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greg |
1.1 |
/* Copyright (c) 1987 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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#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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*/ |
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#include "ray.h" |
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greg |
1.7 |
#include "octree.h" |
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greg |
1.1 |
#include "rpaint.h" |
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#include "random.h" |
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greg |
1.7 |
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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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if (*s && !strncmp(s, "all", strlen(s))) { |
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r->l = r->d = 0; |
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r->r = ourview.hresolu; |
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r->u = ourview.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 > ourview.hresolu) r->r = ourview.hresolu; |
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if (r->u > ourview.vresolu) r->u = ourview.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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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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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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rayview(thisray.rorg, thisray.rdir, &ourview, x+.5, y+.5); |
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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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greg |
1.1 |
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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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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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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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static RAY thisray; |
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double h, v; |
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register int i; |
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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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p->x = h = xmin + (xmax-xmin)*frandom(); |
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p->y = v = ymin + (ymax-ymin)*frandom(); |
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rayview(thisray.rorg, thisray.rdir, &ourview, h, v); |
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rayorigin(&thisray, NULL, PRIMARY, 1.0); |
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rayvalue(&thisray); |
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copycolor(p->v, thisray.rcol); |
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scalecolor(p->v, exposure); |
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(*dev->paintr)(greyscale?greyof(p->v):p->v, xmin, ymin, xmax, ymax); |
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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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/* set up frame */ |
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if (ourview.hresolu > dev->xsiz || ourview.vresolu > dev->ysiz) |
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greg |
1.6 |
newview(&ourview); /* beware recursive loop! */ |
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greg |
1.1 |
pframe.l = pframe.d = 0; |
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pframe.r = ourview.hresolu; pframe.u = ourview.vresolu; |
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pdepth = 0; |
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/* clear device */ |
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(*dev->clear)(ourview.hresolu, ourview.vresolu); |
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/* get first value */ |
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paint(&ptrunk, 0, 0, ourview.hresolu, ourview.vresolu); |
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} |
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redraw() /* redraw the image */ |
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{ |
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(*dev->clear)(ourview.hresolu, ourview.vresolu); |
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(*dev->comout)("redrawing...\n"); |
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repaint(0, 0, ourview.hresolu, ourview.vresolu); |
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(*dev->comout)("\n"); |
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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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reg.l = xmin; reg.r = xmax; |
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reg.d = ymin; reg.u = ymax; |
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paintrect(&ptrunk, 0, 0, ourview.hresolu, ourview.vresolu, ®); |
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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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if (dev->inpready) |
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return; /* break for input */ |
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if (xmax - xmin <= 0 || ymax - ymin <= 0) |
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return; |
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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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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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while (p->kid != NULL && pd--) { |
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mx = (r->l + r->r) >> 1; |
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my = (r->d + r->u) >> 1; |
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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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} |
| 256 |
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} else { |
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r->l = mx; |
| 258 |
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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; |
| 264 |
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} |
| 265 |
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} |
| 266 |
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} |
| 267 |
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return(p); |
| 268 |
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} |
| 269 |
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scalepict(p, sf) /* scale picture values */ |
| 272 |
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register PNODE *p; |
| 273 |
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double sf; |
| 274 |
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{ |
| 275 |
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scalecolor(p->v, sf); /* do this node */ |
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| 277 |
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if (p->kid == NULL) |
| 278 |
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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); |
| 282 |
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scalepict(p->kid+UL, sf); |
| 283 |
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scalepict(p->kid+UR, sf); |
| 284 |
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} |
| 285 |
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| 286 |
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| 287 |
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getpictcolrs(yoff, scan, p, xsiz, ysiz) /* get scanline from picture */ |
| 288 |
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int yoff; |
| 289 |
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register COLR *scan; |
| 290 |
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register PNODE *p; |
| 291 |
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int xsiz, ysiz; |
| 292 |
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{ |
| 293 |
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register int mx; |
| 294 |
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int my; |
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| 296 |
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if (p->kid == NULL) { /* do this node */ |
| 297 |
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setcolr(scan[0], colval(p->v,RED), |
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colval(p->v,GRN), |
| 299 |
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colval(p->v,BLU)); |
| 300 |
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for (mx = 1; mx < xsiz; mx++) |
| 301 |
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copycolr(scan[mx], scan[0]); |
| 302 |
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return; |
| 303 |
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} |
| 304 |
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/* do kids */ |
| 305 |
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mx = xsiz >> 1; |
| 306 |
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my = ysiz >> 1; |
| 307 |
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if (yoff < my) { |
| 308 |
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getpictcolrs(yoff, scan, p->kid+DL, mx, my); |
| 309 |
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getpictcolrs(yoff, scan+mx, p->kid+DR, xsiz-mx, my); |
| 310 |
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} else { |
| 311 |
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getpictcolrs(yoff-my, scan, p->kid+UL, mx, ysiz-my); |
| 312 |
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getpictcolrs(yoff-my, scan+mx, p->kid+UR, xsiz-mx, ysiz-my); |
| 313 |
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} |
| 314 |
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} |
| 315 |
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| 316 |
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| 317 |
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pcopy(p1, p2) /* copy paint node p1 into p2 */ |
| 318 |
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register PNODE *p1, *p2; |
| 319 |
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{ |
| 320 |
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copycolor(p2->v, p1->v); |
| 321 |
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p2->x = p1->x; |
| 322 |
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p2->y = p1->y; |
| 323 |
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} |
| 324 |
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| 325 |
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| 326 |
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freepkids(p) /* free pnode's children */ |
| 327 |
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register PNODE *p; |
| 328 |
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{ |
| 329 |
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if (p->kid == NULL) |
| 330 |
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return; |
| 331 |
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freepkids(p->kid+DL); |
| 332 |
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freepkids(p->kid+DR); |
| 333 |
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freepkids(p->kid+UL); |
| 334 |
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freepkids(p->kid+UR); |
| 335 |
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free((char *)p->kid); |
| 336 |
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p->kid = NULL; |
| 337 |
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} |
| 338 |
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| 339 |
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| 340 |
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newview(vp) /* change viewing parameters */ |
| 341 |
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register VIEW *vp; |
| 342 |
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{ |
| 343 |
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char *err; |
| 344 |
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| 345 |
greg |
1.6 |
if (vp->hresolu > dev->xsiz || vp->vresolu > dev->ysiz) /* shrink */ |
| 346 |
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if (vp->vresolu * dev->xsiz < vp->hresolu * dev->ysiz) { |
| 347 |
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vp->vresolu = dev->xsiz * vp->vresolu / vp->hresolu; |
| 348 |
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vp->hresolu = dev->xsiz; |
| 349 |
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} else { |
| 350 |
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vp->hresolu = dev->ysiz * vp->hresolu / vp->vresolu; |
| 351 |
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vp->vresolu = dev->ysiz; |
| 352 |
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} |
| 353 |
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if ((err = setview(vp)) != NULL) { |
| 354 |
greg |
1.1 |
sprintf(errmsg, "view not set - %s", err); |
| 355 |
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error(COMMAND, errmsg); |
| 356 |
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} else if (bcmp(vp, &ourview, sizeof(VIEW))) { |
| 357 |
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bcopy(&ourview, &oldview, sizeof(VIEW)); |
| 358 |
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bcopy(vp, &ourview, sizeof(VIEW)); |
| 359 |
greg |
1.6 |
newimage(); /* newimage() calls with vp=&ourview! */ |
| 360 |
greg |
1.1 |
} |
| 361 |
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} |
| 362 |
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| 363 |
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| 364 |
greg |
1.4 |
moveview(angle, elev, mag, vc) /* move viewpoint */ |
| 365 |
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double angle, elev, mag; |
| 366 |
greg |
1.1 |
FVECT vc; |
| 367 |
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{ |
| 368 |
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extern double sqrt(), dist2(); |
| 369 |
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double d; |
| 370 |
greg |
1.4 |
FVECT v1; |
| 371 |
greg |
1.1 |
VIEW nv; |
| 372 |
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register int i; |
| 373 |
|
|
|
| 374 |
|
|
VCOPY(nv.vup, ourview.vup); |
| 375 |
|
|
nv.hresolu = ourview.hresolu; nv.vresolu = ourview.vresolu; |
| 376 |
|
|
spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.)); |
| 377 |
greg |
1.4 |
if (elev != 0.0) { |
| 378 |
greg |
1.5 |
fcross(v1, ourview.vup, nv.vdir); |
| 379 |
greg |
1.4 |
normalize(v1); |
| 380 |
|
|
spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.)); |
| 381 |
|
|
} |
| 382 |
greg |
1.1 |
if ((nv.type = ourview.type) == VT_PAR) { |
| 383 |
|
|
nv.horiz = ourview.horiz / mag; |
| 384 |
|
|
nv.vert = ourview.vert / mag; |
| 385 |
greg |
1.3 |
d = 0.0; /* don't move closer */ |
| 386 |
greg |
1.2 |
for (i = 0; i < 3; i++) |
| 387 |
greg |
1.3 |
d += (vc[i] - ourview.vp[i])*ourview.vdir[i]; |
| 388 |
greg |
1.1 |
} else { |
| 389 |
|
|
nv.horiz = ourview.horiz; |
| 390 |
|
|
nv.vert = ourview.vert; |
| 391 |
greg |
1.2 |
d = sqrt(dist2(ourview.vp, vc)) / mag; |
| 392 |
greg |
1.1 |
} |
| 393 |
greg |
1.2 |
for (i = 0; i < 3; i++) |
| 394 |
|
|
nv.vp[i] = vc[i] - d*nv.vdir[i]; |
| 395 |
greg |
1.1 |
newview(&nv); |
| 396 |
|
|
} |
| 397 |
|
|
|
| 398 |
|
|
|
| 399 |
|
|
spinvector(vres, vorig, vnorm, theta) /* rotate vector around normal */ |
| 400 |
|
|
FVECT vres, vorig, vnorm; |
| 401 |
|
|
double theta; |
| 402 |
|
|
{ |
| 403 |
|
|
extern double sin(), cos(); |
| 404 |
|
|
double sint, cost, dotp; |
| 405 |
|
|
FVECT vperp; |
| 406 |
|
|
register int i; |
| 407 |
|
|
|
| 408 |
|
|
if (theta == 0.0) { |
| 409 |
|
|
VCOPY(vres, vorig); |
| 410 |
|
|
return; |
| 411 |
|
|
} |
| 412 |
|
|
sint = sin(theta); |
| 413 |
|
|
cost = cos(theta); |
| 414 |
|
|
dotp = DOT(vorig, vnorm); |
| 415 |
|
|
fcross(vperp, vnorm, vorig); |
| 416 |
|
|
for (i = 0; i < 3; i++) |
| 417 |
|
|
vres[i] = vnorm[i]*dotp*(1.-cost) + |
| 418 |
|
|
vorig[i]*cost + vperp[i]*sint; |
| 419 |
|
|
} |
