Automatically limit mount speed based on player riding skill and location

This module mimics mounts that "change their appearance based on rider skill and location" without creating multiple (five) spells for every mount and hardcoding those in Azeroth Core spell_gen_mount() (how Invincible is implemented).

Approach used for this module has some minor issues:

• Speed buff text is not displayed in the UI;
• Transitioning into AREA_FLAG_NO_FLY_ZONE (i.e. Dalaran city) is not handled correctly: the debuff doesn't unmount you for some reason, although it does stop you from flying;

Still, it's good enough for me, and could be useful as a proof of concept.

Alternatively, see spell-id-ranges branch for a more traditional approach.

Setup

Checkout the module into modules server directory, and recompile the server.

You will need to add 5 invisible service spells which apply actual speed increase and flying auras, those are hardcoded at IDs 240001 (60%) - 240005 (310%).

Service spells are provided in included Spells.csv, import those into Spells.dbc.

Then, add actual mount summoning spell.

For the spell to work properly, it needs to have the following effects:

1. APPLY_AURA -> SPELL_AURA_MOUNTED -> NPC ID is passed via Misc Value A. (this activates the mount)
2. APPLY_AURA -> SPELL_AURA_DUMMY
3. SCRIPT_EFFECT

Module expects effects 2 and 3 (which normally do nothing) while effect 1 is needed to actually call in the mount. You can use base Invincible spell (72286) as an example.

Then, assign spell script to your mount spell:

insert into spell_script_names (spell_id, ScriptName) values (251003, 'spell_mount_autoselect');

Where 251003 is your custom mount spell. Example is, again, provided in Spell.csv.

If everything worked correctly, you should be able to summon the mount everywhere, ground-only where appropriate, or flying if allowed.