X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=progs%2Fdemos%2FFractals%2Ffractals.c;h=ec49552d2d0ab4d5782f7ac2ebef31e71c34dbd1;hb=8792e03c07aeeb47a4b0c76864a6658d625a3557;hp=1aef1c4107e9c86307ac06b50c81e12255782dff;hpb=3a62f01ded704b52999ca8b22f9cd7b6abb251f5;p=freeglut

diff --git a/progs/demos/Fractals/fractals.c b/progs/demos/Fractals/fractals.c
index 1aef1c4..ec49552 100644
--- a/progs/demos/Fractals/fractals.c
+++ b/progs/demos/Fractals/fractals.c
@@ -23,6 +23,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>
+#define FGH_PI       3.14159265358979323846
 
 typedef struct
 {
@@ -33,7 +34,7 @@ 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 ;
@@ -267,13 +268,20 @@ void readConfigFile ( char *fnme )
   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++ )