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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef BASEGFX_BEZIERCLIP_HXX
#define BASEGFX_BEZIERCLIP_HXX
#include <vector>
struct Point2D
{
typedef double value_type;
Point2D( double _x, double _y ) : x(_x), y(_y) {}
Point2D() : x(), y() {}
double x;
double y;
};
struct Bezier
{
Point2D p0;
Point2D p1;
Point2D p2;
Point2D p3;
Point2D& operator[]( int i ) { return reinterpret_cast<Point2D*>(this)[i]; }
const Point2D& operator[]( int i ) const { return reinterpret_cast<const Point2D*>(this)[i]; }
};
struct FatLine
{
// line L through p1 and p4 in normalized implicit form
double a;
double b;
double c;
// the upper and lower distance from this line
double dMin;
double dMax;
};
template <typename DataType> DataType calcLineDistance( const DataType& a,
const DataType& b,
const DataType& c,
const DataType& x,
const DataType& y )
{
return a*x + b*y + c;
}
typedef ::std::vector< Point2D > Polygon2D;
/* little abs template */
template <typename NumType> NumType absval( NumType x )
{
return x<0 ? -x : x;
}
Polygon2D convexHull( const Polygon2D& rPoly );
// TODO: find proper epsilon here (try ::std::numeric_limits<NumType>::epsilon()?)!
#define DBL_EPSILON 1.0e-100
/* little approximate comparions */
template <typename NumType> bool tolZero( NumType n ) { return fabs(n) < DBL_EPSILON; }
template <typename NumType> bool tolEqual( NumType n1, NumType n2 ) { return tolZero(n1-n2); }
template <typename NumType> bool tolLessEqual( NumType n1, NumType n2 ) { return tolEqual(n1,n2) || n1<n2; }
template <typename NumType> bool tolGreaterEqual( NumType n1, NumType n2 ) { return tolEqual(n1,n2) || n1>n2; }
#endif /* BASEGFX_BEZIERCLIP_HXX */
|
