--- ray/src/hd/rhdisp.c	1998/10/06 18:09:49	3.33
+++ ray/src/hd/rhdisp.c	2003/05/13 17:58:33	3.45
@@ -1,9 +1,6 @@
-/* Copyright (c) 1998 Silicon Graphics, Inc. */
-
 #ifndef lint
-static char SCCSid[] = "$SunId$ SGI";
+static const char	RCSid[] = "$Id: rhdisp.c,v 3.45 2003/05/13 17:58:33 greg Exp $";
 #endif
-
 /*
  * Holodeck display process.
  */
@@ -18,8 +15,23 @@ static char SCCSid[] = "$SunId$ SGI";
 #define VIEWHISTLEN	4	/* number of remembered views */
 #endif
 
+#ifndef FSIZDEF
+#define FSIZDEF		0.125	/* default focus frame size */
+#endif
+
+#if defined(freebsd)
+#define fbufcnt(f)	((f)->_r)
+#elif defined(__GNUC__)
+#define fbufcnt(f)	((f)->_IO_read_end - (f)->_IO_read_ptr)
+#else
+#define fbufcnt(f)	((f)->_cnt)
+#endif
+
 HOLO	*hdlist[HDMAX+1];	/* global holodeck list */
 
+char	*hdgfn[HDMAX];		/* holodeck section geometry list */
+char	*hdpfn[HDMAX];		/* section portal list */
+
 char	cmdlist[DC_NCMDS][8] = DC_INIT;
 
 int	imm_mode = 0;		/* bundles are being delivered immediately */
@@ -33,7 +45,6 @@ char	*progname;		/* global argv[0] */
 FILE	*sstdin, *sstdout;	/* server's standard input and output */
 
 #ifdef DEBUG
-#include <sys/types.h>
 extern time_t	time();
 static time_t	tmodesw;
 static time_t	timm, tadd;
@@ -49,7 +60,6 @@ main(argc, argv)
 int	argc;
 char	*argv[];
 {
-	extern int	eputs();
 	int	rdy, inp, res = 0, pause = 0;
 
 	progname = argv[0];
@@ -84,10 +94,14 @@ char	*argv[];
 			inp = dev_input();
 			if (inp & DFL(DC_SETVIEW))
 				new_view(&odev.v);
+			else if (inp & DFL(DC_LASTVIEW))
+				new_view(NULL);
+			if (inp & DFL(DC_REDRAW))
+				imm_mode = beam_sync(1) > 0;
 			if (inp & DFL(DC_GETVIEW))
 				printview();
-			if (inp & DFL(DC_LASTVIEW))
-				new_view(NULL);
+			if (inp & DFL(DC_FOCUS))
+				set_focus(odev_args);
 			if (inp & DFL(DC_KILL)) {
 				serv_request(DR_KILL, 0, NULL);
 				pause = 0;
@@ -104,12 +118,10 @@ char	*argv[];
 			}
 			if (inp & DFL(DC_PAUSE))
 				pause = 1;
-			if (inp & DFL(DC_REDRAW))
-				imm_mode = beam_sync(1) > 0;
 			if (inp & DFL(DC_QUIT))
 				serv_request(DR_SHUTDOWN, 0, NULL);
 		}
-		if (rdy & RDY_SIN)		/* user input from sstdin */
+		if (rdy & RDY_SIN && !imm_mode)	/* user input from sstdin */
 			switch (usr_input()) {
 			case DC_PAUSE:
 				pause = 1;
@@ -146,10 +158,12 @@ disp_wait()			/* wait for more input */
 	int	n;
 	register int	i;
 				/* see if we can avoid select call */
+	if (hdlist[0] == NULL)
+		return(RDY_SRV);	/* initialize first */
 	flgs = 0;		/* flag what's ready already */
-	if (imm_mode || stdin->_cnt > 0)
+	if (imm_mode || fbufcnt(stdin) > 0)
 		flgs |= RDY_SRV;
-	if (sstdin != NULL && sstdin->_cnt > 0)
+	if (sstdin != NULL && fbufcnt(sstdin) > 0)
 		flgs |= RDY_SIN;
 	if (odev.inpready)
 		flgs |= RDY_DEV;
@@ -187,8 +201,9 @@ disp_wait()			/* wait for more input */
 }
 
 
-add_holo(hdg)			/* register a new holodeck section */
+add_holo(hdg, gfn, pfn)		/* register a new holodeck section */
 HDGRID	*hdg;
+char	*gfn, *pfn;
 {
 	VIEW	nv;
 	double	d;
@@ -201,8 +216,10 @@ HDGRID	*hdg;
 	hdlist[hd] = (HOLO *)malloc(sizeof(HOLO));
 	if (hdlist[hd] == NULL)
 		error(SYSTEM, "out of memory in add_holo");
-	bcopy((char *)hdg, (char *)hdlist[hd], sizeof(HDGRID));
+	bcopy((void *)hdg, (void *)hdlist[hd], sizeof(HDGRID));
 	hdcompgrid(hdlist[hd]);
+	hdgfn[hd] = savestr(gfn);
+	hdpfn[hd] = pfn && *pfn ? savestr(pfn) : (char *)NULL;
 	if (hd)
 		return;
 					/* set initial viewpoint */
@@ -258,6 +275,7 @@ register VIEW	*v;
 	static unsigned	nhist;
 	VIEW	*dv;
 	int	i, res[2];
+	int2	*slist;
 	char	*err;
 				/* restore previous view? */
 	if (v == NULL) {
@@ -273,24 +291,30 @@ again:
 		error(COMMAND, err);
 		return;
 	}
+	if (!dev_view(v))	/* notify display driver */
+		goto again;
 	if (v->type == VT_PAR) {
 		error(COMMAND, "cannot handle parallel views");
 		return;
 	}
-	if (!dev_view(v))	/* notify display driver */
-		goto again;
-	dev_flush();		/* update screen */
-	beam_init(0);		/* compute new beam set */
-	for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++)
-		if (!beam_view(dv, res[0], res[1])) {
+	beam_init(odev.firstuse);	/* compute new beam set */
+	for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++) {
+		if ((slist = beam_view(dv, res[0], res[1])) == NULL) {
 			if (!nhist) {
 				error(COMMAND, "invalid starting view");
 				return;
 			}
 			copystruct(v, viewhist + ((nhist-1)%VIEWHISTLEN));
-			goto again;
+			goto again;	/* poss. overloading dev_section()? */
 		}
-	beam_sync(0);		/* update server */
+		DCHECK(*slist < 0, WARNING, "no visible sections in new_view");
+		for ( ; *slist >= 0; slist++)
+			dev_section(hdgfn[*slist], hdpfn[*slist]);
+	}
+	dev_section(NULL,NULL);	/* end section list */
+	dev_flush();		/* update display */
+				/* update server */
+	imm_mode = beam_sync(odev.firstuse) > 0;
 				/* record new view */
 	if (v < viewhist || v >= viewhist+VIEWHISTLEN) {
 		copystruct(viewhist + (nhist%VIEWHISTLEN), v);
@@ -299,6 +323,66 @@ again:
 }
 
 
+set_focus(args)			/* set focus frame */
+char	*args;
+{
+	double	hcent, vcent, hsiz, vsiz;
+	VIEW	*dv, vwfocus;
+	int	i, res[2];
+
+	i = sscanf(args, "%lf %lf %lf %lf", &hcent, &vcent, &hsiz, &vsiz);
+	if (i < 2 || hcent < 0 || hcent > 1 || vcent < 0 || vcent > 1) {
+		beam_init(0);				/* restore view */
+		for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++)
+			beam_view(dv, res[0], res[1]);
+		beam_sync(0);				/* update server */
+		return;
+	}
+	if (i < 4 || hsiz <= hcent || hsiz > 1 || vsiz <= vcent || vsiz > 1)
+		hsiz = vsiz = FSIZDEF;			/* gave center only */
+	else {
+		hsiz -= hcent; hcent += 0.5*hsiz;	/* gave min and max */
+		vsiz -= vcent; vcent += 0.5*vsiz;
+	}
+	beam_init(0);					/* add basic views */
+	for (i = 0; (dv = dev_auxview(i, res)) != NULL; i++)
+		beam_view(dv, res[0]>>4, res[1]>>4);
+	copystruct(&vwfocus, &odev.v);			/* add focus view */
+	switch (odev.v.type) {
+	case VT_PER:
+		vwfocus.horiz = 2.*180./PI*atan(
+				hsiz * tan(PI/180./2.*odev.v.horiz) );
+		vwfocus.vert = 2.*180./PI*atan(
+				vsiz * tan(PI/180./2.*odev.v.vert) );
+		break;
+	case VT_PAR:
+	case VT_ANG:
+		vwfocus.horiz = hsiz * odev.v.horiz;
+		vwfocus.vert = vsiz * odev.v.vert;
+		break;
+	case VT_HEM:
+		vwfocus.horiz = 2.*180./PI*asin(
+				hsiz * sin(PI/180./2.*odev.v.horiz) );
+		vwfocus.vert = 2.*180./PI*asin(
+				vsiz * sin(PI/180./2.*odev.v.vert) );
+		break;
+	case VT_CYL:
+		vwfocus.horiz = hsiz * odev.v.horiz;
+		vwfocus.vert = 2.*180./PI*atan(
+				vsiz * tan(PI/180./2.*odev.v.vert) );
+		break;
+	default:
+		error(INTERNAL, "bad view type in set_focus");
+	}
+	vwfocus.hoff = (odev.v.hoff + hcent - 0.5)/hsiz;
+	vwfocus.voff = (odev.v.voff + vcent - 0.5)/vsiz;
+	setview(&vwfocus);
+	beam_view(&vwfocus, (int)(3*odev.hres*hsiz)+100,
+			(int)(3*odev.vres*vsiz)+100);
+	beam_sync(0);					/* update server */
+}
+
+
 int
 usr_input()			/* get user input and process it */
 {
@@ -341,6 +425,9 @@ usr_input()			/* get user input and process it */
 	case DC_LASTVIEW:		/* restore previous view */
 		new_view(NULL);
 		break;
+	case DC_FOCUS:			/* set focus frame */
+		set_focus(args);
+		break;
 	case DC_PAUSE:			/* pause the current calculation */
 	case DC_RESUME:			/* resume the calculation */
 		/* handled in main() */
@@ -392,7 +479,8 @@ serv_result()			/* get next server result and process 
 			if (buf == NULL)
 				buf = (char *)malloc(bufsiz=msg.nbytes);
 			else
-				buf = (char *)realloc(buf, bufsiz=msg.nbytes);
+				buf = (char *)realloc((void *)buf,
+						bufsiz=msg.nbytes);
 			if (buf == NULL)
 				error(SYSTEM, "out of memory in serv_result");
 		}
@@ -407,9 +495,10 @@ serv_result()			/* get next server result and process 
 		disp_bundle((PACKHEAD *)buf);
 		break;
 	case DS_ADDHOLO:
-		if (msg.nbytes != sizeof(HDGRID))
+		if (msg.nbytes < sizeof(HDGRID)+2)
 			error(INTERNAL, "bad holodeck record from server");
-		add_holo((HDGRID *)buf);
+		add_holo((HDGRID *)buf, buf+sizeof(HDGRID),
+			buf+sizeof(HDGRID)+strlen(buf+sizeof(HDGRID))+1);
 		break;
 	case DS_OUTSECT:
 		do_outside = 1;
@@ -420,15 +509,16 @@ serv_result()			/* get next server result and process 
 		break;
 	case DS_STARTIMM:
 	case DS_ENDIMM:
+		if (!(imm_mode = msg.type==DS_STARTIMM))
+			dev_flush();
 #ifdef DEBUG
-		if (imm_mode != (msg.type==DS_STARTIMM)) {
+		{
 			time_t	tnow = time(NULL);
-			if (imm_mode) timm += tnow - tmodesw;
-			else tadd += tnow - tmodesw;
+			if (msg.type==DS_STARTIMM) tadd += tnow - tmodesw;
+			else timm += tnow - tmodesw;
 			tmodesw = tnow;
 		}
 #endif
-		imm_mode = msg.type==DS_STARTIMM;
 		goto noargs;
 	case DS_ACKNOW:
 	case DS_SHUTDOWN:
@@ -458,10 +548,8 @@ char	*p;
 	MSGHEAD	msg;
 	int	m;
 				/* consistency checks */
-#ifdef DEBUG
-	if (nbytes < 0 || nbytes > 0 & p == NULL)
-		error(CONSISTENCY, "bad buffer handed to serv_request");
-#endif
+	DCHECK(nbytes < 0 || nbytes > 0 & p == NULL,
+			CONSISTENCY, "bad buffer handed to serv_request");
 				/* get server's attention for big request */
 	if (nbytes >= BIGREQSIZ-sizeof(MSGHEAD)) {
 		serv_request(DR_ATTEN, 0, NULL);
@@ -479,6 +567,7 @@ char	*p;
 }
 
 
+void
 eputs(s)			/* put error message to stderr */
 register char  *s;
 {
@@ -498,10 +587,13 @@ register char  *s;
 }
 
 
+void
 quit(code)			/* clean up and exit */
 int	code;
 {
+	if (code)
+		exit(code);
 	if (odev.v.type)
 		dev_close();
-	exit(code);
+	exit(0);
 }