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
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
#define INKSCAPE_LPE_CIRCLE_WITH_RADIUS_CPP
/** \file
* LPE <circle_with_radius> implementation, used as an example for a base starting class
* when implementing new LivePathEffects.
*
* In vi, three global search-and-replaces will let you rename everything
* in this and the .h file:
*
* :%s/CIRCLE_WITH_RADIUS/YOURNAME/g
* :%s/CircleWithRadius/Yourname/g
* :%s/circle_with_radius/yourname/g
*/
/*
* Authors:
* Johan Engelen
*
* Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include "live_effects/lpe-circle_with_radius.h"
#include "display/curve.h"
#include <libnr/n-art-bpath.h>
// You might need to include other 2geom files. You can add them here:
#include <2geom/path.h>
#include <2geom/sbasis.h>
#include <2geom/bezier-to-sbasis.h>
#include <2geom/d2.h>
using namespace Geom;
namespace Inkscape {
namespace LivePathEffect {
LPECircleWithRadius::LPECircleWithRadius(LivePathEffectObject *lpeobject) :
Effect(lpeobject)//,
// initialise your parameters here:
//radius(_("Float parameter"), _("just a real number like 1.4!"), "svgname", &wr, this, 50)
{
// register all your parameters here, so Inkscape knows which parameters this effect has:
//registerParameter( dynamic_cast<Parameter *>(&radius) );
}
LPECircleWithRadius::~LPECircleWithRadius()
{
}
void _circle(Geom::Point center, double radius, std::vector<Geom::Path> &path_out) {
Geom::Path pb;
D2<SBasis> B;
Linear bo = Linear(0, 2 * M_PI);
B[0] = cos(bo,4);
B[1] = sin(bo,4);
B = B * radius + center;
pb.append(SBasisCurve(B));
path_out.push_back(pb);
}
std::vector<Geom::Path>
LPECircleWithRadius::doEffect_path (std::vector<Geom::Path> const & path_in)
{
std::vector<Geom::Path> path_out = std::vector<Geom::Path>();
Geom::Point center = path_in[0].initialPoint();
Geom::Point pt = path_in[0].finalPoint();
double radius = Geom::L2(pt - center);
_circle(center, radius, path_out);
return path_out;
}
/*
Geom::Piecewise<Geom::D2<Geom::SBasis> >
LPECircleWithRadius::doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > & pwd2_in)
{
Geom::Piecewise<Geom::D2<Geom::SBasis> > output;
output = pwd2_in; // spice this up to make the effect actually *do* something!
return output;
}
*/
/* ######################## */
} //namespace LivePathEffect
} /* namespace Inkscape */
/*
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 :
|
