/Users/barrand/private/dev/softinex/old/inexlib-1.2/inlib/inlib/sg/mtx_action

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// Copyright (C) 2010, Guy Barrand. All rights reserved.
// See the file inlib.license for terms.

#ifndef inlib_sg_mtx_action
#define inlib_sg_mtx_action

#include "win_action"

#include "../mat4f"

namespace inlib {
namespace sg {

class mtx_action : public win_action {
public:
  mtx_action(std::ostream& a_out,unsigned int a_ww,unsigned int a_wh)
  : win_action(a_out,a_ww,a_wh)
  ,m_cur(0)
  {
    m_projs.resize(5);
    m_models.resize(5);    
    m_projs[0].set_identity();
    m_models[0].set_identity();
    m_cur = 0;
  }
  virtual ~mtx_action(){}
protected:
  mtx_action(const inlib::sg::mtx_action& a_from)
  : win_action(a_from)
  {}
  inlib::sg::mtx_action& operator=(const inlib::sg::mtx_action& a_from){
    win_action::operator=(a_from);
    return *this;
  }
public:
  void push_matrices() {
    if((m_cur+1)>=(int)m_projs.size()) {
      m_projs.resize(m_projs.size()+5);
      m_models.resize(m_models.size()+5);    
    }
    m_cur++;
    m_projs[m_cur].set_matrix(m_projs[m_cur-1]);
    m_models[m_cur].set_matrix(m_models[m_cur-1]);    
  }

  //WARNING : in the three below methods, there is no
  //          protection against m_cur<0 being zero here.
  void pop_matrices() {m_cur--;}
  inlib::mat4f& projection_matrix() {return m_projs[m_cur];}
  inlib::mat4f& model_matrix() {return m_models[m_cur];}

  bool end() const {return m_cur==0?true:false;}

  void reset() {
    m_projs[0].set_identity();
    m_models[0].set_identity();
    m_cur = 0;
  }

private:
  std::vector<inlib::mat4f> m_projs;
  std::vector<inlib::mat4f> m_models;
  int m_cur;
};

}}

#endif