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// K-3D
// Copyright (c) 1995-2006, 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 <k3d-i18n-config.h>
#include <k3dsdk/basic_math.h>
#include <k3dsdk/document_plugin_factory.h>
#include <k3dsdk/icamera.h>
#include <k3dsdk/inetwork_render_frame.h>
#include <k3dsdk/iprojection.h>
#include <k3dsdk/istream_ri.h>
#include <k3dsdk/itexture_ri.h>
#include <k3dsdk/imatrix_source.h>
#include <k3dsdk/measurement.h>
#include <k3dsdk/node.h>
#include <k3dsdk/property.h>
#include <k3dsdk/renderable_ri.h>
#include <k3dsdk/resolutions.h>
#include <k3dsdk/types_ri.h>
#include <k3dsdk/vectors.h>
namespace libk3drenderman
{
/// Implements the ShadowMap plugin, which is used to generate RenderMan shadow maps for fast rendering
/////////////////////////////////////////////////////////////////////////////
// shadow_map
class shadow_map :
public k3d::node,
public k3d::ri::itexture
{
typedef k3d::node base;
public:
shadow_map(k3d::iplugin_factory& Factory, k3d::idocument& Document) :
base(Factory, Document),
m_camera(init_owner(*this) + init_name("camera") + init_label(_("Camera")) + init_description(_("Shadow Map Camera")) + init_value<k3d::icamera*>(0)),
m_create_shadow_map(init_owner(*this) + init_name("create") + init_label(_("create")) + init_description(_("Create shadow map during rendering")) + init_value(true)),
m_view_shadow_map(init_owner(*this) + init_name("view") + init_label(_("view")) + init_description(_("View shadow map creation during rendering")) + init_value(true)),
m_resolution(init_owner(*this) + init_name("resolution") + init_label(_("Resolution")) + init_description(_("Choose a predefined image resolution")) + init_enumeration(k3d::resolution_values()) + init_value(std::string(""))),
m_pixel_width(init_owner(*this) + init_name("pixel_width") + init_label(_("pixel_width")) + init_description(_("Output pixel width")) + init_value(256) + init_constraint(constraint::minimum<k3d::int32_t>(1)) + init_step_increment(1) + init_units(typeid(k3d::measurement::scalar))),
m_pixel_height(init_owner(*this) + init_name("pixel_height") + init_label(_("pixel_height")) + init_description(_("Output pixel height")) + init_value(256) + init_constraint(constraint::minimum<k3d::int32_t>(1)) + init_step_increment(1) + init_units(typeid(k3d::measurement::scalar))),
m_pixel_aspect_ratio(init_owner(*this) + init_name("pixel_aspect_ratio") + init_label(_("pixel_aspect_ratio")) + init_description(_("Output pixel aspect ratio")) + init_value(1.0) + init_constraint(constraint::minimum(std::numeric_limits<double>::epsilon())) + init_step_increment(0.01) + init_units(typeid(k3d::measurement::scalar)))
{
m_resolution.changed_signal().connect(sigc::mem_fun(*this, &shadow_map::on_resolution_changed));
}
void on_resolution_changed(k3d::iunknown*)
{
const std::string new_resolution = m_resolution.pipeline_value();
const k3d::resolutions_t& resolutions = k3d::resolutions();
for(k3d::resolutions_t::const_iterator resolution = resolutions.begin(); resolution != resolutions.end(); ++resolution)
{
if(resolution->name != new_resolution)
continue;
m_pixel_width.set_value(resolution->width);
m_pixel_height.set_value(resolution->height);
return;
}
assert_not_reached();
}
void setup_renderman_texture(k3d::inetwork_render_frame& Frame, k3d::ri::istream& Stream, k3d::ri::ishader_collection& Shaders)
{
m_shadow_map_path = k3d::filesystem::path();
if(!m_create_shadow_map.pipeline_value())
return;
k3d::icamera* const camera = m_camera.pipeline_value();
return_if_fail(camera);
Stream.RiFrameBegin(0);
m_shadow_map_path = Frame.add_file("shadowmap.z");
Stream.RiDisplayV(m_shadow_map_path.native_filesystem_string(), "shadow", k3d::ri::RI_Z());
if(m_view_shadow_map.pipeline_value())
Stream.RiDisplayV("+" + name(), "zframebuffer", k3d::ri::RI_Z());
Stream.RiFormat(m_pixel_width.pipeline_value(), m_pixel_height.pipeline_value(), 1);
Stream.RiPixelSamples(1, 1);
Stream.RiPixelFilter(k3d::ri::RI_BOX(), 1, 1);
k3d::ri::parameter_list hider_parameters;
hider_parameters.push_back(k3d::ri::parameter("depthfilter", k3d::ri::UNIFORM, 1, k3d::ri::string("midpoint")));
Stream.RiHiderV("hidden", hider_parameters);
// Setup up viewing transformations
Stream.RiComment("Setup shadowmap viewing transformations");
if(k3d::iperspective* const perspective = dynamic_cast<k3d::iperspective*>(&camera->projection()))
{
const double left = boost::any_cast<double>(k3d::property::pipeline_value(perspective->left()));
const double right = boost::any_cast<double>(k3d::property::pipeline_value(perspective->right()));
const double top = boost::any_cast<double>(k3d::property::pipeline_value(perspective->top()));
const double bottom = boost::any_cast<double>(k3d::property::pipeline_value(perspective->bottom()));
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()));
return_if_fail(near > 0);
Stream.RiProjectionV("perspective");
Stream.RiScreenWindow(left / near, right / near, bottom / near, top / near);
Stream.RiClipping(near, far);
}
else if(k3d::iorthographic* const orthographic = dynamic_cast<k3d::iorthographic*>(&camera->projection()))
{
const double left = boost::any_cast<double>(k3d::property::pipeline_value(orthographic->left()));
const double right = boost::any_cast<double>(k3d::property::pipeline_value(orthographic->right()));
const double top = boost::any_cast<double>(k3d::property::pipeline_value(orthographic->top()));
const double bottom = boost::any_cast<double>(k3d::property::pipeline_value(orthographic->bottom()));
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()));
return_if_fail(near > 0);
const k3d::matrix4 transform_matrix = boost::any_cast<k3d::matrix4>(k3d::property::pipeline_value(camera->transformation().matrix_source_output()));
const k3d::point3 world_position = transform_matrix * k3d::point3(0, 0, 0);
const k3d::point3 world_target = boost::any_cast<k3d::point3>(camera->world_target().property_internal_value());
const double distance = k3d::distance(world_position, world_target);
const double height = top - bottom;
return_if_fail(height);
const double aspect = (right - left) / height;
const double tan_fov = height * 0.5 / near;
const double size = distance * tan_fov;
Stream.RiProjectionV("orthographic");
Stream.RiScreenWindow(-size * aspect, size * aspect, -size, size);
Stream.RiClipping(near, far);
}
// Setup the camera viewing transform ...
const k3d::matrix4 transform_matrix = boost::any_cast<k3d::matrix4>(k3d::property::pipeline_value(camera->transformation().matrix_source_output()));
Stream.RiTransform(k3d::ri::convert(k3d::inverse(transform_matrix)));
Stream.RiWorldBegin();
// Render objects ...
k3d::ri::render_state state(Frame, Stream, Shaders, camera->projection(), k3d::ri::SHADOW_MAP, k3d::ri::sample_times_t(1, 0.0), 0, transform_matrix);
for(k3d::nodes_t::const_iterator node = document().nodes().collection().begin(); node != document().nodes().collection().end(); ++node)
{
if(k3d::ri::irenderable* const renderable = dynamic_cast<k3d::ri::irenderable*>(*node))
renderable->renderman_render(state);
}
Stream.RiWorldEnd();
Stream.RiFrameEnd();
}
const k3d::filesystem::path renderman_texture_path(const k3d::ri::render_state& State)
{
return m_shadow_map_path;
}
static k3d::iplugin_factory& get_factory()
{
static k3d::document_plugin_factory<shadow_map,
k3d::interface_list<k3d::ri::itexture> > factory(
k3d::uuid(0x9bce6e2b, 0x083c4353, 0x829052e9, 0xf98c7023),
"RenderManShadowMap",
_("A shadow_map source within the 3D workspace"),
"RenderMan",
k3d::iplugin_factory::STABLE);
return factory;
}
private:
k3d_data(k3d::icamera*, immutable_name, change_signal, with_undo, node_storage, no_constraint, node_property, node_serialization) m_camera;
k3d_data(bool, immutable_name, change_signal, with_undo, local_storage, no_constraint, writable_property, with_serialization) m_create_shadow_map;
k3d_data(bool, immutable_name, change_signal, with_undo, local_storage, no_constraint, writable_property, with_serialization) m_view_shadow_map;
k3d_data(std::string, immutable_name, change_signal, with_undo, local_storage, no_constraint, enumeration_property, with_serialization) m_resolution;
k3d_data(k3d::int32_t, immutable_name, change_signal, with_undo, local_storage, with_constraint, measurement_property, with_serialization) m_pixel_width;
k3d_data(k3d::int32_t, immutable_name, change_signal, with_undo, local_storage, with_constraint, measurement_property, with_serialization) m_pixel_height;
k3d_data(double, immutable_name, change_signal, with_undo, local_storage, with_constraint, measurement_property, with_serialization) m_pixel_aspect_ratio;
k3d::filesystem::path m_shadow_map_path;
};
/////////////////////////////////////////////////////////////////////////////
// shadow_map_factory
k3d::iplugin_factory& shadow_map_factory()
{
return shadow_map::get_factory();
}
} // namespace libk3drenderman
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