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#define INKSCAPE_LPE_COPY_ROTATE_CPP
/** \file
* LPE <copy_rotate> implementation
*/
/*
* 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, 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>
#include <2geom/angle.h>
#include "knot-holder-entity.h"
#include "knotholder.h"
namespace Inkscape {
namespace LivePathEffect {
namespace CR {
class KnotHolderEntityStartingAngle : public LPEKnotHolderEntity {
public:
KnotHolderEntityStartingAngle(LPECopyRotate *effect) : LPEKnotHolderEntity(effect) {};
virtual void knot_set(Geom::Point const &p, Geom::Point const &origin, guint state);
virtual Geom::Point knot_get();
};
class KnotHolderEntityRotationAngle : public LPEKnotHolderEntity {
public:
KnotHolderEntityRotationAngle(LPECopyRotate *effect) : LPEKnotHolderEntity(effect) {};
virtual void knot_set(Geom::Point const &p, Geom::Point const &origin, guint state);
virtual Geom::Point knot_get();
};
} // namespace CR
LPECopyRotate::LPECopyRotate(LivePathEffectObject *lpeobject) :
Effect(lpeobject),
starting_angle(_("Starting"), _("Angle of the first copy"), "starting_angle", &wr, this, 0.0),
rotation_angle(_("Rotation angle"), _("Angle between two successive copies"), "rotation_angle", &wr, this, 30.0),
num_copies(_("Number of copies"), _("Number of copies of the original path"), "num_copies", &wr, this, 5),
origin(_("Origin"), _("Origin of the rotation"), "origin", &wr, this, "Adjust the origin of the rotation"),
dist_angle_handle(100)
{
show_orig_path = true;
_provides_knotholder_entities = true;
// register all your parameters here, so Inkscape knows which parameters this effect has:
registerParameter( dynamic_cast<Parameter *>(&starting_angle) );
registerParameter( dynamic_cast<Parameter *>(&rotation_angle) );
registerParameter( dynamic_cast<Parameter *>(&num_copies) );
registerParameter( dynamic_cast<Parameter *>(&origin) );
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());
B = *(curve->last_point());
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;
// I first suspected the minus sign to be a bug in 2geom but it is
// likely due to SVG's choice of coordinate system orientation (max)
start_pos = origin + dir * Rotate(-deg_to_rad(starting_angle)) * dist_angle_handle;
rot_pos = origin + dir * Rotate(-deg_to_rad(starting_angle + rotation_angle)) * dist_angle_handle;
A = pwd2_in.firstValue();
B = pwd2_in.lastValue();
dir = unit_vector(B - A);
Piecewise<D2<SBasis> > output;
Affine pre = Translate(-origin) * Rotate(-deg_to_rad(starting_angle));
for (int i = 0; i < num_copies; ++i) {
// I first suspected the minus sign to be a bug in 2geom but it is
// likely due to SVG's choice of coordinate system orientation (max)
Rotate rot(-deg_to_rad(rotation_angle * i));
Affine t = pre * rot * Translate(origin);
output.concat(pwd2_in * t);
}
return output;
}
void
LPECopyRotate::addCanvasIndicators(SPLPEItem */*lpeitem*/, std::vector<Geom::PathVector> &hp_vec)
{
using namespace Geom;
Path path(start_pos);
path.appendNew<LineSegment>((Geom::Point) origin);
path.appendNew<LineSegment>(rot_pos);
PathVector pathv;
pathv.push_back(path);
hp_vec.push_back(pathv);
}
void LPECopyRotate::addKnotHolderEntities(KnotHolder *knotholder, SPDesktop *desktop, SPItem *item) {
{
KnotHolderEntity *e = new CR::KnotHolderEntityStartingAngle(this);
e->create( desktop, item, knotholder, Inkscape::CTRL_TYPE_UNKNOWN,
_("Adjust the starting angle") );
knotholder->add(e);
}
{
KnotHolderEntity *e = new CR::KnotHolderEntityRotationAngle(this);
e->create( desktop, item, knotholder, Inkscape::CTRL_TYPE_UNKNOWN,
_("Adjust the rotation angle") );
knotholder->add(e);
}
};
namespace CR {
using namespace Geom;
void
KnotHolderEntityStartingAngle::knot_set(Geom::Point const &p, Geom::Point const &/*origin*/, guint state)
{
LPECopyRotate* lpe = dynamic_cast<LPECopyRotate *>(_effect);
Geom::Point const s = snap_knot_position(p);
// I first suspected the minus sign to be a bug in 2geom but it is
// likely due to SVG's choice of coordinate system orientation (max)
lpe->starting_angle.param_set_value(rad_to_deg(-angle_between(lpe->dir, s - 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);
}
void
KnotHolderEntityRotationAngle::knot_set(Geom::Point const &p, Geom::Point const &/*origin*/, guint state)
{
LPECopyRotate* lpe = dynamic_cast<LPECopyRotate *>(_effect);
Geom::Point const s = snap_knot_position(p);
// I first suspected the minus sign to be a bug in 2geom but it is
// likely due to SVG's choice of coordinate system orientation (max)
lpe->rotation_angle.param_set_value(rad_to_deg(-angle_between(lpe->dir, s - lpe->origin)) - lpe->starting_angle);
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);
}
Geom::Point
KnotHolderEntityStartingAngle::knot_get()
{
LPECopyRotate* lpe = dynamic_cast<LPECopyRotate *>(_effect);
return snap_knot_position(lpe->start_pos);
}
Geom::Point
KnotHolderEntityRotationAngle::knot_get()
{
LPECopyRotate* lpe = dynamic_cast<LPECopyRotate *>(_effect);
return snap_knot_position(lpe->rot_pos);
}
} // 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 :
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