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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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greg |
1.13 |
#ifndef WFLUSH |
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#define WFLUSH 30 /* flush after this many rays */ |
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#endif |
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greg |
1.7 |
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greg |
1.13 |
|
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greg |
1.7 |
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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greg |
1.9 |
r->r = hresolu; |
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r->u = vresolu; |
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greg |
1.7 |
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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greg |
1.9 |
if (r->r > hresolu) r->r = hresolu; |
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if (r->u > vresolu) r->u = vresolu; |
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greg |
1.7 |
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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greg |
1.17 |
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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greg |
1.7 |
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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greg |
1.13 |
extern long nrays; |
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static long lastflush = 0; |
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greg |
1.1 |
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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greg |
1.15 |
h = xmin + (xmax-xmin)*frandom(); |
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v = ymin + (ymax-ymin)*frandom(); |
154 |
greg |
1.1 |
|
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greg |
1.17 |
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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greg |
1.20 |
samplendx++; |
161 |
greg |
1.17 |
rayvalue(&thisray); |
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} |
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greg |
1.1 |
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164 |
greg |
1.15 |
p->x = h; |
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p->y = v; |
166 |
greg |
1.1 |
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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greg |
1.13 |
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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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greg |
1.1 |
} |
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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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greg |
1.19 |
/* save reserve memory */ |
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fillreserves(); |
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greg |
1.9 |
/* compute resolution */ |
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greg |
1.10 |
hresolu = dev->xsiz; |
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vresolu = dev->ysiz; |
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greg |
1.11 |
normaspect(viewaspect(&ourview), &dev->pixaspect, &hresolu, &vresolu); |
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greg |
1.1 |
pframe.l = pframe.d = 0; |
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greg |
1.9 |
pframe.r = hresolu; pframe.u = vresolu; |
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greg |
1.1 |
pdepth = 0; |
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/* clear device */ |
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greg |
1.9 |
(*dev->clear)(hresolu, vresolu); |
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greg |
1.1 |
/* get first value */ |
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greg |
1.9 |
paint(&ptrunk, 0, 0, hresolu, vresolu); |
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greg |
1.1 |
} |
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redraw() /* redraw the image */ |
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{ |
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greg |
1.9 |
(*dev->clear)(hresolu, vresolu); |
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greg |
1.1 |
(*dev->comout)("redrawing...\n"); |
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greg |
1.9 |
repaint(0, 0, hresolu, vresolu); |
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greg |
1.1 |
(*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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215 |
greg |
1.9 |
paintrect(&ptrunk, 0, 0, hresolu, vresolu, ®); |
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greg |
1.1 |
} |
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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; |
256 |
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int pd; |
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{ |
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int mx, my; |
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260 |
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while (p->kid != NULL && pd--) { |
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262 |
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mx = (r->l + r->r) >> 1; |
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my = (r->d + r->u) >> 1; |
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265 |
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if (x < mx) { |
266 |
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r->r = mx; |
267 |
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if (y < my) { |
268 |
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r->u = my; |
269 |
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p = p->kid+DL; |
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} else { |
271 |
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r->d = my; |
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p = p->kid+UL; |
273 |
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} |
274 |
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} else { |
275 |
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r->l = mx; |
276 |
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if (y < my) { |
277 |
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r->u = my; |
278 |
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p = p->kid+DR; |
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} else { |
280 |
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r->d = my; |
281 |
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p = p->kid+UR; |
282 |
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} |
283 |
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} |
284 |
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} |
285 |
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return(p); |
286 |
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} |
287 |
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288 |
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289 |
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scalepict(p, sf) /* scale picture values */ |
290 |
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register PNODE *p; |
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double sf; |
292 |
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{ |
293 |
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scalecolor(p->v, sf); /* do this node */ |
294 |
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295 |
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if (p->kid == NULL) |
296 |
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return; |
297 |
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/* do children */ |
298 |
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scalepict(p->kid+DL, sf); |
299 |
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scalepict(p->kid+DR, sf); |
300 |
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scalepict(p->kid+UL, sf); |
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scalepict(p->kid+UR, sf); |
302 |
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} |
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304 |
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305 |
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getpictcolrs(yoff, scan, p, xsiz, ysiz) /* get scanline from picture */ |
306 |
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int yoff; |
307 |
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register COLR *scan; |
308 |
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register PNODE *p; |
309 |
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int xsiz, ysiz; |
310 |
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{ |
311 |
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register int mx; |
312 |
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int my; |
313 |
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314 |
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if (p->kid == NULL) { /* do this node */ |
315 |
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setcolr(scan[0], colval(p->v,RED), |
316 |
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colval(p->v,GRN), |
317 |
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colval(p->v,BLU)); |
318 |
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for (mx = 1; mx < xsiz; mx++) |
319 |
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copycolr(scan[mx], scan[0]); |
320 |
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return; |
321 |
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} |
322 |
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/* do kids */ |
323 |
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mx = xsiz >> 1; |
324 |
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my = ysiz >> 1; |
325 |
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if (yoff < my) { |
326 |
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getpictcolrs(yoff, scan, p->kid+DL, mx, my); |
327 |
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getpictcolrs(yoff, scan+mx, p->kid+DR, xsiz-mx, my); |
328 |
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} else { |
329 |
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getpictcolrs(yoff-my, scan, p->kid+UL, mx, ysiz-my); |
330 |
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getpictcolrs(yoff-my, scan+mx, p->kid+UR, xsiz-mx, ysiz-my); |
331 |
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} |
332 |
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} |
333 |
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334 |
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335 |
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pcopy(p1, p2) /* copy paint node p1 into p2 */ |
336 |
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register PNODE *p1, *p2; |
337 |
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{ |
338 |
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copycolor(p2->v, p1->v); |
339 |
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p2->x = p1->x; |
340 |
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p2->y = p1->y; |
341 |
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} |
342 |
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343 |
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344 |
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freepkids(p) /* free pnode's children */ |
345 |
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register PNODE *p; |
346 |
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{ |
347 |
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if (p->kid == NULL) |
348 |
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return; |
349 |
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freepkids(p->kid+DL); |
350 |
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freepkids(p->kid+DR); |
351 |
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freepkids(p->kid+UL); |
352 |
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freepkids(p->kid+UR); |
353 |
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free((char *)p->kid); |
354 |
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p->kid = NULL; |
355 |
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} |
356 |
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357 |
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358 |
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newview(vp) /* change viewing parameters */ |
359 |
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register VIEW *vp; |
360 |
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{ |
361 |
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char *err; |
362 |
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|
363 |
greg |
1.6 |
if ((err = setview(vp)) != NULL) { |
364 |
greg |
1.1 |
sprintf(errmsg, "view not set - %s", err); |
365 |
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error(COMMAND, errmsg); |
366 |
greg |
1.12 |
} else if (bcmp((char *)vp, (char *)&ourview, sizeof(VIEW))) { |
367 |
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copystruct(&oldview, &ourview); |
368 |
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copystruct(&ourview, vp); |
369 |
greg |
1.14 |
newimage(); |
370 |
greg |
1.1 |
} |
371 |
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} |
372 |
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373 |
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|
374 |
greg |
1.4 |
moveview(angle, elev, mag, vc) /* move viewpoint */ |
375 |
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double angle, elev, mag; |
376 |
greg |
1.1 |
FVECT vc; |
377 |
|
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{ |
378 |
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extern double sqrt(), dist2(); |
379 |
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double d; |
380 |
greg |
1.4 |
FVECT v1; |
381 |
greg |
1.1 |
VIEW nv; |
382 |
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register int i; |
383 |
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|
384 |
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VCOPY(nv.vup, ourview.vup); |
385 |
greg |
1.9 |
nv.hoff = ourview.hoff; nv.voff = ourview.voff; |
386 |
greg |
1.1 |
spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.)); |
387 |
greg |
1.4 |
if (elev != 0.0) { |
388 |
greg |
1.5 |
fcross(v1, ourview.vup, nv.vdir); |
389 |
greg |
1.4 |
normalize(v1); |
390 |
|
|
spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.)); |
391 |
|
|
} |
392 |
greg |
1.1 |
if ((nv.type = ourview.type) == VT_PAR) { |
393 |
|
|
nv.horiz = ourview.horiz / mag; |
394 |
|
|
nv.vert = ourview.vert / mag; |
395 |
greg |
1.3 |
d = 0.0; /* don't move closer */ |
396 |
greg |
1.2 |
for (i = 0; i < 3; i++) |
397 |
greg |
1.3 |
d += (vc[i] - ourview.vp[i])*ourview.vdir[i]; |
398 |
greg |
1.1 |
} else { |
399 |
|
|
nv.horiz = ourview.horiz; |
400 |
|
|
nv.vert = ourview.vert; |
401 |
greg |
1.2 |
d = sqrt(dist2(ourview.vp, vc)) / mag; |
402 |
greg |
1.1 |
} |
403 |
greg |
1.2 |
for (i = 0; i < 3; i++) |
404 |
|
|
nv.vp[i] = vc[i] - d*nv.vdir[i]; |
405 |
greg |
1.1 |
newview(&nv); |
406 |
greg |
1.17 |
} |
407 |
|
|
|
408 |
|
|
|
409 |
|
|
zoomview(vp, zf) /* zoom in our out */ |
410 |
|
|
register VIEW *vp; |
411 |
|
|
double zf; |
412 |
|
|
{ |
413 |
|
|
switch (vp->type) { |
414 |
|
|
case VT_PAR: /* parallel view */ |
415 |
|
|
case VT_ANG: /* angular fisheye */ |
416 |
|
|
vp->horiz /= zf; |
417 |
|
|
vp->vert /= zf; |
418 |
|
|
return; |
419 |
|
|
case VT_PER: /* perspective view */ |
420 |
|
|
vp->horiz = atan(tan(vp->horiz*(PI/180./2.))/zf) / |
421 |
|
|
(PI/180./2.); |
422 |
|
|
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / |
423 |
|
|
(PI/180./2.); |
424 |
|
|
return; |
425 |
|
|
case VT_HEM: /* hemispherical fisheye */ |
426 |
|
|
vp->horiz = sin(vp->horiz*(PI/180./2.))/zf; |
427 |
|
|
if (vp->horiz >= 1.0-FTINY) |
428 |
|
|
vp->horiz = 180.; |
429 |
|
|
else |
430 |
|
|
vp->horiz = asin(vp->horiz) / (PI/180./2.); |
431 |
|
|
vp->vert = sin(vp->vert*(PI/180./2.))/zf; |
432 |
|
|
if (vp->vert >= 1.0-FTINY) |
433 |
|
|
vp->vert = 180.; |
434 |
|
|
else |
435 |
|
|
vp->vert = asin(vp->vert) / (PI/180./2.); |
436 |
|
|
return; |
437 |
|
|
} |
438 |
greg |
1.1 |
} |