*** vector.h	Mon Oct 11 15:00:58 1993
--- vector.h.frac	Mon Oct 11 14:47:18 1993
***************
*** 22,30 ****
--- 22,33 ----
   * Revision 4.0  91/07/17  14:33:11  kolb
   * Initial version.
   * 
+  * Added VecNorm macro  93/01/21   [PhB]
+  * 
   */
  #ifndef VECTOR_H
  #define VECTOR_H
+ #include <math.h>
  /*
   * Constants used in projecting onto planes
   */
***************
*** 81,89 ****
--- 84,96 ----
  #define VecAddScaled(v1,s,v2,r)	(r)->x = (v1).x + (s)*(v2).x, \
  				 (r)->y = (v1).y + (s)*(v2).y, \
  				 (r)->z = (v1).z + (s)*(v2).z
+ #define VecNorm(a)              (sqrt(  (a).x*(a).x + \
+                                         (a).y*(a).y +  \
+                                         (a).z*(a).z   ))
  
  extern void	VecCross(), VecCoordSys(), MakeBump();
  extern Float	VecNormCross(), VecNormalize();
+ extern Float	VecDist();
  extern int	Refract();
  
  #endif /* VECTOR_H */