| 1 |
#include <GL/glut.h> |
| 2 |
#include <stdlib.h> |
| 3 |
#include <stdio.h> |
| 4 |
#include <string.h> |
| 5 |
#include <math.h> |
| 6 |
#define WINDOW "image" |
| 7 |
#define UP 101 |
| 8 |
#define DOWN 103 |
| 9 |
#define RIGHT 102 |
| 10 |
#define LEFT 100 |
| 11 |
#define MAX 700 |
| 12 |
|
| 13 |
int NX, NY, NZ; |
| 14 |
|
| 15 |
void do_byteswap_f32( float arr[], int nel ), global(), local( int, int, int ); |
| 16 |
void readnames( char[] ), readarray( float[], char[], int ), readjet(), readxz( float[], char[] ); |
| 17 |
void TimerFunction( int ), bitmap( char[], int, int ); |
| 18 |
|
| 19 |
float data[MAX][MAX*MAX], mxval, mnval, jet[64][3]; |
| 20 |
float globalmx=0, globalmn=100; |
| 21 |
int win[MAX], ilev=1, howmany, sets, count=0, glo=0, usr=0, anim=0, logscale=0, xz=0, nonegs=1, endian=0; |
| 22 |
int xmax, ymax, offset=0; |
| 23 |
char initfns[MAX][MAX], fns[MAX][MAX][MAX]; |
| 24 |
|
| 25 |
void menu(int value){ // called when menu is opened on right click |
| 26 |
|
| 27 |
switch( value ){ |
| 28 |
case 1: usr=glo=0; // unset glo & usr, sets local max/min |
| 29 |
glutPostRedisplay(); // recall display func with new values |
| 30 |
break; |
| 31 |
case 2: glo=1; // enables global max/min |
| 32 |
usr=0; // unsets usr |
| 33 |
mxval=globalmx; // sets max to globalmx |
| 34 |
mnval=globalmn; // sets min to globalmn |
| 35 |
glutPostRedisplay(); // recall display func with new values |
| 36 |
break; |
| 37 |
case 3: usr=1; // switch to user-set max/min |
| 38 |
glo=0; // unset glo |
| 39 |
printf( "Max=" ); scanf( "%f", &mxval ); // prompt user for new max |
| 40 |
printf( "Min=" ); scanf( "%f", &mnval ); // prompt user for new min |
| 41 |
glutPostRedisplay(); // recall display func with new values |
| 42 |
break; |
| 43 |
case 4: logscale=(logscale+1)%2; // switch log scale on/off |
| 44 |
glutPostRedisplay(); |
| 45 |
break; |
| 46 |
case 5: nonegs=(nonegs+1)%2; // switch allowance of negatives on/off |
| 47 |
glutPostRedisplay(); |
| 48 |
break; |
| 49 |
case 6: endian=(endian+1)%2; // switch between big/little endian |
| 50 |
glutPostRedisplay(); |
| 51 |
break; |
| 52 |
} |
| 53 |
} |
| 54 |
void display(){ // called on glutPostRedisplay |
| 55 |
int i, j, ioff, q; |
| 56 |
float r, g, b, k, y; |
| 57 |
double num, logmx, logmn; |
| 58 |
char str[MAX]; |
| 59 |
|
| 60 |
for( q=0; q<sets; q++ ){ // runs display func for each subwindow |
| 61 |
glutSetWindow( win[q] ); // sets which subwindow to display to |
| 62 |
glClear( GL_COLOR_BUFFER_BIT ); // background to black |
| 63 |
if( xz ) ymax=NZ; |
| 64 |
else ymax=NY; |
| 65 |
|
| 66 |
if( glo || usr ){ // if global or user-set max/min |
| 67 |
if( xz ) |
| 68 |
readxz( data[q], fns[q][count] ); |
| 69 |
else |
| 70 |
readarray( data[q], fns[q][count], ilev ); // read new array w/o calculating local max/min |
| 71 |
} |
| 72 |
else // if local max/min is set |
| 73 |
local( q, count, ilev ); // read new array and calculate local max/min |
| 74 |
|
| 75 |
if( logscale ){ |
| 76 |
if( usr ){ |
| 77 |
logmx=(double)mxval; |
| 78 |
logmn=(double)mnval; |
| 79 |
} |
| 80 |
else{ |
| 81 |
logmx=log10( mxval ); |
| 82 |
logmn=log10( mnval ); |
| 83 |
} |
| 84 |
} |
| 85 |
|
| 86 |
ioff=0; // ioff will count both i&j b/c data is 1D |
| 87 |
for( j=0; j<ymax; j++ ){ // cycles through y values |
| 88 |
for( i=0; i<xmax; i++ ){ // cycles through x values |
| 89 |
r=g=b=0; // set color values to black |
| 90 |
if( data[q][ioff]==0 ); // if data=0, values stay black |
| 91 |
else{ |
| 92 |
if( logscale ){ |
| 93 |
num=(double)data[q][ioff]; |
| 94 |
num=log10( num ); |
| 95 |
if( num<logmn ) num=0; |
| 96 |
else{ |
| 97 |
if( num>logmx ) num=63; |
| 98 |
else |
| 99 |
num=63*( num-logmn )/( logmx-logmn ); |
| 100 |
} |
| 101 |
} |
| 102 |
else{ |
| 103 |
if( data[q][ioff]<mnval ) num=0; // if data is less than min, =min |
| 104 |
else{ |
| 105 |
if( data[q][ioff]>mxval ) num=63; // if data is more than max, =max |
| 106 |
else |
| 107 |
num=63*( data[q][ioff]-mnval )/( mxval-mnval ); // scale num from 0-63 (not defined for 64) |
| 108 |
} |
| 109 |
} |
| 110 |
r=jet[(int)num][0]; // set red val |
| 111 |
g=jet[(int)num][1]; // set green val |
| 112 |
b=jet[(int)num][2]; // set blue val |
| 113 |
} |
| 114 |
|
| 115 |
glColor3f( r, g, b ); // put r, g, b into effect |
| 116 |
glRectf( i, j, i+1, j+1 ); // draws a square for data value |
| 117 |
ioff++; |
| 118 |
} |
| 119 |
} |
| 120 |
glColor3f( 1, 1, 1 ); // set color to white |
| 121 |
glRectf( xmax, 0, xmax+1, ymax+1 ); // draws a border |
| 122 |
glRectf( 0, ymax, xmax, ymax+1 ); // draws a border |
| 123 |
for( i=0; i<64; i++ ){ // draws color bar |
| 124 |
glColor3f( jet[i][0], jet[i][1], jet[i][2]); // sets color |
| 125 |
k=(float)i; // turns i into a float |
| 126 |
y=(float)ymax/64; // sets height of rectangles |
| 127 |
glRectf( xmax+10, y*k, xmax+20, (k+1)*y ); // draws rectangle |
| 128 |
} |
| 129 |
glColor3f( 1, 1, 1 ); // color to white |
| 130 |
|
| 131 |
if( logscale ) |
| 132 |
sprintf( str, "%.2f", logmx ); |
| 133 |
else |
| 134 |
sprintf( str, "%.1e", mxval ); // labels color bar with max val |
| 135 |
bitmap( str, xmax+2, ymax-1 ); |
| 136 |
|
| 137 |
if( logscale ) |
| 138 |
sprintf( str, "%.2f", logmn ); |
| 139 |
else |
| 140 |
sprintf( str, "%.1e", mnval ); // labels color bar with min val |
| 141 |
bitmap( str, xmax+2, 1 ); |
| 142 |
|
| 143 |
if( xz ) |
| 144 |
sprintf( str, "Y-coordinate=%d", offset+1); |
| 145 |
else |
| 146 |
sprintf( str, "Level %d", ilev ); // labels current level |
| 147 |
bitmap( str, 1, ymax+3 ); |
| 148 |
|
| 149 |
sprintf( str, "Time %d", count+1 ); // labels current time |
| 150 |
bitmap( str, 80, ymax+3 ); |
| 151 |
|
| 152 |
if( glo ) // labels how max/min have been set |
| 153 |
sprintf( str, "Global" ); // if glo is set, display Global |
| 154 |
if( usr ) |
| 155 |
sprintf( str, "User-set" ); // if usr is set, display User-set |
| 156 |
if( !usr && !glo ) |
| 157 |
sprintf( str, "Local" ); // else display Local |
| 158 |
bitmap( str, xmax+12, ymax+3 ); |
| 159 |
|
| 160 |
if( anim ){ // tell user if autoplay is on |
| 161 |
sprintf( str, "Autoplay" ); |
| 162 |
bitmap( str, xmax-25, ymax+3 ); |
| 163 |
} |
| 164 |
|
| 165 |
if( logscale ){ |
| 166 |
sprintf( str, "Log Scale" ); // tell user if log scale is on |
| 167 |
bitmap( str, xmax-25, ymax+10 ); |
| 168 |
} |
| 169 |
|
| 170 |
bitmap( fns[q][count], 1, ymax+10 ); // labels current file |
| 171 |
|
| 172 |
glutSwapBuffers(); // double buffering set to animate smoothly |
| 173 |
glFlush(); |
| 174 |
} |
| 175 |
} |
| 176 |
|
| 177 |
void bitmap( char str[], int x, int y ){ // called to display text onscreen |
| 178 |
int i; |
| 179 |
|
| 180 |
glRasterPos2f( x, y ); // set position of text |
| 181 |
for( i=0; i<strlen( str ); i++) // display each character of str |
| 182 |
glutBitmapCharacter( GLUT_BITMAP_HELVETICA_12, str[i] ); |
| 183 |
} |
| 184 |
|
| 185 |
void key( unsigned char key, int x, int y ){ // called on key press |
| 186 |
int i, tmp; |
| 187 |
|
| 188 |
switch(key){ |
| 189 |
case 'q': exit(0); // quits on 'q' |
| 190 |
break; |
| 191 |
case 'r': count=0; // resets back to first time |
| 192 |
ilev=1; // and first level |
| 193 |
glutPostRedisplay(); |
| 194 |
break; |
| 195 |
case 'a': anim=(anim+1)%2; // turns anim on/off |
| 196 |
glutPostRedisplay(); |
| 197 |
break; |
| 198 |
case 'x': xz=(xz+1)%2; |
| 199 |
glutPostRedisplay(); |
| 200 |
break; |
| 201 |
} |
| 202 |
} |
| 203 |
|
| 204 |
void TimerFunction( int value ){ // called when anim is set and arrow key is pressed |
| 205 |
int i; |
| 206 |
|
| 207 |
switch(value){ // increments in the correct direction |
| 208 |
case DOWN : if( xz ){ |
| 209 |
if( offset>0 ) |
| 210 |
offset--; |
| 211 |
} |
| 212 |
else{ |
| 213 |
if( ilev<NZ ) |
| 214 |
ilev++; // if down arrow pressed, move down a level |
| 215 |
} |
| 216 |
break; |
| 217 |
case UP : if( xz ){ |
| 218 |
if( offset<NY-1 ) |
| 219 |
offset++; |
| 220 |
} |
| 221 |
else{ |
| 222 |
if( ilev>1 ) |
| 223 |
ilev--; // if up arrow is pressed, move up a level |
| 224 |
} |
| 225 |
break; |
| 226 |
case LEFT : if( count>0 ) |
| 227 |
count--; // if left arrow is pressed, move back one time step |
| 228 |
break; |
| 229 |
case RIGHT: if( count<howmany-1 ) |
| 230 |
count++; // if right arrow is pressed, moves forward one time step |
| 231 |
break; |
| 232 |
} |
| 233 |
|
| 234 |
glutPostRedisplay(); |
| 235 |
|
| 236 |
if (anim ) |
| 237 |
switch( value ){ |
| 238 |
case DOWN : if( xz ){ |
| 239 |
if( offset==0 ) offset=NY-1; |
| 240 |
} |
| 241 |
else{ |
| 242 |
if( ilev==NZ ) ilev=1; // if end reached, restart |
| 243 |
} |
| 244 |
glutTimerFunc( 100, TimerFunction, value ); // recalls itself |
| 245 |
break; |
| 246 |
case UP : if( xz ){ |
| 247 |
if( offset==NY-1) offset=0; |
| 248 |
} |
| 249 |
else{ |
| 250 |
if( ilev==1 ) ilev=NZ; // if end reached, restart |
| 251 |
} |
| 252 |
glutTimerFunc( 100, TimerFunction, value ); // recalls itself |
| 253 |
break; |
| 254 |
case LEFT : if( count==0 ) count=howmany-1; // if end reached, restart |
| 255 |
glutTimerFunc( 100, TimerFunction, value ); // recalls itself |
| 256 |
break; |
| 257 |
case RIGHT: if( count==howmany-1 ) count=0; // if end reached, restart |
| 258 |
glutTimerFunc( 100, TimerFunction, value ); // recalls itself |
| 259 |
break; |
| 260 |
} |
| 261 |
} |
| 262 |
|
| 263 |
void specialkey( int key, int x, int y ){ |
| 264 |
int i; |
| 265 |
|
| 266 |
if( anim ) // if animation is set, call the timer function |
| 267 |
glutTimerFunc( 100, TimerFunction, key); // to scroll automatically |
| 268 |
|
| 269 |
switch(key){ |
| 270 |
case DOWN : if( xz ){ |
| 271 |
if( offset>0 ) |
| 272 |
offset--; |
| 273 |
} |
| 274 |
else{ |
| 275 |
if( ilev<NZ ) // if you haven't reached the bottom |
| 276 |
ilev++; // keep going down |
| 277 |
} |
| 278 |
break; |
| 279 |
case UP : if( xz ){ |
| 280 |
if( offset<NY-1 ) |
| 281 |
offset++; |
| 282 |
} |
| 283 |
else{ |
| 284 |
if( ilev>1 ) // if you haven't reached the top |
| 285 |
ilev--; // keep going up |
| 286 |
} |
| 287 |
break; |
| 288 |
case RIGHT : if( count<howmany-1 ) // if you haven't reached the last file |
| 289 |
count++; // keep going right |
| 290 |
break; |
| 291 |
case LEFT : if( count>0 ) // if you haven't reached the first file |
| 292 |
count--; // keep going left |
| 293 |
break; |
| 294 |
} |
| 295 |
glutPostRedisplay(); |
| 296 |
} |
| 297 |
|
| 298 |
void global(){ // calculates the max/min for the total data set |
| 299 |
FILE* fp; |
| 300 |
int h, i, j; |
| 301 |
for( h=0; h<sets; h++) // cycles through each window |
| 302 |
for( i=0; i<howmany; i++ ) // cycles through each time |
| 303 |
for( j=0; j<NZ; j++ ){ // cycles through each level for each file |
| 304 |
local( h, i, j ); // calculates local max/min for specific data set |
| 305 |
if( mxval > globalmx ) globalmx = mxval; // sets highest value to globalmx |
| 306 |
if( mnval < globalmn ) globalmn = mnval; // sets lowest value to globalmn |
| 307 |
} |
| 308 |
} |
| 309 |
|
| 310 |
void local( int i, int time, int lev ){ // calculates local max/min |
| 311 |
int j; |
| 312 |
|
| 313 |
mxval=0; |
| 314 |
mnval=100; |
| 315 |
if( xz ) |
| 316 |
readxz( data[i], fns[i][time]); |
| 317 |
else |
| 318 |
readarray( data[i], fns[i][time], lev ); // read new array of data |
| 319 |
for( j=0; j<xmax*ymax; j++ ){ |
| 320 |
if( data[i][j] > mxval ) |
| 321 |
mxval=data[i][j]; // set largest val to mxval |
| 322 |
if( data[i][j] < mnval && data[i][j]!=0 ) |
| 323 |
mnval=data[i][j]; // set smallest positive val to mnval |
| 324 |
} |
| 325 |
} |
| 326 |
|
| 327 |
void readnames( char filename[] ){ // reads in list of filenames |
| 328 |
FILE* fp; |
| 329 |
int i=0, j=0; |
| 330 |
|
| 331 |
fp=fopen( filename, "r" ); // opens list of filenames |
| 332 |
while( !feof(fp) ){ // reads until the end of the file |
| 333 |
fscanf( fp, "%s", initfns[i] ); // places filename into an array of strings |
| 334 |
i++; // counts how many filenames there are |
| 335 |
} |
| 336 |
fclose( fp ); // close file |
| 337 |
sets=i-1; // saves number of initial filenames |
| 338 |
|
| 339 |
for(i=0; i<sets; i++){ // goes through each read-in filename |
| 340 |
fp=fopen( initfns[i], "r" ); // opens each filename |
| 341 |
j=0; |
| 342 |
while( !feof(fp) ){ // reads in filenames from each filename |
| 343 |
fscanf( fp, "%s", fns[i][j]); |
| 344 |
j++; |
| 345 |
} |
| 346 |
fclose(fp); // close file |
| 347 |
} |
| 348 |
howmany=j-1; // saves number of data filenames |
| 349 |
} |
| 350 |
|
| 351 |
void readjet(){ //reads in color scale values |
| 352 |
FILE* fp; |
| 353 |
int i, j; |
| 354 |
|
| 355 |
fp=fopen( "jet.dat", "r" ); // opens file containing values |
| 356 |
for( i=0; i<64; i++ ) // reads in 64 sets of r, g, b values |
| 357 |
for( j=0; j<3; j++ ) |
| 358 |
fscanf( fp, "%f", &jet[i][j] ); |
| 359 |
fclose( fp ); // closes file |
| 360 |
} |
| 361 |
|
| 362 |
void readxz( float arr[], char filename[] ){ |
| 363 |
int i; |
| 364 |
float tmp[MAX*MAX]; |
| 365 |
FILE* fp; |
| 366 |
|
| 367 |
fp=fopen( filename, "rb" ); |
| 368 |
for( i=0; i<NZ; i++){ |
| 369 |
fseek( fp, (NX*offset*4)+(i*NX*NY*4), SEEK_SET ); |
| 370 |
fread( &arr[NX*i], sizeof( arr[0] ), NX, fp ); // reads in data to fill one level |
| 371 |
} |
| 372 |
fclose( fp ); |
| 373 |
for( i=1; i<NX*NZ+1; i++ ) |
| 374 |
tmp[NX*NZ-i]=arr[i-1]; |
| 375 |
for( i=0; i<NX*NZ; i++ ) |
| 376 |
arr[i]=tmp[i]; |
| 377 |
} |
| 378 |
|
| 379 |
void readarray( float arr[], char filename[], int il ){ // reads new data |
| 380 |
FILE* fp; |
| 381 |
int i; |
| 382 |
|
| 383 |
fp=fopen( filename, "rb" ); // opens the file containing data |
| 384 |
fseek( fp, (il-1)*NX*NY*4, SEEK_SET ); // seeks to the correct place using ilev |
| 385 |
fread( arr, sizeof( arr[0] ), NX*NY, fp ); // reads in data to fill one level |
| 386 |
fclose( fp ); // close file |
| 387 |
|
| 388 |
if( nonegs ) |
| 389 |
for( i=0; i<NX*NY; i++ ) |
| 390 |
if( arr[i] < 0 ) |
| 391 |
arr[i] = pow(10, -20); // sets negative values to 10^-20 |
| 392 |
|
| 393 |
if( endian ) |
| 394 |
do_byteswap_f32( arr, NX*NY ); // switches endian |
| 395 |
} |
| 396 |
|
| 397 |
void do_byteswap_f32( float arr[], int nel ){ // switches endian |
| 398 |
|
| 399 |
int i; |
| 400 |
char src[4], trg[4]; |
| 401 |
|
| 402 |
for( i=0; i<nel; i++ ){ |
| 403 |
memcpy( src, &(arr[i]), 4 ); |
| 404 |
trg[0]=src[3]; |
| 405 |
trg[1]=src[2]; |
| 406 |
trg[2]=src[1]; |
| 407 |
trg[3]=src[0]; |
| 408 |
memcpy( &(arr[i]), trg, 4 ); |
| 409 |
} |
| 410 |
} |
| 411 |
|
| 412 |
void black(){ |
| 413 |
glClear( GL_COLOR_BUFFER_BIT ); |
| 414 |
glutSwapBuffers(); |
| 415 |
glFlush(); |
| 416 |
} |
| 417 |
|
| 418 |
int main( int argc, char *argv[] ){ |
| 419 |
int i, setsx, setsy, tmpx, tmpy, winx, winy, parent; |
| 420 |
char filename[MAX]; |
| 421 |
|
| 422 |
sscanf( argv[1], "%dx%d", &winx, &winy ); // reads screen resolution from command line |
| 423 |
winy-=60; winx-=20; // adjusts resolution so edges won't get cut off |
| 424 |
|
| 425 |
printf( "Please enter x, y and z dimensions.\n" ); |
| 426 |
scanf( "%d %d %d", &NX, &NY, &NZ ); // prompts user for NX, NY, NZ |
| 427 |
printf( "Please enter filename.\n" ); |
| 428 |
scanf( "%s", filename ); // prompts user for initial filenames |
| 429 |
printf( "Please enter dimensions of data sets.\n" ); |
| 430 |
scanf( "%dx%d", &setsx, &setsy ); // prompts user for dimensions of subwindows |
| 431 |
|
| 432 |
xmax=NX; ymax=NY; |
| 433 |
|
| 434 |
readjet(); // stores color values |
| 435 |
readnames( filename ); // gets list of filenames to read from |
| 436 |
global(); // calculates max and min for all data |
| 437 |
|
| 438 |
glutInit( &argc, argv ); |
| 439 |
glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE ); // sets rgb mode and double buffering |
| 440 |
glutInitWindowSize( winx, winy ); // parent window will cover screen |
| 441 |
glutInitWindowPosition( 10, 10 ); // location of parent window |
| 442 |
parent=glutCreateWindow( WINDOW ); // creates parent window |
| 443 |
|
| 444 |
glClearColor( 0, 0, 0, 0 ); // sets clear color to black |
| 445 |
gluOrtho2D( 0, winx , winy, 0 ); // sets(0,0) as top left corner |
| 446 |
glutDisplayFunc( display ); |
| 447 |
glutKeyboardFunc( key ); // called on key press |
| 448 |
glutSpecialFunc( specialkey ); // called on special key press (arrow keys) |
| 449 |
|
| 450 |
|
| 451 |
for( i=0; i<setsx*setsy; i++ ){ |
| 452 |
tmpx = (i%setsx)*(winx/setsx); // x coordinate of top left corner of subwindow |
| 453 |
tmpy = (i/setsx)*(winy/setsy); // y coordinate of top left corner of subwindow |
| 454 |
|
| 455 |
win[i]=glutCreateSubWindow( parent, tmpx, tmpy, winx/setsx, winy/setsy ); // creates subwindow |
| 456 |
gluOrtho2D( 0, NX+35, 0, NY+15 ); // sets how data is mapped to subwindow |
| 457 |
glutKeyboardFunc( key ); // called on key press |
| 458 |
glutSpecialFunc( specialkey ); // called on special key press (arrow keys) |
| 459 |
if( i >= sets ) // |
| 460 |
glutDisplayFunc( black ); |
| 461 |
else |
| 462 |
glutDisplayFunc( display ); // sets display func for subwindow |
| 463 |
|
| 464 |
|
| 465 |
glutCreateMenu( menu ); // adds a menu |
| 466 |
glutAddMenuEntry( "Local Color Scale", 1 ); // adds a menu entry |
| 467 |
glutAddMenuEntry( "Global Color Scale", 2 ); // adds a menu entry |
| 468 |
glutAddMenuEntry( "User-Set Color Scale", 3 ); // adds a menu entry |
| 469 |
glutAddMenuEntry( "Log Scale (on/off)", 4 ); // adds a menu entry |
| 470 |
glutAddMenuEntry( "Allow Negatives (on/off)", 5 ); // adds a menu entry |
| 471 |
glutAddMenuEntry( "Switch Endian (big/little) ", 6); // adds a menu entry |
| 472 |
glutAttachMenu( GLUT_RIGHT_BUTTON ); // menu called on right click |
| 473 |
} |
| 474 |
|
| 475 |
glutMainLoop(); // begin processing events |
| 476 |
return 0; |
| 477 |
} |
| 478 |
|
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