[Feature] Allow mods to detect damage greater than the player's health.

[ThePython10110]

Problem

At the moment, there is no way for mods to detect whether damage is greater than the player's health.

2024-02-03 15:12:28: ACTION[Server]: singleplayer damaged by 43 hp at (-3,7.165,-22)
2024-02-03 15:12:28: [Server]: HP change: -20

The first line is logged by the engine and the second line is logged in a minetest.register_on_player_hpchange function. I've looked through the engine code and found that before running those functions, the new HP is limited to a minimum of 0 (thus limiting the hp_change to the player's current HP). This means that there is no way to tell the difference between fall damage from 27 meters and 60,000 meters.

The reason I noticed this is because of a mod I'm making that adds very powerful armor. With the armor, players don't take damage unless it's above a certain threshold. Unfortunately, this means that when a player's HP is below that threshold, the player literally can't take damage while wearing the armor.

Solutions

The HP change passed to minetest.register_on_player_hpchange functions should not be limited to the player's current health. It should be the same as the damage reported by the server.

Alternatives

Maybe adding a boolean argument to minetest.register_on_player_hpchange to decide whether the full or adjusted HP change should be used.

Additional context

No response