For each section, the peak strains of all separate skills
are combined into a single peak strain for the section.
The resulting partial rating of the beatmap is a weighted sum
of the combined peaks (higher peaks are weighted more).
Returns number
The combined star rating of the beatmap,
calculated using peak strains from all sections of the map.
For each section, the peak strains of all separate skills are combined into a single peak strain for the section. The resulting partial rating of the beatmap is a weighted sum of the combined peaks (higher peaks are weighted more).