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/* Copyright (c) 1994 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* rv3.c - miscellaneous routines for rview. |
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* |
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* 5/11/87 |
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* External symbols declared in rpaint.h |
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*/ |
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#include "ray.h" |
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#include "copyright.h" |
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#include "octree.h" |
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#include <string.h> |
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#include "ray.h" |
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#include "rpaint.h" |
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#include "random.h" |
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#ifndef WFLUSH |
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#endif |
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int |
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getrect(s, r) /* get a box */ |
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char *s; |
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register RECT *r; |
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} |
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int |
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getinterest(s, direc, vec, mp) /* get area of interest */ |
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char *s; |
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int direc; |
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} |
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void |
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paint(p, xmin, ymin, xmax, ymax) /* compute and paint a rectangle */ |
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register PNODE *p; |
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int xmin, ymin, xmax, ymax; |
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{ |
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extern unsigned long nrays; |
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static unsigned long lastflush = 0; |
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static RAY thisray; |
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double h, v; |
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} |
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void |
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newimage() /* start a new image */ |
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{ |
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/* free old image */ |
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} |
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void |
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redraw() /* redraw the image */ |
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{ |
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(*dev->clear)(hresolu, vresolu); |
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} |
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void |
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repaint(xmin, ymin, xmax, ymax) /* repaint a region */ |
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int xmin, ymin, xmax, ymax; |
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{ |
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} |
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void |
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paintrect(p, xmin, ymin, xmax, ymax, r) /* paint picture rectangle */ |
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register PNODE *p; |
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int xmin, ymin, xmax, ymax; |
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} |
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void |
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scalepict(p, sf) /* scale picture values */ |
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register PNODE *p; |
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double sf; |
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} |
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void |
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getpictcolrs(yoff, scan, p, xsiz, ysiz) /* get scanline from picture */ |
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int yoff; |
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register COLR *scan; |
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} |
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pcopy(p1, p2) /* copy paint node p1 into p2 */ |
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register PNODE *p1, *p2; |
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{ |
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copycolor(p2->v, p1->v); |
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p2->x = p1->x; |
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p2->y = p1->y; |
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} |
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void |
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freepkids(p) /* free pnode's children */ |
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register PNODE *p; |
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{ |
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freepkids(p->kid+DR); |
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freepkids(p->kid+UL); |
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freepkids(p->kid+UR); |
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free((char *)p->kid); |
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free((void *)p->kid); |
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p->kid = NULL; |
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} |
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void |
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newview(vp) /* change viewing parameters */ |
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register VIEW *vp; |
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{ |
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if ((err = setview(vp)) != NULL) { |
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sprintf(errmsg, "view not set - %s", err); |
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error(COMMAND, errmsg); |
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} else if (bcmp((char *)vp, (char *)&ourview, sizeof(VIEW))) { |
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copystruct(&oldview, &ourview); |
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copystruct(&ourview, vp); |
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} else if (memcmp((char *)vp, (char *)&ourview, sizeof(VIEW))) { |
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oldview = ourview; |
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ourview = *vp; |
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newimage(); |
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} |
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} |
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void |
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moveview(angle, elev, mag, vc) /* move viewpoint */ |
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double angle, elev, mag; |
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FVECT vc; |
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nv.horiz = ourview.horiz; |
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nv.vert = ourview.vert; |
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d = sqrt(dist2(ourview.vp, vc)) / mag; |
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nv.vfore = ourview.vfore + d - d*mag; |
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if (nv.vfore < 0.0) nv.vfore = 0.0; |
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nv.vaft = ourview.vaft + d - d*mag; |
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if (nv.vaft < nv.vfore) nv.vaft = 0.0; |
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if ((nv.vfore = ourview.vfore) > FTINY) { |
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nv.vfore += d - d*mag; |
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if (nv.vfore < 0.0) nv.vfore = 0.0; |
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} |
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if ((nv.vaft = ourview.vaft) > FTINY) { |
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nv.vaft += d - d*mag; |
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if (nv.vaft <= nv.vfore) nv.vaft = 0.0; |
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} |
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} |
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for (i = 0; i < 3; i++) |
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nv.vp[i] = vc[i] - d*nv.vdir[i]; |
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} |
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zoomview(vp, zf) /* zoom in our out */ |
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void |
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pcopy(p1, p2) /* copy paint node p1 into p2 */ |
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register PNODE *p1, *p2; |
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{ |
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copycolor(p2->v, p1->v); |
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p2->x = p1->x; |
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p2->y = p1->y; |
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} |
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void |
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zoomview(vp, zf) /* zoom in or out */ |
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register VIEW *vp; |
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double zf; |
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{ |
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switch (vp->type) { |
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case VT_PAR: /* parallel view */ |
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vp->horiz /= zf; |
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vp->vert /= zf; |
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return; |
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case VT_ANG: /* angular fisheye */ |
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vp->horiz /= zf; |
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if (vp->horiz > 360.) |
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vp->horiz = 360.; |
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vp->vert /= zf; |
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if (vp->vert > 360.) |
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vp->vert = 360.; |
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return; |
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case VT_CYL: /* cylindrical panorama */ |
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vp->horiz /= zf; |
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if (vp->horiz > 360.) |
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vp->horiz = 360.; |
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vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / (PI/180./2.); |
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return; |
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case VT_PER: /* perspective view */ |
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vp->horiz = atan(tan(vp->horiz*(PI/180./2.))/zf) / |
