text: #ifndef _BEZIER_H_
  #define _BEZIER_H_
  
  #include <stdio.h>
  #include <stdlib.h>
  
  #include "line_util.h"
  #include "file_parser.h"
  
  
  int draw_bezier_surface(vertex * vertices, patch * patches);
  int draw_bezier_surface(vertex * vertices, patch * patches, point pov);
  
  #endif
  