From: Diederick Niehorster <dcnieho@gmail.com>
Date: Mon, 30 Apr 2012 15:19:59 +0000 (+0000)
Subject: now using the Koch Snowflake (from fractals.dat) instead of Cantor dust
X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=commitdiff_plain;h=a1cb8b0e68d3bde25da1da00d6c13824128d70d7;p=freeglut

now using the Koch Snowflake (from fractals.dat) instead of Cantor dust
for fractals and fractals_random demo (changed built-in data).
Looks better
Also removed copying of fractals.dat to build dir from CMake file


git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@1272 7f0cb862-5218-0410-a997-914c9d46530a
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8b3c49b..c75e4fe 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -381,25 +381,6 @@ ADD_DEMO(spaceball       progs/demos/spaceball/spaceball.c
 ADD_DEMO(subwin          progs/demos/subwin/subwin.c)
 ADD_DEMO(timer           progs/demos/timer/timer.c)
 
-# finally, if any demos are built, copy needed files to output directory
-# (currently, thats just the input file for the Fractals demo)
-IF(FREEGLUT_BUILD_DEMOS)
-    # 1) copy fractals.dat from freeglut/progs/demos/Fractals
-    IF(BUILD_SHARED_LIBS)
-        SET(Frac_target Fractals)
-    ELSE()
-        SET(Frac_target Fractals_static)
-    ENDIF()
-    GET_TARGET_PROPERTY(DEMO_OUTPUT_DIRECTORY ${Frac_target} RUNTIME_OUTPUT_DIRECTORY)
-    ADD_CUSTOM_COMMAND(
-        TARGET ${Frac_target}
-        POST_BUILD
-        COMMAND ${CMAKE_COMMAND} -E copy
-        ${PROJECT_SOURCE_DIR}/progs/demos/Fractals/fractals.dat
-        ${DEMO_OUTPUT_DIRECTORY}/${CMAKE_CFG_INTDIR}
-    )
-ENDIF()
-
 # pkg-config support, to install at $(libdir)/pkgconfig
 # Define static build dependencies
 IF(WIN32)
diff --git a/progs/demos/Fractals/fractals.c b/progs/demos/Fractals/fractals.c
index 12d8989..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
 {
@@ -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++ )
diff --git a/progs/demos/Fractals_random/fractals_random.c b/progs/demos/Fractals_random/fractals_random.c
index 176013f..0cf6d0d 100644
--- a/progs/demos/Fractals_random/fractals_random.c
+++ b/progs/demos/Fractals_random/fractals_random.c
@@ -25,6 +25,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>
+#define FGH_PI       3.14159265358979323846
 #ifdef _MSC_VER
 /* DUMP MEMORY LEAKS */
 #include <crtdbg.h>
@@ -311,13 +312,20 @@ 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++ )