[MIRROR] Training in heavy gravity gives you more experience points (#26920)

* Training in heavy gravity gives you more experience points (#81990)

## About The Pull Request

If you use exercise equipment in an area with unusually high gravity,
you will get tired faster but will also earn a greater amount of fitness
experience points.
As far as I am aware the only particularly reliable way for regular crew
to gain access to high gravity is the bone-crushing strength (and
radiation?) of the gravity generator, but you could also use
gravitational anomalies or gravitational holoparasites for this if they
are available.

Conversely, if you lift weights when there's no gravity it won't cost
you any stamina at all!

## Why It's Good For The Game

I'll be honest this is a largely pointless and trivial change which
interacts with a similarly useless system, but I thought it would be a
cute interaction.
Training by wearing heavily weighted clothing or in an area where
gravity is increased are _somewhat_ common tropes in fiction (I have no
idea if people do this in real life) and I think our players would
appreciate the incredibly niche circumstances where they can benefit
from this.

I also think if even one round features someone building a gym in the
gravity generator room and encouraging people to get buff while it
crushes them into paste then this was a good addition.

## Changelog

🆑
balance: If you work out under heavier-than-earth gravity, you will get
gains faster.
/🆑

* Training in heavy gravity gives you more experience points

---------

Co-authored-by: Jacquerel <hnevard@gmail.com>

code/game/objects/structures/gym/punching_bag.dm

@@ -44,17 +44,22 @@
 	flick("[icon_state]-punch", src)
 	playsound(loc, pick(hit_sounds), 25, TRUE, -1)
 
+	if(!iscarbon(user))
+		return
+
+	var/is_heavy_gravity = user.has_gravity() > STANDARD_GRAVITY
+
 	var/stamina_exhaustion = 3
 	if(ishuman(user))
 		var/mob/living/carbon/human/boxer = user
 		var/obj/item/clothing/gloves/boxing/boxing_gloves = boxer.get_item_by_slot(ITEM_SLOT_GLOVES)
 		if(istype(boxing_gloves))
 			stamina_exhaustion = 2
+	if (is_heavy_gravity)
+		stamina_exhaustion *= 1.5
 
-	if(!iscarbon(user))
-		return
 	user.adjustStaminaLoss(stamina_exhaustion)
-	user.mind?.adjust_experience(/datum/skill/fitness, 0.1)
+	user.mind?.adjust_experience(/datum/skill/fitness, is_heavy_gravity ? 0.2 : 0.1)
 	user.apply_status_effect(/datum/status_effect/exercised)
 
 /obj/structure/punching_bag/wrench_act_secondary(mob/living/user, obj/item/tool)

code/game/objects/structures/gym/weight_machine.dm

@@ -133,8 +133,9 @@
 		user.adjust_nutrition(-5) // feel the burn
 
 		if(iscarbon(user))
+			var/gravity_modifier = user.has_gravity() > STANDARD_GRAVITY ? 2 : 1
 			// remember the real xp gain is from sleeping after working out
-			user.mind.adjust_experience(/datum/skill/fitness, WORKOUT_XP)
+			user.mind.adjust_experience(/datum/skill/fitness, WORKOUT_XP * gravity_modifier)
 			user.apply_status_effect(/datum/status_effect/exercised, EXERCISE_STATUS_DURATION)
 
 	end_workout()
@@ -161,8 +162,13 @@
 
 	if(!iscarbon(user) || isnull(user.mind))
 		return TRUE
+
+	var/affected_gravity = user.has_gravity()
+	if (!affected_gravity)
+		return TRUE // No weight? I could do this all day
+	var/gravity_modifier = affected_gravity > STANDARD_GRAVITY ? 0.75 : 1
 	// the amount of workouts you can do before you hit stamcrit
-	var/workout_reps = total_workout_reps[user.mind.get_skill_level(/datum/skill/fitness)]
+	var/workout_reps = total_workout_reps[user.mind.get_skill_level(/datum/skill/fitness)] * gravity_modifier
 	// total stamina drain of 1 workout calculated based on the workout length
 	var/stamina_exhaustion = FLOOR(user.maxHealth / workout_reps / WORKOUT_LENGTH, 0.1)
 	user.adjustStaminaLoss(stamina_exhaustion * seconds_per_tick)