# GoldenSpiral Class Reference

[Example scripts (models)]

Example: Golden spiral More...

## Public Member Functions | |

GoldenSpiral (const Options &opt) | |

Actual model. | |

GoldenSpiral (GoldenSpiral &p) | |

Constructor for cloning p. | |

virtual Space * | copy (void) |

Copy during cloning. | |

virtual FloatVar | cost (void) const |

Cost function. | |

virtual void | print (std::ostream &os) const |

Print solution coordinates. | |

## Protected Attributes | |

FloatVarArray | f |

The numbers. |

## Detailed Description

Example: Golden spiral

The Golden Spiral is a logarithmic spiral whose growth factor is the golden ratio .

It is defined by the polar equation:

where

To get cartesian coordinates, it can be solved for and in terms of and . By setting , it yields to the equation:

with

The tuple is related to the position for and on the curve. and are positive numbers.

To get reasonable interval starting sizes, and are restricted to .

Definition at line 77 of file golden-spiral.cpp.

## Constructor & Destructor Documentation

GoldenSpiral::GoldenSpiral | ( | const Options & | opt |
) | ` [inline]` |

Actual model.

Definition at line 83 of file golden-spiral.cpp.

GoldenSpiral::GoldenSpiral | ( | GoldenSpiral & | p |
) | ` [inline]` |

Constructor for cloning *p*.

Definition at line 99 of file golden-spiral.cpp.

## Member Function Documentation

virtual Space* GoldenSpiral::copy | ( | void | ) | ` [inline, virtual]` |

Copy during cloning.

Definition at line 104 of file golden-spiral.cpp.

virtual FloatVar GoldenSpiral::cost | ( | void | ) | const` [inline, virtual]` |

Cost function.

Definition at line 108 of file golden-spiral.cpp.

virtual void GoldenSpiral::print | ( | std::ostream & | os |
) | const` [inline, virtual]` |

Print solution coordinates.

Reimplemented from Gecode::Driver::ScriptBase< BaseSpace >.

Definition at line 112 of file golden-spiral.cpp.

## Member Data Documentation

FloatVarArray GoldenSpiral::f` [protected]` |

The numbers.

Definition at line 80 of file golden-spiral.cpp.

The documentation for this class was generated from the following file:

- examples/golden-spiral.cpp