summaryrefslogtreecommitdiffstats
path: root/hacks/glx/normals.c
diff options
context:
space:
mode:
Diffstat (limited to 'hacks/glx/normals.c')
-rw-r--r--hacks/glx/normals.c49
1 files changed, 0 insertions, 49 deletions
diff --git a/hacks/glx/normals.c b/hacks/glx/normals.c
deleted file mode 100644
index a72f8ce..0000000
--- a/hacks/glx/normals.c
+++ /dev/null
@@ -1,49 +0,0 @@
-/* normals, Copyright (c) 2002-2004 Jamie Zawinski <jwz@jwz.org>
- *
- * Permission to use, copy, modify, distribute, and sell this software and its
- * documentation for any purpose is hereby granted without fee, provided that
- * the above copyright notice appear in all copies and that both that
- * copyright notice and this permission notice appear in supporting
- * documentation. No representations are made about the suitability of this
- * software for any purpose. It is provided "as is" without express or
- * implied warranty.
- *
- * Compute normal vectors for arbitrary triangles.
- */
-
-#include "screenhackI.h"
-#include "normals.h"
-
-/* Calculate the unit normal at p given two other points p1,p2 on the
- surface. The normal points in the direction of p1 crossproduct p2
- */
-XYZ
-calc_normal (XYZ p, XYZ p1, XYZ p2)
-{
- XYZ n, pa, pb;
- pa.x = p1.x - p.x;
- pa.y = p1.y - p.y;
- pa.z = p1.z - p.z;
- pb.x = p2.x - p.x;
- pb.y = p2.y - p.y;
- pb.z = p2.z - p.z;
- n.x = pa.y * pb.z - pa.z * pb.y;
- n.y = pa.z * pb.x - pa.x * pb.z;
- n.z = pa.x * pb.y - pa.y * pb.x;
- return (n);
-}
-
-/* Call glNormal3f() with a normal of the indicated triangle.
- */
-void
-do_normal(GLfloat x1, GLfloat y1, GLfloat z1,
- GLfloat x2, GLfloat y2, GLfloat z2,
- GLfloat x3, GLfloat y3, GLfloat z3)
-{
- XYZ p1, p2, p3, p;
- p1.x = x1; p1.y = y1; p1.z = z1;
- p2.x = x2; p2.y = y2; p2.z = z2;
- p3.x = x3; p3.y = y3; p3.z = z3;
- p = calc_normal (p1, p2, p3);
- glNormal3f (p.x, p.y, p.z);
-}