blob: 7c181832c651927f5dc2d76c5108549a5a57f0e6 (
plain)
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
|
#ifndef INKSCAPE_HELPER_GEOM_CURVES_H
#define INKSCAPE_HELPER_GEOM_CURVES_H
/**
* Specific curve type functions for Inkscape, not provided by lib2geom.
*
* Author:
* Johan Engelen <goejendaagh@zonnet.nl>
*
* Copyright (C) 2008-2009 Johan Engelen
*
* Released under GNU GPL
*/
#include <2geom/hvlinesegment.h>
#include <2geom/line.h>
#include <2geom/bezier-curve.h>
/// \todo un-inline this function
inline bool is_straight_curve(Geom::Curve const & c) {
if( dynamic_cast<Geom::LineSegment const*>(&c) ||
dynamic_cast<Geom::HLineSegment const*>(&c) ||
dynamic_cast<Geom::VLineSegment const*>(&c) )
{
return true;
}
// the curve can be a quad/cubic bezier, but could still be a perfect straight line
// if the control points are exactly on the line connecting the initial and final points.
else if ( Geom::QuadraticBezier const *quad = dynamic_cast<Geom::QuadraticBezier const*>(&c) ) {
Geom::Line line( quad->initialPoint(), quad->finalPoint() );
if ( are_near((*quad)[1], line) ) {
return true;
}
}
else if ( Geom::CubicBezier const *cubic = dynamic_cast<Geom::CubicBezier const*>(&c) ) {
Geom::Line line( cubic->initialPoint(), cubic->finalPoint() );
if ( are_near((*cubic)[1], line) && are_near((*cubic)[2], line) ) {
return true;
}
}
return false;
}
#endif // INKSCAPE_HELPER_GEOM_CURVES_H
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
|
