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#include <GL/glut.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <math.h> |
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#define WINDOW "image" |
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#define UP 101 |
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#define DOWN 103 |
| 9 |
#define RIGHT 102 |
| 10 |
#define LEFT 100 |
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#define MAX 200 |
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|
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int NX, NY, MAXNZ, setsx, setsy; |
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|
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void do_byteswap_f32( float arr[], int nel ), global(), local( int, int, int ); |
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void readnames( char[] ), readarray( float[], char[], int ), readjet(); |
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void TimerFunction( int ), bitmap( char[], int, int ); |
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|
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float data[MAX][MAX*MAX], mxval, mnval, jet[MAX][MAX]; |
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float globalmx=0, globalmn=100; |
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int win[MAX], ilev=1, howmany, count=0, glo=0, usr=0, anim=0, logscale=0; |
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char initfns[MAX][MAX], fns[MAX][MAX][MAX]; |
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|
| 24 |
void menu(int value){ // called when menu is opened on right click |
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|
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switch( value ){ |
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case 1: usr=glo=0; // unset glo & usr, sets local max/min |
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glutPostRedisplay(); // recall display func with new values |
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break; |
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case 2: glo=1; // enables global max/min |
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usr=0; // unsets usr |
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mxval=globalmx; // sets max to globalmx |
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mnval=globalmn; // sets min to globalmn |
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glutPostRedisplay(); // recall display func with new values |
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break; |
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case 3: usr=1; // switch to user-set max/min |
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glo=0; // unset glo |
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printf( "Max=" ); scanf( "%f", &mxval ); // prompt user for new max |
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printf( "Min=" ); scanf( "%f", &mnval ); // prompt user for new min |
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glutPostRedisplay(); // recall display func with new values |
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break; |
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case 4: logscale=(logscale+1)%2; // switch log scale on/off |
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glutPostRedisplay(); |
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break; |
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} |
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} |
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|
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void display(void){ // called on glutPostRedisplay |
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int i, j, ioff, q; |
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float r, g, b, k, y; |
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double num, logmx, logmn; |
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char str[MAX]; |
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|
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for( q=0; q<setsx*setsy; q++ ){ // runs display func for each subwindow |
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glutSetWindow( win[q] ); // sets which subwindow to display to |
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glClear( GL_COLOR_BUFFER_BIT ); // background to black |
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if( glo || usr ) // if global or user-set max/min |
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readarray( data[q], fns[q][count], ilev ); // read new array w/o calculating local max/min |
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else // if local max/min is set |
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local( q, count, ilev ); // read new array and calculate local max/min |
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|
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if( logscale ){ |
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if( usr ){ |
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logmx=(double)mxval; |
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logmn=(double)mnval; |
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} |
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else{ |
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logmx=log10( mxval ); |
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logmn=log10( mnval ); |
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} |
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} |
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|
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ioff=0; // ioff will count both i&j b/c data is 1D |
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for( j=0; j<NY; j++ ){ // cycles through y values |
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for( i=0; i<NX; i++ ){ // cycles through x values |
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r=g=b=0; // set color values to black |
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if( data[q][ioff]==0 ); // if data=0, values stay black |
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else{ |
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if( logscale ){ |
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num=(double)data[q][ioff]; |
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num=log10( num ); |
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if( num<logmn ) num=0; |
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if( num>logmx ) num=63; |
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else |
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num=63*( num-logmn )/( logmx-logmn ); |
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} |
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else{ |
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if( data[q][ioff]<mnval ) num=0; // if data is less than min, =min |
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else |
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if( data[q][ioff]>mxval ) num=63; // if data is more than max, =max |
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else |
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num=63*( data[q][ioff]-mnval )/( mxval-mnval ); // scale num from 0-63 (not defined for 64) |
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} |
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r=jet[(int)num][0]; // set red val |
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g=jet[(int)num][1]; // set green val |
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b=jet[(int)num][2]; // set blue val |
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} |
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|
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glColor3f( r, g, b ); // put r, g, b into effect |
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glRectf( i, j, i+1, j+1 ); // draws a square for data value |
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ioff++; |
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} |
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} |
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glColor3f( 1, 1, 1 ); // set color to white |
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glRectf( NX, 0, NX+1, NY+1 ); // draws a border |
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glRectf( 0, NY, NX, NY+1 ); // draws a border |
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for( i=0; i<64; i++ ){ // draws color bar |
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glColor3f( jet[i][0], jet[i][1], jet[i][2]); // sets color |
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k=(float)i; // turns i into a float |
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y=(float)NY/64; // sets height of rectangles |
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glRectf( NX+10, y*k, NX+20, (k+1)*y ); // draws rectangle |
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} |
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glColor3f( 1, 1, 1 ); // color to white |
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|
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if( logscale ) |
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sprintf( str, "%.2f", logmx ); |
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else |
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sprintf( str, "%.2e", mxval ); // labels color bar with max val |
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bitmap( str, NX+2, NY-1 ); |
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|
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if( logscale ) |
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sprintf( str, "%.2f", logmn ); |
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else |
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sprintf( str, "%.2e", mnval ); // labels color bar with min val |
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bitmap( str, NX+2, 1 ); |
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|
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sprintf( str, "Level %d", ilev ); // labels current level |
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bitmap( str, 1, NY+3 ); |
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|
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sprintf( str, "Time %d", count+1 ); // labels current time |
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bitmap( str, 50, NY+3 ); |
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|
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if( glo ) // labels how max/min have been set |
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sprintf( str, "Global" ); // if glo is set, display Global |
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if( usr ) |
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sprintf( str, "User-set" ); // if usr is set, display User-set |
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if( !usr && !glo ) |
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sprintf( str, "Local" ); // else display Local |
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bitmap( str, NX+12, NY+3 ); |
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|
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if( anim ){ // tell user if autoplay is on |
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sprintf( str, "Autoplay" ); |
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bitmap( str, NX-25, NY+3 ); |
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} |
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|
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if( logscale ){ |
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sprintf( str, "Log Scale" ); // tell user if log scale is on |
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bitmap( str, NX-25, NY+10 ); |
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} |
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|
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bitmap( fns[q][count], 1, NY+10 ); // labels current file |
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|
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glutSwapBuffers(); // double buffering set to animate smoothly |
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glFlush(); |
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} |
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} |
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|
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void bitmap( char str[], int x, int y ){ // called to display text onscreen |
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int i; |
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|
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glRasterPos2f( x, y ); // set position of text |
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for( i=0; i<strlen( str ); i++) // display each character of str |
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glutBitmapCharacter( GLUT_BITMAP_HELVETICA_12, str[i] ); |
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} |
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|
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void key( unsigned char key, int x, int y ){ // called on key press |
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int i; |
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|
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switch(key){ |
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case 'q': exit(0); // quits on 'q' |
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break; |
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case 'r': count=0; // resets back to first time |
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ilev=1; // and first level |
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glutPostRedisplay(); |
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break; |
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case 'a': anim=(anim+1)%2; // turns anim on/off |
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glutPostRedisplay(); |
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break; |
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} |
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} |
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|
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void TimerFunction( int value ){ // called when anim is set and arrow key is pressed |
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int i; |
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|
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switch(value){ // increments in the correct direction |
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case DOWN : if( ilev<MAXNZ ) |
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ilev++; // if down arrow pressed, move down a level |
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break; |
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case UP : if( ilev>1 ) |
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ilev--; // if up arrow is pressed, move up a level |
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break; |
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case LEFT : if( count>0 ) |
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count--; // if left arrow is pressed, move back one time step |
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break; |
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case RIGHT: if( count<howmany-1 ) |
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count++; // if right arrow is pressed, moves forward one time step |
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break; |
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} |
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|
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glutPostRedisplay(); |
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|
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if (anim ) |
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switch( value ){ |
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case DOWN : if( ilev==MAXNZ ) ilev=1; // if end reached, restart |
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glutTimerFunc( 100, TimerFunction, value ); // recalls itself |
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break; |
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case UP : if( ilev==1 ) ilev=MAXNZ; // if end reached, restart |
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glutTimerFunc( 100, TimerFunction, value ); // recalls itself |
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break; |
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case LEFT : if( count==0 ) count=howmany-1; // if end reached, restart |
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glutTimerFunc( 100, TimerFunction, value ); // recalls itself |
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break; |
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case RIGHT: if( count==howmany-1 ) count=0; // if end reached, restart |
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glutTimerFunc( 100, TimerFunction, value ); // recalls itself |
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break; |
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} |
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} |
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|
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void specialkey( int key, int x, int y ){ |
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int i; |
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|
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if( anim ) // if animation is set, call the timer function |
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glutTimerFunc( 100, TimerFunction, key); // to scroll automatically |
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|
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switch(key){ |
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case DOWN : if( ilev<MAXNZ ) // if you haven't reached the bottom |
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ilev++; // keep going down |
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break; |
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case UP : if( ilev>1 ) // if you haven't reached the top |
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ilev--; // keep going up |
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break; |
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case RIGHT : if( count<howmany-1 ) // if you haven't reached the last file |
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count++; // keep going right |
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break; |
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case LEFT : if( count>0 ) // if you haven't reached the first file |
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count--; // keep going left |
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break; |
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} |
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glutPostRedisplay(); |
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} |
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|
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void global(){ // calculates the max/min for the total data set |
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FILE* fp; |
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int h, i, j; |
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for( h=0; h<setsx*setsy; h++) // cycles through each window |
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for( i=0; i<howmany; i++ ) // cycles through each time |
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for( j=0; j<MAXNZ; j++ ){ // cycles through each level for each file |
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local( h, i, j ); // calculates local max/min for specific data set |
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if( mxval > globalmx ) globalmx = mxval; // sets highest value to globalmx |
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if( mnval < globalmn ) globalmn = mnval; // sets lowest value to globalmn |
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} |
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} |
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|
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void local( int i, int time, int lev ){ // calculates local max/min |
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int j; |
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|
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mxval=0; |
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mnval=100; |
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readarray( data[i], fns[i][time], lev ); // read new array of data |
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for( j=0; j<NX*NY; j++ ){ |
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if( data[i][j] > mxval ) |
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mxval=data[i][j]; // set largest val to mxval |
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if( data[i][j] < mnval && data[i][j] > 0 ) |
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mnval=data[i][j]; // set smallest positive val to mnval |
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} |
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} |
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|
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void readnames( char filename[] ){ // reads in list of filenames |
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FILE* fp; |
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int i=0, j=0; |
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|
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fp=fopen( filename, "r" ); // opens list of filenames |
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while( !feof(fp) ){ // reads until the end of the file |
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fscanf( fp, "%s", initfns[i] ); // places filename into an array of strings |
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i++; // counts how many filenames there are |
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} |
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fclose( fp ); // close file |
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howmany=i-1; // saves number of initial filenames |
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|
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for(i=0; i<howmany; i++){ // goes through each read-in filename |
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fp=fopen( initfns[i], "r" ); // opens each filename |
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j=0; |
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while( !feof(fp) ){ // reads in filenames from each filename |
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fscanf( fp, "%s", fns[i][j]); |
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j++; |
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} |
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fclose(fp); // close file |
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} |
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howmany=j-1; // saves number of data filenames |
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} |
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|
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void readjet(){ //reads in color scale values |
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|
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FILE* fp; |
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int i, j; |
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|
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fp=fopen( "jet.dat", "r" ); // opens file containing values |
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for( i=0; i<64; i++ ) // reads in 64 sets of r, g, b values |
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for( j=0; j<3; j++ ) |
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fscanf( fp, "%f", &jet[i][j] ); |
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fclose( fp ); // closes file |
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} |
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|
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|
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void readarray( float arr[], char filename[], int il ){ // reads new data |
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FILE *fp; |
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int i; |
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|
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fp=fopen( filename, "r" ); // opens the file containing data |
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fseek( fp, (il-1)*NX*NY*4, SEEK_SET ); // seeks to the correct place using ilev |
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fread( arr, sizeof( arr[0] ), NX*NY, fp ); // reads in data to fill one level |
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fclose( fp ); // close file |
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for( i=0; i<NX*NY; i++ ) |
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if( arr[i] < 0 ) arr[i] = pow(10, -20); // sets negative values to 10^-20 |
| 315 |
|
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//do_byteswap_f32( arr, NX*NY ); // switches endian |
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} |
| 318 |
|
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void do_byteswap_f32( float arr[], int nel ) // switches endian |
| 320 |
{ |
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int i; |
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char src[4]; |
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char trg[4]; |
| 324 |
for( i=0; i<nel; i++ ){ |
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memcpy( src, &(arr[i]), 4); |
| 326 |
trg[0]=src[3]; |
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trg[1]=src[2]; |
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trg[2]=src[1]; |
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trg[3]=src[0]; |
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memcpy( &(arr[i]), trg, 4); |
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} |
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} |
| 333 |
|
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int main( int argc, char *argv[] ){ |
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int i, tmpx, tmpy, winx, winy, parent; |
| 336 |
char filename[MAX]; |
| 337 |
|
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sscanf(argv[1], "%dx%d", &winx, &winy); // reads screen resolution from command line |
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winy-=60; winx-=20; // adjusts resolution so edges won't get cut off |
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|
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printf( "Please enter x, y and z dimensions.\n" ); |
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scanf( "%d %d %d", &NX, &NY, &MAXNZ ); // prompts user for NX, NY, NZ |
| 343 |
printf( "Please enter filename.\n" ); |
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scanf( "%s", filename ); // prompts user for initial filenames |
| 345 |
printf( "Please enter dimensions of data sets.\n" ); |
| 346 |
scanf( "%dx%d", &setsx, &setsy); // prompts user for dimensions of subwindows |
| 347 |
|
| 348 |
readjet(); // stores color values |
| 349 |
readnames( filename ); // gets list of filenames to read from |
| 350 |
global(); // calculates max and min for all data |
| 351 |
|
| 352 |
glutInit( &argc, argv ); |
| 353 |
glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE ); // sets rgb mode and double buffering |
| 354 |
glutInitWindowSize( winx, winy ); // parent window will cover screen |
| 355 |
glutInitWindowPosition( 10, 10 ); // location of parent window |
| 356 |
parent=glutCreateWindow( WINDOW ); // creates parent window |
| 357 |
|
| 358 |
glClearColor( 0, 0, 0, 0 ); // sets clear color to black |
| 359 |
gluOrtho2D( 0, winx , winy, 0 ); // sets(0,0) as top left corner |
| 360 |
glutDisplayFunc( display ); |
| 361 |
glutKeyboardFunc( key ); // called on key press |
| 362 |
glutSpecialFunc( specialkey ); // called on special key press (arrow keys) |
| 363 |
|
| 364 |
for( i=0; i<setsx*setsy; i++ ){ |
| 365 |
tmpx = (i%setsx)*(winx/setsx); // x coordinate of top left corner of subwindow |
| 366 |
tmpy = (i/setsx)*(winy/setsy); // y coordinate of top left corner of subwindow |
| 367 |
|
| 368 |
local( i, count, ilev ); // reads curr data array, finds local max/min |
| 369 |
|
| 370 |
win[i]=glutCreateSubWindow( parent, tmpx, tmpy, winx/setsx, winy/setsy ); // creates subwindow |
| 371 |
gluOrtho2D( 0, NX+35, 0, NY+15 ); // sets how data is mapped to subwindow |
| 372 |
glutDisplayFunc( display ); // sets display func for subwindow |
| 373 |
glutKeyboardFunc( key ); // called on key press |
| 374 |
glutSpecialFunc( specialkey ); // called on special key press (arrow keys) |
| 375 |
|
| 376 |
glutCreateMenu( menu ); // adds a menu |
| 377 |
glutAddMenuEntry( "Local Color Scale", 1 ); // adds a menu entry |
| 378 |
glutAddMenuEntry( "Global Color Scale", 2 ); // adds a menu entry |
| 379 |
glutAddMenuEntry( "User-Set Color Scale", 3 ); // adds a menu entry |
| 380 |
glutAddMenuEntry( "Log Scale (on/off)", 4 ); // adds a menu entry |
| 381 |
glutAttachMenu( GLUT_RIGHT_BUTTON ); // menu called on right click |
| 382 |
} |
| 383 |
|
| 384 |
glutMainLoop(); // begin processing events |
| 385 |
return 0; |
| 386 |
} |
| 387 |
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