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# GoldenSpiral Class Reference [Example scripts (models)]

Example: Golden spiral More...

List of all members.

## Public Member Functions

GoldenSpiral (const Options &opt)
Actual model.
GoldenSpiral (bool share, GoldenSpiral &p)
Constructor for cloning p.
virtual Spacecopy (bool share)
Copy during cloning.
virtual FloatVar cost (void) const
Cost function.
virtual void print (std::ostream &os) const
Print solution coordinates.

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 81 of file golden-spiral.cpp.

## Constructor & Destructor Documentation

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

Actual model.

Definition at line 87 of file golden-spiral.cpp.

 GoldenSpiral::GoldenSpiral ( bool share, GoldenSpiral & p )  [inline]

Constructor for cloning p.

Definition at line 103 of file golden-spiral.cpp.

## Member Function Documentation

 virtual Space* GoldenSpiral::copy ( bool share )  [inline, virtual]

Copy during cloning.

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

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

Cost function.

Definition at line 112 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 116 of file golden-spiral.cpp.

## Member Data Documentation

 FloatVarArray GoldenSpiral::f [protected]

The numbers.

Definition at line 84 of file golden-spiral.cpp.

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