| 0,0 → 1,55 |
|---|
| /* |
| This file is part of Curvaceous, a Bzier drawing demo |
| Copyright (C) 1992-2006 Toby Thain, toby@telegraphics.com.au |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #ifndef CURVETO_H |
| #define CURVETO_H |
| |
| #ifdef macintosh |
| #include <quickdraw.h> |
| #include <fp.h> |
| #endif |
| |
| #define F(x) ((x)<<16) /* integer as Fixed */ |
| #define I(x) ((x)>>16) /* (truncated) Fixed as integer */ |
| #define P(p) I((p).x),I((p).y) |
| |
| #define FIX_FLOOR I |
| #define FIX_CEIL(x) I((x)+0xffff) |
| #define FIX_ROUND(x) I((x)+0x8000) |
| |
| typedef struct{ Fixed x,y; }pt; /* a fixed-point analogue to Point */ |
| |
| pt fpt(int x,int y); |
| void mid(pt *a,pt *b,pt *c); |
| void curve_bounds_fix(pt c[],Fixed *l,Fixed *t,Fixed *r,Fixed *b); |
| void curve_bounds(pt c[],Rect *r); |
| void divide_curve(pt c[],pt z[]); |
| int sgn(int x); |
| double sqr(double x); |
| int curve_step(pt c[],pt z[]); |
| int curve_step2(pt c[],pt z[],int d); |
| void curveto(pt c[]); |
| void curveto_rgn(pt c[],RgnHandle rgn); |
| Boolean curve_pick(pt c[],pt *p,Fixed tol,Fixed *t); |
| Boolean curve_pick_step(pt c[],pt *p,Fixed tol,Fixed *param,Fixed p0,Fixed p1); |
| void mark(pt *p,Boolean f); |
| |
| void curveto2(pt c[],int d);// draw the entire curve described by c[0..3] |
| |
| #endif // CURVETO_H |