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 200
 
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();
void TimerFunction( int ), bitmap( char[], int, int );

float data[MAX][MAX*MAX], mxval, mnval, jet[MAX][MAX];
float globalmx=0, globalmn=100;
int win[MAX], ilev=1, howmany, sets, count=0, glo=0, usr=0, anim=0, logscale=0, nonegs=1, endian=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(void){                 // 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( glo || usr )                  // if global or user-set max/min 
   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<NY; j++ ){            // cycles through y values
   for( i=0; i<NX; 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( NX, 0, NX+1, NY+1 );     // draws a border
  glRectf( 0, NY, NX, NY+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)NY/64;                  // sets height of rectangles
   glRectf( NX+10, y*k, NX+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, NX+2, NY-1 );
  
  if( logscale )
   sprintf( str, "%.2f", logmn );
  else
   sprintf( str, "%.1e", mnval );    // labels color bar with min val
  bitmap( str, NX+2, 1 );

  sprintf( str, "Level %d", ilev ); // labels current level 
  bitmap( str, 1, NY+3 );

  sprintf( str, "Time %d", count+1 ); // labels current time 
  bitmap( str, 50, NY+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, NX+12, NY+3 );
  
  if( anim ){                       // tell user if autoplay is on
   sprintf( str, "Autoplay" );
   bitmap( str, NX-25, NY+3 );
  }

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

  bitmap( fns[q][count], 1, NY+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;
 } 
}

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( ilev<NZ ) 
               ilev++;              // if down arrow pressed, move down a level      
              break;
  case UP   : 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( ilev==NZ ) ilev=1;                   // if end reached, restart 
               glutTimerFunc( 100, TimerFunction, value ); // recalls itself
               break;
   case UP   : 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( ilev<NZ )      // if you haven't reached the bottom
                  ilev++;              // keep going down
                 break;
  case UP     :  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;
 readarray( data[i], fns[i][time], lev );      // read new array of data
 for( j=0; j<NX*NY; 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 readarray( float arr[], char filename[], int il ){   // reads new data
 FILE* fp;
 int i;
 
 fp=fopen( filename, "r" );                  // 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

 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			#define MAX 200
12
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			void readnames( char[] ), readarray( float[], char[], int ), readjet();
17			void TimerFunction( int ), bitmap( char[], int, int );
18
19			float data[MAX][MAX*MAX], mxval, mnval, jet[MAX][MAX];
20			float globalmx=0, globalmn=100;
21	marissa	1.3	int win[MAX], ilev=1, howmany, sets, count=0, glo=0, usr=0, anim=0, logscale=0, nonegs=1, endian=0;
22	marissa	1.1	char initfns[MAX][MAX], fns[MAX][MAX][MAX];
23
24	marissa	1.2	void menu(int value){ // called when menu is opened on right click
25	marissa	1.1
26			switch( value ){
27	marissa	1.2	case 1: usr=glo=0; // unset glo & usr, sets local max/min
28			glutPostRedisplay(); // recall display func with new values
29	marissa	1.1	break;
30	marissa	1.2	case 2: glo=1; // enables global max/min
31			usr=0; // unsets usr
32			mxval=globalmx; // sets max to globalmx
33			mnval=globalmn; // sets min to globalmn
34			glutPostRedisplay(); // recall display func with new values
35	marissa	1.1	break;
36	marissa	1.2	case 3: usr=1; // switch to user-set max/min
37			glo=0; // unset glo
38			printf( "Max=" ); scanf( "%f", &mxval ); // prompt user for new max
39			printf( "Min=" ); scanf( "%f", &mnval ); // prompt user for new min
40			glutPostRedisplay(); // recall display func with new values
41			break;
42			case 4: logscale=(logscale+1)%2; // switch log scale on/off
43			glutPostRedisplay();
44	marissa	1.1	break;
45	marissa	1.3	case 5: nonegs=(nonegs+1)%2; // switch allowance of negatives on/off
46			glutPostRedisplay();
47			break;
48			case 6: endian=(endian+1)%2; // switch between big/little endian
49			glutPostRedisplay();
50			break;
51	marissa	1.1	}
52			}
53	marissa	1.2	void display(void){ // called on glutPostRedisplay
54	marissa	1.1	int i, j, ioff, q;
55	marissa	1.2	float r, g, b, k, y;
56			double num, logmx, logmn;
57	marissa	1.1	char str[MAX];
58
59	marissa	1.3	for( q=0; q<sets; q++ ){ // runs display func for each subwindow
60	marissa	1.2	glutSetWindow( win[q] ); // sets which subwindow to display to
61			glClear( GL_COLOR_BUFFER_BIT ); // background to black
62			if( glo \|\| usr ) // if global or user-set max/min
63			readarray( data[q], fns[q][count], ilev ); // read new array w/o calculating local max/min
64			else // if local max/min is set
65			local( q, count, ilev ); // read new array and calculate local max/min
66
67			if( logscale ){
68			if( usr ){
69			logmx=(double)mxval;
70			logmn=(double)mnval;
71			}
72			else{
73			logmx=log10( mxval );
74			logmn=log10( mnval );
75			}
76			}
77
78			ioff=0; // ioff will count both i&j b/c data is 1D
79			for( j=0; j<NY; j++ ){ // cycles through y values
80			for( i=0; i<NX; i++ ){ // cycles through x values
81			r=g=b=0; // set color values to black
82			if( data[q][ioff]==0 ); // if data=0, values stay black
83	marissa	1.1	else{
84	marissa	1.2	if( logscale ){
85			num=(double)data[q][ioff];
86			num=log10( num );
87			if( num<logmn ) num=0;
88	marissa	1.3	else{
89			if( num>logmx ) num=63;
90			else
91			num=63*( num-logmn )/( logmx-logmn );
92			}
93	marissa	1.2	}
94	marissa	1.1	else{
95	marissa	1.2	if( data[q][ioff]<mnval ) num=0; // if data is less than min, =min
96	marissa	1.3	else{
97	marissa	1.2	if( data[q][ioff]>mxval ) num=63; // if data is more than max, =max
98			else
99			num=63*( data[q][ioff]-mnval )/( mxval-mnval ); // scale num from 0-63 (not defined for 64)
100	marissa	1.3	}
101	marissa	1.1	}
102	marissa	1.2	r=jet[(int)num][0]; // set red val
103			g=jet[(int)num][1]; // set green val
104			b=jet[(int)num][2]; // set blue val
105	marissa	1.1	}
106	marissa	1.2
107			glColor3f( r, g, b ); // put r, g, b into effect
108			glRectf( i, j, i+1, j+1 ); // draws a square for data value
109	marissa	1.1	ioff++;
110			}
111			}
112	marissa	1.2	glColor3f( 1, 1, 1 ); // set color to white
113			glRectf( NX, 0, NX+1, NY+1 ); // draws a border
114			glRectf( 0, NY, NX, NY+1 ); // draws a border
115			for( i=0; i<64; i++ ){ // draws color bar
116			glColor3f( jet[i][0], jet[i][1], jet[i][2]); // sets color
117			k=(float)i; // turns i into a float
118			y=(float)NY/64; // sets height of rectangles
119			glRectf( NX+10, yk, NX+20, (k+1)y ); // draws rectangle
120	marissa	1.1	}
121	marissa	1.2	glColor3f( 1, 1, 1 ); // color to white
122	marissa	1.1
123	marissa	1.2	if( logscale )
124			sprintf( str, "%.2f", logmx );
125			else
126	marissa	1.3	sprintf( str, "%.1e", mxval ); // labels color bar with max val
127	marissa	1.1	bitmap( str, NX+2, NY-1 );
128
129	marissa	1.2	if( logscale )
130			sprintf( str, "%.2f", logmn );
131			else
132	marissa	1.3	sprintf( str, "%.1e", mnval ); // labels color bar with min val
133	marissa	1.1	bitmap( str, NX+2, 1 );
134
135	marissa	1.2	sprintf( str, "Level %d", ilev ); // labels current level
136			bitmap( str, 1, NY+3 );
137	marissa	1.1
138	marissa	1.2	sprintf( str, "Time %d", count+1 ); // labels current time
139			bitmap( str, 50, NY+3 );
140
141			if( glo ) // labels how max/min have been set
142			sprintf( str, "Global" ); // if glo is set, display Global
143	marissa	1.1	if( usr )
144	marissa	1.2	sprintf( str, "User-set" ); // if usr is set, display User-set
145	marissa	1.1	if( !usr && !glo )
146	marissa	1.2	sprintf( str, "Local" ); // else display Local
147			bitmap( str, NX+12, NY+3 );
148	marissa	1.1
149	marissa	1.2	if( anim ){ // tell user if autoplay is on
150	marissa	1.1	sprintf( str, "Autoplay" );
151	marissa	1.2	bitmap( str, NX-25, NY+3 );
152			}
153
154			if( logscale ){
155			sprintf( str, "Log Scale" ); // tell user if log scale is on
156			bitmap( str, NX-25, NY+10 );
157	marissa	1.1	}
158
159	marissa	1.2	bitmap( fns[q][count], 1, NY+10 ); // labels current file
160	marissa	1.1
161	marissa	1.2	glutSwapBuffers(); // double buffering set to animate smoothly
162	marissa	1.1	glFlush();
163			}
164			}
165
166	marissa	1.2	void bitmap( char str[], int x, int y ){ // called to display text onscreen
167	marissa	1.1	int i;
168
169	marissa	1.2	glRasterPos2f( x, y ); // set position of text
170			for( i=0; i<strlen( str ); i++) // display each character of str
171	marissa	1.1	glutBitmapCharacter( GLUT_BITMAP_HELVETICA_12, str[i] );
172			}
173
174	marissa	1.2	void key( unsigned char key, int x, int y ){ // called on key press
175	marissa	1.3	int i, tmp;
176	marissa	1.1
177			switch(key){
178	marissa	1.2	case 'q': exit(0); // quits on 'q'
179	marissa	1.1	break;
180	marissa	1.2	case 'r': count=0; // resets back to first time
181			ilev=1; // and first level
182	marissa	1.1	glutPostRedisplay();
183			break;
184	marissa	1.2	case 'a': anim=(anim+1)%2; // turns anim on/off
185	marissa	1.1	glutPostRedisplay();
186			break;
187			}
188			}
189
190	marissa	1.2	void TimerFunction( int value ){ // called when anim is set and arrow key is pressed
191	marissa	1.1	int i;
192
193	marissa	1.2	switch(value){ // increments in the correct direction
194	marissa	1.3	case DOWN : if( ilev<NZ )
195	marissa	1.2	ilev++; // if down arrow pressed, move down a level
196	marissa	1.1	break;
197			case UP : if( ilev>1 )
198	marissa	1.2	ilev--; // if up arrow is pressed, move up a level
199	marissa	1.1	break;
200			case LEFT : if( count>0 )
201	marissa	1.2	count--; // if left arrow is pressed, move back one time step
202	marissa	1.1	break;
203			case RIGHT: if( count<howmany-1 )
204	marissa	1.2	count++; // if right arrow is pressed, moves forward one time step
205	marissa	1.1	break;
206			}
207
208			glutPostRedisplay();
209
210			if (anim )
211			switch( value ){
212	marissa	1.3	case DOWN : if( ilev==NZ ) ilev=1; // if end reached, restart
213	marissa	1.1	glutTimerFunc( 100, TimerFunction, value ); // recalls itself
214			break;
215	marissa	1.3	case UP : if( ilev==1 ) ilev=NZ; // if end reached, restart
216	marissa	1.1	glutTimerFunc( 100, TimerFunction, value ); // recalls itself
217			break;
218	marissa	1.2	case LEFT : if( count==0 ) count=howmany-1; // if end reached, restart
219	marissa	1.1	glutTimerFunc( 100, TimerFunction, value ); // recalls itself
220			break;
221	marissa	1.2	case RIGHT: if( count==howmany-1 ) count=0; // if end reached, restart
222	marissa	1.1	glutTimerFunc( 100, TimerFunction, value ); // recalls itself
223			break;
224			}
225			}
226
227			void specialkey( int key, int x, int y ){
228			int i;
229
230	marissa	1.2	if( anim ) // if animation is set, call the timer function
231			glutTimerFunc( 100, TimerFunction, key); // to scroll automatically
232	marissa	1.1
233			switch(key){
234	marissa	1.3	case DOWN : if( ilev<NZ ) // if you haven't reached the bottom
235	marissa	1.2	ilev++; // keep going down
236	marissa	1.1	break;
237	marissa	1.2	case UP : if( ilev>1 ) // if you haven't reached the top
238			ilev--; // keep going up
239	marissa	1.1	break;
240			case RIGHT : if( count<howmany-1 ) // if you haven't reached the last file
241			count++; // keep going right
242			break;
243			case LEFT : if( count>0 ) // if you haven't reached the first file
244			count--; // keep going left
245			break;
246			}
247			glutPostRedisplay();
248			}
249
250	marissa	1.2	void global(){ // calculates the max/min for the total data set
251	marissa	1.1	FILE* fp;
252			int h, i, j;
253	marissa	1.3	for( h=0; h<sets; h++) // cycles through each window
254	marissa	1.2	for( i=0; i<howmany; i++ ) // cycles through each time
255	marissa	1.3	for( j=0; j<NZ; j++ ){ // cycles through each level for each file
256	marissa	1.2	local( h, i, j ); // calculates local max/min for specific data set
257	marissa	1.1	if( mxval > globalmx ) globalmx = mxval; // sets highest value to globalmx
258			if( mnval < globalmn ) globalmn = mnval; // sets lowest value to globalmn
259			}
260			}
261
262	marissa	1.2	void local( int i, int time, int lev ){ // calculates local max/min
263	marissa	1.1	int j;
264
265			mxval=0;
266			mnval=100;
267	marissa	1.2	readarray( data[i], fns[i][time], lev ); // read new array of data
268	marissa	1.1	for( j=0; j<NX*NY; j++ ){
269	marissa	1.2	if( data[i][j] > mxval )
270			mxval=data[i][j]; // set largest val to mxval
271	marissa	1.3	if( data[i][j] < mnval && data[i][j]!=0 )
272	marissa	1.2	mnval=data[i][j]; // set smallest positive val to mnval
273	marissa	1.1	}
274			}
275
276	marissa	1.2	void readnames( char filename[] ){ // reads in list of filenames
277	marissa	1.1	FILE* fp;
278			int i=0, j=0;
279
280	marissa	1.2	fp=fopen( filename, "r" ); // opens list of filenames
281			while( !feof(fp) ){ // reads until the end of the file
282			fscanf( fp, "%s", initfns[i] ); // places filename into an array of strings
283			i++; // counts how many filenames there are
284	marissa	1.1	}
285	marissa	1.2	fclose( fp ); // close file
286	marissa	1.3	sets=i-1; // saves number of initial filenames
287	marissa	1.1
288	marissa	1.3	for(i=0; i<sets; i++){ // goes through each read-in filename
289	marissa	1.2	fp=fopen( initfns[i], "r" ); // opens each filename
290	marissa	1.1	j=0;
291	marissa	1.2	while( !feof(fp) ){ // reads in filenames from each filename
292			fscanf( fp, "%s", fns[i][j]);
293	marissa	1.1	j++;
294			}
295	marissa	1.2	fclose(fp); // close file
296	marissa	1.1	}
297	marissa	1.2	howmany=j-1; // saves number of data filenames
298	marissa	1.1	}
299
300	marissa	1.2	void readjet(){ //reads in color scale values
301	marissa	1.1	FILE* fp;
302			int i, j;
303
304			fp=fopen( "jet.dat", "r" ); // opens file containing values
305	marissa	1.2	for( i=0; i<64; i++ ) // reads in 64 sets of r, g, b values
306	marissa	1.1	for( j=0; j<3; j++ )
307			fscanf( fp, "%f", &jet[i][j] );
308	marissa	1.2	fclose( fp ); // closes file
309	marissa	1.1	}
310
311			void readarray( float arr[], char filename[], int il ){ // reads new data
312	marissa	1.3	FILE* fp;
313	marissa	1.1	int i;
314
315	marissa	1.2	fp=fopen( filename, "r" ); // opens the file containing data
316			fseek( fp, (il-1)NXNY*4, SEEK_SET ); // seeks to the correct place using ilev
317	marissa	1.1	fread( arr, sizeof( arr[0] ), NX*NY, fp ); // reads in data to fill one level
318	marissa	1.2	fclose( fp ); // close file
319
320	marissa	1.3	if( nonegs )
321			for( i=0; i<NX*NY; i++ )
322			if( arr[i] < 0 )
323			arr[i] = pow(10, -20); // sets negative values to 10^-20
324
325			if( endian )
326			do_byteswap_f32( arr, NX*NY ); // switches endian
327	marissa	1.1	}
328
329	marissa	1.3	void do_byteswap_f32( float arr[], int nel ){ // switches endian
330
331			int i;
332			char src[4], trg[4];
333
334			for( i=0; i<nel; i++ ){
335			memcpy( src, &(arr[i]), 4 );
336			trg[0]=src[3];
337			trg[1]=src[2];
338			trg[2]=src[1];
339			trg[3]=src[0];
340			memcpy( &(arr[i]), trg, 4 );
341			}
342			}
343
344			void black(){
345			glClear( GL_COLOR_BUFFER_BIT );
346			glutSwapBuffers();
347			glFlush();
348	marissa	1.1	}
349
350			int main( int argc, char *argv[] ){
351	marissa	1.3	int i, setsx, setsy, tmpx, tmpy, winx, winy, parent;
352	marissa	1.1	char filename[MAX];
353
354	marissa	1.3	sscanf( argv[1], "%dx%d", &winx, &winy ); // reads screen resolution from command line
355	marissa	1.2	winy-=60; winx-=20; // adjusts resolution so edges won't get cut off
356	marissa	1.1
357			printf( "Please enter x, y and z dimensions.\n" );
358	marissa	1.3	scanf( "%d %d %d", &NX, &NY, &NZ ); // prompts user for NX, NY, NZ
359	marissa	1.1	printf( "Please enter filename.\n" );
360	marissa	1.2	scanf( "%s", filename ); // prompts user for initial filenames
361	marissa	1.1	printf( "Please enter dimensions of data sets.\n" );
362	marissa	1.3	scanf( "%dx%d", &setsx, &setsy ); // prompts user for dimensions of subwindows
363	marissa	1.1
364	marissa	1.2	readjet(); // stores color values
365			readnames( filename ); // gets list of filenames to read from
366			global(); // calculates max and min for all data
367
368			glutInit( &argc, argv );
369			glutInitDisplayMode( GLUT_RGB \| GLUT_DOUBLE ); // sets rgb mode and double buffering
370			glutInitWindowSize( winx, winy ); // parent window will cover screen
371			glutInitWindowPosition( 10, 10 ); // location of parent window
372			parent=glutCreateWindow( WINDOW ); // creates parent window
373	marissa	1.1
374	marissa	1.2	glClearColor( 0, 0, 0, 0 ); // sets clear color to black
375			gluOrtho2D( 0, winx , winy, 0 ); // sets(0,0) as top left corner
376	marissa	1.1	glutDisplayFunc( display );
377	marissa	1.2	glutKeyboardFunc( key ); // called on key press
378			glutSpecialFunc( specialkey ); // called on special key press (arrow keys)
379	marissa	1.3
380	marissa	1.1
381			for( i=0; i<setsx*setsy; i++ ){
382	marissa	1.2	tmpx = (i%setsx)*(winx/setsx); // x coordinate of top left corner of subwindow
383			tmpy = (i/setsx)*(winy/setsy); // y coordinate of top left corner of subwindow
384	marissa	1.1
385	marissa	1.2	win[i]=glutCreateSubWindow( parent, tmpx, tmpy, winx/setsx, winy/setsy ); // creates subwindow
386			gluOrtho2D( 0, NX+35, 0, NY+15 ); // sets how data is mapped to subwindow
387			glutKeyboardFunc( key ); // called on key press
388			glutSpecialFunc( specialkey ); // called on special key press (arrow keys)
389	marissa	1.3	if( i >= sets ) //
390			glutDisplayFunc( black );
391			else
392			glutDisplayFunc( display ); // sets display func for subwindow
393
394	marissa	1.2
395	marissa	1.3	glutCreateMenu( menu ); // adds a menu
396			glutAddMenuEntry( "Local Color Scale", 1 ); // adds a menu entry
397			glutAddMenuEntry( "Global Color Scale", 2 ); // adds a menu entry
398			glutAddMenuEntry( "User-Set Color Scale", 3 ); // adds a menu entry
399			glutAddMenuEntry( "Log Scale (on/off)", 4 ); // adds a menu entry
400			glutAddMenuEntry( "Allow Negatives (on/off)", 5 ); // adds a menu entry
401			glutAddMenuEntry( "Switch Endian (big/little) ", 6); // adds a menu entry
402			glutAttachMenu( GLUT_RIGHT_BUTTON ); // menu called on right click
403	marissa	1.1	}
404
405	marissa	1.2	glutMainLoop(); // begin processing events
406	marissa	1.1	return 0;
407			}
408