darwinview/src/darwin.c

#include <GL/glut.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#define WINDOW "image"
#define UP 101
#define DOWN 103
#define RIGHT 102
#define LEFT 100
#define MAX 700 
 
int NX, NY, NZ;

void do_byteswap_f32( float arr[], int nel ), global(), local( int, int, int );
void readnames( char[] ), readarray( float[], char[], int ), readjet(), readxz( float[], char[] );
void TimerFunction( int ), bitmap( char[], int, int );

float data[MAX][MAX*MAX], mxval, mnval, jet[64][3];
float globalmx=0, globalmn=100;
int win[MAX], ilev=1, howmany, sets, count=0, glo=0, usr=0, anim=0, logscale=0, xz=0, nonegs=1, endian=0;
int xmax, ymax, offset=0;
char initfns[MAX][MAX], fns[MAX][MAX][MAX];

void menu(int value){           // called when menu is opened on right click

 switch( value ){
  case 1: usr=glo=0;            // unset glo & usr, sets local max/min
          glutPostRedisplay();  // recall display func with new values 
          break;
  case 2: glo=1;                // enables global max/min  
          usr=0;                // unsets usr 
          mxval=globalmx;       // sets max to globalmx
          mnval=globalmn;       // sets min to globalmn
          glutPostRedisplay();  // recall display func with new values
          break;
  case 3: usr=1;                // switch to user-set max/min 
          glo=0;                // unset glo
          printf( "Max=" );  scanf( "%f", &mxval );  // prompt user for new max
          printf( "Min=" );  scanf( "%f", &mnval );  // prompt user for new min
          glutPostRedisplay();                       // recall display func with new values
          break;
  case 4: logscale=(logscale+1)%2;  // switch log scale on/off
          glutPostRedisplay();
          break;
  case 5: nonegs=(nonegs+1)%2;      // switch allowance of negatives on/off 
          glutPostRedisplay();
          break;
  case 6: endian=(endian+1)%2;      // switch between big/little endian
          glutPostRedisplay();
          break;
 }
}
void display(){                 // called on glutPostRedisplay
 int i, j, ioff, q; 
 float r, g, b, k, y;
 double num, logmx, logmn;
 char str[MAX]; 

 for( q=0; q<sets; q++ ){           // runs display func for each subwindow
  glutSetWindow( win[q] );          // sets which subwindow to display to
  glClear( GL_COLOR_BUFFER_BIT );   // background to black
  if( xz )   ymax=NZ; 
  else       ymax=NY;

  if( glo || usr ){                  // if global or user-set max/min 
   if( xz )
    readxz( data[q], fns[q][count] );
   else
    readarray( data[q], fns[q][count], ilev );  // read new array w/o calculating local max/min
  }
  else                              // if local max/min is set 
   local( q, count, ilev );         // read new array and calculate local max/min

  if( logscale ){
   if( usr ){
    logmx=(double)mxval;
    logmn=(double)mnval;
   }
   else{
    logmx=log10( mxval );
    logmn=log10( mnval );
   }
  }
 
  ioff=0;                           // ioff will count both i&j b/c data is 1D
  for( j=0; j<ymax; j++ ){            // cycles through y values
   for( i=0; i<xmax; i++ ){           // cycles through x values
    r=g=b=0;                        // set color values to black
    if( data[q][ioff]==0 );           // if data=0, values stay black
    else{
     if( logscale ){
      num=(double)data[q][ioff];
      num=log10( num );
      if( num<logmn ) num=0;
      else{
       if( num>logmx ) num=63;
       else
        num=63*( num-logmn )/( logmx-logmn );
      }
     }
     else{
      if( data[q][ioff]<mnval )  num=0;   // if data is less than min, =min
      else{
       if( data[q][ioff]>mxval )  num=63; // if data is more than max, =max
       else
        num=63*( data[q][ioff]-mnval )/( mxval-mnval );  // scale num from 0-63 (not defined for 64)
      }
     }
     r=jet[(int)num][0];            // set red val
     g=jet[(int)num][1];            // set green val
     b=jet[(int)num][2];            // set blue val  
    }

    glColor3f( r, g, b );           // put r, g, b into effect
    glRectf( i, j, i+1, j+1 );      // draws a square for data value 
    ioff++;                    
   } 
  } 
  glColor3f( 1, 1, 1 );             // set color to white
  glRectf( xmax, 0, xmax+1, ymax+1 );     // draws a border
  glRectf( 0, ymax, xmax, ymax+1 );       // draws a border  
  for( i=0; i<64; i++ ){            // draws color bar    
   glColor3f( jet[i][0], jet[i][1], jet[i][2]);         // sets color
   k=(float)i;                      // turns i into a float
   y=(float)ymax/64;                  // sets height of rectangles
   glRectf( xmax+10, y*k, xmax+20, (k+1)*y );               // draws rectangle 
  } 
  glColor3f( 1, 1, 1 );             // color to white

  if( logscale )
   sprintf( str, "%.2f", logmx );
  else
   sprintf( str, "%.1e", mxval );    // labels color bar with max val
  bitmap( str, xmax+2, ymax-1 );
  
  if( logscale )
   sprintf( str, "%.2f", logmn );
  else
   sprintf( str, "%.1e", mnval );    // labels color bar with min val
  bitmap( str, xmax+2, 1 );

  if( xz )
   sprintf( str, "Y-coordinate=%d", offset+1);
  else
   sprintf( str, "Level %d", ilev ); // labels current level 
  bitmap( str, 1, ymax+3 );

  sprintf( str, "Time %d", count+1 ); // labels current time 
  bitmap( str, 80, ymax+3 );

  if( glo )                         // labels how max/min have been set
   sprintf( str, "Global" );        // if glo is set, display Global
  if( usr ) 
   sprintf( str, "User-set" );      // if usr is set, display User-set
  if( !usr && !glo ) 
   sprintf( str, "Local" );         // else display Local 
  bitmap( str, xmax+12, ymax+3 );
  
  if( anim ){                       // tell user if autoplay is on
   sprintf( str, "Autoplay" );
   bitmap( str, xmax-25, ymax+3 );
  }

  if( logscale ){
   sprintf( str, "Log Scale" );     // tell user if log scale is on
   bitmap( str, xmax-25, ymax+10 ); 
  }

  bitmap( fns[q][count], 1, ymax+10 ); // labels current file
 
  glutSwapBuffers();                // double buffering set to animate smoothly
  glFlush(); 
 }
}

void bitmap( char str[], int x, int y ){  // called to display text onscreen
 int i;

 glRasterPos2f( x, y );             // set position of text
 for( i=0; i<strlen( str ); i++)    // display each character of str
  glutBitmapCharacter( GLUT_BITMAP_HELVETICA_12, str[i] );
}

void key( unsigned char key, int x, int y ){   // called on key press
 int i, tmp;
 
 switch(key){
  case 'q':   exit(0);              // quits on 'q'
              break;
  case 'r':   count=0;              // resets back to first time    
              ilev=1;               // and first level
              glutPostRedisplay();            
              break;
  case 'a':   anim=(anim+1)%2;      // turns anim on/off
              glutPostRedisplay();            
              break;
  case 'x':   xz=(xz+1)%2;
              glutPostRedisplay();
              break;
 } 
}

void TimerFunction( int value ){    // called when anim is set and arrow key is pressed
 int i;

 switch(value){                     // increments in the correct direction
  case DOWN : if( xz ){
               if( offset>0 )
                offset--;
              }
              else{
               if( ilev<NZ ) 
                ilev++;              // if down arrow pressed, move down a level      
              }
              break;
  case UP   : if( xz ){
               if( offset<NY-1 )
                offset++;
              }
              else{
               if( ilev>1 )    
                ilev--;              // if up arrow is pressed, move up a level
              }
              break;
  case LEFT : if( count>0 )      
               count--;             // if left arrow is pressed, move back one time step 
              break;
  case RIGHT: if( count<howmany-1 )
               count++;             // if right arrow is pressed, moves forward one time step 
              break;
 }
 
 glutPostRedisplay();            

 if (anim )
  switch( value ){    
   case DOWN : if( xz ){
                if( offset==0 ) offset=NY-1;
               }
               else{ 
                if( ilev==NZ ) ilev=1;                   // if end reached, restart 
               }
               glutTimerFunc( 100, TimerFunction, value ); // recalls itself
               break;
   case UP   : if( xz ){
                if( offset==NY-1) offset=0;
               }
               else{
                if( ilev==1 ) ilev=NZ;                   // if end reached, restart 
               }
               glutTimerFunc( 100, TimerFunction, value ); // recalls itself 
               break;
   case LEFT : if( count==0 ) count=howmany-1;             // if end reached, restart 
               glutTimerFunc( 100, TimerFunction, value ); // recalls itself
               break;
   case RIGHT: if( count==howmany-1 ) count=0;             // if end reached, restart                 
               glutTimerFunc( 100, TimerFunction, value ); // recalls itself
               break;
  } 
}

void specialkey( int key, int x, int y ){
 int i;

 if( anim )                       // if animation is set, call the timer function
  glutTimerFunc( 100, TimerFunction, key);             // to scroll automatically

 switch(key){
  case DOWN   :  if( xz ){
                  if( offset>0 ) 
                   offset--;
                 }
                 else{ 
                  if( ilev<NZ )      // if you haven't reached the bottom
                   ilev++;              // keep going down
                 } 
                 break;
  case UP     :  if( xz ){
                  if( offset<NY-1 ) 
                   offset++;
                 }
                 else{
                  if( ilev>1 )          // if you haven't reached the top
                   ilev--;              // keep going up
                 }
                 break;
  case RIGHT  :  if( count<howmany-1 ) // if you haven't reached the last file
                  count++;             // keep going right
                 break;
  case LEFT   :  if( count>0 )         // if you haven't reached the first file
                  count--;             // keep going left
                 break;
 }
 glutPostRedisplay();            
}

void global(){                         // calculates the max/min for the total data set
 FILE* fp;
 int h, i, j;
 for( h=0; h<sets; h++)                // cycles through each window 
  for( i=0; i<howmany; i++ )           // cycles through each time 
   for( j=0; j<NZ; j++ ){              // cycles through each level for each file
    local( h, i, j );                  // calculates local max/min for specific data set 
    if( mxval > globalmx ) globalmx = mxval;   // sets highest value to globalmx
    if( mnval < globalmn ) globalmn = mnval;   // sets lowest value to globalmn
   }
}

void local( int i, int time, int lev ){        // calculates local max/min
 int j;
 
 mxval=0;  
 mnval=100;
 if( xz )
  readxz( data[i], fns[i][time]);
 else
  readarray( data[i], fns[i][time], lev );      // read new array of data
 for( j=0; j<xmax*ymax; j++ ){
  if( data[i][j] > mxval ) 
   mxval=data[i][j];                           // set largest val to mxval 
  if( data[i][j] < mnval && data[i][j]!=0 ) 
   mnval=data[i][j];                           // set smallest positive val to mnval 
 }
}

void readnames( char filename[] ){             // reads in list of filenames 
 FILE* fp;
 int i=0, j=0;
 
 fp=fopen( filename, "r" );                    // opens list of filenames
 while( !feof(fp) ){                           // reads until the end of the file 
  fscanf( fp, "%s", initfns[i] );              // places filename into an array of strings 
  i++;                                         // counts how many filenames there are  
 } 
 fclose( fp );                                 // close file
 sets=i-1;                                  // saves number of initial filenames 
 
 for(i=0; i<sets; i++){                     // goes through each read-in filename 
  fp=fopen( initfns[i], "r" );                 // opens each filename  
  j=0;
  while( !feof(fp) ){                          // reads in filenames from each filename 
   fscanf( fp, "%s", fns[i][j]);               
   j++;
  }
  fclose(fp);                                  // close file
 }
 howmany=j-1;                                  // saves number of data filenames  
}

void readjet(){               //reads in color scale values
 FILE* fp;
 int i, j; 
  
 fp=fopen( "jet.dat", "r" );  // opens file containing values
 for( i=0; i<64; i++ )        // reads in 64 sets of r, g, b values
  for( j=0; j<3; j++ )
   fscanf( fp, "%f", &jet[i][j] );
 fclose( fp );                // closes file
}

void readxz( float arr[], char filename[] ){
 int i;
 float tmp[MAX*MAX];
 FILE* fp;
 
 fp=fopen( filename, "rb" );   
 for( i=0; i<NZ; i++){
  fseek( fp, (NX*offset*4)+(i*NX*NY*4), SEEK_SET );
  fread( &arr[NX*i], sizeof( arr[0] ), NX, fp );  // reads in data to fill one level 
 }
 fclose( fp );
 for( i=1; i<NX*NZ+1; i++ )
  tmp[NX*NZ-i]=arr[i-1];
 for( i=0; i<NX*NZ; i++ )
  arr[i]=tmp[i];
}

void readarray( float arr[], char filename[], int il ){   // reads new data
 FILE* fp;
 int i;
 
 fp=fopen( filename, "rb" );                  // opens the file containing data
 fseek( fp, (il-1)*NX*NY*4, SEEK_SET );      // seeks to the correct place using ilev
 fread( arr, sizeof( arr[0] ), NX*NY, fp );  // reads in data to fill one level 
 fclose( fp );                               // close file

 if( nonegs ) 
  for( i=0; i<NX*NY; i++ )                    
   if( arr[i] < 0 ) 
    arr[i] = pow(10, -20);   // sets negative values to 10^-20 

 if( endian )
  do_byteswap_f32( arr, NX*NY );            // switches endian 
}

void do_byteswap_f32( float arr[], int nel ){ // switches endian

 int i;
 char src[4], trg[4];

 for( i=0; i<nel; i++ ){
  memcpy( src, &(arr[i]), 4 );
  trg[0]=src[3];
  trg[1]=src[2];
  trg[2]=src[1];
  trg[3]=src[0];
  memcpy( &(arr[i]), trg, 4 );
 }
}

void black(){
 glClear( GL_COLOR_BUFFER_BIT );
 glutSwapBuffers();
 glFlush(); 
}

int main( int argc, char *argv[] ){
 int i, setsx, setsy, tmpx, tmpy, winx, winy, parent;
 char filename[MAX];

 sscanf( argv[1], "%dx%d", &winx, &winy );  // reads screen resolution from command line
 winy-=60;  winx-=20;                     // adjusts resolution so edges won't get cut off             
 
 printf( "Please enter x, y and z dimensions.\n" );   
 scanf( "%d %d %d", &NX, &NY, &NZ );           // prompts user for NX, NY, NZ
 printf( "Please enter filename.\n" );
 scanf( "%s", filename );                         // prompts user for initial filenames 
 printf( "Please enter dimensions of data sets.\n" );
 scanf( "%dx%d", &setsx, &setsy );                 // prompts user for dimensions of subwindows

 xmax=NX; ymax=NY;

 readjet();                               // stores color values
 readnames( filename );                   // gets list of filenames to read from
 global();                                // calculates max and min for all data

 glutInit( &argc, argv );                 
 glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );   // sets rgb mode and double buffering
 glutInitWindowSize( winx, winy );                // parent window will cover screen
 glutInitWindowPosition( 10, 10 );                // location of parent window
 parent=glutCreateWindow( WINDOW );               // creates parent window

 glClearColor( 0, 0, 0, 0 );                      // sets clear color to black
 gluOrtho2D( 0, winx , winy, 0 );                 // sets(0,0) as top left corner 
 glutDisplayFunc( display );
 glutKeyboardFunc( key );                         // called on key press
 glutSpecialFunc( specialkey );                   // called on special key press (arrow keys)
 

 for( i=0; i<setsx*setsy; i++ ){
  tmpx = (i%setsx)*(winx/setsx);                  // x coordinate of top left corner of subwindow
  tmpy = (i/setsx)*(winy/setsy);                  // y coordinate of top left corner of subwindow 

  win[i]=glutCreateSubWindow( parent, tmpx, tmpy, winx/setsx, winy/setsy ); // creates subwindow
  gluOrtho2D( 0, NX+35, 0, NY+15 );               // sets how data is mapped to subwindow
  glutKeyboardFunc( key );                        // called on key press
  glutSpecialFunc( specialkey );                  // called on special key press (arrow keys)
  if( i >= sets )                                 // 
   glutDisplayFunc( black );
  else
   glutDisplayFunc( display );                     // sets display func for subwindow
  

  glutCreateMenu( menu );                                // adds a menu
   glutAddMenuEntry( "Local Color Scale", 1 );           // adds a menu entry 
   glutAddMenuEntry( "Global Color Scale", 2 );          // adds a menu entry 
   glutAddMenuEntry( "User-Set Color Scale", 3 );        // adds a menu entry 
   glutAddMenuEntry( "Log Scale (on/off)", 4 );          // adds a menu entry 
   glutAddMenuEntry( "Allow Negatives (on/off)", 5 );    // adds a menu entry
   glutAddMenuEntry( "Switch Endian (big/little) ", 6);  // adds a menu entry
  glutAttachMenu( GLUT_RIGHT_BUTTON );                   // menu called on right click
 }

 glutMainLoop();                                  // begin processing events
 return 0;
}

1	marissa	1.1	#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	marissa	1.4	#define MAX 700
12	marissa	1.1
13	marissa	1.3	int NX, NY, NZ;
14	marissa	1.1
15			void do_byteswap_f32( float arr[], int nel ), global(), local( int, int, int );
16	marissa	1.4	void readnames( char[] ), readarray( float[], char[], int ), readjet(), readxz( float[], char[] );
17	marissa	1.1	void TimerFunction( int ), bitmap( char[], int, int );
18
19	marissa	1.4	float data[MAX][MAX*MAX], mxval, mnval, jet[64][3];
20	marissa	1.1	float globalmx=0, globalmn=100;
21	marissa	1.4	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	marissa	1.1	char initfns[MAX][MAX], fns[MAX][MAX][MAX];
24
25	marissa	1.2	void menu(int value){ // called when menu is opened on right click
26	marissa	1.1
27			switch( value ){
28	marissa	1.2	case 1: usr=glo=0; // unset glo & usr, sets local max/min
29			glutPostRedisplay(); // recall display func with new values
30	marissa	1.1	break;
31	marissa	1.2	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	marissa	1.1	break;
37	marissa	1.2	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	marissa	1.1	break;
46	marissa	1.3	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	marissa	1.1	}
53			}
54	marissa	1.4	void display(){ // called on glutPostRedisplay
55	marissa	1.1	int i, j, ioff, q;
56	marissa	1.2	float r, g, b, k, y;
57			double num, logmx, logmn;
58	marissa	1.1	char str[MAX];
59
60	marissa	1.4	for( q=0; q<sets; q++ ){ // runs display func for each subwindow
61	marissa	1.2	glutSetWindow( win[q] ); // sets which subwindow to display to
62			glClear( GL_COLOR_BUFFER_BIT ); // background to black
63	marissa	1.4	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	marissa	1.2	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	marissa	1.4
86	marissa	1.2	ioff=0; // ioff will count both i&j b/c data is 1D
87	marissa	1.4	for( j=0; j<ymax; j++ ){ // cycles through y values
88			for( i=0; i<xmax; i++ ){ // cycles through x values
89	marissa	1.2	r=g=b=0; // set color values to black
90			if( data[q][ioff]==0 ); // if data=0, values stay black
91	marissa	1.1	else{
92	marissa	1.2	if( logscale ){
93			num=(double)data[q][ioff];
94			num=log10( num );
95			if( num<logmn ) num=0;
96	marissa	1.3	else{
97			if( num>logmx ) num=63;
98			else
99			num=63*( num-logmn )/( logmx-logmn );
100			}
101	marissa	1.2	}
102	marissa	1.1	else{
103	marissa	1.2	if( data[q][ioff]<mnval ) num=0; // if data is less than min, =min
104	marissa	1.3	else{
105	marissa	1.2	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	marissa	1.3	}
109	marissa	1.1	}
110	marissa	1.2	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	marissa	1.1	}
114	marissa	1.2
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	marissa	1.1	ioff++;
118			}
119			}
120	marissa	1.2	glColor3f( 1, 1, 1 ); // set color to white
121	marissa	1.4	glRectf( xmax, 0, xmax+1, ymax+1 ); // draws a border
122			glRectf( 0, ymax, xmax, ymax+1 ); // draws a border
123	marissa	1.2	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	marissa	1.4	y=(float)ymax/64; // sets height of rectangles
127			glRectf( xmax+10, yk, xmax+20, (k+1)y ); // draws rectangle
128	marissa	1.1	}
129	marissa	1.2	glColor3f( 1, 1, 1 ); // color to white
130	marissa	1.1
131	marissa	1.2	if( logscale )
132			sprintf( str, "%.2f", logmx );
133			else
134	marissa	1.3	sprintf( str, "%.1e", mxval ); // labels color bar with max val
135	marissa	1.4	bitmap( str, xmax+2, ymax-1 );
136	marissa	1.1
137	marissa	1.2	if( logscale )
138			sprintf( str, "%.2f", logmn );
139			else
140	marissa	1.3	sprintf( str, "%.1e", mnval ); // labels color bar with min val
141	marissa	1.4	bitmap( str, xmax+2, 1 );
142	marissa	1.1
143	marissa	1.4	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	marissa	1.1
149	marissa	1.2	sprintf( str, "Time %d", count+1 ); // labels current time
150	marissa	1.4	bitmap( str, 80, ymax+3 );
151	marissa	1.2
152			if( glo ) // labels how max/min have been set
153			sprintf( str, "Global" ); // if glo is set, display Global
154	marissa	1.1	if( usr )
155	marissa	1.2	sprintf( str, "User-set" ); // if usr is set, display User-set
156	marissa	1.1	if( !usr && !glo )
157	marissa	1.2	sprintf( str, "Local" ); // else display Local
158	marissa	1.4	bitmap( str, xmax+12, ymax+3 );
159	marissa	1.1
160	marissa	1.2	if( anim ){ // tell user if autoplay is on
161	marissa	1.1	sprintf( str, "Autoplay" );
162	marissa	1.4	bitmap( str, xmax-25, ymax+3 );
163	marissa	1.2	}
164
165			if( logscale ){
166			sprintf( str, "Log Scale" ); // tell user if log scale is on
167	marissa	1.4	bitmap( str, xmax-25, ymax+10 );
168	marissa	1.1	}
169
170	marissa	1.4	bitmap( fns[q][count], 1, ymax+10 ); // labels current file
171	marissa	1.1
172	marissa	1.2	glutSwapBuffers(); // double buffering set to animate smoothly
173	marissa	1.1	glFlush();
174			}
175			}
176
177	marissa	1.2	void bitmap( char str[], int x, int y ){ // called to display text onscreen
178	marissa	1.1	int i;
179
180	marissa	1.2	glRasterPos2f( x, y ); // set position of text
181			for( i=0; i<strlen( str ); i++) // display each character of str
182	marissa	1.1	glutBitmapCharacter( GLUT_BITMAP_HELVETICA_12, str[i] );
183			}
184
185	marissa	1.2	void key( unsigned char key, int x, int y ){ // called on key press
186	marissa	1.3	int i, tmp;
187	marissa	1.1
188			switch(key){
189	marissa	1.2	case 'q': exit(0); // quits on 'q'
190	marissa	1.1	break;
191	marissa	1.2	case 'r': count=0; // resets back to first time
192			ilev=1; // and first level
193	marissa	1.1	glutPostRedisplay();
194			break;
195	marissa	1.2	case 'a': anim=(anim+1)%2; // turns anim on/off
196	marissa	1.1	glutPostRedisplay();
197			break;
198	marissa	1.4	case 'x': xz=(xz+1)%2;
199			glutPostRedisplay();
200			break;
201	marissa	1.1	}
202			}
203
204	marissa	1.2	void TimerFunction( int value ){ // called when anim is set and arrow key is pressed
205	marissa	1.1	int i;
206
207	marissa	1.2	switch(value){ // increments in the correct direction
208	marissa	1.4	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	marissa	1.1	break;
217	marissa	1.4	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	marissa	1.1	break;
226			case LEFT : if( count>0 )
227	marissa	1.2	count--; // if left arrow is pressed, move back one time step
228	marissa	1.1	break;
229			case RIGHT: if( count<howmany-1 )
230	marissa	1.2	count++; // if right arrow is pressed, moves forward one time step
231	marissa	1.1	break;
232			}
233
234			glutPostRedisplay();
235
236			if (anim )
237			switch( value ){
238	marissa	1.4	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	marissa	1.1	glutTimerFunc( 100, TimerFunction, value ); // recalls itself
245			break;
246	marissa	1.4	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	marissa	1.1	glutTimerFunc( 100, TimerFunction, value ); // recalls itself
253			break;
254	marissa	1.2	case LEFT : if( count==0 ) count=howmany-1; // if end reached, restart
255	marissa	1.1	glutTimerFunc( 100, TimerFunction, value ); // recalls itself
256			break;
257	marissa	1.2	case RIGHT: if( count==howmany-1 ) count=0; // if end reached, restart
258	marissa	1.1	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	marissa	1.2	if( anim ) // if animation is set, call the timer function
267			glutTimerFunc( 100, TimerFunction, key); // to scroll automatically
268	marissa	1.1
269			switch(key){
270	marissa	1.4	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	marissa	1.1	break;
279	marissa	1.4	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	marissa	1.1	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	marissa	1.2	void global(){ // calculates the max/min for the total data set
299	marissa	1.1	FILE* fp;
300			int h, i, j;
301	marissa	1.3	for( h=0; h<sets; h++) // cycles through each window
302	marissa	1.2	for( i=0; i<howmany; i++ ) // cycles through each time
303	marissa	1.3	for( j=0; j<NZ; j++ ){ // cycles through each level for each file
304	marissa	1.2	local( h, i, j ); // calculates local max/min for specific data set
305	marissa	1.1	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	marissa	1.2	void local( int i, int time, int lev ){ // calculates local max/min
311	marissa	1.1	int j;
312
313			mxval=0;
314			mnval=100;
315	marissa	1.4	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	marissa	1.2	if( data[i][j] > mxval )
321			mxval=data[i][j]; // set largest val to mxval
322	marissa	1.3	if( data[i][j] < mnval && data[i][j]!=0 )
323	marissa	1.2	mnval=data[i][j]; // set smallest positive val to mnval
324	marissa	1.1	}
325			}
326
327	marissa	1.2	void readnames( char filename[] ){ // reads in list of filenames
328	marissa	1.1	FILE* fp;
329			int i=0, j=0;
330
331	marissa	1.2	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	marissa	1.1	}
336	marissa	1.2	fclose( fp ); // close file
337	marissa	1.3	sets=i-1; // saves number of initial filenames
338	marissa	1.1
339	marissa	1.3	for(i=0; i<sets; i++){ // goes through each read-in filename
340	marissa	1.2	fp=fopen( initfns[i], "r" ); // opens each filename
341	marissa	1.1	j=0;
342	marissa	1.2	while( !feof(fp) ){ // reads in filenames from each filename
343			fscanf( fp, "%s", fns[i][j]);
344	marissa	1.1	j++;
345			}
346	marissa	1.2	fclose(fp); // close file
347	marissa	1.1	}
348	marissa	1.2	howmany=j-1; // saves number of data filenames
349	marissa	1.1	}
350
351	marissa	1.2	void readjet(){ //reads in color scale values
352	marissa	1.1	FILE* fp;
353			int i, j;
354
355			fp=fopen( "jet.dat", "r" ); // opens file containing values
356	marissa	1.2	for( i=0; i<64; i++ ) // reads in 64 sets of r, g, b values
357	marissa	1.1	for( j=0; j<3; j++ )
358			fscanf( fp, "%f", &jet[i][j] );
359	marissa	1.2	fclose( fp ); // closes file
360	marissa	1.1	}
361
362	marissa	1.4	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, (NXoffset4)+(iNXNY*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	marissa	1.1	void readarray( float arr[], char filename[], int il ){ // reads new data
380	marissa	1.3	FILE* fp;
381	marissa	1.1	int i;
382
383	marissa	1.4	fp=fopen( filename, "rb" ); // opens the file containing data
384	marissa	1.2	fseek( fp, (il-1)NXNY*4, SEEK_SET ); // seeks to the correct place using ilev
385	marissa	1.1	fread( arr, sizeof( arr[0] ), NX*NY, fp ); // reads in data to fill one level
386	marissa	1.2	fclose( fp ); // close file
387
388	marissa	1.3	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	marissa	1.1	}
396
397	marissa	1.3	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	marissa	1.1	}
417
418			int main( int argc, char *argv[] ){
419	marissa	1.3	int i, setsx, setsy, tmpx, tmpy, winx, winy, parent;
420	marissa	1.1	char filename[MAX];
421
422	marissa	1.3	sscanf( argv[1], "%dx%d", &winx, &winy ); // reads screen resolution from command line
423	marissa	1.2	winy-=60; winx-=20; // adjusts resolution so edges won't get cut off
424	marissa	1.1
425			printf( "Please enter x, y and z dimensions.\n" );
426	marissa	1.3	scanf( "%d %d %d", &NX, &NY, &NZ ); // prompts user for NX, NY, NZ
427	marissa	1.1	printf( "Please enter filename.\n" );
428	marissa	1.2	scanf( "%s", filename ); // prompts user for initial filenames
429	marissa	1.1	printf( "Please enter dimensions of data sets.\n" );
430	marissa	1.3	scanf( "%dx%d", &setsx, &setsy ); // prompts user for dimensions of subwindows
431	marissa	1.1
432	marissa	1.4	xmax=NX; ymax=NY;
433
434	marissa	1.2	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	marissa	1.1
444	marissa	1.2	glClearColor( 0, 0, 0, 0 ); // sets clear color to black
445			gluOrtho2D( 0, winx , winy, 0 ); // sets(0,0) as top left corner
446	marissa	1.1	glutDisplayFunc( display );
447	marissa	1.2	glutKeyboardFunc( key ); // called on key press
448			glutSpecialFunc( specialkey ); // called on special key press (arrow keys)
449	marissa	1.3
450	marissa	1.1
451			for( i=0; i<setsx*setsy; i++ ){
452	marissa	1.2	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	marissa	1.1
455	marissa	1.2	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	marissa	1.3	if( i >= sets ) //
460			glutDisplayFunc( black );
461			else
462			glutDisplayFunc( display ); // sets display func for subwindow
463
464	marissa	1.2
465	marissa	1.3	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	marissa	1.1	}
474
475	marissa	1.2	glutMainLoop(); // begin processing events
476	marissa	1.1	return 0;
477			}
478