| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: rv3.c,v 2.19 2005/09/19 02:23:58 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* rv3.c - miscellaneous routines for rview. |
| 6 |
* |
| 7 |
* External symbols declared in rpaint.h |
| 8 |
*/ |
| 9 |
|
| 10 |
#include "copyright.h" |
| 11 |
|
| 12 |
#include <string.h> |
| 13 |
|
| 14 |
#include "ray.h" |
| 15 |
#include "rpaint.h" |
| 16 |
#include "random.h" |
| 17 |
|
| 18 |
#ifndef WFLUSH |
| 19 |
#define WFLUSH 2048 /* flush after this many rays */ |
| 20 |
#endif |
| 21 |
|
| 22 |
#ifdef SMLFLT |
| 23 |
#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3) |
| 24 |
#else |
| 25 |
#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3) |
| 26 |
#endif |
| 27 |
|
| 28 |
|
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int |
| 30 |
getrect(s, r) /* get a box */ |
| 31 |
char *s; |
| 32 |
register RECT *r; |
| 33 |
{ |
| 34 |
int x0, y0, x1, y1; |
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|
| 36 |
if (*s && !strncmp(s, "all", strlen(s))) { |
| 37 |
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); |
| 41 |
} |
| 42 |
if (sscanf(s, "%d %d %d %d", &x0, &y0, &x1, &y1) != 4) { |
| 43 |
if (dev->getcur == NULL) |
| 44 |
return(-1); |
| 45 |
(*dev->comout)("Pick first corner\n"); |
| 46 |
if ((*dev->getcur)(&x0, &y0) == ABORT) |
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return(-1); |
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(*dev->comout)("Pick second corner\n"); |
| 49 |
if ((*dev->getcur)(&x1, &y1) == ABORT) |
| 50 |
return(-1); |
| 51 |
} |
| 52 |
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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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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|
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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; |
| 91 |
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); |
| 101 |
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, PRIMARY, NULL, NULL); |
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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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if (normalize(vec) == 0.0) { |
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error(COMMAND, "point at view origin"); |
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return(-1); |
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} |
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} |
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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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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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|
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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 ((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, PRIMARY, NULL, NULL); |
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samplendx++; |
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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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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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|
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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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|
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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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|
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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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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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|
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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 */ |
| 267 |
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; |
| 278 |
|
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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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} |
| 297 |
} |
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} |
| 299 |
return(p); |
| 300 |
} |
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|
| 302 |
|
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void |
| 304 |
scalepict(p, sf) /* scale picture values */ |
| 305 |
register PNODE *p; |
| 306 |
double sf; |
| 307 |
{ |
| 308 |
scalecolor(p->v, sf); /* do this node */ |
| 309 |
|
| 310 |
if (p->kid == NULL) |
| 311 |
return; |
| 312 |
/* do children */ |
| 313 |
scalepict(p->kid+DL, sf); |
| 314 |
scalepict(p->kid+DR, sf); |
| 315 |
scalepict(p->kid+UL, sf); |
| 316 |
scalepict(p->kid+UR, sf); |
| 317 |
} |
| 318 |
|
| 319 |
|
| 320 |
void |
| 321 |
getpictcolrs(yoff, scan, p, xsiz, ysiz) /* get scanline from picture */ |
| 322 |
int yoff; |
| 323 |
register COLR *scan; |
| 324 |
register PNODE *p; |
| 325 |
int xsiz, ysiz; |
| 326 |
{ |
| 327 |
register int mx; |
| 328 |
int my; |
| 329 |
|
| 330 |
if (p->kid == NULL) { /* do this node */ |
| 331 |
setcolr(scan[0], colval(p->v,RED), |
| 332 |
colval(p->v,GRN), |
| 333 |
colval(p->v,BLU)); |
| 334 |
for (mx = 1; mx < xsiz; mx++) |
| 335 |
copycolr(scan[mx], scan[0]); |
| 336 |
return; |
| 337 |
} |
| 338 |
/* do kids */ |
| 339 |
mx = xsiz >> 1; |
| 340 |
my = ysiz >> 1; |
| 341 |
if (yoff < my) { |
| 342 |
getpictcolrs(yoff, scan, p->kid+DL, mx, my); |
| 343 |
getpictcolrs(yoff, scan+mx, p->kid+DR, xsiz-mx, my); |
| 344 |
} else { |
| 345 |
getpictcolrs(yoff-my, scan, p->kid+UL, mx, ysiz-my); |
| 346 |
getpictcolrs(yoff-my, scan+mx, p->kid+UR, xsiz-mx, ysiz-my); |
| 347 |
} |
| 348 |
} |
| 349 |
|
| 350 |
|
| 351 |
void |
| 352 |
freepkids(p) /* free pnode's children */ |
| 353 |
register PNODE *p; |
| 354 |
{ |
| 355 |
if (p->kid == NULL) |
| 356 |
return; |
| 357 |
freepkids(p->kid+DL); |
| 358 |
freepkids(p->kid+DR); |
| 359 |
freepkids(p->kid+UL); |
| 360 |
freepkids(p->kid+UR); |
| 361 |
free((void *)p->kid); |
| 362 |
p->kid = NULL; |
| 363 |
} |
| 364 |
|
| 365 |
|
| 366 |
void |
| 367 |
newview(vp) /* change viewing parameters */ |
| 368 |
register VIEW *vp; |
| 369 |
{ |
| 370 |
char *err; |
| 371 |
|
| 372 |
if ((err = setview(vp)) != NULL) { |
| 373 |
sprintf(errmsg, "view not set - %s", err); |
| 374 |
error(COMMAND, errmsg); |
| 375 |
} else if (memcmp((char *)vp, (char *)&ourview, sizeof(VIEW))) { |
| 376 |
oldview = ourview; |
| 377 |
ourview = *vp; |
| 378 |
newimage(); |
| 379 |
} |
| 380 |
} |
| 381 |
|
| 382 |
|
| 383 |
void |
| 384 |
moveview(angle, elev, mag, vc) /* move viewpoint */ |
| 385 |
double angle, elev, mag; |
| 386 |
FVECT vc; |
| 387 |
{ |
| 388 |
double d; |
| 389 |
FVECT v1; |
| 390 |
VIEW nv = ourview; |
| 391 |
register int i; |
| 392 |
|
| 393 |
spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.)); |
| 394 |
if (elev != 0.0) { |
| 395 |
fcross(v1, ourview.vup, nv.vdir); |
| 396 |
normalize(v1); |
| 397 |
spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.)); |
| 398 |
} |
| 399 |
if (nv.type == VT_PAR) { |
| 400 |
nv.horiz /= mag; |
| 401 |
nv.vert /= mag; |
| 402 |
d = 0.0; /* don't move closer */ |
| 403 |
for (i = 0; i < 3; i++) |
| 404 |
d += (vc[i] - ourview.vp[i])*ourview.vdir[i]; |
| 405 |
} else { |
| 406 |
d = sqrt(dist2(ourview.vp, vc)) / mag; |
| 407 |
if (nv.vfore > FTINY) { |
| 408 |
nv.vfore += d - d*mag; |
| 409 |
if (nv.vfore < 0.0) nv.vfore = 0.0; |
| 410 |
} |
| 411 |
if (nv.vaft > FTINY) { |
| 412 |
nv.vaft += d - d*mag; |
| 413 |
if (nv.vaft <= nv.vfore) nv.vaft = 0.0; |
| 414 |
} |
| 415 |
nv.vdist /= mag; |
| 416 |
} |
| 417 |
for (i = 0; i < 3; i++) |
| 418 |
nv.vp[i] = vc[i] - d*nv.vdir[i]; |
| 419 |
newview(&nv); |
| 420 |
} |
| 421 |
|
| 422 |
|
| 423 |
void |
| 424 |
pcopy(p1, p2) /* copy paint node p1 into p2 */ |
| 425 |
register PNODE *p1, *p2; |
| 426 |
{ |
| 427 |
copycolor(p2->v, p1->v); |
| 428 |
p2->x = p1->x; |
| 429 |
p2->y = p1->y; |
| 430 |
} |
| 431 |
|
| 432 |
|
| 433 |
void |
| 434 |
zoomview(vp, zf) /* zoom in or out */ |
| 435 |
register VIEW *vp; |
| 436 |
double zf; |
| 437 |
{ |
| 438 |
switch (vp->type) { |
| 439 |
case VT_PAR: /* parallel view */ |
| 440 |
vp->horiz /= zf; |
| 441 |
vp->vert /= zf; |
| 442 |
return; |
| 443 |
case VT_ANG: /* angular fisheye */ |
| 444 |
vp->horiz /= zf; |
| 445 |
if (vp->horiz > 360.) |
| 446 |
vp->horiz = 360.; |
| 447 |
vp->vert /= zf; |
| 448 |
if (vp->vert > 360.) |
| 449 |
vp->vert = 360.; |
| 450 |
return; |
| 451 |
case VT_CYL: /* cylindrical panorama */ |
| 452 |
vp->horiz /= zf; |
| 453 |
if (vp->horiz > 360.) |
| 454 |
vp->horiz = 360.; |
| 455 |
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / (PI/180./2.); |
| 456 |
return; |
| 457 |
case VT_PER: /* perspective view */ |
| 458 |
vp->horiz = atan(tan(vp->horiz*(PI/180./2.))/zf) / |
| 459 |
(PI/180./2.); |
| 460 |
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / |
| 461 |
(PI/180./2.); |
| 462 |
return; |
| 463 |
case VT_HEM: /* hemispherical fisheye */ |
| 464 |
vp->horiz = sin(vp->horiz*(PI/180./2.))/zf; |
| 465 |
if (vp->horiz >= 1.0-FTINY) |
| 466 |
vp->horiz = 180.; |
| 467 |
else |
| 468 |
vp->horiz = asin(vp->horiz) / (PI/180./2.); |
| 469 |
vp->vert = sin(vp->vert*(PI/180./2.))/zf; |
| 470 |
if (vp->vert >= 1.0-FTINY) |
| 471 |
vp->vert = 180.; |
| 472 |
else |
| 473 |
vp->vert = asin(vp->vert) / (PI/180./2.); |
| 474 |
return; |
| 475 |
} |
| 476 |
} |
