1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
/*
Copyright (C) 2003 Nikolas Zimmermann <wildfox@kde.org>
This file is part of the KDE project
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
aint with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef T2P_BEZIERPATH_H
#define T2P_BEZIERPATH_H
#include <list>
namespace T2P
{
class Point;
class BezierPath
{
public:
BezierPath() { }
virtual ~BezierPath() { }
/**
* Calculates the arclength from p0 to the point parametrized by 0 <= t <= 1.
*/
virtual double length(double t = 1.0) = 0;
/**
* Calculates the point, the tangent vector and the normal vector for
* 0 <= t <= 1. The tangent vector and the normal vector are
* normalized (length=1).
*/
virtual void pointTangentNormalAt(double t, Point *p = 0, Point *tn = 0, Point *n = 0) = 0;
/**
* Calculates the axis-aligned bounding box.
*/
virtual void boundingBox(Point *topLeft, Point *bottomRight) = 0;
};
}
#endif
// vim:ts=4:noet
|
