add a line clipping procedure based on the Liang-Barsky algorithm. (thanks jmi2k!)

1 files changed, 1 insertions, 0 deletions

diff --git a/graphics.h b/graphics.h
index 8e63b67..46f230d 100644
--- a/graphics.h
+++ b/graphics.h
@@ -67,6 +67,7 @@ Point3 world2vcs(Camera*, Point3);
 Point3 vcs2ndc(Camera*, Point3);
 Point3 world2ndc(Camera*, Point3);
 int isclipping(Point3);
+int clipline3(Point3*, Point3*);
 Point toviewport(Camera*, Point3);
 Point2 fromviewport(Camera*, Point);
 void perspective(Matrix3, double, double, double, double);