/// <summary>
/// Calculates the length of the road for the given atom, taking its position and environment into account. This
/// method is invoked by each <see cref="RoadAtom"/> during its production, in order to find out its length.
/// </summary>
/// <returns>The road length.</returns>
/// <param name="currentAtom">Current atom.</param>
/// <param name="gen">City generator.</param>
public virtual float CalculateRoadLength(RoadAtom currentAtom, CityGenerator gen)
{
// Calculate how much the population density influences road length (the less population, the longer the road)
float populationLengthFactor = 1f - gen.DensityAt(currentAtom.Node.position);
// Calculate how much the slope of the road influences its length (the steeper, the shorter)
float elevationLengthFactor = Mathf.Abs(gen.ElevationAt(currentAtom.Node.position) -
gen.ElevationAt(currentAtom.Node.position + currentAtom.Forward));
elevationLengthFactor = 1f - Mathf.Clamp01(gen.slopeExaggeration * elevationLengthFactor);
// Multiply them to get the final length factor. Basically the elevation factor should only influence the
// population factor when the road is very steep, in other cases it should be close to 1.
float lengthFactor = populationLengthFactor * elevationLengthFactor;
// Calculate the road length
return gen.minimumRoadLength + lengthFactor * (gen.maximumRoadLength - gen.minimumRoadLength);
}
/// <summary>
/// The prober that probes for population density at the given position.
/// </summary>
/// <returns>The population density at the given position.</returns>
/// <param name="gen">City generator.</param>
/// <param name="position">Position.</param>
public static float DensityProber(CityGenerator gen, Vector3 position)
{
return gen.DensityAt(position);
}