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/* Copyright (c) 1987 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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|
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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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*/ |
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|
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#include "ray.h" |
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|
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#include "octree.h" |
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|
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#include "rpaint.h" |
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|
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#include "random.h" |
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|
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#ifndef WFLUSH |
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#define WFLUSH 30 /* flush after this many rays */ |
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#endif |
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|
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|
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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 x0, y0, x1, y1; |
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|
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if (*s && !strncmp(s, "all", strlen(s))) { |
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r->l = r->d = 0; |
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r->r = hresolu; |
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r->u = vresolu; |
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return(0); |
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} |
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if (sscanf(s, "%d %d %d %d", &x0, &y0, &x1, &y1) != 4) { |
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if (dev->getcur == NULL) |
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return(-1); |
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(*dev->comout)("Pick first corner\n"); |
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if ((*dev->getcur)(&x0, &y0) == ABORT) |
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return(-1); |
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(*dev->comout)("Pick second corner\n"); |
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if ((*dev->getcur)(&x1, &y1) == ABORT) |
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return(-1); |
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} |
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if (x0 < x1) { |
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r->l = x0; |
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r->r = x1; |
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} else { |
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r->l = x1; |
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r->r = x0; |
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} |
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if (y0 < y1) { |
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r->d = y0; |
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r->u = y1; |
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} else { |
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r->d = y1; |
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r->u = y0; |
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} |
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if (r->l < 0) r->l = 0; |
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if (r->d < 0) r->d = 0; |
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if (r->r > hresolu) r->r = hresolu; |
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if (r->u > vresolu) r->u = vresolu; |
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if (r->l > r->r) r->l = r->r; |
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if (r->d > r->u) r->d = r->u; |
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return(0); |
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} |
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|
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|
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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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FVECT vec; |
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double *mp; |
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{ |
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int x, y; |
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RAY thisray; |
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register int i; |
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|
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if (sscanf(s, "%lf", mp) != 1) |
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*mp = 1.0; |
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else if (*mp < -FTINY) /* negative zoom is reduction */ |
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*mp = -1.0 / *mp; |
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else if (*mp <= FTINY) { /* too small */ |
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error(COMMAND, "illegal magnification"); |
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return(-1); |
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} |
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if (sscanf(s, "%*lf %lf %lf %lf", &vec[0], &vec[1], &vec[2]) != 3) { |
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if (dev->getcur == NULL) |
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return(-1); |
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(*dev->comout)("Pick view center\n"); |
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if ((*dev->getcur)(&x, &y) == ABORT) |
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return(-1); |
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if (viewray(thisray.rorg, thisray.rdir, &ourview, |
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(x+.5)/hresolu, (y+.5)/vresolu) < 0) { |
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error(COMMAND, "not on image"); |
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return(-1); |
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} |
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if (!direc || ourview.type == VT_PAR) { |
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rayorigin(&thisray, NULL, PRIMARY, 1.0); |
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if (!localhit(&thisray, &thescene)) { |
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error(COMMAND, "not a local object"); |
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return(-1); |
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} |
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} |
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if (direc) |
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if (ourview.type == VT_PAR) |
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for (i = 0; i < 3; i++) |
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vec[i] = thisray.rop[i] - ourview.vp[i]; |
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else |
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VCOPY(vec, thisray.rdir); |
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else |
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VCOPY(vec, thisray.rop); |
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} else if (direc) |
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for (i = 0; i < 3; i++) |
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vec[i] -= ourview.vp[i]; |
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return(0); |
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} |
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|
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|
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float * /* keep consistent with COLOR typedef */ |
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greyof(col) /* convert color to greyscale */ |
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register COLOR col; |
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{ |
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static COLOR gcol; |
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double b; |
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|
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b = bright(col); |
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setcolor(gcol, b, b, b); |
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return(gcol); |
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} |
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|
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|
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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 long nrays; |
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static 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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if (xmax - xmin <= 0 || ymax - ymin <= 0) { /* empty */ |
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p->x = xmin; |
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p->y = ymin; |
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setcolor(p->v, 0.0, 0.0, 0.0); |
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return; |
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} |
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/* jitter ray direction */ |
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h = xmin + (xmax-xmin)*frandom(); |
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v = ymin + (ymax-ymin)*frandom(); |
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|
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if (viewray(thisray.rorg, thisray.rdir, &ourview, |
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h/hresolu, v/vresolu) < 0) { |
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setcolor(thisray.rcol, 0.0, 0.0, 0.0); |
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} else { |
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rayorigin(&thisray, NULL, PRIMARY, 1.0); |
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rayvalue(&thisray); |
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} |
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|
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p->x = h; |
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p->y = v; |
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copycolor(p->v, thisray.rcol); |
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scalecolor(p->v, exposure); |
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|
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(*dev->paintr)(greyscale?greyof(p->v):p->v, xmin, ymin, xmax, ymax); |
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|
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if (dev->flush != NULL && nrays - lastflush >= WFLUSH) { |
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lastflush = nrays; |
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(*dev->flush)(); |
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} |
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} |
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|
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|
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newimage() /* start a new image */ |
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{ |
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/* free old image */ |
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freepkids(&ptrunk); |
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/* compute resolution */ |
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hresolu = dev->xsiz; |
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vresolu = dev->ysiz; |
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normaspect(viewaspect(&ourview), &dev->pixaspect, &hresolu, &vresolu); |
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pframe.l = pframe.d = 0; |
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pframe.r = hresolu; pframe.u = vresolu; |
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pdepth = 0; |
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/* clear device */ |
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(*dev->clear)(hresolu, vresolu); |
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/* get first value */ |
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paint(&ptrunk, 0, 0, hresolu, vresolu); |
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} |
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|
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|
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redraw() /* redraw the image */ |
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{ |
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(*dev->clear)(hresolu, vresolu); |
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(*dev->comout)("redrawing...\n"); |
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repaint(0, 0, hresolu, vresolu); |
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(*dev->comout)("\n"); |
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} |
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|
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|
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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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RECT reg; |
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|
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reg.l = xmin; reg.r = xmax; |
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reg.d = ymin; reg.u = ymax; |
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|
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paintrect(&ptrunk, 0, 0, hresolu, vresolu, ®); |
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} |
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|
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|
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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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register RECT *r; |
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{ |
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int mx, my; |
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|
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if (xmax - xmin <= 0 || ymax - ymin <= 0) |
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return; |
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|
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if (p->kid == NULL) { |
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(*dev->paintr)(greyscale?greyof(p->v):p->v, |
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xmin, ymin, xmax, ymax); /* do this */ |
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return; |
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} |
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mx = (xmin + xmax) >> 1; /* do kids */ |
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my = (ymin + ymax) >> 1; |
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if (mx > r->l) { |
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if (my > r->d) |
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paintrect(p->kid+DL, xmin, ymin, mx, my, r); |
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if (my < r->u) |
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paintrect(p->kid+UL, xmin, my, mx, ymax, r); |
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} |
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if (mx < r->r) { |
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if (my > r->d) |
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paintrect(p->kid+DR, mx, ymin, xmax, my, r); |
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if (my < r->u) |
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paintrect(p->kid+UR, mx, my, xmax, ymax, r); |
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} |
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} |
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|
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|
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PNODE * |
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findrect(x, y, p, r, pd) /* find a rectangle */ |
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int x, y; |
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register PNODE *p; |
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register RECT *r; |
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int pd; |
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{ |
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int mx, my; |
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|
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while (p->kid != NULL && pd--) { |
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|
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mx = (r->l + r->r) >> 1; |
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my = (r->d + r->u) >> 1; |
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|
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if (x < mx) { |
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r->r = mx; |
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if (y < my) { |
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r->u = my; |
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p = p->kid+DL; |
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} else { |
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r->d = my; |
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p = p->kid+UL; |
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} |
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} else { |
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r->l = mx; |
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if (y < my) { |
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r->u = my; |
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p = p->kid+DR; |
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} else { |
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r->d = my; |
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p = p->kid+UR; |
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} |
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} |
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} |
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return(p); |
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} |
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|
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|
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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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scalecolor(p->v, sf); /* do this node */ |
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|
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if (p->kid == NULL) |
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return; |
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/* do children */ |
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scalepict(p->kid+DL, sf); |
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scalepict(p->kid+DR, sf); |
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scalepict(p->kid+UL, sf); |
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scalepict(p->kid+UR, sf); |
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} |
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|
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|
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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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register PNODE *p; |
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int xsiz, ysiz; |
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{ |
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register int mx; |
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int my; |
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|
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if (p->kid == NULL) { /* do this node */ |
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setcolr(scan[0], colval(p->v,RED), |
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colval(p->v,GRN), |
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colval(p->v,BLU)); |
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for (mx = 1; mx < xsiz; mx++) |
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copycolr(scan[mx], scan[0]); |
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return; |
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} |
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/* do kids */ |
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mx = xsiz >> 1; |
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my = ysiz >> 1; |
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if (yoff < my) { |
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getpictcolrs(yoff, scan, p->kid+DL, mx, my); |
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getpictcolrs(yoff, scan+mx, p->kid+DR, xsiz-mx, my); |
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} else { |
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getpictcolrs(yoff-my, scan, p->kid+UL, mx, ysiz-my); |
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getpictcolrs(yoff-my, scan+mx, p->kid+UR, xsiz-mx, ysiz-my); |
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} |
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} |
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|
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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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|
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|
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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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if (p->kid == NULL) |
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return; |
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freepkids(p->kid+DL); |
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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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p->kid = NULL; |
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} |
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|
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|
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newview(vp) /* change viewing parameters */ |
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register VIEW *vp; |
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{ |
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char *err; |
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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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newimage(); |
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} |
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} |
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|
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|
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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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{ |
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extern double sqrt(), dist2(); |
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double d; |
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FVECT v1; |
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VIEW nv; |
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register int i; |
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|
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VCOPY(nv.vup, ourview.vup); |
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nv.hoff = ourview.hoff; nv.voff = ourview.voff; |
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spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.)); |
| 384 |
if (elev != 0.0) { |
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fcross(v1, ourview.vup, nv.vdir); |
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normalize(v1); |
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spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.)); |
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} |
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if ((nv.type = ourview.type) == VT_PAR) { |
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nv.horiz = ourview.horiz / mag; |
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nv.vert = ourview.vert / mag; |
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d = 0.0; /* don't move closer */ |
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for (i = 0; i < 3; i++) |
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d += (vc[i] - ourview.vp[i])*ourview.vdir[i]; |
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} else { |
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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; |
| 399 |
} |
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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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newview(&nv); |
| 403 |
} |
| 404 |
|
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|
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zoomview(vp, zf) /* zoom in our out */ |
| 407 |
register VIEW *vp; |
| 408 |
double zf; |
| 409 |
{ |
| 410 |
switch (vp->type) { |
| 411 |
case VT_PAR: /* parallel view */ |
| 412 |
case VT_ANG: /* angular fisheye */ |
| 413 |
vp->horiz /= zf; |
| 414 |
vp->vert /= zf; |
| 415 |
return; |
| 416 |
case VT_PER: /* perspective view */ |
| 417 |
vp->horiz = atan(tan(vp->horiz*(PI/180./2.))/zf) / |
| 418 |
(PI/180./2.); |
| 419 |
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / |
| 420 |
(PI/180./2.); |
| 421 |
return; |
| 422 |
case VT_HEM: /* hemispherical fisheye */ |
| 423 |
vp->horiz = sin(vp->horiz*(PI/180./2.))/zf; |
| 424 |
if (vp->horiz >= 1.0-FTINY) |
| 425 |
vp->horiz = 180.; |
| 426 |
else |
| 427 |
vp->horiz = asin(vp->horiz) / (PI/180./2.); |
| 428 |
vp->vert = sin(vp->vert*(PI/180./2.))/zf; |
| 429 |
if (vp->vert >= 1.0-FTINY) |
| 430 |
vp->vert = 180.; |
| 431 |
else |
| 432 |
vp->vert = asin(vp->vert) / (PI/180./2.); |
| 433 |
return; |
| 434 |
} |
| 435 |
} |
| 436 |
|
| 437 |
|
| 438 |
spinvector(vres, vorig, vnorm, theta) /* rotate vector around normal */ |
| 439 |
FVECT vres, vorig, vnorm; |
| 440 |
double theta; |
| 441 |
{ |
| 442 |
extern double sin(), cos(); |
| 443 |
double sint, cost, dotp; |
| 444 |
FVECT vperp; |
| 445 |
register int i; |
| 446 |
|
| 447 |
if (theta == 0.0) { |
| 448 |
VCOPY(vres, vorig); |
| 449 |
return; |
| 450 |
} |
| 451 |
sint = sin(theta); |
| 452 |
cost = cos(theta); |
| 453 |
dotp = DOT(vorig, vnorm); |
| 454 |
fcross(vperp, vnorm, vorig); |
| 455 |
for (i = 0; i < 3; i++) |
| 456 |
vres[i] = vnorm[i]*dotp*(1.-cost) + |
| 457 |
vorig[i]*cost + vperp[i]*sint; |
| 458 |
} |
