less repetition of vertices for triangle strip

git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@1268 7f0cb862-5218-0410-a997-914c9d46530a

diff --git a/src/fg_geometry.c b/src/fg_geometry.c
index 8926dcf..fd79981 100644 (file)
--- a/src/fg_geometry.c
+++ b/src/fg_geometry.c
@@ -1883,28 +1883,30 @@ void FGAPIENTRY glutSolidTorus( double dInnerRadius, double dOuterRadius, GLint
 
     for( i=0; i<nSides; i++ )
     {
+        int offset;
+
         int ioff = 3;
         if (i==nSides-1)
             ioff = -i*3;
+
         glBegin( GL_TRIANGLE_STRIP );
         for( j=0; j<nRings; j++ )
         {
-            int offset = 3 * ( j * nSides + i ) ;
-            glNormal3fv( normal + offset );
-            glVertex3fv( vertex + offset );
-            glNormal3fv( normal + offset + ioff );
-            glVertex3fv( vertex + offset + ioff );
-
-            offset = 3 * ( ((j+1)%nRings) * nSides + i) ;
+            offset = 3 * ( j * nSides + i ) ;
             glNormal3fv( normal + offset );
             glVertex3fv( vertex + offset );
             glNormal3fv( normal + offset + ioff );
             glVertex3fv( vertex + offset + ioff );
         }
+        /* repeat first to close off shape */
+        offset = 3 * i;
+        glNormal3fv( normal + offset );
+        glVertex3fv( vertex + offset );
+        glNormal3fv( normal + offset + ioff );
+        glVertex3fv( vertex + offset + ioff );
         glEnd();
     }
 
-
     free ( vertex ) ;
     free ( normal ) ;
 }