Implement Dodge Rolling Action with Temporary Invulnerability ($338)

code/datums/actions/mobs/dodge_roll.dm

@@ -0,0 +1,51 @@
+/datum/action/cooldown/mob_cooldown/dodge_roll
+	name = "Dodge Roll"
+	button_icon = 'icons/mob/actions/actions_items.dmi'
+	button_icon_state = "sniper_zoom"
+	desc = "Perform a quick dodge roll in your facing direction. Grants complete invulnerability to damage during the roll."
+	cooldown_time = 3 SECONDS
+	/// Duration of invulnerability and rolling state
+	var/roll_duration = 0.8 SECONDS
+	/// Distance moved during roll
+	var/roll_distance = 3
+
+/datum/action/cooldown/mob_cooldown/dodge_roll/Activate(atom/target_atom)
+	var/mob/living/L = owner
+	if(!istype(L) || L.incapacitated())
+		return FALSE
+
+	perform_dodge_roll(L)
+	StartCooldown()
+	return TRUE
+
+/datum/action/cooldown/mob_cooldown/dodge_roll/proc/perform_dodge_roll(mob/living/user)
+	if(!user)
+		return
+
+	var/was_already_godmode = (user.status_flags & GODMODE) != 0
+
+	// Grant temporary invulnerability (no damage taken)
+	user.status_flags |= GODMODE
+	user.visible_message(
+		span_warning("[user] performs a nimble dodge roll!"),
+		span_notice("You perform a dodge roll, granting temporary invulnerability!")
+	)
+
+	// Animate spin / roll visual
+	animate(user, transform = turn(matrix(), 180), time = roll_duration / 2, loop = 1)
+	animate(transform = turn(matrix(), 360), time = roll_duration / 2)
+
+	// Move user forward in facing direction
+	for(var/i in 1 to roll_distance)
+		step(user, user.dir)
+		sleep(1)
+
+	// Remove invulnerability after roll finishes only if user was not originally in godmode
+	addtimer(CALLBACK(GLOBAL_PROC, /proc/end_dodge_invulnerability, user, was_already_godmode), roll_duration)
+
+/proc/end_dodge_invulnerability(mob/living/user, was_already_godmode = FALSE)
+	if(!user || QDELETED(user))
+		return
+	if(!was_already_godmode)
+		user.status_flags &= ~GODMODE
+	user.transform = matrix() // Reset transform matrix

html/changelogs/AutoChangeLog-MochiGem.yml

@@ -0,0 +1,4 @@
+author: "MochiGem"
+delete-after: True
+changes:
+  - rscadd: "Added Dodge Rolling action with temporary invulnerability and GODMODE state preservation."

tgstation.dme

@@ -943,6 +943,7 @@
 #include "code\datums\actions\mobs\assume_form.dm"
 #include "code\datums\actions\mobs\blood_warp.dm"
 #include "code\datums\actions\mobs\charge.dm"
+#include "code\datums\actions\mobs\dodge_roll.dm"
 #include "code\datums\actions\mobs\charge_apc.dm"
 #include "code\datums\actions\mobs\chase_target.dm"
 #include "code\datums\actions\mobs\conjure_foamwall.dm"