Slicer now uses Mesh for Boundingbox, instead of Scenegraph

CMakeLists.txt

 include (plugin)
-openflipper_plugin (INSTALLDATA Icons)
+openflipper_plugin (INSTALLDATA Icons
+                     TYPES POLYMESH TRIANGLEMESH)

SlicePlugin.cc

@@ -46,6 +46,9 @@
 
 #include "OpenFlipper/BasePlugin/PluginFunctions.hh"
 #include <OpenFlipper/common/GlobalOptions.hh>
+#include <ObjectTypes/PolyMesh/PolyMesh.hh>
+#include <ObjectTypes/TriangleMesh/TriangleMesh.hh>
+#include <MeshTools/MeshInfoT.hh>
 
 SlicePlugin::SlicePlugin() :
         tool_(nullptr),
@@ -177,13 +180,24 @@ void SlicePlugin::getBoundingBox(ACG::Vec3d& bbmin, ACG::Vec3d& bbmax){
   else
     restriction = PluginFunctions::ALL_OBJECTS;
 
-  for ( PluginFunctions::ObjectIterator o_it(restriction,DataType(DATA_ALL)) ;
+  for ( PluginFunctions::ObjectIterator o_it(restriction,DataType(DATA_TRIANGLE_MESH | DATA_POLY_MESH));
                                         o_it != PluginFunctions::objectsEnd(); ++o_it)  {
     // get scene size
     ACG::Vec3d cur_min;
     ACG::Vec3d cur_max;
     
-    o_it->getBoundingBox(cur_min, cur_max);
+    if (o_it->dataType(DATA_TRIANGLE_MESH)){
+      TriMesh* mesh = PluginFunctions::triMesh(*o_it);
+      MeshInfo::getBoundingBox(mesh, cur_min, cur_max);
+    }
+    else if (o_it->dataType(DATA_POLY_MESH)){
+      PolyMesh* mesh = PluginFunctions::polyMesh(*o_it);
+      MeshInfo::getBoundingBox(mesh, cur_min, cur_max);
+    }
+    else{
+      std::cerr << "Error: Object is not a mesh! This should not be possible." << std::endl;
+      continue;
+    }
     
     if (firstRound){
       bbmin = cur_min;
@@ -200,7 +214,7 @@ void SlicePlugin::getBoundingBox(ACG::Vec3d& bbmin, ACG::Vec3d& bbmax){
   }
 
   if ((bbmin[0] > bbmax[0]) || (bbmin[1] > bbmax[1]) || (bbmin[2] > bbmax[2]))
-    std::cerr << "Error while computing bounding box!";
+    std::cerr << "Error while computing bounding box! There is probably no Mesh selected!" << std::endl;
 
 }