PolyLineCollectionNodeT.hh 7.08 KB
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/*===========================================================================*\
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#ifndef POLYLINE_COLLECTION_NODE_T_HH
#define POLYLINE_COLLECTION_NODE_T_HH


//== INCLUDES =================================================================

#include <ACG/Scenegraph/BaseNode.hh>
#include <ACG/Scenegraph/DrawModes.hh>
#include <ACG/GL/VertexDeclaration.hh>
#include <ACG/GL/IRenderer.hh>
#include <ACG/GL/GLPrimitives.hh>
#include <ACG/GL/globjects.hh>
#include <ObjectTypes/PolyLine/PolyLineNodeT.hh>

//== FORWARDDECLARATIONS ======================================================

//== NAMESPACES ===============================================================

namespace ACG {
namespace SceneGraph {

//== CLASS DEFINITION =========================================================




/** \class PolyLineNodeT PolyLineCollectionNodeT.hh <ACG/.../PolyLineCollectionNodeT.hh>

    This Node provides support for rendering polyline collections.
*/

template <class PolyLineCollection>
class PolyLineCollectionNodeT : public BaseNode
{
public:

  // typedefs for easy access
  typedef typename PolyLineCollection::PolyLine::Point Point;

  /// Constructor
  PolyLineCollectionNodeT(PolyLineCollection& _pl, BaseNode* _parent = 0, std::string _name = "<PolyLineCollectionNode>");

  /// Destructor
  virtual ~PolyLineCollectionNodeT();

  PolyLineCollection& polyline_collection() { return polyline_collection_; }

  /// static name of this class
  ACG_CLASSNAME(PolyLineCollectionNodeT);

  /// return available draw modes
  DrawModes::DrawMode availableDrawModes() const;

  /// update bounding box
  void boundingBox(Vec3d& _bbMin, Vec3d& _bbMax);

  /// draw lines and normals
  void draw(GLState& /*_state*/,const DrawModes::DrawMode& _drawMode);

  /// picking
  void pick(GLState& _state, PickTarget _target);

  /** \brief Add the objects to the given renderer
    *
    * @param _renderer The renderer which will be used. Add your geometry into this class
    * @param _state    The current GL State when this object is called
    * @param _drawMode The active draw mode
    * @param _mat      Current material
    */
  void getRenderObjects(ACG::IRenderer* _renderer, ACG::GLState&  _state , const ACG::SceneGraph::DrawModes::DrawMode&  _drawMode , const ACG::SceneGraph::Material* _mat);

  /// Trigger an update of the vbo
  void update() { updateVBO_ = true; }
  void resetVBO() {offsets_.clear();}

private:

  /// Copy constructor (not used)
  PolyLineCollectionNodeT(const PolyLineCollectionNodeT& _rhs);

  /// Assignment operator (not used)
  PolyLineCollectionNodeT& operator=(const PolyLineCollectionNodeT& _rhs);

  /// Buffer organization
  ACG::VertexDeclaration vertexDecl_;       // layout without colors
  ACG::VertexDeclaration vertexDeclVColor_; // layout with vertex colors
  ACG::VertexDeclaration vertexDeclEColor_; // layout with edge colors

  /** \brief Trigger an update of the vbo
   *
   * If the polyLineCollection is changed, you have to call this function to update the buffers.
   *
   */
  void updateVBO();


  void pick_vertices(GLState& _state);
  void pick_edges(GLState& _state, unsigned int _offset = 0);

private:

  /// The associated poly line collection
  PolyLineCollection& polyline_collection_;

  /// VBO used to render the poly line
  GeometryBuffer vbo_;

  /// IBO used to render the poly line
  IndexBuffer ibo_;

  /// Flag to trigger update of vbo
  bool updateVBO_;

  /// Sphere for VertexSphere DrawMode
  GLSphere* sphere_;

  /// (Offset in vbo, Vertex count in vbo) for each poly line
  std::vector<std::pair<size_t, size_t> > offsets_;

  std::vector< PolyLineNodeT<typename PolyLineCollection::PolyLine>* > polylineNodes_;

  size_t total_vertex_count_;
  size_t total_segment_count_;
};


//=============================================================================
} // namespace SceneGraph
} // namespace ACG
//=============================================================================
#if defined(INCLUDE_TEMPLATES) && !defined(ACG_POLYLINECOLLECTIONNODET_C)
#define ACG_POLYLINECOLLECTIONNODET_TEMPLATES
#include "PolyLineCollectionNodeT.cc"
#endif


#endif // POLYLINE_COLLECTION_NODE_T_HH