLUE_FILE };
int i, igun;
for (igun=0; igun<3; igun++) {
RSL_load_color_table(fnames[igun], buffer, &ncolors);
for (i=0; i<ncolors; i++) color_table[i][igun] = buffer[i];
}
}
void RSL_load_rainfall_color_table()
{
char buffer[256];
char *fnames[] = { RAINFALL_RED_FILE, RAINFALL_GREEN_FILE, RAINFALL_BLUE_FILE };
int i, igun;
for (igun=0; igun<3; igun++) {
RSL_load_color_table(fnames[igun], buffer, &ncolors);
for (i=0; i<ncolors; i++) color_table[i][igun] = buffer[i];
}
}
/**********************************************************************/
/* */
/* Volume to BSCAN GIF */
/* (simple dump of rays) */
/* RSL_bscan_ray */
/* RSL_bscan_sweep */
/* RSL_bscan_volume */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* March 22, 1994 */
/**********************************************************************/
static unsigned char *outvect;
void RSL_bscan_ray(Ray *r, FILE *fp)
{
int i;
float (*f)(Range x);
if (r == NULL) return;
memset(outvect, 0, r->h.nbins);
f = r->h.f;
for (i=0; i<r->h.nbins; i++)
if (f(r->range[i]) != BADVAL) {
if (f(r->range[i]) >= 0) outvect[i] = (unsigned char) f(r->range[i]);
}
else
outvect[i] = (unsigned char) (255 + f(r->range[i]));
for(i=0; i<r->h.nbins; i++)
(void)fwrite(color_table[outvect[i]], sizeof(char), 3, fp);
}
void RSL_bscan_sweep(Sweep *s, char *outfile)
{
int i, j, nrecs, nbins;
Ray *first_ray;
FILE *fp;
if (s == NULL) return;
fp = fopen(outfile,"w");
if (fp == NULL) {
perror(outfile);
return;
}
first_ray = RSL_get_first_ray_of_sweep(s);
nrecs = s->h.nrays;
nbins = first_ray->h.nbins;
fprintf(fp, "P6\n# %s\n%d %d\n255\n",outfile, nbins, nrecs);
outvect = NULL;
outvect = (unsigned char *) calloc(nbins, sizeof(unsigned char));
if (outvect == NULL) {
perror((char *)outvect);
return;
}
/* Now, write the bscan. */
for (j=0; j<s->h.nrays; j++) {
if (s->ray[j]) RSL_bscan_ray(s->ray[j], fp);
else {
memset(outvect, 0, nbins);
for(i=0; i<nbins; i++)
(void)fwrite(color_table[outvect[i]], sizeof(char), 3, fp);
}
}
free(outvect);
fclose(fp);
}
void RSL_bscan_volume(Volume *v, char *basename)
{
int i;
char *outfile;
RSL_load_refl_color_table();
outfile = (char *)calloc(strlen(basename)+7, sizeof(char));
for (i=0; i<v->h.nsweeps; i++) {
(void)sprintf(outfile,"bscan.%2.2d.ppm", i);
RSL_bscan_sweep(v->sweep[i], outfile);
if (radar_verbose_flag)
fprintf(stderr,"Output: %s\n", outfile);
}
free (outfile);
}
/**********************************************************************/
/**********************************************************************/
/* */
/* Volume to cartesean GIF */
/* (polar to cartesean) */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
/**********************************************************************/
#include <math.h>
/**********************************************************************/
/* */
/* RSL_sweep_to_cart */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
unsigned char *RSL_sweep_to_cart(Sweep *s, int xdim, int ydim, float range)
{
/* Range specifies the maximum range to load that points into the image. */
int x, y;
float azim, r;
float val;
int the_index;
Ray *ray;
float beam_width;
static unsigned char *cart_image = NULL;
if (s == NULL) return NULL;
if (xdim != ydim || ydim < 0 || xdim < 0) {
fprintf(stderr, "(xdim=%d) != (ydim=%d) or either negative.\n", xdim, ydim);
return NULL;
}
cart_image = (unsigned char *) calloc(xdim*ydim, sizeof(unsigned char));
beam_width = s->h.beam_width/2.0 * 1.2;
if (beam_width == 0) beam_width = 1.2; /* Sane image generation. */
for (y=-ydim/2; y<ydim/2; y++)
for (x=-xdim/2; x<xdim/2; x++){/* Find azimuth and range, then search Volume. */
if (x !=0 )
azim = (float)atan((double)y/(double)x)*180.0/3.14159;
else
if (y < 0) azim = -90.0;
else azim = 90.0;
if (y<0 && x<0) /* Quadrant 3 (math notation). */
azim -= 180;
else if (y>=0 && x<0) /* Quad: 2 */
azim += 180;
/* Radar is clockwise increasing. */
azim = -azim;
azim -= 90.0;
if (azim < 0) azim += 360.0;
r = (float)sqrt((double)x*x + (double)y*y);
if (ydim < xdim) r *= range/(.5*ydim);
else r *= range/(.5*xdim);
if (r > range) val = BADVAL;
else {
ray = RSL_get_closest_ray_from_sweep(s, azim, beam_width);
val = RSL_get_value_from_ray(ray, r);
}
the_index = (y+ydim/2)*ydim + (xdim-1)-(x+xdim/2);
if (val == BADVAL || val == NOTFOUND_V || val == NOTFOUND_H)
cart_image[the_index] = (unsigned char) 0;
else if (val >= 0)
cart_image[the_index] = (unsigned char) val;
else
cart_image[the_index] = (unsigned char) (256+val);
}
return cart_image;
}
/**********************************************************************/
/* */
/* RSL_rhi_sweep_to_cart */
/* */
/* A modified version of RSL_sweep_to_cart() */
/* -> Handles rhi (vertical) sweeps */
/* Kolander */
/* Space Applications Corporation */
/* July 27, 1995 */
/**********************************************************************/
unsigned char *RSL_rhi_sweep_to_cart(Sweep *s, int xdim, int ydim,
float range, int vert_scale)
{
int x, y, xx, yy, i, j;
float angle, r;
float val;
int the_index;
static unsigned char *rhi_cart_image = NULL;
static unsigned char *buffer = NULL;
if (s == NULL) return NULL;
if (buffer == NULL)
buffer = (unsigned char *)calloc(xdim*ydim, sizeof(unsigned char));
if (rhi_cart_image == NULL)
rhi_cart_image = (unsigned char *)calloc(xdim*ydim, sizeof(unsigned char));
memset(buffer, (unsigned char)0, xdim*ydim);
memset(rhi_cart_image, (unsigned char)0, xdim*ydim);
for (y=0; y<xdim; y++)
for (x=0; x<ydim; x++){
if (x != 0)
angle = (float)atan((double)y/(double)x)*180.0/3.14159;
else
angle = 90.0;
angle = 90.0 - angle;
r = (float)sqrt((double)x*x + (double)y*y);
if (r > range)
val = BADVAL;
else
val = RSL_get_value_from_sweep(s, angle, r);
/* A vertical sweep extends from 0 deg to perhaps 25 deg in
elevation. For proper orientation of a displayed rhi
vertical sweep:
1. reflect image about the line y=x .
2. translate image downward so that radar site is located
at the bottom left corner of the image. The sweep will
then extend upward from the bottom of the image.
*/
xx = y; /* reflection about line y=x */
yy = x; /* reflection about line y=x */
the_index = (ydim - 1 - yy)*xdim + xx;
if (val == BADVAL || val == NOTFOUND_V || val == NOTFOUND_H)
buffer[the_index] = (unsigned char) 0;
else if (val >= 0)
buffer[the_index] = (unsigned char) val;
else
buffer[the_index] = (unsigned char) (256+val);
}
/* To see details in the sweep, it is customary to scale the image
so that the scale of the vertical axis is 5 or 10 times the scale
of the horizontal axis.
Copy each row of pixel values from buffer[] a constant multiple
number of times into rhi_cart_image[], in order to vertically
expand the image.
*/
for (j=0; j<ydim/vert_scale; j++)
for (i=1; i<=vert_scale; i++)
memcpy(&rhi_cart_image[(ydim - i - vert_scale*j)*xdim],
&buffer[(ydim - 1 - j)*xdim], xdim);
return rhi_cart_image;
}
#include <signal.h>
/**********************************************************************/
/* */
/* RSL_write_gif */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
void RSL_write_gif(char *outfile, unsigned char *image, int xdim, int ydim, char c_table[256][3])
{
int i;
int nbytes;
char pipecmd[300];
FILE *fpipe;
if (image == NULL) {
fprintf(stderr, "No image for file %s\n", outfile);
return;
}
fpipe = NULL;
nbytes = xdim*ydim;
(void)sprintf(pipecmd, "ppmtogif > %s 2>/dev/null", outfile);
fpipe = popen(pipecmd, "w"); /* Global FILE * */
if (fpipe == NULL) {
perror("RSL_write_gif1");
return;
}
if (fprintf(fpipe, "P6\n# %s\n%d %d\n255\n",outfile, xdim, ydim) < 0) {
perror("RSL_write_gif2");
pclose(fpipe);
return;
}
for (i=0; i<nbytes; i++)
if (fwrite(c_table[image[i]], sizeof(char), 3, fpipe) != 3) {
perror("RSL_write_gif3");
pclose(fpipe);
return;
}
if(pclose(fpipe) != 0) perror("RSL_write_gif4");
}
/**********************************************************************/
/* */
/* RSL_write_pict */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
void RSL_write_pict(char *outfile, unsigned char *image, int xdim, int ydim, char c_table[256][3])
{
int i;
int nbytes;
char pipecmd[100];
FILE *fpipe;
if (image == NULL) {
fprintf(stderr, "No image for file %s\n", outfile);
return;
}
nbytes = xdim*ydim;
(void)sprintf(pipecmd, "ppmtopict > %s 2>/dev/null", outfile);
fpipe = popen(pipecmd, "w"); /* Global FILE * */
fprintf(fpipe, "P6\n# %s\n%d %d\n255\n",outfile, xdim, ydim);
for (i=0; i<nbytes; i++) (void)fwrite(c_table[image[i]], sizeof(char), 3, fpipe);
(void)pclose(fpipe);
}
/**********************************************************************/
/* */
/* RSL_write_ppm */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
void RSL_write_ppm(char *outfile, unsigned char *image, int xdim, int ydim, char c_table[256][3])
{
int i;
int nbytes;
FILE *fpipe;
if (image == NULL) {
fprintf(stderr, "No image for file %s\n", outfile);
return;
}
nbytes = xdim*ydim;
fpipe = fopen(outfile, "w"); /* Global FILE * */
fprintf(fpipe, "P6\n# %s\n%d %d\n255\n",outfile, xdim, ydim);
for (i=0; i<nbytes; i++) (void)fwrite(c_table[image[i]], sizeof(char), 3, fpipe);
(void)fclose(fpipe);
}
/**********************************************************************/
/* */
/* RSL_write_pgm */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
void RSL_write_pgm(char *outfile, unsigned char *image, int xdim, int ydim)
{
int nbytes;
char pipecmd[100];
FILE *fpipe;
if (image == NULL) {
fprintf(stderr, "No image for file %s\n", outfile);
return;
}
nbytes = xdim*ydim;
(void)sprintf(pipecmd, "gzip > %s.gz 2>/dev/null", outfile);
fpipe = popen(pipecmd, "w"); /* Global FILE * */
fprintf(fpipe, "P5\n# %s\n%d %d\n255\n",outfile, xdim, ydim);
(void)fwrite(image, sizeof(char), nbytes, fpipe);
(void)pclose(fpipe);
/* The following is commented and is for non compressed. */
#ifdef COMPILE
nbytes = xdim*ydim;
fpipe = fopen(outfile, "w"); /* Global FILE * */
fprintf(fpipe, "P5\n# %s\n%d %d\n255\n",outfile, xdim, ydim);
(void)fwrite(image, sizeof(char), nbytes, fpipe);
(void)fclose(fpipe);
#endif
}
/**********************************************************************/
/* */
/* RSL_sweep_to_gif */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
void RSL_sweep_to_gif(Sweep *s, char *outfile, int xdim, int ydim, float range)
{
/* Currently range is not used. */
unsigned char *cart_image;
/* Assumes the color table is already loaded. */
if (s == NULL) return;
if (ncolors == 0) {
fprintf(stderr, "No colors in color table. Load color table first.\n");
return;
}
cart_image = RSL_sweep_to_cart(s, xdim, ydim, range);
RSL_write_gif(outfile, cart_image, xdim, ydim, color_table);
free(cart_image);
}
/**********************************************************************/
/* */
/* RSL_rhi_sweep_to_gif */
/* */
/* Slightly modified version of RSL_sweep_to_gif() */
/* */
/* By: Kolander */
/* Space Applications Corporation */
/* July 27, 1995 */
/**********************************************************************/
void RSL_rhi_sweep_to_gif(Sweep *s, char *outfile, int xdim, int ydim,
float range, int vert_scale)
{
unsigned char *cart_image;
/* Assumes the color table is already loaded. */
if (s == NULL) return;
if (ncolors == 0) {
fprintf(stderr, "No colors in color table. Load color table first.\n");
return;
}
cart_image = RSL_rhi_sweep_to_cart(s, xdim, ydim, range, vert_scale);
RSL_write_gif(outfile, cart_image, xdim, ydim, color_table);
free(cart_image);
}
/**********************************************************************/
/* */
/* RSL_sweep_to_pict */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
void RSL_sweep_to_pict(Sweep *s, char *outfile, int xdim, int ydim, float range)
{
/* Currently range is not used. */
unsigned char *cart_image;
/* Assumes the color table is already loaded. */
if (s == NULL) return;
if (ncolors == 0) {
fprintf(stderr, "No colors in color table. Load color table first.\n");
return;
}
cart_image = RSL_sweep_to_cart(s, xdim, ydim, range);
RSL_write_pict(outfile, cart_image, xdim, ydim, color_table);
free(cart_image);
}
/**********************************************************************/
/* */
/* RSL_sweep_to_ppm */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
void RSL_sweep_to_ppm(Sweep *s, char *outfile, int xdim, int ydim, float range)
{
/* Currently range is not used. */
unsigned char *cart_image;
/* Assumes the color table is already loaded. */
if (s == NULL) return;
if (ncolors == 0) {
fprintf(stderr, "No colors in color table. Load color table first.\n");
return;
}
cart_image = RSL_sweep_to_cart(s, xdim, ydim, range);
RSL_write_ppm(outfile, cart_image, xdim, ydim, color_table);
free(cart_image);
}
/**********************************************************************/
/* */
/* RSL_sweep_to_pgm */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
void RSL_sweep_to_pgm(Sweep *s, char *outfile, int xdim, int ydim, float range)
{
/* Currently range is not used. */
unsigned char *cart_image;
if (s == NULL) return;
cart_image = RSL_sweep_to_cart(s, xdim, ydim, range);
RSL_write_pgm(outfile, cart_image, xdim, ydim);
free(cart_image);
}
/**********************************************************************/
/* */
/* RSL_volume_to_gif */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
void RSL_volume_to_gif(Volume *v, char *basename, int xdim, int ydim, float range)
{
/*
* Make a xdim by ydim cartesean image. Center of radar is xdim/2,ydim/2.
*/
int i;
char outfile[100];
unsigned char *cart_image;
if (v == NULL) return;
if (ncolors == 0) {
fprintf(stderr, "No colors in color table. Load color table first.\n");
return;
}
/*
* Sweep 0 has Reflectivity only.
* Sweep 1 has Velocity and Spectrum width, No Reflectivity.
* Sweep > 1 any.
*
*/
for (i=0; i<v->h.nsweeps; i++) {
(void)sprintf(outfile,"%s.%2.2d.gif", basename, i); /* File name: sweep.[0-10] */
if (v->sweep[i] == NULL) continue;
cart_image = RSL_sweep_to_cart(v->sweep[i], xdim, ydim, range);
if (radar_verbose_flag)
fprintf(stderr,"==> Sweep %d of %d\n",i, v->h.nsweeps);
if (cart_image != NULL) {
RSL_write_gif(outfile, cart_image, xdim, ydim, color_table);
printf("%s\n", outfile);
free (cart_image);
} else {
if (radar_verbose_flag)
fprintf(stderr,"No image. cart_image for sweep %d is NULL.\n", i);
}
}
}
/**********************************************************************/
/* */
/* RSL_volume_to_pict */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
void RSL_volume_to_pict(Volume *v, char *basename, int xdim, int ydim, float range)
{
/*
* Make a xdim by ydim cartesean image. Center of radar is xdim/2,ydim/2.
*/
int i;
char outfile[100];
unsigned char *cart_image;
if (v == NULL) return;
if (ncolors == 0) {
fprintf(stderr, "No colors in color table. Load color table first.\n");
return;
}
/*
* Sweep 0 has Reflectivity only.
* Sweep 1 has Velocity and Spectrum width, No Reflectivity.
* Sweep > 1 any.
*
*/
for (i=0; i<v->h.nsweeps; i++) {
cart_image = RSL_sweep_to_cart(v->sweep[i], xdim, ydim, range);
if (radar_verbose_flag)
fprintf(stderr,"==> Sweep %d of %d\n",i, v->h.nsweeps);
(void)sprintf(outfile,"%s.%2.2d.pict", basename, i); /* File name: sweep.[0-10] */
if (cart_image != NULL) {
RSL_write_pict(outfile, cart_image, xdim, ydim, color_table);
if (radar_verbose_flag)
fprintf(stderr,"Wrote: %s\n", outfile);
free (cart_image);
} else {
if (radar_verbose_flag)
fprintf(stderr,"No image. cart_image for sweep %d is NULL.\n", i);
}
}
}
/**********************************************************************/
/* */
/* RSL_volume_to_ppm */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
void RSL_volume_to_ppm(Volume *v, char *basename, int xdim, int ydim, float range)
{
/*
* Make a xdim by ydim cartesean image. Center of radar is xdim/2,ydim/2.
*/
int i;
char outfile[100];
unsigned char *cart_image;
if (v == NULL) return;
if (ncolors == 0) {
fprintf(stderr, "No colors in color table. Load color table first.\n");
return;
}
/*
* Sweep 0 has Reflectivity only.
* Sweep 1 has Velocity and Spectrum width, No Reflectivity.
* Sweep > 1 any.
*
*/
for (i=0; i<v->h.nsweeps; i++) {
cart_image = RSL_sweep_to_cart(v->sweep[i], xdim, ydim, range);
if (radar_verbose_flag)
fprintf(stderr,"==> Sweep %d of %d\n",i, v->h.nsweeps);
(void)sprintf(outfile,"%s.%2.2d.ppm", basename, i); /* File name: sweep.[0-10] */
if (cart_image != NULL) {
RSL_write_ppm(outfile, cart_image, xdim, ydim, color_table);
if (radar_verbose_flag)
fprintf(stderr,"Wrote: %s\n", outfile);
free (cart_image);
} else {
if (radar_verbose_flag)
fprintf(stderr,"No image. cart_image for sweep %d is NULL.\n", i);
}
}
}
/**********************************************************************/
/* */
/* RSL_volume_to_pgm */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 7, 1994 */
/**********************************************************************/
void RSL_volume_to_pgm(Volume *v, char *basename, int xdim, int ydim, float range)
{
/*
* Make a xdim by ydim cartesean image. Center of radar is xdim/2,ydim/2.
*/
int i;
char outfile[100];
unsigned char *cart_image;
/*
* Sweep 0 has Reflectivity only.
* Sweep 1 has Velocity and Spectrum width, No Reflectivity.
* Sweep > 1 any.
*
*/
if (v == NULL) return;
for (i=0; i<v->h.nsweeps; i++) {
cart_image = RSL_sweep_to_cart(v->sweep[i], xdim, ydim, range);
if (radar_verbose_flag)
fprintf(stderr,"==> Sweep %d of %d\n",i, v->h.nsweeps);
(void)sprintf(outfile,"%s.%2.2d.pgm", basename, i); /* File name: sweep.[0-10] */
if (cart_image != NULL) {
RSL_write_pgm(outfile, cart_image, xdim, ydim);
if (radar_verbose_flag)
fprintf(stderr,"Wrote: %s\n", outfile);
free (cart_image);
} else {
if (radar_verbose_flag)
fprintf(stderr,"No image. cart_image for sweep %d is NULL.\n", i);
}
}
}
/***********************************************************************/
/* */
/* RSL_rebin_velocity_ray */
/* RSL_rebin_velocity_sweep */
/* RSL_rebin_velocity_volume */
/* */
/* By: John Merritt */
/* Space Applications Corporation */
/* April 30, 1994 */
/* */
/***********************************************************************/
void RSL_rebin_velocity_ray(Ray *r)
{
/* Rebin the velocity data to the range -nyquist, +nyquist.
* 14 bins are created centered at 0. It sets the proper color look up
* indexes. This function modifies Ray r.
*/
int i;
float nyquist;
float val /* val1 */;
int ncbins = 15; /* Number of color bins */
float (*f)(Range x);
Range (*invf)(float x);
if (r == NULL) return;
nyquist = r->h.nyq_vel;
if (nyquist == 0.0) {
fprintf(stderr, "RSL_rebin_velocity_ray: nyquist == 0.0\n");
fprintf(stderr, "RSL_rebin_velocity_ray: Unable to rebin.\n");
return;
}
f = r->h.f;
invf = r->h.invf;
for (i=0; i<r->h.nbins; i++) {
val = f(r->range[i]);
if (val == RFVAL) {
val = 16;
} else if (val != BADVAL) {
/*
Okay, we want to shift the data to positive values
then we re-scale them by the number of color bins/nyquist
*/
val = (int)(val/nyquist*(ncbins/2) + 1.0 + ncbins/2);
} else {
val = 0;
}
r->range[i] = invf(val);
}
}
void RSL_rebin_velocity_sweep(Sweep *s)
{
/* Rebin the velocity data to the range -nyquist, +nyquist.
* 14 bins are created centered at 0. It sets the proper color look up
* indexes. This function modifies Sweep s. Use this function prior
* RSL_sweep_to_cart. The binning is done in RSL_rebin_velocity_ray.
*/
int i;
if (s == NULL) return;
for (i=0; i<s->h.nrays; i++)
RSL_rebin_velocity_ray(s->ray[i]);
}
void RSL_rebin_velocity_volume(Volume *v)
{
/* Rebin the velocity data to the range -nyquist, +nyquist.
* 14 bins are created centered at 0. It sets the proper color look up
* indexes. This function modifies Volume v. Use this function prior
* RSL_sweep_to_cart. The binning is done in RSL_rebin_velocity_ray.
*/
int i;