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#include "x11icon.h" |
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#ifndef FEQ |
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#define FEQ(a,b) ((a)-(b) <= FTINY && (a)-(b) >= -FTINY) |
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#endif |
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#define CTRL(c) ((c)-'@') |
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#define GAMMA 2.2 /* default gamma correction */ |
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#define MOVPCT 10 /* percent distance to move */ |
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#define MOVPCT 7 /* percent distance to move /frame */ |
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#define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1) |
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#define MOVDEG (-5) /* degrees to orbit CW/down /frame */ |
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#define MOVORB(s) ((s)&ShiftMask ? 1 : (s)&ControlMask ? -1 : 0) |
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#define MINWIDTH 480 /* minimum graphics window width */ |
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#define MINHEIGHT 400 /* minimum graphics window height */ |
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} |
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int |
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dev_view(nv) /* assign new driver view */ |
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VIEW *nv; |
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{ |
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if (nv != &odev.v) |
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if (nv->type == VT_PAR || /* check view legality */ |
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nv->horiz > 160. || nv->vert > 160.) { |
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error(COMMAND, "illegal view type/angle"); |
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nv->type = VT_PER; |
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nv->horiz = odev.v.horiz; |
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nv->vert = odev.v.vert; |
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return(0); |
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} |
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if (nv->vfore > FTINY) { |
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error(COMMAND, "cannot handle fore clipping"); |
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nv->vfore = 0.; |
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return(0); |
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} |
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if (nv != &odev.v) { |
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if (!FEQ(nv->horiz,odev.v.horiz) || /* resize window? */ |
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!FEQ(nv->vert,odev.v.vert)) { |
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int dw = DisplayWidth(ourdisplay,ourscreen); |
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int dh = DisplayHeight(ourdisplay,ourscreen); |
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dw -= 25; /* for window frame */ |
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dh -= 100; |
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odev.hres = 2.*VIEWDIST/pwidth * |
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tan(PI/180./2.*nv->horiz); |
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odev.vres = 2.*VIEWDIST/pheight * |
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tan(PI/180./2.*nv->vert); |
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if (odev.hres > dw) { |
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odev.vres = dw * odev.vres / odev.hres; |
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odev.hres = dw; |
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} |
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if (odev.vres > dh) { |
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odev.hres = dh * odev.hres / odev.vres; |
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odev.vres = dh; |
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} |
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XResizeWindow(ourdisplay, gwind, odev.hres, odev.vres); |
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} |
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copystruct(&odev.v, nv); |
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} |
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qtReplant(); |
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return(1); |
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} |
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static |
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moveview(dx, dy, move) /* move our view */ |
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int dx, dy, move; |
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moveview(dx, dy, mov, orb) /* move our view */ |
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int dx, dy, mov, orb; |
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{ |
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VIEW nv; |
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FVECT v1; |
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double d; |
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register int i, li; |
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register int li; |
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/* start with old view */ |
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copystruct(&nv, &odev.v); |
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/* change view direction */ |
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if (move) { |
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if (mov | orb) { |
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if ((li = qtFindLeaf(dx, dy)) < 0) |
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return(0); /* not on window */ |
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for (i = 0; i < 3; i++) |
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nv.vdir[i] = qtL.wp[li][i] - nv.vp[i]; |
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VSUM(nv.vdir, qtL.wp[li], nv.vp, -1.); |
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} else { |
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if (viewray(nv.vp, nv.vdir, &odev.v, |
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(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY) |
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return(0); /* outside view */ |
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} |
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/* move viewpoint */ |
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if (move > 0) |
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for (i = 0; i < 3; i++) |
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nv.vp[i] += MOVPCT/100. * nv.vdir[i]; |
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else if (move < 0) |
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for (i = 0; i < 3; i++) |
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nv.vp[i] -= MOVPCT/100. * nv.vdir[i]; |
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if (move && headlocked) { |
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d = 0; /* bring head back to same height */ |
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for (i = 0; i < 3; i++) |
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d += odev.v.vup[i] * (odev.v.vp[i] - nv.vp[i]); |
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for (i = 0; i < 3; i++) |
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nv.vp[i] += d * odev.v.vup[i]; |
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if (orb && mov) { /* orbit left/right */ |
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spinvector(nv.vdir, nv.vdir, nv.vup, MOVDEG*PI/180.*mov); |
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VSUM(nv.vp, qtL.wp[li], nv.vdir, -1.); |
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} else if (orb) { /* orbit up/down */ |
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fcross(v1, nv.vdir, nv.vup); |
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if (normalize(v1) == 0.) |
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return(0); |
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spinvector(nv.vdir, nv.vdir, v1, MOVDEG*PI/180.*orb); |
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VSUM(nv.vp, qtL.wp[li], nv.vdir, -1.); |
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} else if (mov) { /* move forward/backward */ |
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d = MOVPCT/100. * mov; |
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VSUM(nv.vp, nv.vp, nv.vdir, d); |
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} |
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if (!mov ^ !orb && headlocked) { /* restore head height */ |
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VSUM(v1, odev.v.vp, nv.vp, -1.); |
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d = DOT(v1, odev.v.vup); |
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VSUM(nv.vp, nv.vp, odev.v.vup, d); |
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} |
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if (setview(&nv) != NULL) |
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return(0); /* illegal view */ |
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dev_view(&nv); |
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getmove(ebut) /* get view change */ |
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XButtonPressedEvent *ebut; |
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{ |
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int whichbutton = ebut->button; |
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int movdir = MOVDIR(ebut->button); |
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int movorb = MOVORB(ebut->state); |
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int oldnodesiz = qtMinNodesiz; |
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Window rootw, childw; |
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int rootx, rooty, wx, wy; |
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&rootx, &rooty, &wx, &wy, &statemask)) |
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break; /* on another screen */ |
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if (!moveview(wx, odev.vres-1-wy, MOVDIR(whichbutton))) { |
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if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) { |
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sleep(1); |
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continue; |
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} |
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draw_grids(); |
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} |
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if (!(inpresflags & DEV_NEWVIEW)) { /* do final motion */ |
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whichbutton = levptr(XButtonReleasedEvent)->button; |
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movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
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wx = levptr(XButtonReleasedEvent)->x; |
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wy = levptr(XButtonReleasedEvent)->y; |
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moveview(wx, odev.vres-1-wy, MOVDIR(whichbutton)); |
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moveview(wx, odev.vres-1-wy, movdir, movorb); |
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} |
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dev_flush(); |
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case 'H': /* turn off height motion lock */ |
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headlocked = 0; |
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return; |
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case 'l': /* retrieve last view */ |
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inpresflags |= DEV_LASTVIEW; |
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return; |
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case CTRL('S'): |
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case 'p': /* pause computation */ |
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inpresflags |= DEV_WAIT; |
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return; |
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case 'v': /* spit out view */ |
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fputs(VIEWSTR, stderr); |
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fprintview(&odev.v, stderr); |
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fputc('\n', stderr); |
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inpresflags |= DEV_PUTVIEW; |
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return; |
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case CTRL('Q'): |
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case '\n': |
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if (ersz->width == odev.hres && ersz->height == odev.vres) |
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return; |
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if (odev.hres != 0 && odev.vres != 0) { |
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odev.v.horiz = 2.*180./PI * atan( |
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tan(PI/180./2.*odev.v.horiz) * ersz->width/odev.hres ); |
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odev.v.vert = 2.*180./PI * atan( |
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tan(PI/180./2.*odev.v.vert) * ersz->height/odev.vres ); |
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inpresflags |= DEV_NEWVIEW; |
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} |
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odev.hres = ersz->width; |
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odev.vres = ersz->height; |
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inpresflags |= DEV_NEWSIZE; |
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odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres); |
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odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres); |
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inpresflags |= DEV_NEWSIZE|DEV_NEWVIEW; |
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} |
