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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 CSG Operator K-3D object, which allows geometry to be rendered with boolean effects
\author Tim Shead (tshead@k-3d.com)
*/
#include <k3dsdk/module.h>
#include <k3dsdk/object.h>
#include <k3dsdk/persistence.h>
#include <k3dsdk/renderman.h>
#include <iostream>
namespace libk3drenderman
{
/////////////////////////////////////////////////////////////////////////////
// csg_operator_implementation
/// Allows geometry to be rendered with boolean effects
class csg_operator_implementation :
public k3d::persistent<k3d::object> ,
public k3d::ri::irenderable
{
typedef k3d::persistent<k3d::object> base;
public:
csg_operator_implementation(k3d::idocument& Document) :
base(Document),
m_type(k3d::init_name("type") + k3d::init_description("Operation [enumeration]") + k3d::init_enumeration(boolean_values()) + k3d::init_value(BOOLEAN_INTERSECTION) + k3d::init_document(Document)),
m_instance1(k3d::init_name("instance1") + k3d::init_description("Instance1 [object]") + k3d::init_object_value(0) + k3d::init_document(Document)),
m_instance2(k3d::init_name("instance2") + k3d::init_description("Instance2 [object]") + k3d::init_object_value(0) + k3d::init_document(Document))
{
enable_serialization(k3d::persistence::proxy(m_type));
enable_serialization(k3d::persistence::object_proxy(m_instance1));
enable_serialization(k3d::persistence::object_proxy(m_instance2));
register_property(m_type);
register_property(m_instance1);
register_property(m_instance2);
}
void renderman_pre_render(const k3d::ri::render_state&)
{
}
void renderman_render(const k3d::ri::render_state& State)
{
// We only generate RIB for the last sample ...
if(!k3d::ri::last_sample(State))
return;
k3d::ri::irenderable* const renderable1 = m_instance1.interface();
k3d::ri::irenderable* const renderable2 = m_instance2.interface();
if(!renderable1 || !renderable2)
return;
// Make sure we don't enter an infinite loop trying to render ourself ...
if(renderable1 == this || renderable2 == this)
{
std::cerr << error << factory().name() << " [" << name() << "] cannot instance itself" << std::endl;
return;
}
// Record the type of boolean ...
k3d::ri::render_state state(State);
state.render_context = k3d::ri::CSG_SOLID;
switch(m_type.property_value())
{
case BOOLEAN_INTERSECTION:
State.engine.RiSolidBegin(k3d::ri::RI_INTERSECTION());
renderable1->renderman_render(state);
renderable2->renderman_render(state);
break;
case BOOLEAN_UNION:
State.engine.RiSolidBegin(k3d::ri::RI_UNION());
renderable1->renderman_render(state);
renderable2->renderman_render(state);
break;
case BOOLEAN_DIFFERENCE:
State.engine.RiSolidBegin(k3d::ri::RI_DIFFERENCE());
renderable1->renderman_render(state);
renderable2->renderman_render(state);
break;
case BOOLEAN_REVERSE_DIFFERENCE:
State.engine.RiSolidBegin(k3d::ri::RI_DIFFERENCE());
renderable2->renderman_render(state);
renderable1->renderman_render(state);
break;
}
State.engine.RiSolidEnd();
}
k3d::iplugin_factory& factory()
{
return get_factory();
}
static k3d::iplugin_factory& get_factory()
{
static k3d::plugin_factory<k3d::document_plugin<csg_operator_implementation> >factory(
k3d::uuid(0x00000001, 0x00000000, 0x00000000, 0x0000000a),
"RenderManCSGOperator",
"",
"Objects",
k3d::iplugin_factory::STABLE);
return factory;
}
private:
typedef enum
{
BOOLEAN_INTERSECTION,
BOOLEAN_UNION,
BOOLEAN_DIFFERENCE,
BOOLEAN_REVERSE_DIFFERENCE
} boolean_t;
friend const k3d::ienumeration_property::values_t& boolean_values()
{
static k3d::ienumeration_property::values_t values;
if(values.empty())
{
values.push_back(k3d::ienumeration_property::value_t("Intersection", "intersection", "Render intersecting volumes"));
values.push_back(k3d::ienumeration_property::value_t("Union", "union", "Render the union of two volumnes"));
values.push_back(k3d::ienumeration_property::value_t("Difference", "difference", "Render the difference of two volumes"));
values.push_back(k3d::ienumeration_property::value_t("Reverse Difference", "reverse_difference", "Render the difference of two volumes"));
}
return values;
}
friend std::ostream& operator<<(std::ostream& Stream, const boolean_t& Value)
{
switch(Value)
{
case BOOLEAN_UNION:
Stream << "union";
break;
case BOOLEAN_INTERSECTION:
Stream << "intersection";
break;
case BOOLEAN_DIFFERENCE:
Stream << "difference";
break;
case BOOLEAN_REVERSE_DIFFERENCE:
Stream << "reverse_difference";
break;
}
return Stream;
}
friend std::istream& operator>>(std::istream& Stream, boolean_t& Value)
{
std::string text;
Stream >> text;
if(text == "union")
Value = BOOLEAN_UNION;
else if(text == "intersection")
Value = BOOLEAN_INTERSECTION;
else if(text == "difference")
Value = BOOLEAN_DIFFERENCE;
else if(text == "reverse_difference")
Value = BOOLEAN_REVERSE_DIFFERENCE;
else
std::cerr << __PRETTY_FUNCTION__ << ": unknown enumeration [" << text << "]"<< std::endl;
return Stream;
}
k3d_enumeration_property(boolean_t, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::no_constraint) m_type;
k3d_object_property(k3d::ri::irenderable, k3d::immutable_name, k3d::with_undo, k3d::local_storage) m_instance1;
k3d_object_property(k3d::ri::irenderable, k3d::immutable_name, k3d::with_undo, k3d::local_storage) m_instance2;
};
k3d::iplugin_factory& csg_operator_factory()
{
return csg_operator_implementation::get_factory();
}
} // namespace libk3drenderman
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