This addon is a fork of WrongCthunPlanner, with some minor tweaks to update it for 1.15+, and re-design the UI a little bit. Written for <Captain Morgans Revenge> by Koobo.

The addon provides a top-down view of the Cthun fight, and lets you place players in your raid in positions around Cthun for pre-fight planning.

Why?

WrongCthunPlanner was built for the original Classic run, and doesn't handle 20 man raids well, and only supports an older version of the WoW API.
KoboCthunPlanner focuses on SOD, works in the latest client and has slightly better support for 20 mans.

I'll be adding some additional options / tweaks as this sees usage in game and I get a better idea of what's needed.

Usage

/kcp help Show ingame help
/kcp show Show the planner
/kcp hide Hide the planner
/kcp reset Reset position and scale of the planner
/kcp refresh Refresh positions
/kcp version Show current version

For Raid Leads and Assists:

/kcp marks Set raid target markers
/kcp check Check if all raiders have the addon installed

Changelog

v0.5

Fix raid markers so that players in each segment of the map are given the correct marker, instead of assigning them based on raid group. Raid markers are prioritised for melee, or the player closest to Cthun.

v0.4

Separate opacity slider for the backdrop.
Share/update button in the top-left corner (replaces /kcp share). Allows users to request a new update from the raid leader, and raid leaders to share the positions they've set.
Added minimap button.
Changed resize indicator to be a little bit more obvious.
Removed header text, was a little obtrusive.