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Brain damage tweaks #6199

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Brain damage tweaks #6199

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034cab8
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CheffieGithub Apr 17, 2026
83d6964
Merge branch 'main' of https://github.com/Monkestation/Vanderlin into…
CheffieGithub Apr 17, 2026
e95bb88
Increase threshold so oxy doesn't trigger, reduce special chance
CheffieGithub Apr 17, 2026
43e9e87
disable special
CheffieGithub Apr 17, 2026
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2 changes: 1 addition & 1 deletion code/__DEFINES/medical.dm
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Original file line number Diff line number Diff line change
Expand Up @@ -209,7 +209,7 @@

//~brain damage related defines
/// We need to take at least this much brainloss gained at once to roll for brain traumas, any less it won't roll
#define TRAUMA_ROLL_THRESHOLD 4.5
#define TRAUMA_ROLL_THRESHOLD 6
/// Brainloss caused by mildly low blood oxygenation
#define BRAIN_DAMAGE_LOW_OXYGENATION 1.5
/// Brainloss caused by lower than low blood oxygenation
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110 changes: 59 additions & 51 deletions code/modules/surgery/organs/internal/brain.dm
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Expand Up @@ -307,75 +307,83 @@
return FLOOR(damage / damage_threshold_value, 1)


/obj/item/organ/brain/check_damage_thresholds(mob/M)
/obj/item/organ/brain/check_damage_thresholds()
. = ..()
// if we're not more injured than before, return without gambling for a trauma
if(damage <= prev_damage)
return

var/damage_delta = damage - prev_damage

// Safeguard to prevent traumas from low damage
if((damage_delta >= TRAUMA_ROLL_THRESHOLD) && (damage >= BRAIN_DAMAGE_MILD))
var/is_boosted = FALSE
var/intelligence_modifier = (owner ? -(GET_MOB_ATTRIBUTE_VALUE(owner, STAT_INTELLIGENCE)-ATTRIBUTE_MIDDLING) : 0)
if(damage_delta >= TRAUMA_ROLL_THRESHOLD && damage >= BRAIN_DAMAGE_MILD)
// Base chance is the hit damage, plus intelligence mod; for every point of damage past the threshold the chance is increased by 1%
var/intelligence_modifier = (owner ? -(GET_MOB_ATTRIBUTE_VALUE(owner, STAT_INTELLIGENCE) - ATTRIBUTE_MIDDLING) : 0)
if(damage >= BRAIN_DAMAGE_SEVERE)
// Base chance is the hit damage, plus intelligence mod; for every point of damage past the threshold the chance is increased by 1%
if(prob((damage_delta+intelligence_modifier) * (1 + max(0, (damage - BRAIN_DAMAGE_SEVERE)/100))))
if(prob(20 + (is_boosted * 30) - (intelligence_modifier * 2)))
gain_trauma_type(BRAIN_TRAUMA_SPECIAL, is_boosted ? TRAUMA_RESILIENCE_SURGERY : null, natural_gain = TRUE)
else
gain_trauma_type(BRAIN_TRAUMA_SEVERE, natural_gain = TRUE)
else
// Base chance is the hit damage, plus intelligence mod; for every point of damage past the threshold the chance is increased by 1%
if(prob((damage_delta+intelligence_modifier) * (1 + max(0, (damage - BRAIN_DAMAGE_MILD)/100))))
gain_trauma_type(BRAIN_TRAUMA_MILD, natural_gain = TRUE)
if(owner)
if(damage >= BRAIN_DAMAGE_DEATH && prev_damage < BRAIN_DAMAGE_DEATH && (organ_flags & ORGAN_VITAL))
owner.death()
return
var/brain_message
if(prev_damage < BRAIN_DAMAGE_MILD && damage >= BRAIN_DAMAGE_MILD)
brain_message = span_warning("I feel lightheaded.")
else if(prev_damage < BRAIN_DAMAGE_SEVERE && damage >= BRAIN_DAMAGE_SEVERE)
brain_message = span_warning("I feel less in control of my thoughts.")
else if(prev_damage < (BRAIN_DAMAGE_DEATH - 20) && damage >= (BRAIN_DAMAGE_DEATH - 20) && damage < BRAIN_DAMAGE_DEATH)
brain_message = span_warning("I can feel my mind flickering on and off...")
if(.)
. += "\n[brain_message]"
else
return brain_message
if(prob((damage_delta + intelligence_modifier) * (1 + max(0, (damage - BRAIN_DAMAGE_SEVERE) / 100))))
gain_trauma_type(BRAIN_TRAUMA_SEVERE, natural_gain = TRUE)
else if(prob((damage_delta + intelligence_modifier) * (1 + max(0, (damage - BRAIN_DAMAGE_MILD)/100))))
gain_trauma_type(BRAIN_TRAUMA_MILD, natural_gain = TRUE)

if(damage >= BRAIN_DAMAGE_DEATH && prev_damage < BRAIN_DAMAGE_DEATH && (organ_flags & ORGAN_VITAL))
owner.death()
return

var/brain_message
if(prev_damage < BRAIN_DAMAGE_MILD && damage >= BRAIN_DAMAGE_MILD)
brain_message = span_warning("I feel lightheaded.")
else if(prev_damage < BRAIN_DAMAGE_SEVERE && damage >= BRAIN_DAMAGE_SEVERE)
brain_message = span_warning("I feel less in control of my thoughts.")
else if(prev_damage < (BRAIN_DAMAGE_DEATH - 20) && damage >= (BRAIN_DAMAGE_DEATH - 20) && damage < BRAIN_DAMAGE_DEATH)
brain_message = span_warning("I can feel my mind flickering on and off...")
if(.)
. += "\n[brain_message]"
else
return brain_message

/obj/item/organ/brain/applyOrganDamage(amount, maximum = maxHealth, silent = FALSE)
if(!amount) //Micro-optimization.
return

if(maximum < damage)
damage = maximum

if(damage < 0 && owner?.get_chem_effect(CE_BRAIN_REGEN))
damage *= 2

prev_damage = damage
damage = clamp(damage + amount, 0, maximum)

if(!owner)
return

var/mess = check_damage_thresholds(owner)
if(owner)
if(mess && !silent)
to_chat(owner, mess)
if(organ_flags & ORGAN_LIMB_SUPPORTER)
var/obj/item/bodypart/affected = owner.get_bodypart(current_zone)
affected?.update_limb_efficiency()
if(amount >= 10)
var/damage_side_effect = CEILING(amount/2, 1)
if(damage_side_effect >= 1)
//owner.flash_pain(damage_side_effect*4)
owner.adjust_eye_blur(damage_side_effect)
owner.adjust_confusion(damage_side_effect)
switch(rand(1,3))
if(1)
owner.stuttering += damage_side_effect
if(2)
owner.slurring += damage_side_effect
if(3)
owner.cultslurring += damage_side_effect
owner.CombatKnockdown(damage_side_effect*2, damage_side_effect, (damage_side_effect >= 5 ? damage_side_effect : null), damage_side_effect >= 5)
if(!is_failing())
REMOVE_TRAIT(owner, TRAIT_KNOCKEDOUT, CRIT_HEALTH_TRAIT)

if(mess && !silent)
to_chat(owner, mess)

if(organ_flags & ORGAN_LIMB_SUPPORTER)
var/obj/item/bodypart/affected = owner.get_bodypart(current_zone)
affected?.update_limb_efficiency()

if(amount >= 10)
var/damage_side_effect = CEILING(amount/2, 1)
if(damage_side_effect >= 1)
//owner.flash_pain(damage_side_effect*4)
owner.adjust_eye_blur(damage_side_effect)
owner.adjust_confusion(damage_side_effect)
switch(rand(1,3))
if(1)
owner.stuttering += damage_side_effect
if(2)
owner.slurring += damage_side_effect
if(3)
owner.cultslurring += damage_side_effect
owner.CombatKnockdown(damage_side_effect*2, damage_side_effect, (damage_side_effect >= 5 ? damage_side_effect : null), damage_side_effect >= 5)

if(!is_failing())
REMOVE_TRAIT(owner, TRAIT_KNOCKEDOUT, CRIT_HEALTH_TRAIT)

if(damage >= 60)
owner.add_stress(/datum/stress_event/brain_damage)
else
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