Darwin Neuroevolution Framework
Public Member Functions | List of all members
car_track::CarTrack Class Reference

Domain: Car Track. More...

#include <domain.h>

Inheritance diagram for car_track::CarTrack:
darwin::Domain core::NonCopyable

Public Member Functions

size_t inputs () const override
 Number of inputs to a Brain.
 
size_t outputs () const override
 Number of outputs from a Brain.
 
bool evaluatePopulation (darwin::Population *population) const override
 Assigns fitness values to every genotype. More...
 
- Public Member Functions inherited from darwin::Domain
virtual unique_ptr< core::PropertySetcalibrateGenotype ([[maybe_unused]] const Genotype *genotype) const
 Optional: additional fitness metrics (normally not used in the population evaluation, ie a test set)
 

Detailed Description

Domain: Car Track.

Race around a procedurally generated track, using the car's sensors (camera, ...)

car_track_sandbox.png

Inputs

  1. Camera: the color (and optionally depth) channels from the drone's camera
  2. Touch sensor (optional)
  3. Compass (optional)
  4. Accelerometer (optional)

Outputs

Output Value
0 acceleration force (negative values result in reverse movement)
1 desired steering angle (-1.0 .. +1.0)

Member Function Documentation

◆ evaluatePopulation()

bool car_track::CarTrack::evaluatePopulation ( darwin::Population population) const
overridevirtual

Assigns fitness values to every genotype.

Having a good fitness function is a key part of evolutionary algorithms:

  • Perhaps obvious, the fitness value should accurately estimate the quality of a particular solution
  • A "smooth" distribution is preferable since it provides a gradient which can guide the incremental search in the solutions space. (ex. if most fitness values are 1.0 or 0.0 it's hard to know which genotypes are good candidates for reproduction)
Returns
true if the evolution goal was reached

Implements darwin::Domain.


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