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/* Dia -- an diagram creation/manipulation program
* Support for computing bounding boxes
* Copyright (C) 2001 Cyrille Chepelov
*
* 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.
*/
/*!
* \defgroup ObjectBBox Bounding box
* \brief Calculations considering line width, caps and joins
* \ingroup ObjectParts
*/
#ifndef BOUNDINGBOX_H
#define BOUNDINGBOX_H
#include "diatypes.h"
#include "geometry.h"
/*!
* \brief Polygon/Polyline bounding box extras
* \ingroup ObjectBBox
*/
struct _PolyBBExtras {
real start_long, start_trans;
real middle_trans;
real end_long, end_trans;
};
/*!
* \brief Line bounding box extras
* \ingroup ObjectBBox
*/
struct _LineBBExtras {
real start_long, start_trans;
real end_long, end_trans;
};
/*!
* \brief Element bounding box extras
* \ingroup ObjectBBox
*/
struct _ElementBBExtras {
real border_trans;
};
void bicubicbezier2D_bbox(const Point *p0,const Point *p1,
const Point *p2,const Point *p3,
const PolyBBExtras *extra,
Rectangle *rect);
/*!
* \brief Bounding box calculation for a straight line
* The calcualtion includes line width and arrwos with the right extra
* \ingroup ObjectBBox
*/
void line_bbox(const Point *p1, const Point *p2,
const LineBBExtras *extra,
Rectangle *rect);
/*!
* \brief Bounding box calculation for a rectangle
* The calcualtion includes line width with the right extra
* \ingroup ObjectBBox
*/
void rectangle_bbox(const Rectangle *rin,
const ElementBBExtras *extra,
Rectangle *rout);
/*!
* \brief Bounding box calculation for an ellipse
* The calcualtion includes line width with the right extra
* \ingroup ObjectBBox
*/
void ellipse_bbox(const Point *centre, real width, real height,
const ElementBBExtras *extra,
Rectangle *rect);
/*!
* \brief Bounding box calculation for a polyline
* The calcualtion includes line width and arrwos with the right extra
* \ingroup ObjectBBox
*/
void polyline_bbox(const Point *pts, int numpoints,
const PolyBBExtras *extra, gboolean closed,
Rectangle *rect);
/*!
* \brief Bounding box calculation for a bezier
* The calcualtion includes line width and arrwos with the right extra
* \ingroup ObjectBBox
*/
void polybezier_bbox(const BezPoint *pts, int numpoints,
const PolyBBExtras *extra, gboolean closed,
Rectangle *rect);
/* helpers for bezier curve calculation */
void bernstein_develop(const real p[4],real *A,real *B,real *C,real *D);
real bezier_eval(const real p[4],real u);
real bezier_eval_tangent(const real p[4],real u);
#endif /* BOUNDINGBOX_H */
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