ENH: Add a render delegate for Scene Models.

This will be the main render delegate since only models are allowed to
be render and this one covers most cases.

VTKRendering/CMakeLists.txt

@@ -5,6 +5,7 @@ simmedtk_add_library(VTKRendering
     VTKPlaneRenderDelegate.cpp
     VTKSceneObjectDeformableRenderDelegate.cpp
     VTKStaticSceneObjectRenderDelegate.cpp
+    VTKSceneModelRenderDelegate.cpp
     InitVTKRendering.cpp
   PUBLIC_HEADERS
     VTKViewer.h

VTKRendering/VTKSceneModelRenderDelegate.cpp

+// This file is part of the SimMedTK project.
+// Copyright (c) Center for Modeling, Simulation, and Imaging in Medicine,
+//                        Rensselaer Polytechnic Institute
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+//---------------------------------------------------------------------------
+//
+// Authors:
+//
+// Contact:
+//---------------------------------------------------------------------------
+
+#include "Core/Model.h"
+#include "Core/Geometry.h"
+#include "SceneModels/StaticSceneObject.h"
+#include "VTKRendering/VTKRenderDelegate.h"
+#include "Geometry/PlaneModel.h"
+#include "Geometry/MeshModel.h"
+
+// VTK includes
+#include <vtkActor.h>
+
+class SceneModelRenderDelegate : public VTKRenderDelegate
+{
+public:
+    vtkActor *getActor() override;
+};
+
+vtkActor *SceneModelRenderDelegate::getActor()
+{
+    SceneObject* geom = this->getSourceGeometryAs<SceneObject>();
+    if (!geom)
+    {
+        return nullptr;
+    }
+
+    auto planeModel = std::dynamic_pointer_cast<PlaneModel>(geom->getVisualModel());
+
+    if(planeModel)
+    {
+        auto delegate = std::dynamic_pointer_cast<VTKRenderDelegate>(
+            planeModel->getPlaneModel()->getRenderDelegate());
+        if(!delegate)
+        {
+            return nullptr;
+        }
+        delegate->initDraw();
+        return delegate->getActor();
+    }
+
+    auto meshModel = std::dynamic_pointer_cast<MeshModel>(geom->getVisualModel());
+
+    if(meshModel)
+    {
+        auto delegate = std::dynamic_pointer_cast<VTKRenderDelegate>(
+            meshModel->getMesh()->getRenderDelegate());
+        if(!delegate)
+        {
+            return nullptr;
+        }
+        delegate->initDraw();
+        return delegate->getActor();
+    }
+    return nullptr;
+}
+
+RegisterFactoryClass(RenderDelegate,
+                     SceneModelRenderDelegate,
+                     RenderDelegate::RendererType::VTK)