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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 shadow_map object, which is used to generate RenderMan shadow maps for fast rendering
\author Timothy M. Shead (tshead@k-3d.com)
*/
#include <k3dsdk/basic_math.h>
#include <k3dsdk/iprojection.h>
#include <k3dsdk/irender_farm.h>
#include <k3dsdk/iviewport_host.h>
#include <k3dsdk/renderman.h>
#include <k3dsdk/transformable.h>
#include <k3dsdk/object.h>
#include <k3dsdk/persistence.h>
#include <k3dsdk/measurement.h>
#include <k3dsdk/module.h>
#include <k3dsdk/renderman.h>
#include <k3dsdk/vectors.h>
#include <k3dsdk/viewport.h>
#include <sdpgl/sdpgl.h>
#ifdef WIN32
#ifdef near
#undef near
#endif //near
#ifdef far
#undef far
#endif //far
#endif //WIN32
namespace libk3drenderman
{
namespace detail
{
const unsigned long default_pixel_width = 256;
const unsigned long default_pixel_height = 256;
const double default_pixel_aspect_ratio = 1.0;
const double default_screen_aspect_ratio = default_pixel_aspect_ratio * static_cast<double>(default_pixel_width) / static_cast<double>(default_pixel_height);
} // namespace detail
/////////////////////////////////////////////////////////////////////////////
// shadow_map_implementation
class shadow_map_implementation :
public k3d::viewport::drawable<k3d::transformable<k3d::persistent<k3d::object> > >,
public k3d::iviewport_host,
public k3d::ri::itexture
{
typedef k3d::viewport::drawable<k3d::transformable<k3d::persistent<k3d::object> > > base;
public:
shadow_map_implementation(k3d::idocument& Document) :
base(Document),
m_create_shadow_map(k3d::init_name("create") + k3d::init_description("Create shadow map during rendering [boolean]") + k3d::init_value(true) + k3d::init_document(Document)),
m_view_shadow_map(k3d::init_name("view") + k3d::init_description("View shadow map creation during rendering [boolean]") + k3d::init_value(true) + k3d::init_document(Document)),
m_pixel_width(k3d::init_name("pixel_width") + k3d::init_description("Output pixel width [positive integer]") + k3d::init_value(detail::default_pixel_width) + k3d::init_document(Document) + k3d::init_constraint(k3d::constraint::minimum(1UL)) + k3d::init_precision(0) + k3d::init_step_increment(1) + k3d::init_units(typeid(k3d::measurement::scalar))),
m_pixel_height(k3d::init_name("pixel_height") + k3d::init_description("Output pixel height [positive integer]") + k3d::init_value(detail::default_pixel_height) + k3d::init_document(document()) + k3d::init_constraint(k3d::constraint::minimum(1UL)) + k3d::init_precision(0) + k3d::init_step_increment(1) + k3d::init_units(typeid(k3d::measurement::scalar))),
m_pixel_aspect_ratio(k3d::init_name("pixel_aspect_ratio") + k3d::init_description("Output pixel aspect ratio [positive real]") + k3d::init_value(detail::default_pixel_aspect_ratio) + k3d::init_document(document()) + k3d::init_constraint(k3d::constraint::minimum(std::numeric_limits<double>::epsilon())) + k3d::init_precision(2) + k3d::init_step_increment(0.01) + k3d::init_units(typeid(k3d::measurement::scalar))),
m_orthographic(k3d::init_name("orthographic") + k3d::init_description("Orthographic [boolean]") + k3d::init_value(false) + k3d::init_document(Document)),
m_left(k3d::init_name("left") + k3d::init_description("Left [number]") + k3d::init_value(-0.5 * detail::default_screen_aspect_ratio) + k3d::init_document(Document) + k3d::init_precision(2) + k3d::init_step_increment(0.01) + k3d::init_units(typeid(k3d::measurement::scalar))),
m_right(k3d::init_name("right") + k3d::init_description("Right [number]") + k3d::init_value(0.5 * detail::default_screen_aspect_ratio) + k3d::init_document(Document) + k3d::init_precision(2) + k3d::init_step_increment(0.01) + k3d::init_units(typeid(k3d::measurement::scalar))),
m_top(k3d::init_name("top") + k3d::init_description("Top [number]") + k3d::init_value(0.5) + k3d::init_document(Document) + k3d::init_precision(2) + k3d::init_step_increment(0.01) + k3d::init_units(typeid(k3d::measurement::scalar))),
m_bottom(k3d::init_name("bottom") + k3d::init_description("Bottom [number]") + k3d::init_value(-0.5) + k3d::init_document(Document) + k3d::init_precision(2) + k3d::init_step_increment(0.01) + k3d::init_units(typeid(k3d::measurement::scalar))),
m_near(k3d::init_name("near") + k3d::init_description("Near plane distance [number]") + k3d::init_value(1.0) + k3d::init_constraint(k3d::constraint::minimum(0.0)) + k3d::init_document(Document) + k3d::init_precision(1) + k3d::init_step_increment(0.1) + k3d::init_units(typeid(k3d::measurement::distance))),
m_far(k3d::init_name("far") + k3d::init_description("Far plane distance [number]") + k3d::init_value(1000.0) + k3d::init_constraint(k3d::constraint::minimum(0.0)) + k3d::init_document(Document) + k3d::init_precision(1) + k3d::init_step_increment(0.1) + k3d::init_units(typeid(k3d::measurement::distance))),
m_perspective_projection(m_left, m_right, m_top, m_bottom, m_near, m_far),
m_orthographic_projection(m_left, m_right, m_top, m_bottom, m_near, m_far)
{
enable_serialization(k3d::persistence::proxy(m_create_shadow_map));
enable_serialization(k3d::persistence::proxy(m_view_shadow_map));
enable_serialization(k3d::persistence::proxy(m_pixel_width));
enable_serialization(k3d::persistence::proxy(m_pixel_height));
enable_serialization(k3d::persistence::proxy(m_pixel_aspect_ratio));
enable_serialization(k3d::persistence::proxy(m_orthographic));
enable_serialization(k3d::persistence::proxy(m_left));
enable_serialization(k3d::persistence::proxy(m_right));
enable_serialization(k3d::persistence::proxy(m_top));
enable_serialization(k3d::persistence::proxy(m_bottom));
enable_serialization(k3d::persistence::proxy(m_near));
enable_serialization(k3d::persistence::proxy(m_far));
register_property(m_create_shadow_map);
register_property(m_view_shadow_map);
register_property(m_pixel_width);
register_property(m_pixel_height);
register_property(m_pixel_aspect_ratio);
register_property(m_orthographic);
register_property(m_left);
register_property(m_right);
register_property(m_top);
register_property(m_bottom);
register_property(m_near);
register_property(m_far);
m_orthographic.changed_signal().connect(SigC::slot(*this, &shadow_map_implementation::async_redraw_all));
m_left.changed_signal().connect(SigC::slot(*this, &shadow_map_implementation::async_redraw_all));
m_right.changed_signal().connect(SigC::slot(*this, &shadow_map_implementation::async_redraw_all));
m_top.changed_signal().connect(SigC::slot(*this, &shadow_map_implementation::async_redraw_all));
m_bottom.changed_signal().connect(SigC::slot(*this, &shadow_map_implementation::async_redraw_all));
m_near.changed_signal().connect(SigC::slot(*this, &shadow_map_implementation::async_redraw_all));
m_far.changed_signal().connect(SigC::slot(*this, &shadow_map_implementation::async_redraw_all));
m_input_matrix.changed_signal().connect(SigC::slot(*this, &shadow_map_implementation::async_redraw_all));
m_position.changed_signal().connect(SigC::slot(*this, &shadow_map_implementation::async_redraw_all));
m_orientation.changed_signal().connect(SigC::slot(*this, &shadow_map_implementation::async_redraw_all));
m_scale.changed_signal().connect(SigC::slot(*this, &shadow_map_implementation::async_redraw_all));
m_pixel_width.changed_signal().connect(SigC::slot(*this, &shadow_map_implementation::on_pixel_width_changed));
m_pixel_height.changed_signal().connect(SigC::slot(*this, &shadow_map_implementation::on_pixel_height_changed));
}
void constrain_screen_aspect_ratio(double& Ratio)
{
// Constrain the aspect ratio to match our output image
Ratio = static_cast<double>(m_pixel_width.property_value()) / static_cast<double>(m_pixel_height.property_value());
}
k3d::iprojection* projection()
{
if(m_orthographic.property_value())
return &m_orthographic_projection;
return &m_perspective_projection;
}
aspect_ratio_changed_signal_t& aspect_ratio_changed_signal()
{
return m_aspect_ratio_changed_signal;
}
void on_pixel_width_changed()
{
const unsigned long pixel_width = m_pixel_width.property_value();
const unsigned long pixel_height = m_pixel_height.property_value();
return_if_fail(pixel_height);
const double ratio = static_cast<double>(pixel_width) / static_cast<double>(pixel_height);
m_left.set_value(-0.5 * ratio * std::abs(m_top.value() - m_bottom.value()));
m_right.set_value(0.5 * ratio * std::abs(m_top.value() - m_bottom.value()));
m_aspect_ratio_changed_signal.emit();
}
void on_pixel_height_changed()
{
const unsigned long pixel_width = m_pixel_width.property_value();
const unsigned long pixel_height = m_pixel_height.property_value();
return_if_fail(pixel_width);
const double ratio = static_cast<double>(pixel_height) / static_cast<double>(pixel_width);
m_top.set_value(0.5 * ratio * std::abs(m_right.value() - m_left.value()));
m_bottom.set_value(-0.5 * ratio * std::abs(m_right.value() - m_left.value()));
m_aspect_ratio_changed_signal.emit();
}
void on_viewport_draw(const k3d::viewport::render_state& State)
{
glDisable(GL_LIGHTING);
glDisable(GL_TEXTURE_1D);
glDisable(GL_TEXTURE_2D);
glColor3d(0, 0, 0);
glLineWidth(1.0f);
glDisable(GL_LINE_STIPPLE);
draw();
}
void on_viewport_select(const k3d::viewport::render_state& State)
{
draw();
}
void draw()
{
glBegin(GL_LINES);
k3d::vector3 coords(0, 0, 0);
glVertex3d(coords[0] + 1.0, coords[1], coords[2]);
glVertex3d(coords[0] - 1.0, coords[1], coords[2]);
glVertex3d(coords[0], coords[1] + 1.0, coords[2]);
glVertex3d(coords[0], coords[1] - 1.0, coords[2]);
glVertex3d(coords[0], coords[1], coords[2] + 1.0);
glVertex3d(coords[0], coords[1], coords[2] - 1.0);
glVertex3d(coords[0] + 0.4, coords[1] + 0.4, coords[2] + 0.4);
glVertex3d(coords[0] - 0.4, coords[1] - 0.4, coords[2] - 0.4);
glVertex3d(coords[0] - 0.4, coords[1] + 0.4, coords[2] + 0.4);
glVertex3d(coords[0] + 0.4, coords[1] - 0.4, coords[2] - 0.4);
glVertex3d(coords[0] + 0.4, coords[1] + 0.4, coords[2] - 0.4);
glVertex3d(coords[0] - 0.4, coords[1] - 0.4, coords[2] + 0.4);
glVertex3d(coords[0] - 0.4, coords[1] + 0.4, coords[2] - 0.4);
glVertex3d(coords[0] + 0.4, coords[1] - 0.4, coords[2] + 0.4);
glEnd();
}
void setup_renderman_texture(k3d::irender_frame& Frame, k3d::ri::irender_engine& Engine)
{
// Unless shadow-map creation is enabled, we're done ...
if(!m_create_shadow_map.value())
{
m_shadow_map_path = boost::filesystem::path();
return;
}
Engine.RiFrameBegin(0);
m_shadow_map_path = Frame.add_output_file("shadowmap.z");
Engine.RiDisplayV(m_shadow_map_path.native_file_string(), "shadow", k3d::ri::RI_Z());
if(m_view_shadow_map.value())
Engine.RiDisplayV("+" + name(), "zframebuffer", k3d::ri::RI_Z());
Engine.RiFormat(m_pixel_width.property_value(), m_pixel_height.property_value(), 1);
Engine.RiPixelSamples(1, 1);
Engine.RiPixelFilter(k3d::ri::RI_BOX(), 1, 1);
k3d::ri::parameter_list hider_parameters;
hider_parameters.push_back(k3d::ri::parameter("depthfilter", k3d::ri::UNIFORM, k3d::ri::string("midpoint")));
Engine.RiHiderV("hidden", hider_parameters);
// Setup up viewing transformations
Engine.RiComment("Setup shadowmap viewing transformations");
if(m_orthographic.property_value())
{
Engine.RiProjectionV("orthographic");
Engine.RiScreenWindow(m_left.property_value(), m_right.property_value(), m_bottom.property_value(), m_top.property_value());
Engine.RiClipping(m_near.property_value(), m_far.property_value());
}
else
{
Engine.RiProjectionV("perspective");
Engine.RiScreenWindow(m_left.property_value(), m_right.property_value(), m_bottom.property_value(), m_top.property_value());
Engine.RiClipping(m_near.property_value(), m_far.property_value());
}
// Setup the camera viewing transform ...
Engine.RiTransform(k3d::ri::convert(matrix().Inverse()));
Engine.RiWorldBegin();
// Render objects ...
k3d::ri::render_state state(Frame, Engine, *projection(), k3d::ri::SHADOW_MAP, k3d::ri::sample_times_t(1, 0.0), 0, matrix());
for(k3d::objects_t::const_iterator object = document().objects().collection().begin(); object != document().objects().collection().end(); ++object)
{
k3d::ri::irenderable* const renderable = dynamic_cast<k3d::ri::irenderable*>(*object);
if(renderable)
renderable->renderman_render(state);
}
Engine.RiWorldEnd();
Engine.RiFrameEnd();
}
const boost::filesystem::path renderman_texture_path(const k3d::ri::render_state& State)
{
return m_shadow_map_path;
}
k3d::iplugin_factory& factory()
{
return get_factory();
}
static k3d::iplugin_factory& get_factory()
{
static k3d::plugin_factory<
k3d::document_plugin<shadow_map_implementation>,
k3d::interface_list<k3d::ri::itexture,
k3d::interface_list<k3d::itransform_source,
k3d::interface_list<k3d::itransform_sink > > > > factory(
k3d::uuid(0x9bce6e2b, 0x083c4353, 0x829052e9, 0xf98c7023),
"RenderManShadowMap",
"A shadow_map source within the 3D workspace",
"Objects",
k3d::iplugin_factory::STABLE);
return factory;
}
private:
k3d_data_property(bool, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::no_constraint) m_create_shadow_map;
k3d_data_property(bool, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::no_constraint) m_view_shadow_map;
k3d_measurement_property(unsigned long, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::with_constraint) m_pixel_width;
k3d_measurement_property(unsigned long, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::with_constraint) m_pixel_height;
k3d_measurement_property(double, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::with_constraint) m_pixel_aspect_ratio;
k3d_data_property(bool, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::no_constraint) m_orthographic;
k3d_measurement_property(double, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::no_constraint) m_left;
k3d_measurement_property(double, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::no_constraint) m_right;
k3d_measurement_property(double, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::no_constraint) m_top;
k3d_measurement_property(double, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::no_constraint) m_bottom;
k3d_measurement_property(double, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::with_constraint) m_near;
k3d_measurement_property(double, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::with_constraint) m_far;
class perspective_projection :
public k3d::iperspective
{
public:
perspective_projection(k3d::iproperty& Left, k3d::iproperty& Right, k3d::iproperty& Top, k3d::iproperty& Bottom, k3d::iproperty& Near, k3d::iproperty& Far) :
m_left(Left),
m_right(Right),
m_top(Top),
m_bottom(Bottom),
m_near(Near),
m_far(Far)
{
}
k3d::iproperty& left()
{
return m_left;
}
k3d::iproperty& right()
{
return m_right;
}
k3d::iproperty& top()
{
return m_top;
}
k3d::iproperty& bottom()
{
return m_bottom;
}
k3d::iproperty& near()
{
return m_near;
}
k3d::iproperty& far()
{
return m_far;
}
private:
k3d::iproperty& m_left;
k3d::iproperty& m_right;
k3d::iproperty& m_top;
k3d::iproperty& m_bottom;
k3d::iproperty& m_near;
k3d::iproperty& m_far;
};
class orthographic_projection :
public k3d::iorthographic
{
public:
orthographic_projection(k3d::iproperty& Left, k3d::iproperty& Right, k3d::iproperty& Top, k3d::iproperty& Bottom, k3d::iproperty& Near, k3d::iproperty& Far) :
m_left(Left),
m_right(Right),
m_top(Top),
m_bottom(Bottom),
m_near(Near),
m_far(Far)
{
}
k3d::iproperty& left()
{
return m_left;
}
k3d::iproperty& right()
{
return m_right;
}
k3d::iproperty& top()
{
return m_top;
}
k3d::iproperty& bottom()
{
return m_bottom;
}
k3d::iproperty& near()
{
return m_near;
}
k3d::iproperty& far()
{
return m_far;
}
private:
k3d::iproperty& m_left;
k3d::iproperty& m_right;
k3d::iproperty& m_top;
k3d::iproperty& m_bottom;
k3d::iproperty& m_near;
k3d::iproperty& m_far;
};
perspective_projection m_perspective_projection;
orthographic_projection m_orthographic_projection;
boost::filesystem::path m_shadow_map_path;
aspect_ratio_changed_signal_t m_aspect_ratio_changed_signal;
};
/////////////////////////////////////////////////////////////////////////////
// shadow_map_factory
k3d::iplugin_factory& shadow_map_factory()
{
return shadow_map_implementation::get_factory();
}
} // namespace libk3drenderman
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