What is this?

This is an alternate difficulty calculator for osu! maps. It is meant to work as a companion application for players that might want to see a (hopefully) more accurate representation of a map's difficulty, as the one currently in the game has some oversights (some discussion here).

Screenshots

Features

• Calculates difficulty of an osu! mapset based on what map is selected in-game, in the background
• Difficulty graphs (as well as a familiarly-scaled rating system)
  • currently, these graphs are difficulty (y) vs time (x)
• Automatically hides itself when in-game (stops analyzing when hidden or minimized)
• Logs all difficulty results to an easy-to-parse XML that may come in handy (and saves on calculations)

<root>
  <mapset title="Bios Epic Edition" artist="Hiroyuki Sawano feat. Mika Kobayashi" creator="xChippy">
    <map version="King" totalDiff="282.506503372079" jumpDiff="176.527853868931" streamDiff="48.2813679065478"
     burstDiff="36.0730535599447" coupletDiff="0" sliderDiff="21.624228036656" />
  </mapset>
  <mapset title="ChaiN De/structioN" artist="sakuzyo feat. Hatsune Miku" creator="Shiirn">
    <map version="Loneliness" totalDiff="265.876510272099" jumpDiff="118.104800312151" streamDiff="81.84861013557"
     burstDiff="46.6906321499775" coupletDiff="0" sliderDiff="19.2324676744006" />
  </mapset>
</root>

Difficulty calculation considerations

Currently considered features: jumps, streams, triplets, bursts, sliders

Planned considerations: patterns, couplets, weird timing, top ranked plays (ie a map where all the top plays are nomod vs doubletime, along with accuracy and combo. I think this is all available in the osu! api but I admit that I have not looked into it)

Where can I get a copy?

Grab the latest binary distribution from Downloads/Releases or compile from source

Reporting issues

• Create new issue in Issues section
• Provide a copy of any output logs (right now it's shown in the console)
• Provide a link to any maps that may cause issues
• Describe what the issue is, what problems it may be causing, etc

Development

• Clone latest commit, develop, test, submit pull request

How can I get my pull request accepted?

• Provide reasoning
• Demonstrate an improvement
  • for performance tweaks, show timing improvements (or provide reasoning)
  • for difficulty algorithm tweaks, give a few map examples of repo version rating versus your rating and some justification as to why this new rating is more appropriate

Who do I talk to?

• Repo owner (through github or message me on osu!, although I'm rarely online)