--- ray/src/rt/rv3.c	1993/08/05 13:05:01	2.5
+++ ray/src/rt/rv3.c	2003/02/25 02:47:23	2.11
@@ -1,19 +1,16 @@
-/* Copyright (c) 1987 Regents of the University of California */
-
 #ifndef lint
-static char SCCSid[] = "$SunId$ LBL";
+static const char	RCSid[] = "$Id: rv3.c,v 2.11 2003/02/25 02:47:23 greg Exp $";
 #endif
-
 /*
  *  rv3.c - miscellaneous routines for rview.
  *
- *     5/11/87
+ *  External symbols declared in rpaint.h
  */
 
+#include "copyright.h"
+
 #include  "ray.h"
 
-#include  "octree.h"
-
 #include  "rpaint.h"
 
 #include  "random.h"
@@ -33,6 +30,7 @@ static char SCCSid[] = "$SunId$ LBL";
 #endif
 
 
+int
 getrect(s, r)				/* get a box */
 char  *s;
 register RECT  *r;
@@ -79,6 +77,7 @@ register RECT  *r;
 }
 
 
+int
 getinterest(s, direc, vec, mp)		/* get area of interest */
 char  *s;
 int  direc;
@@ -103,8 +102,8 @@ double  *mp;
 		(*dev->comout)("Pick view center\n");
 		if ((*dev->getcur)(&x, &y) == ABORT)
 			return(-1);
-		if (viewray(thisray.rorg, thisray.rdir, &ourview,
-				(x+.5)/hresolu, (y+.5)/vresolu) < 0) {
+		if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir,
+			&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) {
 			error(COMMAND, "not on image");
 			return(-1);
 		}
@@ -143,11 +142,11 @@ register COLOR  col;
 }
 
 
+void
 paint(p, xmin, ymin, xmax, ymax)	/* compute and paint a rectangle */
 register PNODE  *p;
 int  xmin, ymin, xmax, ymax;
 {
-	extern unsigned long  nrays;
 	static unsigned long  lastflush = 0;
 	static RAY  thisray;
 	double  h, v;
@@ -162,8 +161,8 @@ int  xmin, ymin, xmax, ymax;
 	h = xmin + (xmax-xmin)*frandom();
 	v = ymin + (ymax-ymin)*frandom();
 	
-	if (viewray(thisray.rorg, thisray.rdir, &ourview,
-			h/hresolu, v/vresolu) < 0) {
+	if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, &ourview,
+			h/hresolu, v/vresolu)) < -FTINY) {
 		setcolor(thisray.rcol, 0.0, 0.0, 0.0);
 	} else {
 		rayorigin(&thisray, NULL, PRIMARY, 1.0);
@@ -185,6 +184,7 @@ int  xmin, ymin, xmax, ymax;
 }
 
 
+void
 newimage()				/* start a new image */
 {
 						/* free old image */
@@ -205,6 +205,7 @@ newimage()				/* start a new image */
 }
 
 
+void
 redraw()				/* redraw the image */
 {
 	(*dev->clear)(hresolu, vresolu);
@@ -214,6 +215,7 @@ redraw()				/* redraw the image */
 }
 
 
+void
 repaint(xmin, ymin, xmax, ymax)			/* repaint a region */
 int  xmin, ymin, xmax, ymax;
 {
@@ -226,6 +228,7 @@ int  xmin, ymin, xmax, ymax;
 }
 
 
+void
 paintrect(p, xmin, ymin, xmax, ymax, r)		/* paint picture rectangle */
 register PNODE  *p;
 int  xmin, ymin, xmax, ymax;
@@ -296,6 +299,7 @@ int  pd;
 }
 
 
+void
 scalepict(p, sf)			/* scale picture values */
 register PNODE  *p;
 double  sf;
@@ -312,6 +316,7 @@ double  sf;
 }
 
 
+void
 getpictcolrs(yoff, scan, p, xsiz, ysiz)	/* get scanline from picture */
 int  yoff;
 register COLR  *scan;
@@ -342,15 +347,7 @@ int  xsiz, ysiz;
 }
 
 
-pcopy(p1, p2)				/* copy paint node p1 into p2 */
-register PNODE  *p1, *p2;
-{
-	copycolor(p2->v, p1->v);
-	p2->x = p1->x;
-	p2->y = p1->y;
-}
-
-
+void
 freepkids(p)				/* free pnode's children */
 register PNODE  *p;
 {
@@ -360,11 +357,12 @@ register PNODE  *p;
 	freepkids(p->kid+DR);
 	freepkids(p->kid+UL);
 	freepkids(p->kid+UR);
-	free((char *)p->kid);
+	free((void *)p->kid);
 	p->kid = NULL;
 }
 
 
+void
 newview(vp)				/* change viewing parameters */
 register VIEW  *vp;
 {
@@ -381,6 +379,7 @@ register VIEW  *vp;
 }
 
 
+void
 moveview(angle, elev, mag, vc)			/* move viewpoint */
 double  angle, elev, mag;
 FVECT  vc;
@@ -404,10 +403,20 @@ FVECT  vc;
 		d = 0.0;			/* don't move closer */
 		for (i = 0; i < 3; i++)
 			d += (vc[i] - ourview.vp[i])*ourview.vdir[i];
+		nv.vfore = ourview.vfore;
+		nv.vaft = ourview.vaft;
 	} else {
 		nv.horiz = ourview.horiz;
 		nv.vert = ourview.vert;
 		d = sqrt(dist2(ourview.vp, vc)) / mag;
+		if ((nv.vfore = ourview.vfore) > FTINY) {
+			nv.vfore += d - d*mag;
+			if (nv.vfore < 0.0) nv.vfore = 0.0;
+		}
+		if ((nv.vaft = ourview.vaft) > FTINY) {
+			nv.vaft += d - d*mag;
+			if (nv.vaft <= nv.vfore) nv.vaft = 0.0;
+		}
 	}
 	for (i = 0; i < 3; i++)
 		nv.vp[i] = vc[i] - d*nv.vdir[i];
@@ -415,15 +424,39 @@ FVECT  vc;
 }
 
 
-zoomview(vp, zf)			/* zoom in our out */
+void
+pcopy(p1, p2)				/* copy paint node p1 into p2 */
+register PNODE  *p1, *p2;
+{
+	copycolor(p2->v, p1->v);
+	p2->x = p1->x;
+	p2->y = p1->y;
+}
+
+
+void
+zoomview(vp, zf)			/* zoom in or out */
 register VIEW  *vp;
 double  zf;
 {
 	switch (vp->type) {
 	case VT_PAR:				/* parallel view */
+		vp->horiz /= zf;
+		vp->vert /= zf;
+		return;
 	case VT_ANG:				/* angular fisheye */
 		vp->horiz /= zf;
+		if (vp->horiz > 360.)
+			vp->horiz = 360.;
 		vp->vert /= zf;
+		if (vp->vert > 360.)
+			vp->vert = 360.;
+		return;
+	case VT_CYL:				/* cylindrical panorama */
+		vp->horiz /= zf;
+		if (vp->horiz > 360.)
+			vp->horiz = 360.;
+		vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / (PI/180./2.);
 		return;
 	case VT_PER:				/* perspective view */
 		vp->horiz = atan(tan(vp->horiz*(PI/180./2.))/zf) /