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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
\brief Implements the RenderManBackgroundPlane K-3D object, which renders a world-aligned plane, centered at the camera's position, with radius equal to the camera farplane
\author Tim Shead (tshead@k-3d.com)
*/
#include <k3dsdk/document_plugin_factory.h>
#include <k3d-i18n-config.h>
#include <k3dsdk/imaterial.h>
#include <k3dsdk/iprojection.h>
#include <k3dsdk/material_sink.h>
#include <k3dsdk/node.h>
#include <k3dsdk/property.h>
#include <k3dsdk/renderable_ri.h>
#include <k3dsdk/vectors.h>
#ifdef WIN32
#ifdef near
#undef near
#endif //near
#ifdef far
#undef far
#endif //far
#endif //WIN32
namespace
{
/////////////////////////////////////////////////////////////////////////////
// background_plane
class background_plane :
public k3d::material_sink<k3d::node >,
public k3d::ri::irenderable
{
typedef k3d::material_sink<k3d::node > base;
public:
background_plane(k3d::iplugin_factory& Factory, k3d::idocument& Document) :
base(Factory, Document),
m_distance(init_owner(*this) + init_name("distance") + init_label(_("distance")) + init_description(_("Distance")) + init_value(1.0) + init_constraint(k3d::data::constraint::minimum<double>(0.0, k3d::data::constraint::maximum<double>(1.0))))
{
}
void renderman_render(const k3d::ri::render_state& State)
{
// We never generate shadows ...
if(k3d::ri::SHADOW_MAP == State.render_context)
return;
// We only generate output for the last sample ...
if(!k3d::ri::last_sample(State))
return;
k3d::iperspective* const perspective = dynamic_cast<k3d::iperspective*>(&State.projection);
k3d::iorthographic* const orthographic = dynamic_cast<k3d::iorthographic*>(&State.projection);
if(!perspective && !orthographic)
{
k3d::log() << error << k3d_file_reference << ": unknown projection type" << std::endl;
return;
}
double left, right, top, bottom, plane;
if(perspective)
{
const double near = boost::any_cast<double>(k3d::property::pipeline_value(perspective->near()));
const double far = boost::any_cast<double>(k3d::property::pipeline_value(perspective->far()));
plane = k3d::mix(near, far, m_distance.pipeline_value());
left = plane * boost::any_cast<double>(k3d::property::pipeline_value(perspective->left()));
right = plane * boost::any_cast<double>(k3d::property::pipeline_value(perspective->right()));
top = plane * boost::any_cast<double>(k3d::property::pipeline_value(perspective->top()));
bottom = plane * boost::any_cast<double>(k3d::property::pipeline_value(perspective->bottom()));
}
if(orthographic)
{
const double near = boost::any_cast<double>(k3d::property::pipeline_value(orthographic->near()));
const double far = boost::any_cast<double>(k3d::property::pipeline_value(orthographic->far()));
plane = k3d::mix(near, far, m_distance.pipeline_value());
left = boost::any_cast<double>(k3d::property::pipeline_value(orthographic->left()));
right = boost::any_cast<double>(k3d::property::pipeline_value(orthographic->right()));
top = boost::any_cast<double>(k3d::property::pipeline_value(orthographic->top()));
bottom = boost::any_cast<double>(k3d::property::pipeline_value(orthographic->bottom()));
}
State.stream.RiAttributeBegin();
State.stream.RiAttributeV("identifier", k3d::ri::parameter_list(1, k3d::ri::parameter("name", k3d::ri::UNIFORM, 1, k3d::ri::string(name()))));
State.stream.RiIdentity();
State.stream.RiCoordSysTransform(k3d::ri::RI_CAMERA());
k3d::ri::setup_material(m_material.pipeline_value(), State);
// Draw a plane ...
k3d::ri::points points;
points.push_back(k3d::ri::point(k3d::point3(left, top, plane)));
points.push_back(k3d::ri::point(k3d::point3(right, top, plane)));
points.push_back(k3d::ri::point(k3d::point3(left, bottom, plane)));
points.push_back(k3d::ri::point(k3d::point3(right, bottom, plane)));
State.stream.RiPatchV("bilinear", k3d::ri::parameter_list(1, k3d::ri::parameter(k3d::ri::RI_P(), k3d::ri::VERTEX, 1, points)));
State.stream.RiAttributeEnd();
}
void renderman_render_complete(const k3d::ri::render_state& State)
{
}
static k3d::iplugin_factory& get_factory()
{
static k3d::document_plugin_factory<background_plane >factory(
k3d::uuid(0x80e1c8eb, 0x001d4342, 0xb401551d, 0xd5c45a3d),
"RenderManBackgroundPlane",
_("Places a shader on a bilinear patch, aligned with the farplane"),
"RenderMan",
k3d::iplugin_factory::STABLE);
return factory;
}
private:
k3d_data(double, immutable_name, change_signal, with_undo, local_storage, with_constraint, writable_property, with_serialization) m_distance;
};
} // namespace
namespace libk3drenderman
{
k3d::iplugin_factory& background_plane_factory()
{
return background_plane::get_factory();
}
} // namespace libk3drenderman
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