src/rt/rv3.c

#ifndef lint
static const char       RCSid[] = "$Id: rv3.c,v 2.41 2018/11/07 18:34:58 greg Exp $";
#endif
/*
 *  rv3.c - miscellaneous routines for rview.
 *
 *  External symbols declared in rpaint.h
 */

#include "copyright.h"

#include <string.h>

#include  "ray.h"
#include  "rpaint.h"
#include  "otypes.h"
#include  "otspecial.h"
#include  "random.h"

#ifndef WFLUSH
#define WFLUSH          64              /* flush after this many primary rays */
#endif
#ifndef WFLUSH1
#define WFLUSH1         512             /* or this many total rays */
#endif


#ifdef  SMLFLT
#define  sscanvec(s,v)  (sscanf(s,"%f %f %f",v,v+1,v+2)==3)
#else
#define  sscanvec(s,v)  (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3)
#endif

extern int      ray_pnprocs;

static RNUMBER  niflush;                /* flushes since newimage() */

int
getrect(                                /* get a box */
        char  *s,
        RECT  *r
)
{
        int  x0, y0, x1, y1;

        if (*s && !strncmp(s, "all", strlen(s))) {
                r->l = r->d = 0;
                r->r = hresolu;
                r->u = vresolu;
                return(0);
        }
        if (sscanf(s, "%d %d %d %d", &x0, &y0, &x1, &y1) != 4) {
                if (dev->getcur == NULL)
                        return(-1);
                (*dev->comout)("Pick first corner\n");
                if ((*dev->getcur)(&x0, &y0) == ABORT)
                        return(-1);
                (*dev->comout)("Pick second corner\n");
                if ((*dev->getcur)(&x1, &y1) == ABORT)
                        return(-1);
        }
        if (x0 < x1) {
                r->l = x0;
                r->r = x1;
        } else {
                r->l = x1;
                r->r = x0;
        }
        if (y0 < y1) {
                r->d = y0;
                r->u = y1;
        } else {
                r->d = y1;
                r->u = y0;
        }
        if (r->l < 0) r->l = 0;
        if (r->d < 0) r->d = 0;
        if (r->r > hresolu) r->r = hresolu;
        if (r->u > vresolu) r->u = vresolu;
        if (r->l > r->r) r->l = r->r;
        if (r->d > r->u) r->d = r->u;
        return(0);
}


int
getinterest(            /* get area of interest */
        char  *s,
        int  direc,
        FVECT  vec,
        double  *mp
)
{
        int  x, y;
        RAY  thisray;
        int  i;

        if (sscanf(s, "%lf", mp) != 1)
                *mp = 1.0;
        else if (*mp < -FTINY)          /* negative zoom is reduction */
                *mp = -1.0 / *mp;
        else if (*mp <= FTINY) {        /* too small */
                error(COMMAND, "illegal magnification");
                return(-1);
        }
        if (!sscanvec(sskip(s), vec)) {
                if (dev->getcur == NULL)
                        return(-1);
                (*dev->comout)("Pick view center\n");
                if ((*dev->getcur)(&x, &y) == ABORT)
                        return(-1);
                if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir,
                        &ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) {
                        error(COMMAND, "not on image");
                        return(-1);
                }
                if (!direc || ourview.type == VT_PAR) {
                        rayorigin(&thisray, PRIMARY, NULL, NULL);
                        while (localhit(&thisray, &thescene)) {
                                OBJREC  *m = findmaterial(thisray.ro);
                                if (m != NULL && !istransp(m->otype) &&
                                                !isBSDFproxy(m) &&
                                                (thisray.clipset == NULL ||
                                                        !inset(thisray.clipset,
                                                            thisray.ro->omod)))
                                        break;          /* found something */
                                VCOPY(thisray.rorg, thisray.rop);
                                rayclear(&thisray);     /* skip invisible */
                        }
                        if ((thisray.ro == NULL) | (thisray.ro == &Aftplane)) {
                                error(COMMAND, "not a local object");
                                return(-1);
                        }
                }
                if (direc)
                        if (ourview.type == VT_PAR)
                                for (i = 0; i < 3; i++)
                                        vec[i] = thisray.rop[i] - ourview.vp[i];
                        else
                                VCOPY(vec, thisray.rdir);
                else
                        VCOPY(vec, thisray.rop);
        } else if (direc) {
                for (i = 0; i < 3; i++)
                        vec[i] -= ourview.vp[i];
                if (normalize(vec) == 0.0) {
                        error(COMMAND, "point at view origin");
                        return(-1);
                }
        }
        return(0);
}


COLORV *
greyof(                         /* convert color to greyscale */
        COLOR  col
)
{
        static COLOR  gcol;
        double  b;

        b = bright(col);
        setcolor(gcol, b, b, b);
        return(gcol);
}

static void
recolor(                                        /* recolor the given node */
        PNODE *p
)
{
        while (p->kid != NULL) {                /* need to propogate down */
                int  mx = (p->xmin + p->xmax) >> 1;
                int  my = (p->ymin + p->ymax) >> 1;
                int  ki;
                if (p->x >= mx)
                        ki = (p->y >= my) ? UR : DR;
                else
                        ki = (p->y >= my) ? UL : DL;
                pcopy(p, p->kid+ki);
                p = p->kid + ki;
        }

        (*dev->paintr)(greyscale?greyof(p->v):p->v,
                        p->xmin, p->ymin, p->xmax, p->ymax);
}

int
paint(                  /* compute and paint a rectangle */
        PNODE  *p
)
{
        static RAY  thisray;
        double  h, v;

        if ((p->xmax <= p->xmin) | (p->ymax <= p->ymin)) {      /* empty */
                p->x = p->xmin;
                p->y = p->ymin;
                setcolor(p->v, 0.0, 0.0, 0.0);
                return(0);
        }
                                                /* jitter ray direction */
        p->x = h = p->xmin + (p->xmax-p->xmin)*frandom();
        p->y = v = p->ymin + (p->ymax-p->ymin)*frandom();
        
        if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, &ourview,
                        h/hresolu, v/vresolu)) < -FTINY) {
                setcolor(thisray.rcol, 0.0, 0.0, 0.0);
        } else if (!ray_pnprocs) {              /* immediate mode */
                ray_trace(&thisray);
        } else {                                /* queuing mode */
                int     rval;
                rayorigin(&thisray, PRIMARY, NULL, NULL);
                thisray.rno = (RNUMBER)p;
                rval = ray_pqueue(&thisray);
                if (!rval)
                        return(0);
                if (rval < 0)
                        return(-1);
                                                /* get node for returned ray */
                p = (PNODE *)thisray.rno;
        }

        copycolor(p->v, thisray.rcol);
        scalecolor(p->v, exposure);

        recolor(p);                             /* paint it */

        if (dev->flush != NULL) {               /* shall we check for input? */
                static RNUMBER  lastflush = 0;
                RNUMBER         counter = raynum;
                int             flushintvl;
                if (!ray_pnprocs) {
                        counter = nrays;
                        flushintvl = WFLUSH1;
                } else if (ambounce == 0)
                        flushintvl = ray_pnprocs*WFLUSH;
                else if (niflush < WFLUSH)
                        flushintvl = ray_pnprocs*niflush/(ambounce*(ambounce>0)+1);
                else
                        flushintvl = ray_pnprocs*WFLUSH/(ambounce*(ambounce>0)+1);
                if (lastflush > counter)
                        lastflush = 0;          /* counter wrapped */

                if (counter - lastflush >= flushintvl) {
                        lastflush = counter;
                        (*dev->flush)();
                        niflush++;
                }
        }
        return(1);
}


int
waitrays(void)                                  /* finish up pending rays */
{
        int     nwaited = 0;
        int     rval;
        RAY     raydone;

        if (!ray_pnprocs)                       /* immediate mode? */
                return(0);
        while ((rval = ray_presult(&raydone, 0)) > 0) {
                PNODE  *p = (PNODE *)raydone.rno;
                copycolor(p->v, raydone.rcol);
                scalecolor(p->v, exposure);
                recolor(p);
                nwaited++;
        }
        if (rval < 0)
                return(-1);
        return(nwaited);
}


void
newimage(                                       /* start a new image */
        char *s
)
{
        int             newnp = 0;
                                                /* # rendering procs arg? */
        if (s != NULL)
                sscanf(s, "%d", &newnp);
                                                /* free old image */
        freepkids(&ptrunk);
                                                /* compute resolution */
        hresolu = dev->xsiz;
        vresolu = dev->ysiz;
        normaspect(viewaspect(&ourview), &dev->pixaspect, &hresolu, &vresolu);
        ptrunk.xmin = ptrunk.ymin = pframe.l = pframe.d = 0;
        ptrunk.xmax = pframe.r = hresolu;
        ptrunk.ymax = pframe.u = vresolu;
        pdepth = 0;
                                                /* clear device */
        (*dev->clear)(hresolu, vresolu);

        if (newparam) {                         /* (re)start rendering procs */
                if (ray_pnprocs)
                        ray_pclose(0);          /* should already be closed */
                if (newnp > 0)
                        nproc = newnp;
                if (nproc > 1)
                        ray_popen(nproc);
                newparam = 0;
        } else if ((newnp > 0) & (newnp != nproc)) {
                if (newnp == 1)                 /* change # rendering procs */
                        ray_pclose(0);
                else if (newnp < ray_pnprocs)
                        ray_pclose(ray_pnprocs - newnp);
                else
                        ray_popen(newnp - ray_pnprocs);
                nproc = newnp;
        }
        niflush = 0;                            /* get first value */
        paint(&ptrunk);
}


void
redraw(void)                            /* redraw the image */
{
        (*dev->clear)(hresolu, vresolu);
        (*dev->comout)("redrawing...\n");
        repaint(0, 0, hresolu, vresolu);
        (*dev->comout)("\n");
}


void
repaint(                                /* repaint a region */
        int  xmin,
        int  ymin,
        int  xmax,
        int  ymax
)
{
        RECT  reg;

        reg.l = xmin; reg.r = xmax;
        reg.d = ymin; reg.u = ymax;

        paintrect(&ptrunk, &reg);
}


void
paintrect(                              /* paint picture rectangle */
        PNODE  *p,
        RECT  *r
)
{
        int  mx, my;

        if (p->xmax - p->xmin <= 0 || p->ymax - p->ymin <= 0)
                return;

        if (p->kid == NULL) {
                (*dev->paintr)(greyscale?greyof(p->v):p->v,
                        p->xmin, p->ymin, p->xmax, p->ymax);    /* do this */
                return;
        }
        mx = (p->xmin + p->xmax) >> 1;                          /* do kids */
        my = (p->ymin + p->ymax) >> 1;
        if (mx > r->l) {
                if (my > r->d)
                        paintrect(p->kid+DL, r);
                if (my < r->u)
                        paintrect(p->kid+UL, r);
        }
        if (mx < r->r) {
                if (my > r->d)
                        paintrect(p->kid+DR, r);
                if (my < r->u)
                        paintrect(p->kid+UR, r);
        }
}


PNODE *
findrect(                               /* find a rectangle */
        int  x,
        int  y,
        PNODE  *p,
        int  pd
)
{
        int  mx, my;

        while (p->kid != NULL && pd--) {

                mx = (p->xmin + p->xmax) >> 1;
                my = (p->ymin + p->ymax) >> 1;

                if (x < mx) {
                        if (y < my) {
                                p = p->kid+DL;
                        } else {
                                p = p->kid+UL;
                        }
                } else {
                        if (y < my) {
                                p = p->kid+DR;
                        } else {
                                p = p->kid+UR;
                        }
                }
        }
        return(p);
}


void
compavg(                                /* recompute averages */
        PNODE   *p
)
{
        int     i, navg;
        
        if (p->kid == NULL)
                return;

        setcolor(p->v, .0, .0, .0);
        navg = 0;
        for (i = 0; i < 4; i++) {
                if (p->kid[i].xmin >= p->kid[i].xmax) continue;
                if (p->kid[i].ymin >= p->kid[i].ymax) continue;
                compavg(p->kid+i);
                addcolor(p->v, p->kid[i].v);
                navg++;
        }
        if (navg > 1)
                scalecolor(p->v, 1./navg);
}


void
scalepict(                              /* scale picture values */
        PNODE  *p,
        double  sf
)
{
        scalecolor(p->v, sf);           /* do this node */

        if (p->kid == NULL)
                return;
                                        /* do children */
        scalepict(p->kid+DL, sf);
        scalepict(p->kid+DR, sf);
        scalepict(p->kid+UL, sf);
        scalepict(p->kid+UR, sf);
}


void
getpictcolrs(                           /* get scanline from picture */
        int  yoff,
        COLR  *scan,
        PNODE  *p,
        int  xsiz,
        int  ysiz
)
{
        int  mx;
        int  my;

        if (p->kid == NULL) {                   /* do this node */
                setcolr(scan[0], colval(p->v,RED),
                                colval(p->v,GRN),
                                colval(p->v,BLU));
                for (mx = 1; mx < xsiz; mx++)
                        copycolr(scan[mx], scan[0]);
                return;
        }
                                                /* do kids */
        mx = xsiz >> 1;
        my = ysiz >> 1;
        if (yoff < my) {
                getpictcolrs(yoff, scan, p->kid+DL, mx, my);
                getpictcolrs(yoff, scan+mx, p->kid+DR, xsiz-mx, my);
        } else {
                getpictcolrs(yoff-my, scan, p->kid+UL, mx, ysiz-my);
                getpictcolrs(yoff-my, scan+mx, p->kid+UR, xsiz-mx, ysiz-my);
        }
}


void
freepkids(                              /* free pnode's children */
        PNODE  *p
)
{
        if (p->kid == NULL)
                return;
        freepkids(p->kid+DL);
        freepkids(p->kid+DR);
        freepkids(p->kid+UL);
        freepkids(p->kid+UR);
        free((void *)p->kid);
        p->kid = NULL;
}


void
newview(                                        /* change viewing parameters */
        VIEW  *vp
)
{
        char  *err;

        if ((err = setview(vp)) != NULL) {
                sprintf(errmsg, "view not set - %s", err);
                error(COMMAND, errmsg);
        } else if (memcmp((char *)vp, (char *)&ourview, sizeof(VIEW))) {
                oldview = ourview;
                ourview = *vp;
                newimage(NULL);
        }
}


void
moveview(                                       /* move viewpoint */
        double  angle,
        double  elev,
        double  mag,
        FVECT  vc
)
{
        double  d;
        VIEW  nv = ourview;
        int  i;

        spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.));
        if (elev != 0.0)
                geodesic(nv.vdir, nv.vdir, nv.vup, elev*(-PI/180.), GEOD_RAD);

        if (nv.type == VT_PAR) {
                nv.horiz /= mag;
                nv.vert /= mag;
                d = 0.0;                        /* don't move closer */
                for (i = 0; i < 3; i++)
                        d += (vc[i] - ourview.vp[i])*ourview.vdir[i];
        } else {
                d = sqrt(dist2(ourview.vp, vc)) / mag;
                if (nv.vfore > FTINY) {
                        nv.vfore += d - d*mag;
                        if (nv.vfore < 0.0) nv.vfore = 0.0;
                }
                if (nv.vaft > FTINY) {
                        nv.vaft += d - d*mag;
                        if (nv.vaft <= nv.vfore) nv.vaft = 0.0;
                }
                nv.vdist /= mag;
        }
        for (i = 0; i < 3; i++)
                nv.vp[i] = vc[i] - d*nv.vdir[i];
        newview(&nv);
}


void
pcopy(                                  /* copy paint node p1 into p2 */
        PNODE  *p1,
        PNODE  *p2
)
{
        copycolor(p2->v, p1->v);
        p2->x = p1->x;
        p2->y = p1->y;
}


void
zoomview(                               /* zoom in or out */
        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_PLS:                            /* planisphere fisheye */
                vp->horiz = sin((PI/180./2.)*vp->horiz) /
                                (1.0 + cos((PI/180./2.)*vp->horiz)) / zf;
                vp->horiz *= vp->horiz;
                vp->horiz = (2.*180./PI)*acos((1. - vp->horiz) /
                                                (1. + vp->horiz));
                vp->vert = sin((PI/180./2.)*vp->vert) /
                                (1.0 + cos((PI/180./2.)*vp->vert)) / zf;
                vp->vert *= vp->vert;
                vp->vert = (2.*180./PI)*acos((1. - vp->vert) /
                                                (1. + vp->vert));
                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) /
                                (PI/180./2.);
                vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) /
                                (PI/180./2.);
                return;
        case VT_HEM:                            /* hemispherical fisheye */
                vp->horiz = sin(vp->horiz*(PI/180./2.))/zf;
                if (vp->horiz >= 1.0-FTINY)
                        vp->horiz = 180.;
                else
                        vp->horiz = asin(vp->horiz) / (PI/180./2.);
                vp->vert = sin(vp->vert*(PI/180./2.))/zf;
                if (vp->vert >= 1.0-FTINY)
                        vp->vert = 180.;
                else
                        vp->vert = asin(vp->vert) / (PI/180./2.);
                return;
        }
}
Revision:	2.42
Committed:	Thu Nov 8 00:54:07 2018 UTC (5 years, 6 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.41:	+2 -3 lines
Log Message:	Moved findmaterial() from source.c to initotypes.c
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.42	static const char RCSid[] = "$Id: rv3.c,v 2.41 2018/11/07 18:34:58 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* rv3.c - miscellaneous routines for rview.
6			*
7	greg	2.10	* External symbols declared in rpaint.h
8			*/
9
10	greg	2.11	#include "copyright.h"
11	greg	1.1
12	schorsch	2.12	#include <string.h>
13
14	greg	1.1	#include "ray.h"
15			#include "rpaint.h"
16	greg	2.41	#include "otypes.h"
17			#include "otspecial.h"
18	greg	1.1	#include "random.h"
19	greg	1.7
20	greg	1.13	#ifndef WFLUSH
21	greg	2.29	#define WFLUSH 64 /* flush after this many primary rays */
22	greg	1.13	#endif
23	greg	2.29	#ifndef WFLUSH1
24			#define WFLUSH1 512 /* or this many total rays */
25			#endif
26
27	greg	1.7
28	greg	2.2	#ifdef SMLFLT
29			#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3)
30			#else
31			#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3)
32			#endif
33	greg	1.13
34	greg	2.37	extern int ray_pnprocs;
35
36	greg	2.32	static RNUMBER niflush; /* flushes since newimage() */
37	greg	2.2
38	greg	2.10	int
39	greg	2.22	getrect( /* get a box */
40			char *s,
41			RECT *r
42			)
43	greg	1.7	{
44			int x0, y0, x1, y1;
45
46			if (*s && !strncmp(s, "all", strlen(s))) {
47			r->l = r->d = 0;
48	greg	1.9	r->r = hresolu;
49			r->u = vresolu;
50	greg	1.7	return(0);
51			}
52			if (sscanf(s, "%d %d %d %d", &x0, &y0, &x1, &y1) != 4) {
53			if (dev->getcur == NULL)
54			return(-1);
55			(*dev->comout)("Pick first corner\n");
56			if ((*dev->getcur)(&x0, &y0) == ABORT)
57			return(-1);
58			(*dev->comout)("Pick second corner\n");
59			if ((*dev->getcur)(&x1, &y1) == ABORT)
60			return(-1);
61			}
62			if (x0 < x1) {
63			r->l = x0;
64			r->r = x1;
65			} else {
66			r->l = x1;
67			r->r = x0;
68			}
69			if (y0 < y1) {
70			r->d = y0;
71			r->u = y1;
72			} else {
73			r->d = y1;
74			r->u = y0;
75			}
76			if (r->l < 0) r->l = 0;
77			if (r->d < 0) r->d = 0;
78	greg	1.9	if (r->r > hresolu) r->r = hresolu;
79			if (r->u > vresolu) r->u = vresolu;
80	greg	1.7	if (r->l > r->r) r->l = r->r;
81			if (r->d > r->u) r->d = r->u;
82			return(0);
83			}
84
85
86	greg	2.10	int
87	greg	2.22	getinterest( /* get area of interest */
88			char *s,
89			int direc,
90			FVECT vec,
91			double *mp
92			)
93	greg	1.7	{
94			int x, y;
95			RAY thisray;
96	greg	2.22	int i;
97	greg	1.7
98			if (sscanf(s, "%lf", mp) != 1)
99			*mp = 1.0;
100			else if (mp < -FTINY) / negative zoom is reduction */
101			mp = -1.0 / mp;
102			else if (mp <= FTINY) { / too small */
103			error(COMMAND, "illegal magnification");
104			return(-1);
105			}
106	greg	2.2	if (!sscanvec(sskip(s), vec)) {
107	greg	1.7	if (dev->getcur == NULL)
108			return(-1);
109			(*dev->comout)("Pick view center\n");
110			if ((*dev->getcur)(&x, &y) == ABORT)
111			return(-1);
112	greg	2.6	if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir,
113			&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) {
114	greg	1.17	error(COMMAND, "not on image");
115			return(-1);
116			}
117	greg	1.7	if (!direc \|\| ourview.type == VT_PAR) {
118	greg	2.17	rayorigin(&thisray, PRIMARY, NULL, NULL);
119	greg	2.41	while (localhit(&thisray, &thescene)) {
120			OBJREC *m = findmaterial(thisray.ro);
121			if (m != NULL && !istransp(m->otype) &&
122			!isBSDFproxy(m) &&
123			(thisray.clipset == NULL \|\|
124			!inset(thisray.clipset,
125			thisray.ro->omod)))
126			break; /* found something */
127			VCOPY(thisray.rorg, thisray.rop);
128			rayclear(&thisray); /* skip invisible */
129			}
130	greg	2.42	if ((thisray.ro == NULL) \| (thisray.ro == &Aftplane)) {
131	greg	1.7	error(COMMAND, "not a local object");
132			return(-1);
133			}
134			}
135			if (direc)
136			if (ourview.type == VT_PAR)
137			for (i = 0; i < 3; i++)
138			vec[i] = thisray.rop[i] - ourview.vp[i];
139			else
140			VCOPY(vec, thisray.rdir);
141			else
142			VCOPY(vec, thisray.rop);
143	greg	2.15	} else if (direc) {
144			for (i = 0; i < 3; i++)
145			vec[i] -= ourview.vp[i];
146			if (normalize(vec) == 0.0) {
147			error(COMMAND, "point at view origin");
148			return(-1);
149			}
150			}
151	greg	1.7	return(0);
152			}
153	greg	1.1
154
155	greg	2.39	COLORV *
156	greg	2.22	greyof( /* convert color to greyscale */
157			COLOR col
158			)
159	greg	1.1	{
160			static COLOR gcol;
161			double b;
162
163			b = bright(col);
164			setcolor(gcol, b, b, b);
165			return(gcol);
166			}
167
168	greg	2.26	static void
169			recolor( /* recolor the given node */
170			PNODE *p
171			)
172			{
173			while (p->kid != NULL) { /* need to propogate down */
174			int mx = (p->xmin + p->xmax) >> 1;
175			int my = (p->ymin + p->ymax) >> 1;
176			int ki;
177			if (p->x >= mx)
178			ki = (p->y >= my) ? UR : DR;
179			else
180			ki = (p->y >= my) ? UL : DL;
181			pcopy(p, p->kid+ki);
182			p = p->kid + ki;
183			}
184
185			(*dev->paintr)(greyscale?greyof(p->v):p->v,
186			p->xmin, p->ymin, p->xmax, p->ymax);
187			}
188	greg	1.1
189	greg	2.22	int
190			paint( /* compute and paint a rectangle */
191			PNODE *p
192			)
193	greg	1.1	{
194			static RAY thisray;
195			double h, v;
196
197	greg	2.29	if ((p->xmax <= p->xmin) \| (p->ymax <= p->ymin)) { /* empty */
198	greg	2.22	p->x = p->xmin;
199			p->y = p->ymin;
200	greg	1.1	setcolor(p->v, 0.0, 0.0, 0.0);
201	greg	2.22	return(0);
202	greg	1.1	}
203			/* jitter ray direction */
204	greg	2.22	p->x = h = p->xmin + (p->xmax-p->xmin)*frandom();
205			p->y = v = p->ymin + (p->ymax-p->ymin)*frandom();
206	greg	1.1
207	greg	2.6	if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, &ourview,
208			h/hresolu, v/vresolu)) < -FTINY) {
209	greg	1.17	setcolor(thisray.rcol, 0.0, 0.0, 0.0);
210	greg	2.37	} else if (!ray_pnprocs) { /* immediate mode */
211	greg	2.29	ray_trace(&thisray);
212			} else { /* queuing mode */
213			int rval;
214	greg	2.17	rayorigin(&thisray, PRIMARY, NULL, NULL);
215	greg	2.32	thisray.rno = (RNUMBER)p;
216	greg	2.22	rval = ray_pqueue(&thisray);
217			if (!rval)
218			return(0);
219			if (rval < 0)
220			return(-1);
221	greg	2.33	/* get node for returned ray */
222	greg	2.22	p = (PNODE *)thisray.rno;
223	greg	1.17	}
224	greg	1.1
225			copycolor(p->v, thisray.rcol);
226			scalecolor(p->v, exposure);
227
228	greg	2.26	recolor(p); /* paint it */
229	greg	1.13
230	greg	2.29	if (dev->flush != NULL) { /* shall we check for input? */
231	greg	2.32	static RNUMBER lastflush = 0;
232			RNUMBER counter = raynum;
233			int flushintvl;
234	greg	2.37	if (!ray_pnprocs) {
235	greg	2.29	counter = nrays;
236			flushintvl = WFLUSH1;
237			} else if (ambounce == 0)
238	greg	2.37	flushintvl = ray_pnprocs*WFLUSH;
239	greg	2.29	else if (niflush < WFLUSH)
240	greg	2.40	flushintvl = ray_pnprocsniflush/(ambounce(ambounce>0)+1);
241	greg	2.29	else
242	greg	2.40	flushintvl = ray_pnprocsWFLUSH/(ambounce(ambounce>0)+1);
243	greg	2.31	if (lastflush > counter)
244			lastflush = 0; /* counter wrapped */
245	greg	2.29
246			if (counter - lastflush >= flushintvl) {
247			lastflush = counter;
248			(*dev->flush)();
249			niflush++;
250			}
251	greg	1.13	}
252	greg	2.22	return(1);
253			}
254
255
256			int
257	greg	2.24	waitrays(void) /* finish up pending rays */
258	greg	2.22	{
259			int nwaited = 0;
260			int rval;
261			RAY raydone;
262	greg	2.29
263	greg	2.37	if (!ray_pnprocs) /* immediate mode? */
264	greg	2.29	return(0);
265	greg	2.22	while ((rval = ray_presult(&raydone, 0)) > 0) {
266			PNODE p = (PNODE )raydone.rno;
267			copycolor(p->v, raydone.rcol);
268			scalecolor(p->v, exposure);
269	greg	2.26	recolor(p);
270	greg	2.22	nwaited++;
271			}
272			if (rval < 0)
273			return(-1);
274			return(nwaited);
275	greg	1.1	}
276
277
278	greg	2.10	void
279	greg	2.22	newimage( /* start a new image */
280			char *s
281			)
282	greg	1.1	{
283	greg	2.35	int newnp = 0;
284			/* # rendering procs arg? */
285			if (s != NULL)
286			sscanf(s, "%d", &newnp);
287	greg	1.1	/* free old image */
288			freepkids(&ptrunk);
289	greg	1.9	/* compute resolution */
290	greg	1.10	hresolu = dev->xsiz;
291			vresolu = dev->ysiz;
292	greg	1.11	normaspect(viewaspect(&ourview), &dev->pixaspect, &hresolu, &vresolu);
293	greg	2.22	ptrunk.xmin = ptrunk.ymin = pframe.l = pframe.d = 0;
294			ptrunk.xmax = pframe.r = hresolu;
295			ptrunk.ymax = pframe.u = vresolu;
296	greg	1.1	pdepth = 0;
297			/* clear device */
298	greg	1.9	(*dev->clear)(hresolu, vresolu);
299	greg	2.22
300			if (newparam) { /* (re)start rendering procs */
301	greg	2.37	if (ray_pnprocs)
302			ray_pclose(0); /* should already be closed */
303	greg	2.35	if (newnp > 0)
304			nproc = newnp;
305	greg	2.29	if (nproc > 1)
306			ray_popen(nproc);
307	greg	2.22	newparam = 0;
308	greg	2.35	} else if ((newnp > 0) & (newnp != nproc)) {
309			if (newnp == 1) /* change # rendering procs */
310			ray_pclose(0);
311			else if (newnp < ray_pnprocs)
312			ray_pclose(ray_pnprocs - newnp);
313			else
314			ray_popen(newnp - ray_pnprocs);
315			nproc = newnp;
316	greg	2.22	}
317	greg	2.23	niflush = 0; /* get first value */
318	greg	2.22	paint(&ptrunk);
319	greg	1.1	}
320
321
322	greg	2.10	void
323	greg	2.22	redraw(void) /* redraw the image */
324	greg	1.1	{
325	greg	1.9	(*dev->clear)(hresolu, vresolu);
326	greg	1.1	(*dev->comout)("redrawing...\n");
327	greg	1.9	repaint(0, 0, hresolu, vresolu);
328	greg	1.1	(*dev->comout)("\n");
329			}
330
331
332	greg	2.10	void
333	greg	2.22	repaint( /* repaint a region */
334			int xmin,
335			int ymin,
336			int xmax,
337			int ymax
338			)
339	greg	1.1	{
340			RECT reg;
341
342			reg.l = xmin; reg.r = xmax;
343			reg.d = ymin; reg.u = ymax;
344
345	greg	2.22	paintrect(&ptrunk, &reg);
346	greg	1.1	}
347
348
349	greg	2.10	void
350	greg	2.22	paintrect( /* paint picture rectangle */
351			PNODE *p,
352			RECT *r
353			)
354	greg	1.1	{
355			int mx, my;
356
357	greg	2.22	if (p->xmax - p->xmin <= 0 \|\| p->ymax - p->ymin <= 0)
358	greg	1.1	return;
359
360			if (p->kid == NULL) {
361			(*dev->paintr)(greyscale?greyof(p->v):p->v,
362	greg	2.22	p->xmin, p->ymin, p->xmax, p->ymax); /* do this */
363	greg	1.1	return;
364			}
365	greg	2.22	mx = (p->xmin + p->xmax) >> 1; /* do kids */
366			my = (p->ymin + p->ymax) >> 1;
367	greg	1.1	if (mx > r->l) {
368			if (my > r->d)
369	greg	2.22	paintrect(p->kid+DL, r);
370	greg	1.1	if (my < r->u)
371	greg	2.22	paintrect(p->kid+UL, r);
372	greg	1.1	}
373			if (mx < r->r) {
374			if (my > r->d)
375	greg	2.22	paintrect(p->kid+DR, r);
376	greg	1.1	if (my < r->u)
377	greg	2.22	paintrect(p->kid+UR, r);
378	greg	1.1	}
379			}
380
381
382			PNODE *
383	greg	2.22	findrect( /* find a rectangle */
384			int x,
385			int y,
386			PNODE *p,
387			int pd
388			)
389	greg	1.1	{
390			int mx, my;
391
392			while (p->kid != NULL && pd--) {
393
394	greg	2.22	mx = (p->xmin + p->xmax) >> 1;
395			my = (p->ymin + p->ymax) >> 1;
396	greg	1.1
397			if (x < mx) {
398			if (y < my) {
399			p = p->kid+DL;
400			} else {
401			p = p->kid+UL;
402			}
403			} else {
404			if (y < my) {
405			p = p->kid+DR;
406			} else {
407			p = p->kid+UR;
408			}
409			}
410			}
411			return(p);
412			}
413
414
415	greg	2.10	void
416	greg	2.27	compavg( /* recompute averages */
417			PNODE *p
418			)
419			{
420	greg	2.28	int i, navg;
421
422	greg	2.27	if (p->kid == NULL)
423			return;
424	greg	2.28
425	greg	2.27	setcolor(p->v, .0, .0, .0);
426	greg	2.28	navg = 0;
427			for (i = 0; i < 4; i++) {
428			if (p->kid[i].xmin >= p->kid[i].xmax) continue;
429			if (p->kid[i].ymin >= p->kid[i].ymax) continue;
430			compavg(p->kid+i);
431			addcolor(p->v, p->kid[i].v);
432			navg++;
433			}
434			if (navg > 1)
435			scalecolor(p->v, 1./navg);
436	greg	2.27	}
437
438
439			void
440	greg	2.22	scalepict( /* scale picture values */
441			PNODE *p,
442			double sf
443			)
444	greg	1.1	{
445			scalecolor(p->v, sf); /* do this node */
446
447			if (p->kid == NULL)
448			return;
449			/* do children */
450			scalepict(p->kid+DL, sf);
451			scalepict(p->kid+DR, sf);
452			scalepict(p->kid+UL, sf);
453			scalepict(p->kid+UR, sf);
454			}
455
456
457	greg	2.10	void
458	greg	2.22	getpictcolrs( /* get scanline from picture */
459			int yoff,
460			COLR *scan,
461			PNODE *p,
462			int xsiz,
463			int ysiz
464			)
465	greg	1.1	{
466	greg	2.22	int mx;
467	greg	1.1	int my;
468
469			if (p->kid == NULL) { /* do this node */
470			setcolr(scan[0], colval(p->v,RED),
471			colval(p->v,GRN),
472			colval(p->v,BLU));
473			for (mx = 1; mx < xsiz; mx++)
474			copycolr(scan[mx], scan[0]);
475			return;
476			}
477			/* do kids */
478			mx = xsiz >> 1;
479			my = ysiz >> 1;
480			if (yoff < my) {
481			getpictcolrs(yoff, scan, p->kid+DL, mx, my);
482			getpictcolrs(yoff, scan+mx, p->kid+DR, xsiz-mx, my);
483			} else {
484			getpictcolrs(yoff-my, scan, p->kid+UL, mx, ysiz-my);
485			getpictcolrs(yoff-my, scan+mx, p->kid+UR, xsiz-mx, ysiz-my);
486			}
487			}
488
489
490	greg	2.10	void
491	greg	2.22	freepkids( /* free pnode's children */
492			PNODE *p
493			)
494	greg	1.1	{
495			if (p->kid == NULL)
496			return;
497			freepkids(p->kid+DL);
498			freepkids(p->kid+DR);
499			freepkids(p->kid+UL);
500			freepkids(p->kid+UR);
501	greg	2.10	free((void *)p->kid);
502	greg	1.1	p->kid = NULL;
503			}
504
505
506	greg	2.10	void
507	greg	2.22	newview( /* change viewing parameters */
508			VIEW *vp
509			)
510	greg	1.1	{
511			char *err;
512
513	greg	1.6	if ((err = setview(vp)) != NULL) {
514	greg	1.1	sprintf(errmsg, "view not set - %s", err);
515			error(COMMAND, errmsg);
516	schorsch	2.12	} else if (memcmp((char )vp, (char )&ourview, sizeof(VIEW))) {
517	schorsch	2.13	oldview = ourview;
518			ourview = *vp;
519	greg	2.22	newimage(NULL);
520	greg	1.1	}
521			}
522
523
524	greg	2.10	void
525	greg	2.22	moveview( /* move viewpoint */
526			double angle,
527			double elev,
528			double mag,
529			FVECT vc
530			)
531	greg	1.1	{
532			double d;
533	greg	2.14	VIEW nv = ourview;
534	greg	2.22	int i;
535	greg	1.1
536			spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.));
537	greg	2.38	if (elev != 0.0)
538			geodesic(nv.vdir, nv.vdir, nv.vup, elev*(-PI/180.), GEOD_RAD);
539
540	greg	2.15	if (nv.type == VT_PAR) {
541			nv.horiz /= mag;
542			nv.vert /= mag;
543	greg	1.3	d = 0.0; /* don't move closer */
544	greg	1.2	for (i = 0; i < 3; i++)
545	greg	1.3	d += (vc[i] - ourview.vp[i])*ourview.vdir[i];
546	greg	1.1	} else {
547	greg	1.2	d = sqrt(dist2(ourview.vp, vc)) / mag;
548	greg	2.15	if (nv.vfore > FTINY) {
549	greg	2.8	nv.vfore += d - d*mag;
550			if (nv.vfore < 0.0) nv.vfore = 0.0;
551			}
552	greg	2.15	if (nv.vaft > FTINY) {
553	greg	2.8	nv.vaft += d - d*mag;
554			if (nv.vaft <= nv.vfore) nv.vaft = 0.0;
555			}
556	greg	2.16	nv.vdist /= mag;
557	greg	1.1	}
558	greg	1.2	for (i = 0; i < 3; i++)
559			nv.vp[i] = vc[i] - d*nv.vdir[i];
560	greg	1.1	newview(&nv);
561	greg	1.17	}
562
563
564	greg	2.10	void
565	greg	2.22	pcopy( /* copy paint node p1 into p2 */
566			PNODE *p1,
567			PNODE *p2
568			)
569	greg	2.10	{
570			copycolor(p2->v, p1->v);
571			p2->x = p1->x;
572			p2->y = p1->y;
573			}
574
575
576			void
577	greg	2.22	zoomview( /* zoom in or out */
578			VIEW *vp,
579			double zf
580			)
581	greg	1.17	{
582			switch (vp->type) {
583			case VT_PAR: /* parallel view */
584	greg	2.9	vp->horiz /= zf;
585			vp->vert /= zf;
586			return;
587	greg	1.17	case VT_ANG: /* angular fisheye */
588			vp->horiz /= zf;
589	greg	2.9	if (vp->horiz > 360.)
590			vp->horiz = 360.;
591	greg	1.17	vp->vert /= zf;
592	greg	2.9	if (vp->vert > 360.)
593			vp->vert = 360.;
594			return;
595	greg	2.21	case VT_PLS: /* planisphere fisheye */
596			vp->horiz = sin((PI/180./2.)*vp->horiz) /
597			(1.0 + cos((PI/180./2.)*vp->horiz)) / zf;
598			vp->horiz *= vp->horiz;
599			vp->horiz = (2.180./PI)acos((1. - vp->horiz) /
600			(1. + vp->horiz));
601			vp->vert = sin((PI/180./2.)*vp->vert) /
602			(1.0 + cos((PI/180./2.)*vp->vert)) / zf;
603			vp->vert *= vp->vert;
604			vp->vert = (2.180./PI)acos((1. - vp->vert) /
605			(1. + vp->vert));
606			return;
607	greg	2.9	case VT_CYL: /* cylindrical panorama */
608			vp->horiz /= zf;
609			if (vp->horiz > 360.)
610			vp->horiz = 360.;
611			vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / (PI/180./2.);
612	greg	1.17	return;
613			case VT_PER: /* perspective view */
614			vp->horiz = atan(tan(vp->horiz*(PI/180./2.))/zf) /
615			(PI/180./2.);
616			vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) /
617			(PI/180./2.);
618			return;
619			case VT_HEM: /* hemispherical fisheye */
620			vp->horiz = sin(vp->horiz*(PI/180./2.))/zf;
621			if (vp->horiz >= 1.0-FTINY)
622			vp->horiz = 180.;
623			else
624			vp->horiz = asin(vp->horiz) / (PI/180./2.);
625			vp->vert = sin(vp->vert*(PI/180./2.))/zf;
626			if (vp->vert >= 1.0-FTINY)
627			vp->vert = 180.;
628			else
629			vp->vert = asin(vp->vert) / (PI/180./2.);
630			return;
631			}
632	greg	1.1	}