#ifndef _RENDER_H_#define _RENDER_H_#include <GL/osmesa.h>#include <assert.h>#include "MatrixManager.h"#include "textures.h"const int AXES_WIDTH = 2;const int DISPLAY_NODE = 0;const int BLACK = 1;const int GRAY = 2;const int WHITE = 0;const int FIRST_COLOR = 3;const int NUM_COLORS = 64;const int MIN_TICK_DISTANCE = 40;const double MINISCULE = 1e-10;#ifndef max#define max(a,b) ((a < b) ? b : a)#endif#ifndef min#define min(a,b) ((a < b) ? a : b)#endifclass TDRender;class SpyRender;class Render {  friend TDRender;  friend SpyRender; public:    Render(int w, int h, int rank, double *data, int start_row, 	 int start_column, int nrows, int ncols, DistLayout *data_layout, 	 bool render_spy);  ~Render();    float* draw();   protected:  bool is_spy;  int nonzero, num_nonzeros;  int num_blocks;  int *blocks_data;  int r, nr, nc, sr, sc, lx, ly, data_nr, data_nc, num_procs;  int width, height, axes_length;  int lCols, lRows;  int image_info[4];  int valid;  int *valid_procs;  double minZ, maxZ;  double* data_buffer;  void* image_buffer;  GLfloat *depth_buffer, *send_depth;  GLuint tex_ids[11];  float *final_image;  unsigned char* send_buffer;  OSMesaContext ctx;  void axes(double x1, double y1, double z1,	    double x2, double y2, double z2); private:    void collect_images();  void line(double x1, double y1, double z1,	    double x2, double y2, double z2);  void num(int num, double x, double y, double z);  void single_num(int num, double x, double y, double z);	  void ticks(double x1, double y1, double z1, 	     double x2, double y2, double z2);  void ticks_help(double constant, double var1, double var2, 		  int first_tick, int last_tick, bool x_axis);  void perspective();  void initTexture();  void rectangle();  void reshape();  void send();  virtual void done_drawing();  virtual void coordinatesGL() = 0;  virtual void dataGL() = 0;  virtual void coordinates() = 0;  virtual bool draw_help(int offset) = 0;};#endif