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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Authors:
* Maximilian Albert <maximilian.albert@gmail.com>
* Johan Engelen <j.b.c.engelen@alumnus.utwente.nl>
*
* Copyright (C) Authors 2007-2012
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "live_effects/lpe-angle_bisector.h"
#include "2geom/sbasis-to-bezier.h"
#include "knot-holder-entity.h"
#include "knotholder.h"
// TODO due to internal breakage in glibmm headers, this must be last:
#include <glibmm/i18n.h>
namespace Inkscape {
namespace LivePathEffect {
namespace AB {
class KnotHolderEntityLeftEnd : public LPEKnotHolderEntity {
public:
KnotHolderEntityLeftEnd(LPEAngleBisector* effect) : LPEKnotHolderEntity(effect) {};
void knot_set(Geom::Point const &p, Geom::Point const &origin, guint state) override;
Geom::Point knot_get() const override;
};
class KnotHolderEntityRightEnd : public LPEKnotHolderEntity {
public:
KnotHolderEntityRightEnd(LPEAngleBisector* effect) : LPEKnotHolderEntity(effect) {};
void knot_set(Geom::Point const &p, Geom::Point const &origin, guint state) override;
Geom::Point knot_get() const override;
};
} // namespace AB
LPEAngleBisector::LPEAngleBisector(LivePathEffectObject *lpeobject) :
Effect(lpeobject),
length_left(_("Length left:"), _("Specifies the left end of the bisector"), "length-left", &wr, this, 0),
length_right(_("Length right:"), _("Specifies the right end of the bisector"), "length-right", &wr, this, 250)
{
show_orig_path = true;
_provides_knotholder_entities = true;
registerParameter( dynamic_cast<Parameter *>(&length_left) );
registerParameter( dynamic_cast<Parameter *>(&length_right) );
}
LPEAngleBisector::~LPEAngleBisector()
= default;
Geom::PathVector
LPEAngleBisector::doEffect_path (Geom::PathVector const & path_in)
{
using namespace Geom;
// we assume that the path has >= 3 nodes
ptA = path_in[0].pointAt(1);
Point B = path_in[0].initialPoint();
Point C = path_in[0].pointAt(2);
double angle = angle_between(B - ptA, C - ptA);
dir = unit_vector(B - ptA) * Rotate(angle/2);
Geom::Point D = ptA - dir * length_left;
Geom::Point E = ptA + dir * length_right;
Piecewise<D2<SBasis> > output = Piecewise<D2<SBasis> >(D2<SBasis>(SBasis(D[X], E[X]), SBasis(D[Y], E[Y])));
return path_from_piecewise(output, LPE_CONVERSION_TOLERANCE);
}
void
LPEAngleBisector::addKnotHolderEntities(KnotHolder *knotholder, SPDesktop *desktop, SPItem *item) {
{
KnotHolderEntity *e = new AB::KnotHolderEntityLeftEnd(this);
e->create(desktop, item, knotholder, Inkscape::CTRL_TYPE_LPE, _("Adjust the \"left\" end of the bisector"));
knotholder->add(e);
}
{
KnotHolderEntity *e = new AB::KnotHolderEntityRightEnd(this);
e->create(desktop, item, knotholder, Inkscape::CTRL_TYPE_LPE, _("Adjust the \"right\" end of the bisector"));
knotholder->add(e);
}
};
namespace AB {
void
KnotHolderEntityLeftEnd::knot_set(Geom::Point const &p, Geom::Point const &/*origin*/, guint state)
{
LPEAngleBisector *lpe = dynamic_cast<LPEAngleBisector *>(_effect);
Geom::Point const s = snap_knot_position(p, state);
double lambda = Geom::nearest_time(s, lpe->ptA, lpe->dir);
lpe->length_left.param_set_value(-lambda);
sp_lpe_item_update_patheffect (SP_LPE_ITEM(item), false, true);
}
void
KnotHolderEntityRightEnd::knot_set(Geom::Point const &p, Geom::Point const &/*origin*/, guint state)
{
LPEAngleBisector *lpe = dynamic_cast<LPEAngleBisector *>(_effect);
Geom::Point const s = snap_knot_position(p, state);
double lambda = Geom::nearest_time(s, lpe->ptA, lpe->dir);
lpe->length_right.param_set_value(lambda);
sp_lpe_item_update_patheffect (SP_LPE_ITEM(item), false, true);
}
Geom::Point
KnotHolderEntityLeftEnd::knot_get() const
{
LPEAngleBisector const* lpe = dynamic_cast<LPEAngleBisector const*>(_effect);
return lpe->ptA - lpe->dir * lpe->length_left;
}
Geom::Point
KnotHolderEntityRightEnd::knot_get() const
{
LPEAngleBisector const* lpe = dynamic_cast<LPEAngleBisector const*>(_effect);
return lpe->ptA + lpe->dir * lpe->length_right;
}
} // namespace AB
/* ######################## */
} //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 :
|
