// K-3D
// Copyright (c) 1995-2008, 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 Timothy M. Shead (tshead@k-3d.com)
*/

#include "array_helpers.h"

#include <k3d-i18n-config.h>
#include <k3dsdk/document_plugin_factory.h>
#include <k3dsdk/imaterial.h>
#include <k3dsdk/imesh_painter_ri.h>
#include <k3dsdk/node.h>
#include <k3dsdk/renderable_ri.h>
#include <k3dsdk/selection.h>
#include <k3dsdk/sphere.h>

#include <boost/scoped_ptr.hpp>

namespace module
{

namespace renderman
{

namespace painters
{

/////////////////////////////////////////////////////////////////////////////
// sphere_painter

class sphere_painter :
	public k3d::node,
	public k3d::ri::imesh_painter
{
	typedef k3d::node base;

public:
	sphere_painter(k3d::iplugin_factory& Factory, k3d::idocument& Document) :
		base(Factory, Document)
	{
	}

	void paint_mesh(const k3d::mesh& Mesh, const k3d::ri::render_state& RenderState)
	{
		for(k3d::mesh::primitives_t::const_iterator primitive = Mesh.primitives.begin(); primitive != Mesh.primitives.end(); ++primitive)
		{
			boost::scoped_ptr<k3d::sphere::const_primitive> sphere(k3d::sphere::validate(Mesh, **primitive));
			if(!sphere)
				continue;

			for(k3d::uint_t i = 0; i != sphere->matrices.size(); ++i)
			{
				RenderState.stream.RiAttributeBegin();
				RenderState.stream.RiConcatTransform(k3d::ri::convert(sphere->matrices[i]));

				k3d::ri::setup_material(sphere->materials[i], RenderState);

				k3d::ri::parameter_list ri_parameters;

				array_copier ri_constant_attributes;
				ri_constant_attributes.add_arrays(sphere->constant_attributes);
				ri_constant_attributes.push_back(0);
				ri_constant_attributes.copy_to(k3d::ri::CONSTANT, ri_parameters);

				array_copier ri_uniform_attributes;
				ri_uniform_attributes.add_arrays(sphere->surface_attributes);
				ri_uniform_attributes.push_back(i);
				ri_uniform_attributes.copy_to(k3d::ri::UNIFORM, ri_parameters);

				array_copier ri_varying_attributes;
				ri_varying_attributes.add_arrays(sphere->parameter_attributes);
				for(k3d::uint_t j = 0; j != 4; ++j)
					ri_varying_attributes.push_back((i * 4) + j);
				ri_varying_attributes.copy_to(k3d::ri::VARYING, ri_parameters);
				
				RenderState.stream.RiSphereV(
					sphere->radii[i],
					std::max(-sphere->radii[i], sphere->radii[i] * sphere->z_min[i]),
					std::min(sphere->radii[i], sphere->radii[i] * sphere->z_max[i]),
					k3d::degrees(sphere->sweep_angles[i]),
					ri_parameters);

				RenderState.stream.RiAttributeEnd();
			}
		}
	}

	void paint_complete(const k3d::mesh& Mesh, const k3d::ri::render_state& RenderState)
	{
	}

	static k3d::iplugin_factory& get_factory()
	{
		static k3d::document_plugin_factory<sphere_painter, k3d::interface_list<k3d::ri::imesh_painter > > factory(
			k3d::uuid(0xa07012c4, 0xce4b11f4, 0x92d5f48d, 0x8f3751c0),
			"RenderManSpherePainter",
			_("Renders sphere primitives"),
			"RenderMan Painter",
			k3d::iplugin_factory::STABLE);

		return factory;
	}
};

/////////////////////////////////////////////////////////////////////////////
// sphere_painter_factory

k3d::iplugin_factory& sphere_painter_factory()
{
	return sphere_painter::get_factory();
}

} // namespace painters

} // namespace renderman

} // namespace module

