lerp method
Linearly interpolate between two Wildness themes.
Implementation
Wildness lerp(Wildness other, double t) {
return Wildness(
components: _lerpWildnessBase(components, other.components, t),
physics: t < 0.5 ? physics : other.physics,
resources: _lerpWildnessBase(resources, other.resources, t),
);
}