#ifndef HEIGHT_QUANTITY_HH
#define HEIGHT_QUANTITY_HH

/* An individual height quantity to render. */

#ifdef HAVE_CONFIG_H
#  include "config.h"
#endif

#include <string>
#include <boost/shared_array.hpp>
#include <boost/shared_ptr.hpp>
#ifdef HAVE_GL_GL_H
#  include <GL/gl.h>
#elif HAVE_OPENGL_GL_H
#  include <OpenGL/gl.h>
#endif
#include "sww_file.hh"

using boost::shared_array;
using boost::shared_ptr;
using std::string;

/* HeightQuantity instances cannot be shared amongst different
   AnugaVis instances. This shouldn't matter since AnugaVis'
   initialisation does SDL initialisation and that should only happen
   once.
*/

class HeightQuantity {
public:
  HeightQuantity(const string &name,
		 const GLdouble offset, GLdouble scale,
		 GLfloat red, GLfloat green, GLfloat blue);
  ~HeightQuantity(void);
  void draw(int frame);
  void set_SWWFile(const shared_ptr<SWWFile> &file);
  GLdouble offset;
  GLdouble scale;
  GLfloat red;
  GLfloat green;
  GLfloat blue;
private:
  void compile(int frame);
  string name;
  int frame_number; /* The most recently drawn frame (i.e., the one
		       cached in the display list. */
  bool dynamic;
  GLuint display_list;
  shared_array<float> points;
  shared_ptr<SWWFile> sww_file;
};

#endif