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// K-3D
// Copyright (c) 1995-2004, Timothy M. Shead
//
// Contact: tshead@k-3d.com
//
// This program 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 program 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.
//
// You should have received a copy of the GNU General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
/** \file
\author Romain Behar (romainbehar@yahoo.com)
*/
#include <k3dsdk/imaterial.h>
#include <k3dsdk/object.h>
#include <k3dsdk/persistence.h>
#include <k3dsdk/material.h>
#include <k3dsdk/material_collection.h>
#include <k3dsdk/measurement.h>
#include <k3dsdk/mesh_source.h>
#include <k3dsdk/module.h>
#include <k3dsdk/plugins.h>
#include <k3dsdk/transform.h>
namespace libk3dnurbs
{
/////////////////////////////////////////////////////////////////////////////
// nurbs_polygon_implementation
class nurbs_polygon_implementation :
public k3d::material_collection<k3d::mesh_source<k3d::persistent<k3d::object> > >
{
typedef k3d::material_collection<k3d::mesh_source<k3d::persistent<k3d::object> > > base;
public:
nurbs_polygon_implementation(k3d::idocument& Document) :
base(Document),
m_u_segments(k3d::init_name("u_segments") + k3d::init_description("Sides [integer]") + k3d::init_value(4) + k3d::init_constraint(k3d::constraint::minimum(1UL)) + k3d::init_precision(0) + k3d::init_step_increment(1) + k3d::init_units(typeid(k3d::measurement::scalar)) + k3d::init_document(Document)),
m_radius(k3d::init_name("radius") + k3d::init_description("Radius [number]") + k3d::init_value(5.0) + k3d::init_precision(2) + k3d::init_step_increment(0.1) + k3d::init_units(typeid(k3d::measurement::distance)) + k3d::init_document(Document))
{
enable_serialization(k3d::persistence::proxy(m_u_segments));
enable_serialization(k3d::persistence::proxy(m_radius));
register_property(m_u_segments);
register_property(m_radius);
m_material.changed_signal().connect(SigC::slot(*this, &nurbs_polygon_implementation::on_reset_geometry));
m_u_segments.changed_signal().connect(SigC::slot(*this, &nurbs_polygon_implementation::on_reset_geometry));
m_radius.changed_signal().connect(SigC::slot(*this, &nurbs_polygon_implementation::on_reset_geometry));
m_output_mesh.need_data_signal().connect(SigC::slot(*this, &nurbs_polygon_implementation::on_create_geometry));
}
void on_reset_geometry()
{
m_output_mesh.reset();
}
k3d::mesh* on_create_geometry()
{
k3d::mesh* const mesh = new k3d::mesh();
k3d::nucurve_group* const nucurve_group = new k3d::nucurve_group();
k3d::nucurve* const nucurve = new k3d::nucurve();
mesh->nucurve_groups.push_back(nucurve_group);
nucurve_group->curves.push_back(nucurve);
nucurve_group->material = m_material.interface();
// Create a NURBS polygon ...
nucurve->order = 2;
// Get side number ...
const unsigned long u_segments = m_u_segments.property_value();
// Build knot vector ...
nucurve->knots.push_back(0);
for(unsigned long n = 0; n <= u_segments; ++n)
nucurve->knots.push_back(n);
nucurve->knots.push_back(u_segments);
// Build control vertices ...
const double radius = m_radius.property_value();
for(unsigned long n = 0; n != u_segments; ++n)
{
const double angle = k3d::pi_over_2() + k3d::pi_times_2() / static_cast<double>(u_segments) * static_cast<double>(n);
k3d::point* const new_point = new k3d::point(radius * cos(angle), radius * sin(angle), 0.0);
mesh->points.push_back(new_point);
nucurve->control_points.push_back(k3d::nucurve::control_point(new_point));
}
nucurve->control_points.push_back(k3d::nucurve::control_point(mesh->points.front()));
// Do some sanity-checking on ourselves ...
assert_warning(is_valid(*nucurve));
return mesh;
}
k3d::iplugin_factory& factory()
{
return get_factory();
}
static k3d::iplugin_factory& get_factory()
{
static k3d::plugin_factory<k3d::document_plugin<nurbs_polygon_implementation>, k3d::interface_list<k3d::imesh_source > > factory(
k3d::uuid(0x49796f52, 0x2e29f346, 0xbd47e3c9, 0xfb899a81),
"NurbsPolygon",
"Generates a NURBS polygon",
"Objects",
k3d::iplugin_factory::STABLE);
return factory;
}
private:
k3d_measurement_property(unsigned long, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::with_constraint) m_u_segments;
k3d_measurement_property(double, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::no_constraint) m_radius;
};
/////////////////////////////////////////////////////////////////////////////
// nurbs_polygon_factory
k3d::iplugin_factory& nurbs_polygon_factory()
{
return nurbs_polygon_implementation::get_factory();
}
} // namespace libk3dnurbs
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