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 200 |
12 |
|
13 |
int NX, NY, MAXNZ, sets; |
14 |
int foo; |
15 |
|
16 |
void do_byteswap_f32( float arr[], int nel ), global(), local( int, int ); |
17 |
void readnames( char[] ), readarray( float[], char[], int ), readjet(); |
18 |
void TimerFunction( int ); |
19 |
|
20 |
float data[MAX*MAX], mxval, mnval, jet[MAX][MAX]; |
21 |
float globalmx=0, globalmn=100; |
22 |
int win[MAX], ilev=1, howmany, count=0, glo=0, usr=0, anim=0; |
23 |
char fns[MAX][MAX]; |
24 |
|
25 |
void menu(int value){ |
26 |
int i; |
27 |
|
28 |
switch( value ){ |
29 |
case 1: usr=glo=0; // unset glo & usr, sets local max/min |
30 |
local( count, ilev ); // reads new array, set local max/min |
31 |
break; |
32 |
case 2: glo=1; // enables global max/min |
33 |
usr=0; // unsets usr |
34 |
mxval=globalmx; // sets max to globalmx |
35 |
mnval=globalmn; // sets min to globalmn |
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 for new max/min |
40 |
printf( "Min=" ); scanf( "%f", &mnval ); |
41 |
break; |
42 |
} |
43 |
for( i=0; i<sets; i++){ |
44 |
glutSetWindow(win[i]); |
45 |
glutPostRedisplay(); // display with new values |
46 |
} |
47 |
} |
48 |
|
49 |
void display(void){ |
50 |
int i, j, ioff; |
51 |
float r, g, b, num, k, y; |
52 |
char str[MAX]; |
53 |
glClear( GL_COLOR_BUFFER_BIT ); // background to black |
54 |
|
55 |
ioff=0; // ioff will count thru both i&j b/c data is 1D |
56 |
for( j=0; j<NY; j++ ) |
57 |
for( i=0; i<NX; i++ ){ |
58 |
r=g=b=0; // set color values to black |
59 |
if( data[ioff]==0 ); // if data=0, values stay black |
60 |
else{ |
61 |
if( data[ioff]<mnval ) num=0; // if data is less than min, =min |
62 |
else{ |
63 |
if( data[ioff]>mxval ) num=63; // if data is more than max, =max |
64 |
else |
65 |
num=63*( data[ioff]-mnval )/( mxval-mnval ); //scale num from 0-63 |
66 |
} |
67 |
r=jet[(int)num][0]; // set red val |
68 |
g=jet[(int)num][1]; // set green val |
69 |
b=jet[(int)num][2]; // set blue val |
70 |
} |
71 |
|
72 |
glColor3f( r, g, b ); // put r, g, b into effect |
73 |
glRectf( i, j, i+1, j+1 ); // draws a square for data value |
74 |
ioff++; |
75 |
} |
76 |
|
77 |
glColor3f( 1, 1, 1 ); // set color to white |
78 |
glRectf( NX, 0, NX+1, NY+1 ); // draws a border |
79 |
for( i=0; i<64; i++ ){ //draws color bar |
80 |
glColor3f( jet[i][0], jet[i][1], jet[i][2]); //sets color |
81 |
k=(float)i; // turns i into a float |
82 |
y=(float)NY/64; // sets height of rectangles |
83 |
glRectf( NX+10, y*k, NX+20, (k+1)*y ); // draws rectangle |
84 |
} |
85 |
|
86 |
glColor3f( 1, 1, 1 ); // color to white |
87 |
|
88 |
sprintf( str, "%.4e", mxval ); // labels color bar with max val |
89 |
glRasterPos2f( NX+2, NY-1 ); // sets where to write to |
90 |
for( i=0; i<strlen( str ); i++) // writes each character |
91 |
glutBitmapCharacter( GLUT_BITMAP_HELVETICA_12, str[i] ); |
92 |
|
93 |
str[0]='\0'; // sets str to null |
94 |
|
95 |
sprintf( str, "%.4e", mnval ); // labels color bar with min val |
96 |
glRasterPos2f( NX+2, 1 ); // sets where to write to |
97 |
for( i=0; i<strlen( str ); i++ ) // writes each character |
98 |
glutBitmapCharacter( GLUT_BITMAP_HELVETICA_12, str[i] ); |
99 |
|
100 |
glRectf( 0, NY, NX, NY+1 ); // draws a border |
101 |
glRasterPos2f( 1, NY+6 ); // sets where to write to |
102 |
for( i=0; i<strlen( fns[count] ); i++ ) // labels current file name |
103 |
glutBitmapCharacter( GLUT_BITMAP_HELVETICA_18, fns[count][i] ); |
104 |
|
105 |
str[0]='\0'; // sets str to null |
106 |
|
107 |
sprintf( str, "Level %d", ilev ); // labels current level |
108 |
glRasterPos2f( 1, NY+3 ); // sets where to write to |
109 |
for( i=0; i<strlen( str ); i++ ) // writes each character |
110 |
glutBitmapCharacter( GLUT_BITMAP_HELVETICA_18, str[i] ); |
111 |
|
112 |
str[0]='\0'; //sets str to null |
113 |
|
114 |
if( glo ) // labels how max/min have been set |
115 |
sprintf( str, "Global" ); // if glo is set, display Global |
116 |
if( usr ) |
117 |
sprintf( str, "User-set" ); // if usr is set, display User-set |
118 |
if( !usr && !glo ) |
119 |
sprintf( str, "Local" ); // else display Local |
120 |
glRasterPos2f( NX+12, NY+3); |
121 |
for( i=0; i<strlen( str ); i++ ) // write each char of label |
122 |
glutBitmapCharacter( GLUT_BITMAP_HELVETICA_18, str[i] ); |
123 |
|
124 |
str[0]='\0'; |
125 |
|
126 |
if( anim ){ // tell user if autoplay is on |
127 |
sprintf( str, "Autoplay" ); |
128 |
glRasterPos2f( NX-8, NY+3 ); |
129 |
for(i=0; i<strlen( str ); i++ ) // write each char of label |
130 |
glutBitmapCharacter( GLUT_BITMAP_HELVETICA_18, str[i] ); |
131 |
} |
132 |
|
133 |
glutSwapBuffers(); |
134 |
glFlush(); |
135 |
} |
136 |
|
137 |
void key( unsigned char key, int x, int y ){ //called on key press |
138 |
int i; |
139 |
|
140 |
switch(key){ |
141 |
case 'q': exit(0); //quits on 'q' |
142 |
break; |
143 |
case 'r': count=0; |
144 |
ilev=1; |
145 |
if( glo || usr ) |
146 |
readarray( data, fns[count], ilev ); |
147 |
else |
148 |
local( count, ilev ); |
149 |
for( i=0; i<sets; i++){ |
150 |
glutSetWindow(win[i]); |
151 |
glutPostRedisplay(); |
152 |
} |
153 |
break; |
154 |
case 'a': anim++; // switches autoplay off/on |
155 |
anim=anim%2; // when a is pressed repeatedly |
156 |
for( i=0; i<sets; i++){ |
157 |
glutSetWindow(win[i]); |
158 |
glutPostRedisplay(); |
159 |
} |
160 |
break; |
161 |
} |
162 |
} |
163 |
|
164 |
void TimerFunction( int value ){ |
165 |
int i; |
166 |
|
167 |
switch(value){ // increments in the correct direction |
168 |
case DOWN : if( ilev<MAXNZ ) |
169 |
ilev++; // if down arrow pressed, moves down levels |
170 |
break; |
171 |
case UP : if( ilev>1 ) |
172 |
ilev--; // if up arrow is pressed, moves up levels |
173 |
break; |
174 |
case LEFT : if( count>0 ) |
175 |
count--; // if left arrow is pressed, moves back in time |
176 |
break; |
177 |
case RIGHT: if( count<howmany-1 ) |
178 |
count++; // if right arrow is pressed, moves forward in time |
179 |
break; |
180 |
} |
181 |
|
182 |
if( glo || usr ) // if glo or usr is set, read new array w/o |
183 |
readarray( data, fns[count], ilev ); // calculating new max/min |
184 |
else // if local max/min is set |
185 |
local( count, ilev ); // read new array, calculate new max/min |
186 |
|
187 |
for( i=0; i<sets; i++){ |
188 |
glutSetWindow(win[i]); |
189 |
glutPostRedisplay(); // display with new values |
190 |
} |
191 |
|
192 |
switch( value ){ |
193 |
case DOWN : if( ilev<MAXNZ ) // sets limit that you can go down |
194 |
glutTimerFunc( 100, TimerFunction, value ); // recalls itself |
195 |
break; |
196 |
case UP : if( ilev>1 ) // sets limit that you can go up |
197 |
glutTimerFunc( 100, TimerFunction, value ); // recalls itself |
198 |
break; |
199 |
case LEFT : if( count>0 ) // sets limit that you can go left |
200 |
glutTimerFunc( 100, TimerFunction, value ); // recalls itself |
201 |
break; |
202 |
case RIGHT: if( count<howmany-1 ) // sets limit that you can go right |
203 |
glutTimerFunc( 100, TimerFunction, value ); // recalls itself |
204 |
break; |
205 |
} |
206 |
} |
207 |
|
208 |
void specialkey( int key, int x, int y ){ |
209 |
int i; |
210 |
|
211 |
if( anim ) // if animation is set, call the timer function |
212 |
glutTimerFunc( 100, TimerFunction, key); |
213 |
|
214 |
switch(key){ |
215 |
case DOWN : if( ilev<MAXNZ ) // if you haven't reached the bottom |
216 |
ilev++; // keep going down |
217 |
break; |
218 |
case UP : if( ilev>1 ) // if you haven't reached the top |
219 |
ilev--; // keep going up |
220 |
break; |
221 |
case RIGHT : if( count<howmany-1 ) // if you haven't reached the last file |
222 |
count++; // keep going right |
223 |
break; |
224 |
case LEFT : if( count>0 ) // if you haven't reached the first file |
225 |
count--; // keep going left |
226 |
break; |
227 |
} |
228 |
if( glo || usr ) // if global or user-set max/min |
229 |
readarray(data, fns[count], ilev); // read new array w/o new max/min |
230 |
else // if local max/min set |
231 |
local(count, ilev); // read new array and calculate local max/min |
232 |
|
233 |
for(i=0; i<sets; i++){ |
234 |
glutSetWindow(win[i]); |
235 |
glutPostRedisplay(); // display with new values |
236 |
} |
237 |
} |
238 |
|
239 |
void global(){ // calculates the max/min for the total data set |
240 |
FILE* fp; |
241 |
int i, j; |
242 |
|
243 |
for( i=0; i<howmany; i++ ) // cycles through each file |
244 |
for( j=0; j<MAXNZ; j++ ){ // cycles through each level for each file |
245 |
local( i, j ); // calculates local/max/min for specific data set |
246 |
if( mxval > globalmx ) globalmx = mxval; // sets highest value to globalmx |
247 |
if( mnval < globalmn ) globalmn = mnval; // sets lowest value to globalmn |
248 |
} |
249 |
} |
250 |
|
251 |
void local( int time, int lev ){ // calculates local max/min |
252 |
int i; |
253 |
|
254 |
mxval=0; |
255 |
mnval=100; |
256 |
readarray( data, fns[time], lev ); // read new array of data |
257 |
for( i=0;i<NX*NY;i++ ){ |
258 |
if( data[i] > mxval ) mxval=data[i]; // set largest val to mxval |
259 |
if( data[i] < mnval ) mnval=data[i]; // set smallest val to mnval |
260 |
} |
261 |
} |
262 |
|
263 |
void readnames( char filename[] ){ // reads in list of filenames containing data |
264 |
FILE* fp; |
265 |
int i=0; |
266 |
|
267 |
fp=fopen( filename, "r" ); // opens list |
268 |
while( !feof(fp) ){ // reads until the end of the file |
269 |
fscanf( fp, "%s",fns[i] ); // places filename into an array of strings |
270 |
i++; // counts how many filenames there are |
271 |
} |
272 |
fclose( fp ); // close file |
273 |
howmany=i-1; |
274 |
} |
275 |
|
276 |
void readjet(){ //reads in color scale values |
277 |
|
278 |
FILE* fp; |
279 |
int i, j; |
280 |
|
281 |
fp=fopen( "jet.dat", "r" ); // opens file containing values |
282 |
for( i=0; i<64; i++ ) // reads in 64 sets of r, g, b values |
283 |
for( j=0; j<3; j++ ) |
284 |
fscanf( fp, "%f", &jet[i][j] ); |
285 |
fclose( fp ); // closes file |
286 |
} |
287 |
|
288 |
|
289 |
void readarray( float arr[], char filename[], int il ){ // reads new data |
290 |
FILE *fp; |
291 |
int i; |
292 |
|
293 |
fp=fopen( filename, "r" ); // opens the file containing data |
294 |
fseek( fp, (il-1)*NX*NY*4, SEEK_SET ); // seeks to the correct level using ilev |
295 |
fread( arr, sizeof( arr[0] ), NX*NY, fp ); // reads in data to fill one level |
296 |
fclose( fp ); // close file |
297 |
do_byteswap_f32( arr,NX*NY ); // swaps the binary data |
298 |
} |
299 |
|
300 |
void do_byteswap_f32( float arr[], int nel ) // switches endian |
301 |
{ |
302 |
int i; |
303 |
char src[4]; |
304 |
char trg[4]; |
305 |
for( i=0; i<nel; i++ ){ |
306 |
memcpy( src, &(arr[i]), 4); |
307 |
trg[0]=src[3]; |
308 |
trg[1]=src[2]; |
309 |
trg[2]=src[1]; |
310 |
trg[3]=src[0]; |
311 |
memcpy( &(arr[i]), trg, 4); |
312 |
} |
313 |
} |
314 |
int main( int argc, char *argv[] ){ |
315 |
int i, x, y, tmp; |
316 |
char filename[MAX]; |
317 |
|
318 |
printf( "Please enter x, y and z dimensions\n" ); |
319 |
scanf( "%d %d %d", &NX, &NY, &MAXNZ ); //user-set NX, NY, NZ |
320 |
printf( "Please enter filename\n" ); |
321 |
scanf( "%s", filename ); //filename contains names of data files |
322 |
printf( "how many data sets?\n" ); |
323 |
scanf( "%d", &sets); |
324 |
|
325 |
readjet(); // stores color values |
326 |
readnames( filename ); // gets list of filenames to read from |
327 |
global(); // calculates max and min for all data |
328 |
local( count, ilev ); // sets curr data array, finds local max/min |
329 |
|
330 |
glutInit( &argc, argv ); // initializes stuff |
331 |
glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE ); |
332 |
glutInitWindowSize( 1400/3, ((NY+15)*1400)/((NX+25)*3) ); // sets window size from NX, NY |
333 |
|
334 |
for(i=0; i<sets; i++){ |
335 |
x=(i%3)*(1400/3); |
336 |
y=(i/3)*((NY+15)*1400)/((NX+25)*3); |
337 |
glutInitWindowPosition( x, y ); |
338 |
win[i]=glutCreateWindow( WINDOW ); // window is created |
339 |
glClearColor( 0, 0, 0, 0 ); // sets clear color to black |
340 |
gluOrtho2D( 0, NX+25, 0, NY+15 ); // sets how data is mapped to window |
341 |
glutDisplayFunc( display ); |
342 |
glutKeyboardFunc( key ); // called on key press |
343 |
glutSpecialFunc( specialkey ); // called on special key press (arrow keys) |
344 |
|
345 |
glutCreateMenu( menu ); // adds a menu |
346 |
glutAddMenuEntry( "Local Color Scale", 1 ); // describes choices |
347 |
glutAddMenuEntry( "Global Color Scale", 2 ); |
348 |
glutAddMenuEntry( "User-Set Color Scale", 3 ); |
349 |
glutAttachMenu( GLUT_RIGHT_BUTTON ); // menu called on right click |
350 |
} |
351 |
|
352 |
glutMainLoop(); |
353 |
return 0; |
354 |
} |
355 |
|