mql5/Experts/Examples/Math 3D/Math 3D.mq5

<EFBFBD><EFBFBD>//+------------------------------------------------------------------+

//|                                                      Math_3D.mq5 |

//|                             Copyright 2000-2025, MetaQuotes Ltd. |

//|                                             https://www.mql5.com |

//+------------------------------------------------------------------+

#include  "Functions.mqh"



#property optimization_chart_mode "3d,InpX,InpY"



//--- input parameters

sinput EnFunctionType InpFunction=Chomolungma;

input  double         InpX       =0.0;

input  double         InpY       =0.0;

//--- a pointer to the mathematical function

MathFunction ExtFunction;

//+------------------------------------------------------------------+

//| Expert initialization function                                   |

//+------------------------------------------------------------------+

int OnInit()

  {

//--- this EA is designed for optimization

   if(!MQLInfoInteger(MQL_OPTIMIZATION))

     {

      MessageBox("This EA is designed for 3D visualization of optimization results\r\n\r\nRun this EA in the Strategy Tester using the Math Calculations mode!",

                 "EA warning", 0x00000030);

      return(INIT_FAILED);

     }

//---

   return(INIT_SUCCEEDED);

  }

//+------------------------------------------------------------------+

//| TesterInit function                                              |

//+------------------------------------------------------------------+

int OnTesterInit()

  {

//--- get a pointer to a mathematical function by its type

   ExtFunction=GetMathFunction(InpFunction);

   Print(__FUNCTION__, ": ExtFunction=", ExtFunction);

//--- variables to get values during optimization

   double  x_cur, x_start, x_stop, x_step;

   double  y_cur, y_start, y_stop, y_step;

   bool    x_enable, y_enable;