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/*
Copyright (C) 2001-2006, William Joseph.
All Rights Reserved.
This file is part of GtkRadiant.
GtkRadiant 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.
GtkRadiant 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 GtkRadiant; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#if !defined(INCLUDED_RENDERER_H)
#define INCLUDED_RENDERER_H
#include "irender.h"
#include "renderable.h"
#include "iselection.h"
#include "cullable.h"
#include "scenelib.h"
#include "math/frustum.h"
#include <vector>
inline Cullable* Instance_getCullable(scene::Instance& instance)
{
return InstanceTypeCast<Cullable>::cast(instance);
}
inline Renderable* Instance_getRenderable(scene::Instance& instance)
{
return InstanceTypeCast<Renderable>::cast(instance);
}
inline VolumeIntersectionValue Cullable_testVisible(scene::Instance& instance, const VolumeTest& volume, VolumeIntersectionValue parentVisible)
{
if(parentVisible == c_volumePartial)
{
Cullable* cullable = Instance_getCullable(instance);
if(cullable != 0)
{
return cullable->intersectVolume(volume, instance.localToWorld());
}
}
return parentVisible;
}
template<typename _Walker>
class CullingWalker
{
const VolumeTest& m_volume;
const _Walker& m_walker;
public:
CullingWalker(const VolumeTest& volume, const _Walker& walker)
: m_volume(volume), m_walker(walker)
{
}
bool pre(const scene::Path& path, scene::Instance& instance, VolumeIntersectionValue parentVisible) const
{
VolumeIntersectionValue visible = Cullable_testVisible(instance, m_volume, parentVisible);
if(visible != c_volumeOutside)
{
return m_walker.pre(path, instance);
}
return true;
}
void post(const scene::Path& path, scene::Instance& instance, VolumeIntersectionValue parentVisible) const
{
return m_walker.post(path, instance);
}
};
template<typename Walker_>
class ForEachVisible : public scene::Graph::Walker
{
const VolumeTest& m_volume;
const Walker_& m_walker;
mutable std::vector<VolumeIntersectionValue> m_state;
public:
ForEachVisible(const VolumeTest& volume, const Walker_& walker)
: m_volume(volume), m_walker(walker)
{
m_state.push_back(c_volumePartial);
}
bool pre(const scene::Path& path, scene::Instance& instance) const
{
VolumeIntersectionValue visible = (path.top().get().visible()) ? m_state.back() : c_volumeOutside;
if(visible == c_volumePartial)
{
visible = m_volume.TestAABB(instance.worldAABB());
}
m_state.push_back(visible);
if(visible == c_volumeOutside)
{
return false;
}
else
{
return m_walker.pre(path, instance, m_state.back());
}
}
void post(const scene::Path& path, scene::Instance& instance) const
{
if(m_state.back() != c_volumeOutside)
{
m_walker.post(path, instance, m_state.back());
}
m_state.pop_back();
}
};
template<typename Functor>
inline void Scene_forEachVisible(scene::Graph& graph, const VolumeTest& volume, const Functor& functor)
{
graph.traverse(ForEachVisible< CullingWalker<Functor> >(volume, CullingWalker<Functor>(volume, functor)));
}
class RenderHighlighted
{
Renderer& m_renderer;
const VolumeTest& m_volume;
public:
RenderHighlighted(Renderer& renderer, const VolumeTest& volume)
: m_renderer(renderer), m_volume(volume)
{
}
void render(const Renderable& renderable) const
{
switch(m_renderer.getStyle())
{
case Renderer::eFullMaterials:
renderable.renderSolid(m_renderer, m_volume);
break;
case Renderer::eWireframeOnly:
renderable.renderWireframe(m_renderer, m_volume);
break;
}
}
typedef ConstMemberCaller1<RenderHighlighted, const Renderable&, &RenderHighlighted::render> RenderCaller;
bool pre(const scene::Path& path, scene::Instance& instance, VolumeIntersectionValue parentVisible) const
{
m_renderer.PushState();
if(Cullable_testVisible(instance, m_volume, parentVisible) != c_volumeOutside)
{
Renderable* renderable = Instance_getRenderable(instance);
if(renderable)
{
renderable->viewChanged();
}
Selectable* selectable = Instance_getSelectable(instance);
if(selectable != 0 && selectable->isSelected())
{
if(GlobalSelectionSystem().Mode() != SelectionSystem::eComponent)
{
m_renderer.Highlight(Renderer::eFace);
}
else if(renderable)
{
renderable->renderComponents(m_renderer, m_volume);
}
m_renderer.Highlight(Renderer::ePrimitive);
}
if(renderable)
{
render(*renderable);
}
}
return true;
}
void post(const scene::Path& path, scene::Instance& instance, VolumeIntersectionValue parentVisible) const
{
m_renderer.PopState();
}
};
inline void Scene_Render(Renderer& renderer, const VolumeTest& volume)
{
GlobalSceneGraph().traverse(ForEachVisible<RenderHighlighted>(volume, RenderHighlighted(renderer, volume)));
GlobalShaderCache().forEachRenderable(RenderHighlighted::RenderCaller(RenderHighlighted(renderer, volume)));
}
#endif