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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
#define INKSCAPE_LPE_COPY_ROTATE_CPP
/** \file
* LPE <copy_rotate> implementation
*/
/*
* Authors:
* Maximilian Albert
*
* Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
* Copyright (C) Maximilian Albert 2008 <maximilian.albert@gmail.com>
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include "live_effects/lpe-copy_rotate.h"
#include "sp-shape.h"
#include "display/curve.h"
#include <2geom/path.h>
#include <2geom/transforms.h>
#include <2geom/d2-sbasis.h>
namespace Inkscape {
namespace LivePathEffect {
namespace CR {
class KnotHolderEntityAngle : public KnotHolderEntity
{
public:
virtual bool isLPEParam() { return true; }
virtual void knot_set(NR::Point const &p, NR::Point const &origin, guint state);
virtual NR::Point knot_get();
};
} // namespace CR
LPECopyRotate::LPECopyRotate(LivePathEffectObject *lpeobject) :
Effect(lpeobject),
include_original(_("Include original?"), _(""), "include_original", &wr, this, false),
angle(_("Angle"), _("Angle"), "angle", &wr, this, 30.0),
num_copies(_("Number of copies"), _("Number of copies of the original path"), "num_copies", &wr, this, 1),
origin(_("Origin"), _("Origin of the rotation"), "origin", &wr, this),
dist_angle_handle(100)
{
show_orig_path = true;
// register all your parameters here, so Inkscape knows which parameters this effect has:
registerParameter( dynamic_cast<Parameter *>(&include_original) );
registerParameter( dynamic_cast<Parameter *>(&angle) );
registerParameter( dynamic_cast<Parameter *>(&num_copies) );
registerParameter( dynamic_cast<Parameter *>(&origin) );
registerKnotHolderHandle(new CR::KnotHolderEntityAngle(), _("Adjust the angle"));
num_copies.param_make_integer(true);
num_copies.param_set_range(0, 1000);
}
LPECopyRotate::~LPECopyRotate()
{
}
void
LPECopyRotate::doOnApply(SPLPEItem *lpeitem)
{
SPCurve *curve = SP_SHAPE(lpeitem)->curve;
A = curve->first_point().to_2geom();
B = curve->last_point().to_2geom();
origin.param_setValue(A);
dir = unit_vector(B - A);
dist_angle_handle = L2(B - A);
}
Geom::Piecewise<Geom::D2<Geom::SBasis> >
LPECopyRotate::doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in)
{
using namespace Geom;
A = pwd2_in.firstValue();
B = pwd2_in.lastValue();
dir = unit_vector(B - A);
Piecewise<D2<SBasis> > output;
if (include_original) {
output = pwd2_in;
}
for (int i = 1; i <= num_copies; ++i) {
Rotate rot(deg_to_rad(angle * i));
Matrix t = Translate(-origin) * rot * Translate(origin);
output.concat(pwd2_in * t);
}
return output;
}
namespace CR {
using namespace Geom;
// TODO: make this more generic
static LPECopyRotate *
get_effect(SPItem *item)
{
Effect *effect = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item));
if (effect->effectType() != COPY_ROTATE) {
g_print ("Warning: Effect is not of type LPECopyRotate!\n");
return NULL;
}
return static_cast<LPECopyRotate *>(effect);
}
void
KnotHolderEntityAngle::knot_set(NR::Point const &p, NR::Point const &/*origin*/, guint state)
{
LPECopyRotate* lpe = get_effect(item);
// FIXME: is the minus sign due to a bug in 2geom?
lpe->angle.param_set_value(rad_to_deg(-angle_between(lpe->dir, p.to_2geom() - lpe->origin)));
if (state & GDK_SHIFT_MASK) {
lpe->dist_angle_handle = L2(lpe->B - lpe->A);
} else {
lpe->dist_angle_handle = L2(p - lpe->origin);
}
// FIXME: this should not directly ask for updating the item. It should write to SVG, which triggers updating.
sp_lpe_item_update_patheffect (SP_LPE_ITEM(item), false, true);
}
NR::Point
KnotHolderEntityAngle::knot_get()
{
LPECopyRotate* lpe = get_effect(item);
// FIXME: is the minus sign due to a bug in 2geom?
Point d = lpe->dir * Rotate(-deg_to_rad(lpe->angle)) * lpe->dist_angle_handle;
return lpe->origin + d;
}
} // namespace CR
/* ######################## */
} //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 :
|
