--- ray/src/common/fvect.h	2012/09/06 00:07:43	2.14
+++ ray/src/common/fvect.h	2014/12/04 05:26:27	2.17
@@ -1,4 +1,4 @@
-/* RCSid $Id: fvect.h,v 2.14 2012/09/06 00:07:43 greg Exp $ */
+/* RCSid $Id: fvect.h,v 2.17 2014/12/04 05:26:27 greg Exp $ */
 /*
  * Declarations for floating-point vector operations.
  */
@@ -11,9 +11,11 @@ extern "C" {
 #ifdef  SMLFLT
 #define  RREAL		float
 #define  FTINY		(1e-3)
+#define  FVFORMAT	"%f %f %f"
 #else
 #define  RREAL		double
 #define  FTINY		(1e-6)
+#define  FVFORMAT	"%lf %lf %lf"
 #endif
 #define  FHUGE		(1e10)
 
@@ -40,6 +42,8 @@ typedef RREAL  FVECT[3];
 #define	GEOD_ABS	1	/* absolute geodesic distance */
 #define	GEOD_REL	2	/* relative geodesic distance */
 
+extern double	Acos(double x);
+extern double	Asin(double x);
 extern double	fdot(const FVECT v1, const FVECT v2);
 extern double	dist2(const FVECT v1, const FVECT v2);
 extern double	dist2line(const FVECT p, const FVECT ep1, const FVECT ep2);
@@ -47,6 +51,7 @@ extern double	dist2lseg(const FVECT p, const FVECT ep1
 extern void	fcross(FVECT vres, const FVECT v1, const FVECT v2);
 extern void	fvsum(FVECT vres, const FVECT v0, const FVECT v1, double f);
 extern double	normalize(FVECT v);
+extern int	getperpendicular(FVECT vp, const FVECT v);
 extern int	closestapproach(RREAL t[2],
 			const FVECT rorg0, const FVECT rdir0,
 			const FVECT rorg1, const FVECT rdir1);