http://www.tienza.es/crux/src/www.jwz.org/xscreensaver/xscreensaver-5.06.tar.gz

[xscreensaver] / hacks / glx / sphere.c

diff --git a/hacks/glx/sphere.c b/hacks/glx/sphere.c
index 5aba74f0ddffbdf2c46dbe072f9ba2d84191d819..10e86d7698e1fd6b81229034067a9f5ae39deb73 100644 (file)
--- a/hacks/glx/sphere.c
+++ b/hacks/glx/sphere.c
@@ -1,4 +1,4 @@
-/* sphere, Copyright (c) 2002 Paul Bourke <pbourke@swin.edu.au>
+/* sphere, Copyright (c) 2002, 2008 Paul Bourke <pbourke@swin.edu.au>
  * Utility function to create a unit sphere in GL.
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
@@ -15,21 +15,31 @@
  *                         http://astronomy.swin.edu.au/~pbourke/opengl/sphere/
  */
 
-#include "config.h"
-#include <stdlib.h>
 #include <math.h>
-#include <GL/glx.h>
+#include <stdlib.h>
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#ifdef HAVE_COCOA
+# include <OpenGL/gl.h>
+#else
+# include <GL/gl.h>
+#endif
 
+#include "sphere.h"
 
 typedef struct { GLfloat x, y, z; } XYZ;
 
-void
-unit_sphere (int stacks, int slices, Bool wire)
+int
+unit_sphere (int stacks, int slices, int wire_p)
 {
+  int polys = 0;
   int i,j;
   double theta1, theta2, theta3;
   XYZ e, p;
-  XYZ la, lb;
+  XYZ la = { 0, 0, 0 }, lb = { 0, 0, 0 };
   XYZ c = {0, 0, 0};  /* center */
   double r = 1.0;     /* radius */
   int stacks2 = stacks * 2;
@@ -44,7 +54,7 @@ unit_sphere (int stacks, int slices, Bool wire)
       glBegin (GL_POINTS);
       glVertex3f (c.x, c.y, c.z);
       glEnd();
-      return;
+      return 1;
     }
 
   glFrontFace(GL_CW);
@@ -54,12 +64,12 @@ unit_sphere (int stacks, int slices, Bool wire)
       theta1 = j       * (M_PI+M_PI) / stacks2 - M_PI_2;
       theta2 = (j + 1) * (M_PI+M_PI) / stacks2 - M_PI_2;
 
-      glBegin (wire ? GL_LINE_LOOP : GL_TRIANGLE_STRIP);
+      glBegin (wire_p ? GL_LINE_LOOP : GL_TRIANGLE_STRIP);
       for (i = 0; i <= slices; i++)
         {
           theta3 = i * (M_PI+M_PI) / slices;
 
-          if (wire && i != 0)
+          if (wire_p && i != 0)
             {
               glVertex3f (lb.x, lb.y, lb.z);
               glVertex3f (la.x, la.y, la.z);
@@ -76,7 +86,7 @@ unit_sphere (int stacks, int slices, Bool wire)
           glTexCoord2f (i       / (double)slices,
                         2*(j+1) / (double)stacks2);
           glVertex3f (p.x, p.y, p.z);
-          if (wire) la = p;
+          if (wire_p) la = p;
 
           e.x = cos(theta1) * cos(theta3);
           e.y = sin(theta1);
@@ -89,8 +99,10 @@ unit_sphere (int stacks, int slices, Bool wire)
           glTexCoord2f (i   / (double)slices,
                         2*j / (double)stacks2);
           glVertex3f (p.x, p.y, p.z);
-          if (wire) lb = p;
+          if (wire_p) lb = p;
+          polys++;
         }
       glEnd();
     }
+  return polys;
 }