/* === S Y N F I G ========================================================= */
/*! \file simplecircle.cpp
** \brief Implementation of the "Simple Circle" layer
**
** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
** Copyright (c) 2008 Chris Moore
** Copyright (c) 2011 Carlos López
**
** This package is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License as
** published by the Free Software Foundation; either version 2 of
** the License, or (at your option) any later version.
**
** This package is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
** General Public License for more details.
** \endlegal
*/
/* ========================================================================= */
/* === H E A D E R S ======================================================= */
#ifdef USING_PCH
# include "pch.h"
#else
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <synfig/localization.h>
#include <synfig/general.h>
#include <synfig/string.h>
#include <synfig/time.h>
#include <synfig/context.h>
#include <synfig/paramdesc.h>
#include <synfig/renddesc.h>
#include <synfig/surface.h>
#include <synfig/value.h>
#include <synfig/valuenode.h>
#include "simplecircle.h"
#endif
/* === U S I N G =========================================================== */
using namespace etl;
using namespace std;
using namespace synfig;
/* === G L O B A L S ======================================================= */
SYNFIG_LAYER_INIT(SimpleCircle);
SYNFIG_LAYER_SET_NAME(SimpleCircle,"simple_circle");
SYNFIG_LAYER_SET_LOCAL_NAME(SimpleCircle,N_("Simple Circle"));
SYNFIG_LAYER_SET_CATEGORY(SimpleCircle,N_("Example"));
SYNFIG_LAYER_SET_VERSION(SimpleCircle,"0.1");
SYNFIG_LAYER_SET_CVS_ID(SimpleCircle,"$Id$");
/* === P R O C E D U R E S ================================================= */
/* === M E T H O D S ======================================================= */
/* === E N T R Y P O I N T ================================================= */
SimpleCircle::SimpleCircle():
param_radius(ValueBase(Real(0.5)))
{
SET_INTERPOLATION_DEFAULTS();
SET_STATIC_DEFAULTS();
}
void
SimpleCircle::sync_vfunc()
{
const int num_splines = 8;
const Angle::deg angle(180.0/(Real)num_splines);
const Real k = 1.0 / Angle::cos(angle).get();
Real radius = fabs(param_radius.get(Real()));
Matrix2 matrix;
matrix.set_rotate(angle);
Vector p0, p1, p2(radius, 0.0);
clear();
move_to(p2[0], p2[1]);
for(int i = 0; i < num_splines; ++i)
{
Vector p0 = p2;
p1 = matrix.get_transformed(p0);
p2 = matrix.get_transformed(p1);
conic_to(p2[0], p2[1], k*p1[0], k*p1[1]);
}
close();
}
bool
SimpleCircle::set_shape_param(const synfig::String & param, const synfig::ValueBase &value)
{
IMPORT_VALUE(param_radius);
return false;
}
bool
SimpleCircle::set_param(const String & param, const ValueBase &value)
{
if (set_shape_param(param, value))
{ force_sync(); return true; }
if ( param == "color" )
return Layer_Shape::set_param(param, value);
if ( param == "center" )
return Layer_Shape::set_param("origin", value);
return Layer_Composite::set_param(param,value);
}
ValueBase
SimpleCircle::get_param(const String ¶m)const
{
EXPORT_VALUE(param_radius);
EXPORT_NAME();
EXPORT_VERSION();
if ( param == "color" )
return Layer_Shape::get_param(param);
if ( param == "center" )
return Layer_Shape::get_param("origin");
return Layer_Composite::get_param(param);
}
Layer::Vocab
SimpleCircle::get_param_vocab()const
{
Layer::Vocab ret(Layer_Composite::get_param_vocab());
Layer::Vocab shape(Layer_Shape::get_param_vocab());
ret.push_back(shape["color"]);
ret.push_back(ParamDesc("center")
.set_local_name(_("Center"))
.set_description(_("Center of the circle"))
);
ret.push_back(ParamDesc("radius")
.set_local_name(_("Radius"))
.set_description(_("This is the radius of the circle"))
.set_origin("center")
.set_is_distance()
);
return ret;
}