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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 |
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#define RIGHT 102 |
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#define LEFT 100 |
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#define MAX 200 |
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|
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int NX, NY, MAXNZ, sets; |
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|
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void do_byteswap_f32( float arr[], int nel ), global(), local( int, int ); |
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void readnames( char[] ), readarray( float[], char[], int ), readjet(); |
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void TimerFunction( int ); |
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|
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float data[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; |
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char fns[MAX][MAX]; |
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|
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void menu(int value){ |
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int i; |
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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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local( count, ilev ); // reads new array, set local max/min |
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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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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 for new max/min |
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printf( "Min=" ); scanf( "%f", &mnval ); |
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break; |
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} |
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for( i=0; i<sets; i++){ |
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glutSetWindow(win[i]); |
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glutPostRedisplay(); // display with new values |
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} |
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} |
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|
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void display(void){ |
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int i, j, ioff; |
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float r, g, b, num, k, y; |
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char str[MAX]; |
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glClear( GL_COLOR_BUFFER_BIT ); // background to black |
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|
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ioff=0; // ioff will count thru both i&j b/c data is 1D |
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for( j=0; j<NY; j++ ) |
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for( i=0; i<NX; i++ ){ |
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r=g=b=0; // set color values to black |
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if( data[ioff]==0 ); // if data=0, values stay black |
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else{ |
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if( data[ioff]<mnval ) num=0; // if data is less than min, =min |
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else{ |
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if( data[ioff]>mxval ) num=63; // if data is more than max, =max |
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else |
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num=63*( data[ioff]-mnval )/( mxval-mnval ); //scale num from 0-63 |
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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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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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|
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glColor3f( 1, 1, 1 ); // color to white |
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|
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sprintf( str, "%.4e", mxval ); // labels color bar with max val |
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glRasterPos2f( NX+2, NY-1 ); // sets where to write to |
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for( i=0; i<strlen( str ); i++) // writes each character |
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glutBitmapCharacter( GLUT_BITMAP_HELVETICA_12, str[i] ); |
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|
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str[0]='\0'; // sets str to null |
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|
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sprintf( str, "%.4e", mnval ); // labels color bar with min val |
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glRasterPos2f( NX+2, 1 ); // sets where to write to |
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for( i=0; i<strlen( str ); i++ ) // writes each character |
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glutBitmapCharacter( GLUT_BITMAP_HELVETICA_12, str[i] ); |
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|
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glRectf( 0, NY, NX, NY+1 ); // draws a border |
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glRasterPos2f( 1, NY+6 ); // sets where to write to |
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for( i=0; i<strlen( fns[count] ); i++ ) // labels current file name |
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glutBitmapCharacter( GLUT_BITMAP_HELVETICA_18, fns[count][i] ); |
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|
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str[0]='\0'; // sets str to null |
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|
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sprintf( str, "Level %d", ilev ); // labels current level |
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glRasterPos2f( 1, NY+3 ); // sets where to write to |
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for( i=0; i<strlen( str ); i++ ) // writes each character |
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glutBitmapCharacter( GLUT_BITMAP_HELVETICA_18, str[i] ); |
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|
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str[0]='\0'; //sets str to null |
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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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glRasterPos2f( NX+12, NY+3); |
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for( i=0; i<strlen( str ); i++ ) // write each char of label |
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glutBitmapCharacter( GLUT_BITMAP_HELVETICA_18, str[i] ); |
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|
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str[0]='\0'; |
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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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glRasterPos2f( NX-8, NY+3 ); |
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for(i=0; i<strlen( str ); i++ ) // write each char of label |
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glutBitmapCharacter( GLUT_BITMAP_HELVETICA_18, str[i] ); |
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} |
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|
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glutSwapBuffers(); |
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glFlush(); |
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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; |
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ilev=1; |
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if( glo || usr ) |
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readarray( data, fns[count], ilev ); |
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else |
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local( count, ilev ); |
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for( i=0; i<sets; i++){ |
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glutSetWindow(win[i]); |
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glutPostRedisplay(); |
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} |
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break; |
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case 'a': anim++; // switches autoplay off/on |
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anim=anim%2; // when a is pressed repeatedly |
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for( i=0; i<sets; i++){ |
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glutSetWindow(win[i]); |
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glutPostRedisplay(); |
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} |
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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 ){ |
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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, moves down levels |
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break; |
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case UP : if( ilev>1 ) |
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ilev--; // if up arrow is pressed, moves up levels |
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break; |
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case LEFT : if( count>0 ) |
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count--; // if left arrow is pressed, moves back in time |
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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 in time |
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break; |
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} |
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|
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if( glo || usr ) // if glo or usr is set, read new array w/o |
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readarray( data, fns[count], ilev ); // calculating new max/min |
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else // if local max/min is set |
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local( count, ilev ); // read new array, calculate new max/min |
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|
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for( i=0; i<sets; i++){ |
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glutSetWindow(win[i]); |
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glutPostRedisplay(); // display with new values |
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} |
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|
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switch( value ){ |
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case DOWN : if( ilev<MAXNZ ) // sets limit that you can go down |
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glutTimerFunc( 100, TimerFunction, value ); // recalls itself |
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break; |
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case UP : if( ilev>1 ) // sets limit that you can go up |
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glutTimerFunc( 100, TimerFunction, value ); // recalls itself |
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break; |
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case LEFT : if( count>0 ) // sets limit that you can go left |
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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 ) // sets limit that you can go right |
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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); |
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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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if( glo || usr ) // if global or user-set max/min |
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readarray(data, fns[count], ilev); // read new array w/o new max/min |
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else // if local max/min set |
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local(count, ilev); // read new array and calculate local max/min |
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|
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for(i=0; i<sets; i++){ |
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glutSetWindow(win[i]); |
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glutPostRedisplay(); // display with new values |
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} |
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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 i, j; |
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|
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for( i=0; i<howmany; i++ ) // cycles through each file |
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for( j=0; j<MAXNZ; j++ ){ // cycles through each level for each file |
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local( 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 time, int lev ){ // calculates local max/min |
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int i; |
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|
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mxval=0; |
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mnval=100; |
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readarray( data, fns[time], lev ); // read new array of data |
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for( i=0;i<NX*NY;i++ ){ |
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if( data[i] > mxval ) mxval=data[i]; // set largest val to mxval |
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if( data[i] < mnval ) mnval=data[i]; // set smallest 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 containing data |
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FILE* fp; |
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int i=0; |
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|
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fp=fopen( filename, "r" ); // opens list |
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while( !feof(fp) ){ // reads until the end of the file |
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fscanf( fp, "%s",fns[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; |
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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 level 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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do_byteswap_f32( arr,NX*NY ); // swaps the binary data |
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} |
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|
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void do_byteswap_f32( float arr[], int nel ) // switches endian |
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{ |
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int i; |
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char src[4]; |
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char trg[4]; |
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for( i=0; i<nel; i++ ){ |
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memcpy( src, &(arr[i]), 4); |
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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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} |
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int main( int argc, char *argv[] ){ |
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int i, x, y, tmp; |
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char filename[MAX]; |
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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 ); //user-set NX, NY, NZ |
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printf( "Please enter filename\n" ); |
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scanf( "%s", filename ); //filename contains names of data files |
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printf( "how many data sets?\n" ); |
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scanf( "%d", &sets); |
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|
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readjet(); // stores color values |
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readnames( filename ); // gets list of filenames to read from |
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global(); // calculates max and min for all data |
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local( count, ilev ); // sets curr data array, finds local max/min |
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|
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glutInit( &argc, argv ); // initializes stuff |
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glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE ); |
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glutInitWindowSize( 1400/3, ((NY+15)*1400)/((NX+25)*3) ); // sets window size from NX, NY |
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|
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for(i=0; i<sets; i++){ |
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x=(i%3)*(1400/3); |
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y=(i/3)*((NY+15)*1400)/((NX+25)*3); |
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glutInitWindowPosition( x, y ); |
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win[i]=glutCreateWindow( WINDOW ); // window is created |
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glClearColor( 0, 0, 0, 0 ); // sets clear color to black |
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gluOrtho2D( 0, NX+25, 0, NY+15 ); // sets how data is mapped to window |
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glutDisplayFunc( display ); |
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glutKeyboardFunc( key ); // called on key press |
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glutSpecialFunc( specialkey ); // called on special key press (arrow keys) |
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|
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glutCreateMenu( menu ); // adds a menu |
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glutAddMenuEntry( "Local Color Scale", 1 ); // describes choices |
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glutAddMenuEntry( "Global Color Scale", 2 ); |
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glutAddMenuEntry( "User-Set Color Scale", 3 ); |
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glutAttachMenu( GLUT_RIGHT_BUTTON ); // menu called on right click |
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} |
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|
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glutMainLoop(); |
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return 0; |
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} |
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