--- ray/src/common/fvect.h	1989/02/02 10:34:16	1.1
+++ ray/src/common/fvect.h	1992/01/17 13:27:49	2.2
@@ -2,9 +2,21 @@
 
 /* SCCSid "$SunId$ LBL" */
 
-typedef double  FVECT[3];
+#ifdef  SMLFLT
+#define  FLOAT		float
+#define  FTINY		(4e-4)
+#else
+#define  FLOAT		double
+#define  FTINY		(1e-6)
+#endif
+#define  FHUGE		(1e10)
 
+typedef FLOAT  FVECT[3];
+
 #define  VCOPY(v1,v2)	((v1)[0]=(v2)[0],(v1)[1]=(v2)[1],(v1)[2]=(v2)[2])
 #define  DOT(v1,v2)	((v1)[0]*(v2)[0]+(v1)[1]*(v2)[1]+(v1)[2]*(v2)[2])
+#define  VSUM(vr,v1,v2,f)	((vr)[0]=(v1)[0]+(f)*(v2)[0], \
+				(vr)[1]=(v1)[1]+(f)*(v2)[1], \
+				(vr)[2]=(v1)[2]+(f)*(v2)[2])
 
 extern double  sqrt(), fdot(), dist2(), dist2lseg(), dist2line(), normalize();