MeshNodeT.hh

/*===========================================================================*\
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 *                              OpenFlipper                                  *
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/*===========================================================================*\
 *                                                                           *
 *   $Revision: 8548 $                                                       *
 *   $Author: moebius $                                                      *
 *   $Date: 2010-02-12 14:40:13 +0100 (Fr, 12. Feb 2010) $                   *
 *                                                                           *
\*===========================================================================*/




//=============================================================================
//
//  CLASS MeshNodeT
//
//=============================================================================

#ifndef ACG_MESHNODE_HH
#define ACG_MESHNODE_HH

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

#include "BaseNode.hh"
#include <vector>
#include <string>
#include "../ShaderUtils/GLSLShader.hh"


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


namespace ACG {
namespace SceneGraph {


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


template <class Mesh>
class MeshNodeT : public BaseNode
{

public:

  MeshNodeT(const Mesh&  _mesh,
            BaseNode*    _parent=0,
            std::string  _name="<MeshNode>");

  virtual ~MeshNodeT();


  ACG_CLASSNAME(MeshNode);


  DrawModes::DrawMode  availableDrawModes() const;
  void boundingBox(Vec3d& _bbMin, Vec3d& _bbMax);
  void draw(GLState& _state, DrawModes::DrawMode _drawMode);
  void pick(GLState& _state, PickTarget _target);


  const Mesh& mesh() const { return mesh_; }


  void update_geometry();
  virtual void update_topology();

  void setTextureMap( std::map< int, GLuint>* _map){ textureMap_ = _map; };

  void set_property_map( std::map< int, std::string>* _map){ propertyMap_ = _map; };

  void setHalfedgeTextcoordPropertyName( std::string _default_halfedge_textcoord_property )
    { default_halfedge_textcoord_property_ = _default_halfedge_textcoord_property; };

  void setIndexPropertyName( std::string _index_property_name) { indexPropertyName_ = _index_property_name; };

protected:


  // types
  enum FaceMode { FACE_NORMALS, FACE_COLORS, PER_VERTEX, FACE_NORMALS_COLORS, FACE_HALFEDGE_TEXTURED };

  // draw vertices
  void draw_vertices();
  // draw polygons. to be overridden by TriStripNodeT
  virtual void draw_faces(FaceMode _mode);

  // pick vertices
  void pick_vertices(GLState& _state, bool _front = false);
  // pick polygons. to be overridden by TriMeshNodeT
  void pick_faces(GLState& _state);
  // pick edges
  void pick_edges(GLState& _state, bool _front = false);
  // pick anything
  void pick_any(GLState& _state);

  // update pick buffer sizes
  void update_pick_buffers ();

  // opengl vertex array stuff
  enum ArrayType
  {
    NONE                    = 0,
    VERTEX_ARRAY            = 1,
    NORMAL_ARRAY            = 2,
    COLOR_ARRAY             = 4,
    TEXTURE_COORD_1D_ARRAY  = 8,
    TEXTURE_COORD_2D_ARRAY  = 16,
    TEXTURE_COORD_3D_ARRAY  = 32
  };

  // enable/disable vertex arrays according to the bits in _arrays
  void enable_arrays(unsigned int _arrays);



protected:

  // mesh reference
  const Mesh&  mesh_;

  // which arrays are currently enabled?
  unsigned int enabled_arrays_;

  // vertex buffer objects
  unsigned int  face_index_buffer_, vertex_buffer_, normal_buffer_;

  // index list for fast rendering (will be accessed by TriStripNodeT
  std::vector<unsigned int>  indices_;

private:

  bool vertexBufferInitialized_;
  bool normalBufferInitialized_;
  bool faceIndexBufferInitialized_;

  // Internal buffer used when rendering non float vertex coordinates
  std::vector< ACG::Vec3f > vertices_;

  // Internal buffer used when rendering non float normals
  std::vector< ACG::Vec3f > normals_;

  // Mapping of mesh face texture indices to gltexture id ( has to be provided externally )
  std::map< int, GLuint>* textureMap_;

  // Mapping of mesh face texture indices to coordinate property names ( has to be provided externally )
  std::map< int, std::string>* propertyMap_;

  // Property name of the per face texture coordinates
  std::string default_halfedge_textcoord_property_;

  // Property name of the per face texture index.
  std::string indexPropertyName_;

  // display Lists used for picking
  GLuint faceList_;
  GLuint vertexList_;
  GLuint edgeList_;
  GLuint anyList_;

  // do we need to update our display lists?
  bool updateFaceList_;
  bool updateVertexList_;
  bool updateEdgeList_;
  bool updateAnyList_;
  unsigned int faceBaseIndex_;
  unsigned int vertexBaseIndex_;
  unsigned int edgeBaseIndex_;
  unsigned int anyBaseIndex_;

  // buffers for draw arrays during picking
  std::vector< ACG::Vec3f > pickVertexBuf_;
  std::vector< ACG::Vec4uc > pickColorBuf_;

  // bounding box
  Vec3d bbMin_;
  Vec3d bbMax_;
};


//=============================================================================
} // namespace SceneGraph
} // namespace ACG
//=============================================================================
#if defined(INCLUDE_TEMPLATES) && !defined(ACG_MESHNODE_C)
#define ACG_MESHNODE_TEMPLATES
#include "MeshNodeT.cc"
#endif
//=============================================================================
#endif // ACG_MESHNODE_HH defined
//=============================================================================