#ifndef _TD_RENDER_H_#define _TD_RENDER_H_#include "render.h"class SurfRender;class TDRender : public Render {  friend SurfRender; public:  TDRender(int w, int h, int rank, double *data, int nrows, 	   int ncols, DistLayout *data_layout, double angleX, 	   double angleZ, double camera_zoom); private:    void axes3D(int x1, int y1, int z1,	      int x2, int y2, int z2,	      int x3, int y3, int z3,	      bool ticks, bool numbers, int last_tick, int first_tick = 0);  void ticks3D(int x1, int y1, int z1,	       int x2, int y2, int z2,	       int x3, int y3, int z3,	       bool ticks, bool numbers, int last_tick, int first_tick);  void coordinates();  void coordinatesGL();  void dataGL();  void perspective();  virtual bool draw_help(int offset) = 0;  virtual void draw_surface(int rOffset, int cOffset) = 0;  double rotZ, rotX, zoom;};#endif