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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 (xmax - xmin <= 0 || ymax - ymin <= 0)
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return;
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| 208 |
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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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| 220 |
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}
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| 221 |
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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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| 229 |
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| 230 |
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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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| 233 |
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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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| 237 |
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int mx, my;
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while (p->kid != NULL && pd--) {
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| 240 |
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| 241 |
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mx = (r->l + r->r) >> 1;
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| 242 |
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my = (r->d + r->u) >> 1;
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| 243 |
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| 244 |
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if (x < mx) {
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| 245 |
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r->r = mx;
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| 246 |
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if (y < my) {
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| 247 |
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r->u = my;
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| 248 |
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p = p->kid+DL;
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| 249 |
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} else {
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| 250 |
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r->d = my;
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| 251 |
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p = p->kid+UL;
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| 252 |
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}
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| 253 |
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} else {
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| 254 |
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r->l = mx;
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| 255 |
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if (y < my) {
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| 256 |
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r->u = my;
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| 257 |
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p = p->kid+DR;
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| 258 |
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} else {
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| 259 |
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r->d = my;
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| 260 |
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p = p->kid+UR;
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| 261 |
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}
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| 262 |
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}
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| 263 |
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}
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| 264 |
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return(p);
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| 265 |
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}
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| 266 |
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| 267 |
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| 268 |
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scalepict(p, sf) /* scale picture values */
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| 269 |
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register PNODE *p;
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| 270 |
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double sf;
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| 271 |
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{
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| 272 |
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scalecolor(p->v, sf); /* do this node */
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| 273 |
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| 274 |
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if (p->kid == NULL)
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| 275 |
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return;
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| 276 |
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/* do children */
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| 277 |
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scalepict(p->kid+DL, sf);
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| 278 |
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scalepict(p->kid+DR, sf);
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| 279 |
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scalepict(p->kid+UL, sf);
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| 280 |
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scalepict(p->kid+UR, sf);
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| 281 |
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}
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| 282 |
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| 283 |
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| 284 |
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getpictcolrs(yoff, scan, p, xsiz, ysiz) /* get scanline from picture */
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| 285 |
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int yoff;
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| 286 |
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register COLR *scan;
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| 287 |
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register PNODE *p;
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| 288 |
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int xsiz, ysiz;
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| 289 |
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{
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| 290 |
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register int mx;
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| 291 |
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int my;
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| 292 |
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| 293 |
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if (p->kid == NULL) { /* do this node */
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| 294 |
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setcolr(scan[0], colval(p->v,RED),
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| 295 |
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colval(p->v,GRN),
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| 296 |
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colval(p->v,BLU));
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| 297 |
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for (mx = 1; mx < xsiz; mx++)
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| 298 |
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copycolr(scan[mx], scan[0]);
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| 299 |
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return;
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| 300 |
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}
|
| 301 |
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/* do kids */
|
| 302 |
|
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mx = xsiz >> 1;
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| 303 |
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my = ysiz >> 1;
|
| 304 |
|
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if (yoff < my) {
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| 305 |
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getpictcolrs(yoff, scan, p->kid+DL, mx, my);
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| 306 |
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getpictcolrs(yoff, scan+mx, p->kid+DR, xsiz-mx, my);
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| 307 |
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} else {
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| 308 |
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getpictcolrs(yoff-my, scan, p->kid+UL, mx, ysiz-my);
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| 309 |
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getpictcolrs(yoff-my, scan+mx, p->kid+UR, xsiz-mx, ysiz-my);
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| 310 |
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}
|
| 311 |
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}
|
| 312 |
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| 313 |
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|
| 314 |
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pcopy(p1, p2) /* copy paint node p1 into p2 */
|
| 315 |
|
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register PNODE *p1, *p2;
|
| 316 |
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{
|
| 317 |
|
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copycolor(p2->v, p1->v);
|
| 318 |
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p2->x = p1->x;
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| 319 |
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p2->y = p1->y;
|
| 320 |
|
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}
|
| 321 |
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| 322 |
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| 323 |
|
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freepkids(p) /* free pnode's children */
|
| 324 |
|
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register PNODE *p;
|
| 325 |
|
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{
|
| 326 |
|
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if (p->kid == NULL)
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| 327 |
|
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return;
|
| 328 |
|
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freepkids(p->kid+DL);
|
| 329 |
|
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freepkids(p->kid+DR);
|
| 330 |
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freepkids(p->kid+UL);
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| 331 |
|
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freepkids(p->kid+UR);
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| 332 |
|
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free((char *)p->kid);
|
| 333 |
|
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p->kid = NULL;
|
| 334 |
|
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}
|
| 335 |
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| 336 |
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|
| 337 |
|
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newview(vp) /* change viewing parameters */
|
| 338 |
|
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register VIEW *vp;
|
| 339 |
|
|
{
|
| 340 |
|
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char *err;
|
| 341 |
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|
| 342 |
greg |
1.6 |
if (vp->hresolu > dev->xsiz || vp->vresolu > dev->ysiz) /* shrink */
|
| 343 |
|
|
if (vp->vresolu * dev->xsiz < vp->hresolu * dev->ysiz) {
|
| 344 |
|
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vp->vresolu = dev->xsiz * vp->vresolu / vp->hresolu;
|
| 345 |
|
|
vp->hresolu = dev->xsiz;
|
| 346 |
|
|
} else {
|
| 347 |
|
|
vp->hresolu = dev->ysiz * vp->hresolu / vp->vresolu;
|
| 348 |
|
|
vp->vresolu = dev->ysiz;
|
| 349 |
|
|
}
|
| 350 |
|
|
if ((err = setview(vp)) != NULL) {
|
| 351 |
greg |
1.1 |
sprintf(errmsg, "view not set - %s", err);
|
| 352 |
|
|
error(COMMAND, errmsg);
|
| 353 |
|
|
} else if (bcmp(vp, &ourview, sizeof(VIEW))) {
|
| 354 |
|
|
bcopy(&ourview, &oldview, sizeof(VIEW));
|
| 355 |
|
|
bcopy(vp, &ourview, sizeof(VIEW));
|
| 356 |
greg |
1.6 |
newimage(); /* newimage() calls with vp=&ourview! */
|
| 357 |
greg |
1.1 |
}
|
| 358 |
|
|
}
|
| 359 |
|
|
|
| 360 |
|
|
|
| 361 |
greg |
1.4 |
moveview(angle, elev, mag, vc) /* move viewpoint */
|
| 362 |
|
|
double angle, elev, mag;
|
| 363 |
greg |
1.1 |
FVECT vc;
|
| 364 |
|
|
{
|
| 365 |
|
|
extern double sqrt(), dist2();
|
| 366 |
|
|
double d;
|
| 367 |
greg |
1.4 |
FVECT v1;
|
| 368 |
greg |
1.1 |
VIEW nv;
|
| 369 |
|
|
register int i;
|
| 370 |
|
|
|
| 371 |
|
|
VCOPY(nv.vup, ourview.vup);
|
| 372 |
|
|
nv.hresolu = ourview.hresolu; nv.vresolu = ourview.vresolu;
|
| 373 |
|
|
spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.));
|
| 374 |
greg |
1.4 |
if (elev != 0.0) {
|
| 375 |
greg |
1.5 |
fcross(v1, ourview.vup, nv.vdir);
|
| 376 |
greg |
1.4 |
normalize(v1);
|
| 377 |
|
|
spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.));
|
| 378 |
|
|
}
|
| 379 |
greg |
1.1 |
if ((nv.type = ourview.type) == VT_PAR) {
|
| 380 |
|
|
nv.horiz = ourview.horiz / mag;
|
| 381 |
|
|
nv.vert = ourview.vert / mag;
|
| 382 |
greg |
1.3 |
d = 0.0; /* don't move closer */
|
| 383 |
greg |
1.2 |
for (i = 0; i < 3; i++)
|
| 384 |
greg |
1.3 |
d += (vc[i] - ourview.vp[i])*ourview.vdir[i];
|
| 385 |
greg |
1.1 |
} else {
|
| 386 |
|
|
nv.horiz = ourview.horiz;
|
| 387 |
|
|
nv.vert = ourview.vert;
|
| 388 |
greg |
1.2 |
d = sqrt(dist2(ourview.vp, vc)) / mag;
|
| 389 |
greg |
1.1 |
}
|
| 390 |
greg |
1.2 |
for (i = 0; i < 3; i++)
|
| 391 |
|
|
nv.vp[i] = vc[i] - d*nv.vdir[i];
|
| 392 |
greg |
1.1 |
newview(&nv);
|
| 393 |
|
|
}
|
| 394 |
|
|
|
| 395 |
|
|
|
| 396 |
|
|
spinvector(vres, vorig, vnorm, theta) /* rotate vector around normal */
|
| 397 |
|
|
FVECT vres, vorig, vnorm;
|
| 398 |
|
|
double theta;
|
| 399 |
|
|
{
|
| 400 |
|
|
extern double sin(), cos();
|
| 401 |
|
|
double sint, cost, dotp;
|
| 402 |
|
|
FVECT vperp;
|
| 403 |
|
|
register int i;
|
| 404 |
|
|
|
| 405 |
|
|
if (theta == 0.0) {
|
| 406 |
|
|
VCOPY(vres, vorig);
|
| 407 |
|
|
return;
|
| 408 |
|
|
}
|
| 409 |
|
|
sint = sin(theta);
|
| 410 |
|
|
cost = cos(theta);
|
| 411 |
|
|
dotp = DOT(vorig, vnorm);
|
| 412 |
|
|
fcross(vperp, vnorm, vorig);
|
| 413 |
|
|
for (i = 0; i < 3; i++)
|
| 414 |
|
|
vres[i] = vnorm[i]*dotp*(1.-cost) +
|
| 415 |
|
|
vorig[i]*cost + vperp[i]*sint;
|
| 416 |
|
|
}
|
