/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #include	<stdio.h>#include	"pic.h"#include	"y.tab.h" obj *circgen(int type){	static double rad[2] = { HT2, WID2 };	static double rad2[2] = { HT2, HT2 };	int i, at, t, with, battr;	double xwith, ywith;	double r, r2, ddval, fillval;	obj *p, *ppos;	Attr *ap; 	battr = at = 0;	with = xwith = ywith = fillval = ddval = 0;	t = (type == CIRCLE) ? 0 : 1;	if (type == CIRCLE)		r = r2 = getfval("circlerad");	else if (type == ELLIPSE) {		r = getfval("ellipsewid") / 2;		r2 = getfval("ellipseht") / 2;	}	for (i = 0; i < nattr; i++) {		ap = &attr[i];		switch (ap->a_type) {		case TEXTATTR:			savetext(ap->a_sub, ap->a_val.p);			break;		case RADIUS:			r = ap->a_val.f;			break;		case DIAMETER:		case WIDTH:			r = ap->a_val.f / 2;			break;		case HEIGHT:			r2 = ap->a_val.f / 2;			break;		case SAME:			r = rad[t];			r2 = rad2[t];			break;		case WITH:			with = ap->a_val.i;			break;		case AT:			ppos = ap->a_val.o;			curx = ppos->o_x;			cury = ppos->o_y;			at++;			break;		case INVIS:			battr |= INVIS;			break;		case NOEDGE:			battr |= NOEDGEBIT;			break;		case DOT:		case DASH:			battr |= ap->a_type==DOT ? DOTBIT : DASHBIT;			if (ap->a_sub == DEFAULT)				ddval = getfval("dashwid");			else				ddval = ap->a_val.f;			break;		case FILL:			battr |= FILLBIT;			if (ap->a_sub == DEFAULT)				fillval = getfval("fillval");			else				fillval = ap->a_val.f;			break;		}	}	if (type == CIRCLE)		r2 = r;	/* probably superfluous */	if (with) {		switch (with) {		case NORTH:	ywith = -r2; break;		case SOUTH:	ywith = r2; break;		case EAST:	xwith = -r; break;		case WEST:	xwith = r; break;		case NE:	xwith = -r * 0.707; ywith = -r2 * 0.707; break;		case SE:	xwith = -r * 0.707; ywith = r2 * 0.707; break;		case NW:	xwith = r * 0.707; ywith = -r2 * 0.707; break;		case SW:	xwith = r * 0.707; ywith = r2 * 0.707; break;		}		curx += xwith;		cury += ywith;	}	if (!at) {		if (isright(hvmode))			curx += r;		else if (isleft(hvmode))			curx -= r;		else if (isup(hvmode))			cury += r2;		else			cury -= r2;	}	p = makenode(type, 2);	p->o_val[0] = rad[t] = r;	p->o_val[1] = rad2[t] = r2;	if (r <= 0 || r2 <= 0) {		ERROR "%s has invalid radius %g\n", (type==CIRCLE) ? "circle" : "ellipse", r<r2 ? r : r2 WARNING;	}	p->o_attr = battr;	p->o_ddval = ddval;	p->o_fillval = fillval;	extreme(curx+r, cury+r2);	extreme(curx-r, cury-r2);	if (type == CIRCLE)		dprintf("C %g %g %g\n", curx, cury, r);	if (type == ELLIPSE)		dprintf("E %g %g %g %g\n", curx, cury, r, r2);	if (isright(hvmode))		curx += r;	else if (isleft(hvmode))		curx -= r;	else if (isup(hvmode))		cury += r2;	else		cury -= r2;	return(p);}