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From http://www.jwz.org/xscreensaver/xscreensaver-5.37.tar.gz
[xscreensaver] / hacks / glx / projectiveplane.c
diff --git a/hacks/glx/projectiveplane.c b/hacks/glx/projectiveplane.c
index 551835cac8ff0dc755737655c877447ef517b8e5..0fe29fa32a0fb9fad17976fb55b8787d497d4681 100644 (file)
--- a/hacks/glx/projectiveplane.c
+++ b/hacks/glx/projectiveplane.c
@@ -22,6 +22,7 @@ static const char sccsid[] = "@(#)projectiveplane.c  1.1 14/01/01 xlockmore";
  *
  * REVISION HISTORY:
  * C. Steger - 14/01/03: Initial version
+ * C. Steger - 14/10/03: Moved the curlicue texture to curlicue.h
  */
 
 /*
@@ -163,6 +164,8 @@ static const char sccsid[] = "@(#)projectiveplane.c  1.1 14/01/01 xlockmore";
  * Dimensions", Scientific American Library, 1990.
  */
 
+#include "curlicue.h"
+
 #ifndef M_PI
 #define M_PI 3.14159265358979323846
 #endif
@@ -217,6 +220,7 @@ static const char sccsid[] = "@(#)projectiveplane.c  1.1 14/01/01 xlockmore";
                             "*showFPS:    False \n" \
 
 # define refresh_projectiveplane 0
+# define release_projectiveplane 0
 # include "xlockmore.h"         /* from the xscreensaver distribution */
 #else  /* !STANDALONE */
 # include "xlock.h"             /* from the xlockmore distribution */
@@ -224,7 +228,7 @@ static const char sccsid[] = "@(#)projectiveplane.c  1.1 14/01/01 xlockmore";
 
 #ifdef USE_GL
 
-#ifndef HAVE_COCOA
+#ifndef HAVE_JWXYZ
 # include <X11/keysym.h>
 #endif
 
@@ -236,7 +240,7 @@ static const char sccsid[] = "@(#)projectiveplane.c  1.1 14/01/01 xlockmore";
 #ifdef USE_MODULES
 ModStruct projectiveplane_description =
 {"projectiveplane", "init_projectiveplane", "draw_projectiveplane",
- "release_projectiveplane", "draw_projectiveplane", "change_projectiveplane",
+ NULL, "draw_projectiveplane", "change_projectiveplane",
  NULL, &projectiveplane_opts, 25000, 1, 1, 1, 1.0, 4, "",
  "Rotate a 4d embedding of the real projective plane in 4d or walk on it",
  0, NULL};
@@ -245,18 +249,12 @@ ModStruct projectiveplane_description =
 
 
 static char *mode;
-static int display_mode;
 static char *appear;
-static int appearance;
 static char *color_mode;
-static int colors;
 static char *view_mode;
-static int view;
 static Bool marks;
 static char *proj_3d;
-static int projection_3d;
 static char *proj_4d;
-static int projection_4d;
 static float speed_wx;
 static float speed_wy;
 static float speed_wz;
@@ -341,6 +339,14 @@ ENTRYPOINT ModeSpecOpt projectiveplane_opts =
 typedef struct {
   GLint      WindH, WindW;
   GLXContext *glx_context;
+  /* Options */
+  int display_mode;
+  int appearance;
+  int colors;
+  int view;
+  Bool marks;
+  int projection_3d;
+  int projection_4d;
   /* 4D rotation angles */
   float alpha, beta, delta, zeta, eta, theta;
   /* Movement parameters */
@@ -375,268 +381,6 @@ typedef struct {
 static projectiveplanestruct *projectiveplane = (projectiveplanestruct *) NULL;
 
 
-/* A texture map containing a "curlicue" */
-#define TEX_DIMENSION 64
-static const unsigned char texture[TEX_DIMENSION*TEX_DIMENSION] = {
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 58, 43, 43, 43, 43, 45, 70, 70, 70,
-   70, 70, 70, 70, 74, 98, 98, 98,100,194,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 18,  0,  0,  0,  0,  0,  0,  0,  0,
-    0,  0,  0,  0,  0,  0,  0, 30,186,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 18,  0,  0,  0,  0,  0,  0,  0,  0,
-    0,  0,  0,  0,  0,  1,111,244,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 18,  0,  0,  0,  0,  0,  0,  0,  0,
-    0,  0,  0,  0, 43,198,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 18,  0,  0,  0,  0,  0,  0,  0,  0,
-    0,  0,  5,123,248,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 18,  0,  0,  0,  0,  0,  0,  0,  0,
-    0, 50,209,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,246,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 18,  0,  0,  0,  0,  0,  0,  0,  0,
-   74,252,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,138,  4,
-   66,229,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 18,  0,  0,  0,  0,  0,  0,  0,  0,
-    1,170,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,153,  0,  0,
-    0, 53,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 18,  0,  0,  0,  0,  0,  0,  0,  0,
-    0,  6,188,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,213,  7,  0,  0,
-    0,  0,226,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 45,  0,  0,  0,  0,  0, 47,  0,  0,
-    0,  0, 22,225,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,254, 54,  0,  0,  0,
-    0, 81,254,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 45,  0,  0,  0,  0, 56,247, 82,  0,
-    0,  0,  0, 59,253,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,152,  0,  0,  0,  0,
-   52,243,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 45,  0,  0,  0,  8,215,255,250, 56,
-    0,  0,  0,  0,142,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,241, 19,  0,  0,  0, 15,
-  220,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 45,  0,  0,  0,129,255,255,255,230,
-   23,  0,  0,  0, 12,230,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,131,  0,  0,  0,  0,157,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 45,  0,  0, 49,250,255,255,255,255,
-  171,  0,  0,  0,  0,112,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,246, 19,  0,  0,  0, 54,253,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 45,  0,  5,208,255,255,255,255,255,
-  255, 77,  0,  0,  0,  9,231,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,163,  0,  0,  0,  0,186,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 45,  0,121,255,255,255,255,255,255,
-  255,211,  2,  0,  0,  0,134,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255, 69,  0,  0,  0, 50,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 45, 41,247,255,255,255,255,255,255,
-  255,255, 73,  0,  0,  0, 38,254,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,237,  4,  0,  0,  0,145,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255, 52,201,255,255,255,255,255,255,255,
-  255,255,169,  0,  0,  0,  0,216,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,181,  0,  0,  0,  0,229,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,186,255,255,255,255,255,255,255,255,
-  255,255,247,  7,  0,  0,  0,150,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,130,  0,  0,  0, 42,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255, 67,  0,  0,  0, 91,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255, 79,  0,  0,  0, 95,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,120,  0,  0,  0, 56,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255, 55,  0,  0,  0,130,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,157,  0,  0,  0, 21,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255, 34,  0,  0,  0,161,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,179,  0,  0,  0,  2,250,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255, 27,  0,  0,  0,168,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,200,  0,  0,  0,  0,249,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255, 27,  0,  0,  0,168,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,200,  0,  0,  0,  0,249,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255, 27,  0,  0,  0,163,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
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-  255,255,255,255,255,255,255,255,114,  0,  0,  0, 53,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255, 78,  0,  0,  0, 84,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,165,  0,  0,  0,  3,241,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,252, 16,  0,  0,  0,139,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,228,  0,  0,  0,  0,161,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,192,  0,  0,  0,  0,198,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255, 46,  0,  0,  0, 67,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255, 93,  0,  0,  0, 21,250,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,139,  0,  0,  0,  1,211,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,226,  7,  0,  0,  0,108,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,230,  6,  0,  0,  0, 79,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,106,  0,  0,  0,  1,206,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255, 97,  0,  0,  0,  0,183,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  202,  3,  0,  0,  0, 67,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,221,  8,  0,  0,  0, 27,
-  235,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,243,
-   40,  0,  0,  0,  0,198,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,126,  0,  0,  0,  0,
-   71,252,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,253, 85,
-    0,  0,  0,  0, 96,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,247, 44,  0,  0,  0,
-    0, 91,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,116,  0,
-    0,  0,  0, 25,233,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,216, 11,  0,  0,
-    0,  0, 90,251,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,252,112,  0,  0,
-    0,  0,  4,191,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,174,  4,  0,
-    0,  0,  0, 72,235,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,242, 84,  0,  0,  0,
-    0,  0,146,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,150,  1,
-    0,  0,  0,  0, 27,181,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,194, 39,  0,  0,  0,  0,
-    0,120,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,151,
-    4,  0,  0,  0,  0,  0, 77,209,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,216, 92,  1,  0,  0,  0,  0,  0,
-  125,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  175, 12,  0,  0,  0,  0,  0,  1, 70,164,241,255,255,255,255,255,
-  255,255,255,255,255,242,171, 77,  2,  0,  0,  0,  0,  0,  4,150,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,214, 41,  0,  0,  0,  0,  0,  0,  0,  4, 48, 98,138,163,163,
-  163,163,140,103, 55,  5,  0,  0,  0,  0,  0,  0,  0, 30,199,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,245,125,  8,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
-    0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  3,105,240,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,222,100,  5,  0,  0,  0,  0,  0,  0,  0,  0,  0,
-    0,  0,  0,  0,  0,  0,  0,  0,  0,  2, 83,210,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,228,136, 45,  0,  0,  0,  0,  0,  0,  0,
-    0,  0,  0,  0,  0,  0,  0, 37,125,220,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,225,166,112, 74, 43, 32, 12,
-    8, 32, 40, 71,105,162,218,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-  255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-};
-
-
 /* Add a rotation around the wx-plane to the matrix m. */
 static void rotatewx(float m[4][4], float phi)
 {
@@ -831,12 +575,12 @@ static void quats_to_rotmat(float p[4], float q[4], float m[4][4])
 
 
 /* Compute a fully saturated and bright color based on an angle. */
-static void color(double angle, float col[4])
+static void color(projectiveplanestruct *pp, double angle, float col[4])
 {
   int s;
   double t;
 
-  if (colors == COLORS_TWOSIDED)
+  if (pp->colors == COLORS_TWOSIDED)
     return;
 
   if (angle >= 0.0)
@@ -880,7 +624,7 @@ static void color(double angle, float col[4])
       col[2] = 1.0-t;
       break;
   }
-  if (display_mode == DISP_TRANSPARENT)
+  if (pp->display_mode == DISP_TRANSPARENT)
     col[3] = 0.7;
   else
     col[3] = 1.0;
@@ -903,7 +647,7 @@ static void setup_projective_plane(ModeInfo *mi, double umin, double umax,
     for (j=0; j<=NUMU; j++)
     {
       k = i*(NUMU+1)+j;
-      if (appearance != APPEARANCE_DIRECTION_BANDS)
+      if (pp->appearance != APPEARANCE_DIRECTION_BANDS)
         u = -ur*j/NUMU+umin;
       else
         u = ur*j/NUMU+umin;
@@ -915,14 +659,14 @@ static void setup_projective_plane(ModeInfo *mi, double umin, double umax,
       sv2 = sin(0.5*v);
       cv4 = cos(0.25*v);
       sv4 = sin(0.25*v);
-      if (colors == COLORS_DEPTH)
-        color(((su*su*sv4*sv4-cv4*cv4)+1.0)*M_PI*2.0/3.0,pp->col[k]);
-      else if (colors == COLORS_DIRECTION)
-        color(2.0*M_PI+fmod(2.0*u,2.0*M_PI),pp->col[k]);
-      else /* colors == COLORS_DISTANCE */
-        color(v*(5.0/6.0),pp->col[k]);
+      if (pp->colors == COLORS_DEPTH)
+        color(pp,((su*su*sv4*sv4-cv4*cv4)+1.0)*M_PI*2.0/3.0,pp->col[k]);
+      else if (pp->colors == COLORS_DIRECTION)
+        color(pp,2.0*M_PI+fmod(2.0*u,2.0*M_PI),pp->col[k]);
+      else /* pp->colors == COLORS_DISTANCE */
+        color(pp,v*(5.0/6.0),pp->col[k]);
       pp->tex[k][0] = -32*u/(2.0*M_PI);
-      if (appearance != APPEARANCE_DISTANCE_BANDS)
+      if (pp->appearance != APPEARANCE_DISTANCE_BANDS)
         pp->tex[k][1] = 32*v/(2.0*M_PI);
       else
         pp->tex[k][1] = 32*v/(2.0*M_PI)-0.5;
@@ -967,7 +711,7 @@ static int projective_plane(ModeInfo *mi, double umin, double umax,
   float q1[4], q2[4], r1[4][4], r2[4][4];
   projectiveplanestruct *pp = &projectiveplane[MI_SCREEN(mi)];
 
-  if (view == VIEW_WALK || view == VIEW_WALKTURN)
+  if (pp->view == VIEW_WALK || pp->view == VIEW_WALKTURN)
   {
     /* Compute the rotation that rotates the projective plane in 4D without
        the trackball rotations. */
@@ -1009,7 +753,7 @@ static int projective_plane(ModeInfo *mi, double umin, double umax,
       yv[l] = (mat[l][0]*xxv[0]+mat[l][1]*xxv[1]+
                mat[l][2]*xxv[2]+mat[l][3]*xxv[3]);
     }
-    if (projection_4d == DISP_4D_ORTHOGRAPHIC)
+    if (pp->projection_4d == DISP_4D_ORTHOGRAPHIC)
     {
       for (l=0; l<3; l++)
       {
@@ -1084,7 +828,7 @@ static int projective_plane(ModeInfo *mi, double umin, double umax,
         r += mat[l][m]*xx[m];
       y[l] = r;
     }
-    if (projection_4d == DISP_4D_ORTHOGRAPHIC)
+    if (pp->projection_4d == DISP_4D_ORTHOGRAPHIC)
     {
       for (l=0; l<3; l++)
         p[l] = y[l]+pp->offset4d[l];
@@ -1128,7 +872,7 @@ static int projective_plane(ModeInfo *mi, double umin, double umax,
         yv[l] = (mat[l][0]*pp->xv[o][0]+mat[l][1]*pp->xv[o][1]+
                  mat[l][2]*pp->xv[o][2]+mat[l][3]*pp->xv[o][3]);
       }
-      if (projection_4d == DISP_4D_ORTHOGRAPHIC)
+      if (pp->projection_4d == DISP_4D_ORTHOGRAPHIC)
       {
         for (l=0; l<3; l++)
         {
@@ -1161,10 +905,10 @@ static int projective_plane(ModeInfo *mi, double umin, double umax,
     }
   }
 
-  if (colors == COLORS_TWOSIDED)
+  if (pp->colors == COLORS_TWOSIDED)
   {
     glColor3fv(mat_diff_red);
-    if (display_mode == DISP_TRANSPARENT)
+    if (pp->display_mode == DISP_TRANSPARENT)
     {
       glMaterialfv(GL_FRONT,GL_AMBIENT_AND_DIFFUSE,mat_diff_trans_red);
       glMaterialfv(GL_BACK,GL_AMBIENT_AND_DIFFUSE,mat_diff_trans_green);
@@ -1177,14 +921,14 @@ static int projective_plane(ModeInfo *mi, double umin, double umax,
   }
   glBindTexture(GL_TEXTURE_2D,pp->tex_name);
 
-  if (appearance != APPEARANCE_DIRECTION_BANDS)
+  if (pp->appearance != APPEARANCE_DIRECTION_BANDS)
   {
     for (i=0; i<NUMV; i++)
     {
-      if (appearance == APPEARANCE_DISTANCE_BANDS &&
+      if (pp->appearance == APPEARANCE_DISTANCE_BANDS &&
           ((i & (NUMB-1)) >= NUMB/4) && ((i & (NUMB-1)) < 3*NUMB/4))
         continue;
-      if (display_mode == DISP_WIREFRAME)
+      if (pp->display_mode == DISP_WIREFRAME)
         glBegin(GL_QUAD_STRIP);
       else
         glBegin(GL_TRIANGLE_STRIP);
@@ -1197,7 +941,7 @@ static int projective_plane(ModeInfo *mi, double umin, double umax,
           o = l*(NUMU+1)+m;
           glNormal3fv(pp->pn[o]);
           glTexCoord2fv(pp->tex[o]);
-          if (colors != COLORS_TWOSIDED)
+          if (pp->colors != COLORS_TWOSIDED)
           {
             glColor3fv(pp->col[o]);
             glMaterialfv(GL_FRONT_AND_BACK,GL_AMBIENT_AND_DIFFUSE,pp->col[o]);
@@ -1209,13 +953,13 @@ static int projective_plane(ModeInfo *mi, double umin, double umax,
       glEnd();
     }
   }
-  else /* appearance == APPEARANCE_DIRECTION_BANDS */
+  else /* pp->appearance == APPEARANCE_DIRECTION_BANDS */
   {
     for (j=0; j<NUMU; j++)
     {
       if ((j & (NUMB-1)) >= NUMB/2)
         continue;
-      if (display_mode == DISP_WIREFRAME)
+      if (pp->display_mode == DISP_WIREFRAME)
         glBegin(GL_QUAD_STRIP);
       else
         glBegin(GL_TRIANGLE_STRIP);
@@ -1228,7 +972,7 @@ static int projective_plane(ModeInfo *mi, double umin, double umax,
           o = l*(NUMU+1)+m;
           glNormal3fv(pp->pn[o]);
           glTexCoord2fv(pp->tex[o]);
-          if (colors != COLORS_TWOSIDED)
+          if (pp->colors != COLORS_TWOSIDED)
           {
             glColor3fv(pp->col[o]);
             glMaterialfv(GL_FRONT_AND_BACK,GL_AMBIENT_AND_DIFFUSE,pp->col[o]);
@@ -1276,7 +1020,7 @@ static void init(ModeInfo *mi)
   if (walk_speed == 0.0)
     walk_speed = 20.0;
 
-  if (view == VIEW_TURN)
+  if (pp->view == VIEW_TURN)
   {
     pp->alpha = frand(360.0);
     pp->beta = frand(360.0);
@@ -1316,17 +1060,17 @@ static void init(ModeInfo *mi)
   gen_texture(mi);
   setup_projective_plane(mi,0.0,2.0*M_PI,0.0,2.0*M_PI);
 
-  if (marks)
+  if (pp->marks)
     glEnable(GL_TEXTURE_2D);
   else
     glDisable(GL_TEXTURE_2D);
 
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
-  if (projection_3d == DISP_3D_PERSPECTIVE ||
-      view == VIEW_WALK || view == VIEW_WALKTURN)
+  if (pp->projection_3d == DISP_3D_PERSPECTIVE ||
+      pp->view == VIEW_WALK || pp->view == VIEW_WALKTURN)
   {
-    if (view == VIEW_WALK || view == VIEW_WALKTURN)
+    if (pp->view == VIEW_WALK || pp->view == VIEW_WALKTURN)
       gluPerspective(60.0,1.0,0.01,10.0);
     else
       gluPerspective(60.0,1.0,0.1,10.0);
@@ -1339,11 +1083,11 @@ static void init(ModeInfo *mi)
   glLoadIdentity();
 
 # ifdef HAVE_JWZGLES /* #### glPolygonMode other than GL_FILL unimplemented */
-  if (display_mode == DISP_WIREFRAME)
-    display_mode = DISP_SURFACE;
+  if (pp->display_mode == DISP_WIREFRAME)
+    pp->display_mode = DISP_SURFACE;
 # endif
 
-  if (display_mode == DISP_SURFACE)
+  if (pp->display_mode == DISP_SURFACE)
   {
     glEnable(GL_DEPTH_TEST);
     glDepthFunc(GL_LESS);
@@ -1361,7 +1105,7 @@ static void init(ModeInfo *mi)
     glDepthMask(GL_TRUE);
     glDisable(GL_BLEND);
   }
-  else if (display_mode == DISP_TRANSPARENT)
+  else if (pp->display_mode == DISP_TRANSPARENT)
   {
     glDisable(GL_DEPTH_TEST);
     glShadeModel(GL_SMOOTH);
@@ -1379,7 +1123,7 @@ static void init(ModeInfo *mi)
     glEnable(GL_BLEND);
     glBlendFunc(GL_SRC_ALPHA,GL_ONE);
   }
-  else  /* display_mode == DISP_WIREFRAME */
+  else  /* pp->display_mode == DISP_WIREFRAME */
   {
     glDisable(GL_DEPTH_TEST);
     glShadeModel(GL_FLAT);
@@ -1398,7 +1142,7 @@ static void display_projectiveplane(ModeInfo *mi)
 
   if (!pp->button_pressed)
   {
-    if (view == VIEW_TURN)
+    if (pp->view == VIEW_TURN)
     {
       pp->alpha += speed_wx * pp->speed_scale;
       if (pp->alpha >= 360.0)
@@ -1419,7 +1163,7 @@ static void display_projectiveplane(ModeInfo *mi)
       if (pp->theta >= 360.0)
         pp->theta -= 360.0;
     }
-    if (view == VIEW_WALKTURN)
+    if (pp->view == VIEW_WALKTURN)
     {
       pp->zeta += speed_xy * pp->speed_scale;
       if (pp->zeta >= 360.0)
@@ -1431,7 +1175,7 @@ static void display_projectiveplane(ModeInfo *mi)
       if (pp->theta >= 360.0)
         pp->theta -= 360.0;
     }
-    if (view == VIEW_WALK || view == VIEW_WALKTURN)
+    if (pp->view == VIEW_WALK || pp->view == VIEW_WALKTURN)
     {
       pp->dvmove = (pp->dir*sin(walk_direction*M_PI/180.0)*
                     walk_speed*M_PI/4096.0);
@@ -1466,10 +1210,10 @@ static void display_projectiveplane(ModeInfo *mi)
 
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
-  if (projection_3d == DISP_3D_PERSPECTIVE ||
-      view == VIEW_WALK || view == VIEW_WALKTURN)
+  if (pp->projection_3d == DISP_3D_PERSPECTIVE ||
+      pp->view == VIEW_WALK || pp->view == VIEW_WALKTURN)
   {
-    if (view == VIEW_WALK || view == VIEW_WALKTURN)
+    if (pp->view == VIEW_WALK || pp->view == VIEW_WALKTURN)
       gluPerspective(60.0,pp->aspect,0.01,10.0);
     else
       gluPerspective(60.0,pp->aspect,0.1,10.0);
@@ -1577,164 +1321,158 @@ ENTRYPOINT void init_projectiveplane(ModeInfo *mi)
 {
   projectiveplanestruct *pp;
 
-  if (projectiveplane == NULL)
-  {
-    projectiveplane =
-      (projectiveplanestruct *)calloc(MI_NUM_SCREENS(mi),
-                                      sizeof(projectiveplanestruct));
-    if (projectiveplane == NULL)
-      return;
-  }
+  MI_INIT(mi, projectiveplane, NULL);
   pp = &projectiveplane[MI_SCREEN(mi)];
 
   
-  pp->trackballs[0] = gltrackball_init();
-  pp->trackballs[1] = gltrackball_init();
+  pp->trackballs[0] = gltrackball_init(True);
+  pp->trackballs[1] = gltrackball_init(True);
   pp->current_trackball = 0;
   pp->button_pressed = False;
 
   /* Set the display mode. */
   if (!strcasecmp(mode,"random"))
   {
-    display_mode = random() % NUM_DISPLAY_MODES;
+    pp->display_mode = random() % NUM_DISPLAY_MODES;
   }
   else if (!strcasecmp(mode,"wireframe"))
   {
-    display_mode = DISP_WIREFRAME;
+    pp->display_mode = DISP_WIREFRAME;
   }
   else if (!strcasecmp(mode,"surface"))
   {
-    display_mode = DISP_SURFACE;
+    pp->display_mode = DISP_SURFACE;
   }
   else if (!strcasecmp(mode,"transparent"))
   {
-    display_mode = DISP_TRANSPARENT;
+    pp->display_mode = DISP_TRANSPARENT;
   }
   else
   {
-    display_mode = random() % NUM_DISPLAY_MODES;
+    pp->display_mode = random() % NUM_DISPLAY_MODES;
   }
 
   /* Orientation marks don't make sense in wireframe mode. */
-  if (display_mode == DISP_WIREFRAME)
-    marks = False;
+  pp->marks = marks;
+  if (pp->display_mode == DISP_WIREFRAME)
+    pp->marks = False;
 
   /* Set the appearance. */
   if (!strcasecmp(appear,"random"))
   {
-    appearance = random() % NUM_APPEARANCES;
+    pp->appearance = random() % NUM_APPEARANCES;
   }
   else if (!strcasecmp(appear,"solid"))
   {
-    appearance = APPEARANCE_SOLID;
+    pp->appearance = APPEARANCE_SOLID;
   }
   else if (!strcasecmp(appear,"distance-bands"))
   {
-    appearance = APPEARANCE_DISTANCE_BANDS;
+    pp->appearance = APPEARANCE_DISTANCE_BANDS;
   }
   else if (!strcasecmp(appear,"direction-bands"))
   {
-    appearance = APPEARANCE_DIRECTION_BANDS;
+    pp->appearance = APPEARANCE_DIRECTION_BANDS;
   }
   else
   {
-    appearance = random() % NUM_APPEARANCES;
+    pp->appearance = random() % NUM_APPEARANCES;
   }
 
   /* Set the color mode. */
   if (!strcasecmp(color_mode,"random"))
   {
-    colors = random() % NUM_COLORS;
+    pp->colors = random() % NUM_COLORS;
   }
   else if (!strcasecmp(color_mode,"two-sided"))
   {
-    colors = COLORS_TWOSIDED;
+    pp->colors = COLORS_TWOSIDED;
   }
   else if (!strcasecmp(color_mode,"distance"))
   {
-    colors = COLORS_DISTANCE;
+    pp->colors = COLORS_DISTANCE;
   }
   else if (!strcasecmp(color_mode,"direction"))
   {
-    colors = COLORS_DIRECTION;
+    pp->colors = COLORS_DIRECTION;
   }
   else if (!strcasecmp(color_mode,"depth"))
   {
-    colors = COLORS_DEPTH;
+    pp->colors = COLORS_DEPTH;
   }
   else
   {
-    colors = random() % NUM_COLORS;
+    pp->colors = random() % NUM_COLORS;
   }
 
   /* Set the view mode. */
   if (!strcasecmp(view_mode,"random"))
   {
-    view = random() % NUM_VIEW_MODES;
+    pp->view = random() % NUM_VIEW_MODES;
   }
   else if (!strcasecmp(view_mode,"walk"))
   {
-    view = VIEW_WALK;
+    pp->view = VIEW_WALK;
   }
   else if (!strcasecmp(view_mode,"turn"))
   {
-    view = VIEW_TURN;
+    pp->view = VIEW_TURN;
   }
   else if (!strcasecmp(view_mode,"walk-turn"))
   {
-    view = VIEW_WALKTURN;
+    pp->view = VIEW_WALKTURN;
   }
   else
   {
-    view = random() % NUM_VIEW_MODES;
+    pp->view = random() % NUM_VIEW_MODES;
   }
 
   /* Set the 3d projection mode. */
   if (!strcasecmp(proj_3d,"random"))
   {
     /* Orthographic projection only makes sense in turn mode. */
-    if (view == VIEW_TURN)
-      projection_3d = random() % NUM_DISP_3D_MODES;
+    if (pp->view == VIEW_TURN)
+      pp->projection_3d = random() % NUM_DISP_3D_MODES;
     else
-      projection_3d = DISP_3D_PERSPECTIVE;
+      pp->projection_3d = DISP_3D_PERSPECTIVE;
   }
   else if (!strcasecmp(proj_3d,"perspective"))
   {
-    projection_3d = DISP_3D_PERSPECTIVE;
+    pp->projection_3d = DISP_3D_PERSPECTIVE;
   }
   else if (!strcasecmp(proj_3d,"orthographic"))
   {
-    projection_3d = DISP_3D_ORTHOGRAPHIC;
+    pp->projection_3d = DISP_3D_ORTHOGRAPHIC;
   }
   else
   {
     /* Orthographic projection only makes sense in turn mode. */
-    if (view == VIEW_TURN)
-      projection_3d = random() % NUM_DISP_3D_MODES;
+    if (pp->view == VIEW_TURN)
+      pp->projection_3d = random() % NUM_DISP_3D_MODES;
     else
-      projection_3d = DISP_3D_PERSPECTIVE;
+      pp->projection_3d = DISP_3D_PERSPECTIVE;
   }
 
   /* Set the 4d projection mode. */
   if (!strcasecmp(proj_4d,"random"))
   {
-    projection_4d = random() % NUM_DISP_4D_MODES;
+    pp->projection_4d = random() % NUM_DISP_4D_MODES;
   }
   else if (!strcasecmp(proj_4d,"perspective"))
   {
-    projection_4d = DISP_4D_PERSPECTIVE;
+    pp->projection_4d = DISP_4D_PERSPECTIVE;
   }
   else if (!strcasecmp(proj_4d,"orthographic"))
   {
-    projection_4d = DISP_4D_ORTHOGRAPHIC;
+    pp->projection_4d = DISP_4D_ORTHOGRAPHIC;
   }
   else
   {
-    projection_4d = random() % NUM_DISP_4D_MODES;
+    pp->projection_4d = random() % NUM_DISP_4D_MODES;
   }
 
   /* Modify the speeds to a useful range in walk-and-turn mode. */
-  if (view == VIEW_WALKTURN)
+  if (pp->view == VIEW_WALKTURN)
   {
     speed_wx *= 0.2;
     speed_wy *= 0.2;
@@ -1794,33 +1532,6 @@ ENTRYPOINT void draw_projectiveplane(ModeInfo *mi)
 }
 
 
-/*
- *-----------------------------------------------------------------------------
- *    The display is being taken away from us.  Free up malloc'ed 
- *      memory and X resources that we've alloc'ed.  Only called
- *      once, we must zap everything for every screen.
- *-----------------------------------------------------------------------------
- */
-
-ENTRYPOINT void release_projectiveplane(ModeInfo *mi)
-{
-  if (projectiveplane != NULL)
-  {
-    int screen;
-
-    for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++)
-    {
-      projectiveplanestruct *pp = &projectiveplane[screen];
-
-      if (pp->glx_context)
-        pp->glx_context = (GLXContext *)NULL;
-    }
-    (void) free((void *)projectiveplane);
-    projectiveplane = (projectiveplanestruct *)NULL;
-  }
-  FreeAllGL(mi);
-}
-
 #ifndef STANDALONE
 ENTRYPOINT void change_projectiveplane(ModeInfo *mi)
 {
Archive of old xscreensaver versions (http://www.jwz.org/xscreensaver/)