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#ifndef lint
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static const char RCSid[] = "$Id: rv3.c,v 2.12 2003/06/30 14:59:13 schorsch Exp $";
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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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* External symbols declared in rpaint.h
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*/
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#include "copyright.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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#ifdef SPEED
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#define WFLUSH (5*SPEED)
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#else
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#define WFLUSH 100 /* flush after this many rays */
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#endif
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#endif
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#ifdef SMLFLT
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#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3)
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#else
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#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3)
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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 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 = 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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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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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 (!sscanvec(sskip(s), vec)) {
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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 ((thisray.rmax = viewray(thisray.rorg, thisray.rdir,
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&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) {
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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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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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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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static unsigned long lastflush = 0;
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static RAY thisray;
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double h, v;
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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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if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, &ourview,
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h/hresolu, v/vresolu)) < -FTINY) {
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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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samplendx++;
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rayvalue(&thisray);
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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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(*dev->paintr)(greyscale?greyof(p->v):p->v, xmin, ymin, xmax, ymax);
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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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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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freepkids(&ptrunk);
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/* save reserve memory */
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fillreserves();
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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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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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(*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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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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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, hresolu, vresolu, ®);
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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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register RECT *r;
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{
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int mx, my;
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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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| 271 |
int mx, my;
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while (p->kid != NULL && pd--) {
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| 275 |
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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}
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} else {
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r->l = mx;
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if (y < my) {
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| 290 |
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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| 294 |
p = p->kid+UR;
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}
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| 296 |
}
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| 297 |
}
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| 298 |
return(p);
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| 299 |
}
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| 300 |
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| 301 |
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| 302 |
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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| 307 |
scalecolor(p->v, sf); /* do this node */
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| 308 |
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| 309 |
if (p->kid == NULL)
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| 310 |
return;
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/* do children */
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| 312 |
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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| 317 |
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| 318 |
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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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| 322 |
register COLR *scan;
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| 323 |
register PNODE *p;
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| 324 |
int xsiz, ysiz;
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| 325 |
{
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| 326 |
register int mx;
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| 327 |
int my;
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| 328 |
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| 329 |
if (p->kid == NULL) { /* do this node */
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| 330 |
setcolr(scan[0], colval(p->v,RED),
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| 331 |
colval(p->v,GRN),
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| 332 |
colval(p->v,BLU));
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| 333 |
for (mx = 1; mx < xsiz; mx++)
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| 334 |
copycolr(scan[mx], scan[0]);
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| 335 |
return;
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| 336 |
}
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| 337 |
/* do kids */
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| 338 |
mx = xsiz >> 1;
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| 339 |
my = ysiz >> 1;
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| 340 |
if (yoff < my) {
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| 341 |
getpictcolrs(yoff, scan, p->kid+DL, mx, my);
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| 342 |
getpictcolrs(yoff, scan+mx, p->kid+DR, xsiz-mx, my);
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| 343 |
} else {
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| 344 |
getpictcolrs(yoff-my, scan, p->kid+UL, mx, ysiz-my);
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| 345 |
getpictcolrs(yoff-my, scan+mx, p->kid+UR, xsiz-mx, ysiz-my);
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| 346 |
}
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| 347 |
}
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| 348 |
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| 349 |
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| 350 |
void
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| 351 |
freepkids(p) /* free pnode's children */
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| 352 |
register PNODE *p;
|
| 353 |
{
|
| 354 |
if (p->kid == NULL)
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| 355 |
return;
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| 356 |
freepkids(p->kid+DL);
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| 357 |
freepkids(p->kid+DR);
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| 358 |
freepkids(p->kid+UL);
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| 359 |
freepkids(p->kid+UR);
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| 360 |
free((void *)p->kid);
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| 361 |
p->kid = NULL;
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| 362 |
}
|
| 363 |
|
| 364 |
|
| 365 |
void
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| 366 |
newview(vp) /* change viewing parameters */
|
| 367 |
register VIEW *vp;
|
| 368 |
{
|
| 369 |
char *err;
|
| 370 |
|
| 371 |
if ((err = setview(vp)) != NULL) {
|
| 372 |
sprintf(errmsg, "view not set - %s", err);
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| 373 |
error(COMMAND, errmsg);
|
| 374 |
} else if (memcmp((char *)vp, (char *)&ourview, sizeof(VIEW))) {
|
| 375 |
oldview = ourview;
|
| 376 |
ourview = *vp;
|
| 377 |
newimage();
|
| 378 |
}
|
| 379 |
}
|
| 380 |
|
| 381 |
|
| 382 |
void
|
| 383 |
moveview(angle, elev, mag, vc) /* move viewpoint */
|
| 384 |
double angle, elev, mag;
|
| 385 |
FVECT vc;
|
| 386 |
{
|
| 387 |
double d;
|
| 388 |
FVECT v1;
|
| 389 |
VIEW nv;
|
| 390 |
register int i;
|
| 391 |
|
| 392 |
VCOPY(nv.vup, ourview.vup);
|
| 393 |
nv.hoff = ourview.hoff; nv.voff = ourview.voff;
|
| 394 |
spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.));
|
| 395 |
if (elev != 0.0) {
|
| 396 |
fcross(v1, ourview.vup, nv.vdir);
|
| 397 |
normalize(v1);
|
| 398 |
spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.));
|
| 399 |
}
|
| 400 |
if ((nv.type = ourview.type) == VT_PAR) {
|
| 401 |
nv.horiz = ourview.horiz / mag;
|
| 402 |
nv.vert = ourview.vert / mag;
|
| 403 |
d = 0.0; /* don't move closer */
|
| 404 |
for (i = 0; i < 3; i++)
|
| 405 |
d += (vc[i] - ourview.vp[i])*ourview.vdir[i];
|
| 406 |
nv.vfore = ourview.vfore;
|
| 407 |
nv.vaft = ourview.vaft;
|
| 408 |
} else {
|
| 409 |
nv.horiz = ourview.horiz;
|
| 410 |
nv.vert = ourview.vert;
|
| 411 |
d = sqrt(dist2(ourview.vp, vc)) / mag;
|
| 412 |
if ((nv.vfore = ourview.vfore) > FTINY) {
|
| 413 |
nv.vfore += d - d*mag;
|
| 414 |
if (nv.vfore < 0.0) nv.vfore = 0.0;
|
| 415 |
}
|
| 416 |
if ((nv.vaft = ourview.vaft) > FTINY) {
|
| 417 |
nv.vaft += d - d*mag;
|
| 418 |
if (nv.vaft <= nv.vfore) nv.vaft = 0.0;
|
| 419 |
}
|
| 420 |
}
|
| 421 |
for (i = 0; i < 3; i++)
|
| 422 |
nv.vp[i] = vc[i] - d*nv.vdir[i];
|
| 423 |
newview(&nv);
|
| 424 |
}
|
| 425 |
|
| 426 |
|
| 427 |
void
|
| 428 |
pcopy(p1, p2) /* copy paint node p1 into p2 */
|
| 429 |
register PNODE *p1, *p2;
|
| 430 |
{
|
| 431 |
copycolor(p2->v, p1->v);
|
| 432 |
p2->x = p1->x;
|
| 433 |
p2->y = p1->y;
|
| 434 |
}
|
| 435 |
|
| 436 |
|
| 437 |
void
|
| 438 |
zoomview(vp, zf) /* zoom in or out */
|
| 439 |
register VIEW *vp;
|
| 440 |
double zf;
|
| 441 |
{
|
| 442 |
switch (vp->type) {
|
| 443 |
case VT_PAR: /* parallel view */
|
| 444 |
vp->horiz /= zf;
|
| 445 |
vp->vert /= zf;
|
| 446 |
return;
|
| 447 |
case VT_ANG: /* angular fisheye */
|
| 448 |
vp->horiz /= zf;
|
| 449 |
if (vp->horiz > 360.)
|
| 450 |
vp->horiz = 360.;
|
| 451 |
vp->vert /= zf;
|
| 452 |
if (vp->vert > 360.)
|
| 453 |
vp->vert = 360.;
|
| 454 |
return;
|
| 455 |
case VT_CYL: /* cylindrical panorama */
|
| 456 |
vp->horiz /= zf;
|
| 457 |
if (vp->horiz > 360.)
|
| 458 |
vp->horiz = 360.;
|
| 459 |
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / (PI/180./2.);
|
| 460 |
return;
|
| 461 |
case VT_PER: /* perspective view */
|
| 462 |
vp->horiz = atan(tan(vp->horiz*(PI/180./2.))/zf) /
|
| 463 |
(PI/180./2.);
|
| 464 |
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) /
|
| 465 |
(PI/180./2.);
|
| 466 |
return;
|
| 467 |
case VT_HEM: /* hemispherical fisheye */
|
| 468 |
vp->horiz = sin(vp->horiz*(PI/180./2.))/zf;
|
| 469 |
if (vp->horiz >= 1.0-FTINY)
|
| 470 |
vp->horiz = 180.;
|
| 471 |
else
|
| 472 |
vp->horiz = asin(vp->horiz) / (PI/180./2.);
|
| 473 |
vp->vert = sin(vp->vert*(PI/180./2.))/zf;
|
| 474 |
if (vp->vert >= 1.0-FTINY)
|
| 475 |
vp->vert = 180.;
|
| 476 |
else
|
| 477 |
vp->vert = asin(vp->vert) / (PI/180./2.);
|
| 478 |
return;
|
| 479 |
}
|
| 480 |
}
|
