OBJNode.hh

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//=============================================================================
//
//  CLASS FastMesh
//
//=============================================================================


#ifndef ACG_OBJ_NODE_HH
#define ACG_OBJ_NODE_HH


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

#include "BaseNode.hh"
#include "DrawModes.hh"
#include "../Math/VectorT.hh"
#include <string>
#include <vector>


//== FORWARD DECLARATION ======================================================


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


namespace ACG {
namespace SceneGraph {


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


class ACGDLLEXPORT OBJNode : public BaseNode
{

public:

  OBJNode( BaseNode*         _parent=0,
           std::string       _name="<OBJNode>" )
    : BaseNode(_parent, _name)
  {}


  virtual ~OBJNode() {}


  ACG_CLASSNAME(OBJNode);


  DrawModes::DrawMode availableDrawModes() const;

  void boundingBox(Vec3d& _bbMin, Vec3d& _bbMax);

  void draw(GLState& _state, const DrawModes::DrawMode& _drawMode);

  void pick(GLState& _state, PickTarget _target);


  struct Face
  {
    Face(int _i0=-1, int _i1=-1, int _i2=-1,
         int _t0=-1, int _t1=-1, int _t2=-1)
      : i0(_i0), i1(_i1), i2(_i2),
        t0(_t0), t1(_t1), t2(_t2) {}
    int i0, i1, i2, t0, t1, t2;
  };


  size_t n_vertices() const { return vertices_.size(); }
  size_t n_faces()    const { return faces_.size(); }
  size_t n_normals()  const { return normals_.size(); }
  size_t n_texcoords()  const { return texCoords_.size(); }


  void clear()
  {
    vertices_.clear();
    faces_.clear();
    normals_.clear();
    texCoords_.clear();
  }


  size_t add_vertex(const Vec3f& _v)
  {
    vertices_.push_back(_v);
    return vertices_.size()-1;
  }


  size_t add_face(const Face& _f)
  {
    faces_.push_back(_f);
    return faces_.size()-1;
  }

  size_t add_face(unsigned int _i0,
                        unsigned int _i1,
                        unsigned int _i2)
  {
    faces_.push_back(Face(_i0, _i1, _i2));
    return faces_.size()-1;
  }


  Vec3f& vertex(unsigned int _i)
  {
    assert(_i < n_vertices());
    return vertices_[_i];
  }
  const Vec3f& vertex(unsigned int _i) const
  {
    assert(_i < n_vertices());
    return vertices_[_i];
  }


  const Face&  face(unsigned int _i) const
  {
    assert(_i < n_faces());
    return faces_[_i];
  }
  Face&  face(unsigned int _i)
  {
    assert(_i < n_faces());
    return faces_[_i];
  }


  const Vec3f& normal(unsigned int _i) const
  {
    assert(_i < n_normals());
    return normals_[_i];
  }
  Vec3f& normal(unsigned int _i)
  {
    assert(_i < n_normals());
    return normals_[_i];
  }


  bool read(const std::string& _filename);


  void update_face_normals();


private:

  void draw_obj() const;
  void draw_obj_tex() const;

  std::vector<Vec3f> vertices_;
  std::vector<Vec3f> normals_;
  std::vector<Vec2f> texCoords_;
  std::vector<Face>  faces_;
};


//=============================================================================
} // namespace SceneGraph
} // namespace ACG
//=============================================================================
#endif // ACG_OBJ_NODE_HH
//=============================================================================