#include <stdlib.h>
#include <string.h>
#include <math.h>
+#define FGH_PI 3.14159265358979323846
typedef struct
{
AffineTrans ;
/* Number of levels to draw the fractal */
-static int num_levels = 0 ;
+static int num_levels = 4 ;
/* The definition of the fractal */
static int num_trans ;
static AffineTrans *affine ;
+/* Flag telling us to keep executing the main loop */
+static int continue_in_main_loop = 1;
+
/* the window title */
char window_title [ 80 ] ;
switch (key) {
case 27: /* Escape key */
- glutLeaveMainLoop () ;
+ continue_in_main_loop = 0 ;
break;
case '+' :
else /* No data file, set a default */
{
printf ( "ERROR opening file <%s>\n", fnme ) ;
- strcpy ( window_title, "Cantor Dust" ) ;
- num_trans = 2 ;
+ strcpy ( window_title, "Koch Snowflake" ) ;
+ num_trans = 4 ;
affine = (AffineTrans *)malloc ( num_trans * sizeof(AffineTrans) ) ;
- affine[0].a00 = 0.25 ; affine[0].a01 = 0.00 ; affine[0].a10 = 0.00 ; affine[0].a11 = 0.25 ;
+ affine[0].a00 = 1/3. ; affine[0].a01 = 0.00 ; affine[0].a10 = 0.00 ; affine[0].a11 = 1/3. ;
affine[0].b0 = 0.0 ; affine[0].b1 = 0.0 ;
- affine[1].a00 = 0.25 ; affine[1].a01 = 0.00 ; affine[1].a10 = 0.00 ; affine[1].a11 = 0.25 ;
- affine[1].b0 = 0.5 ; affine[1].b1 = 0.0 ;
+
+ affine[1].a00 = 1/6. ; affine[1].a01 = -1/3.*sin(FGH_PI/3.) ; affine[1].a10 = 1/3.*sin(FGH_PI/3.) ; affine[1].a11 = 1/6. ;
+ affine[1].b0 = 1/3. ; affine[1].b1 = 0.0 ;
+
+ affine[2].a00 = 1/6. ; affine[2].a01 = -1/3.*sin(-FGH_PI/3.) ; affine[2].a10 = 1/3.*sin(-FGH_PI/3.) ; affine[2].a11 = 1/6. ;
+ affine[2].b0 = 0.5 ; affine[2].b1 = sqrt(3)/6. ;
+
+ affine[3].a00 = 1/3. ; affine[3].a01 = 0.00 ; affine[3].a10 = 0.00 ; affine[3].a11 = 1/3. ;
+ affine[3].b0 = 2/3. ; affine[3].b1 = 0.0 ;
}
for ( i = 0; i < num_trans; i++ )
int
main(int argc, char *argv[])
{
- int fractal_window ;
-
glutInitWindowSize(500, 250);
glutInitWindowPosition ( 140, 140 );
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE );
else
readConfigFile ( "fractals.dat" ) ;
- fractal_window = glutCreateWindow( window_title );
+ glutCreateWindow( window_title );
glClearColor(1.0, 1.0, 1.0, 1.0);
glutSpecialFunc(Special);
glutDisplayFunc(Display);
- glutMainLoop();
+#ifdef WIN32
+#endif
+
+ while ( continue_in_main_loop )
+ glutMainLoopEvent();
printf ( "Back from the 'freeglut' main loop\n" ) ;