The GtkRadiant sources as originally released under the GPL license.

radiant/renderer.h

@@ -0,0 +1,199 @@
+/*
+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