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Adds a new element, Self-Knockback. (#47938)

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* Adds a new element, Self-Knockback.

* Squashes a potential edgecase runtime in projectile_selfknockback before it can even happen.

* Allows item_selfknockback to interact with dense turfs now.

* Made self-knockback utilize the Element Bespoke flag to allow custom force and speed values on attachment.

* fixes newline issue, adds a usage comment.

* fixes the newline issue in self-knockback for real this time, thanks TortoiseGit.

* i swear on god almighty if this doesn't fix the newline issue, i'll eat a shoe.

* Testing newline lint
This commit is contained in:
KomradeSpectre
2019-11-25 16:34:14 -05:00
committed by Emmett Gaines
parent f910ebad5d
commit db878e848b
4 changed files with 63 additions and 0 deletions
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60
code/datums/elements/selfknockback.dm Normal file
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/datum/element/selfknockback
element_flags = ELEMENT_BESPOKE
id_arg_index = 2
var/override_throw_val
var/override_speed_val
/* Adds the ability to put recoil on various things, throwing the user back proportional to the force and speed set.
Important note: Force/Throw_Amount, is how far you want to throw a user. By default, it is calculated based on damage below.
Speed_Amount, is a measure of how long it will take a user to get thrown to the target. By default, it is calculated by
clamping the Knockback_Force value below. */
/datum/element/selfknockback/Attach(datum/target, throw_amount, speed_amount)
. = ..()
if(isitem(target))
RegisterSignal(target, COMSIG_ITEM_AFTERATTACK, .proc/Item_SelfKnockback)
else if(isprojectile(target))
RegisterSignal(target, COMSIG_PROJECTILE_FIRE, .proc/Projectile_SelfKnockback)
else
return ELEMENT_INCOMPATIBLE
override_throw_val = throw_amount
override_speed_val = speed_amount
/datum/element/selfknockback/Detach(datum/source, force)
. = ..()
UnregisterSignal(source, list(COMSIG_ITEM_AFTERATTACK, COMSIG_PROJECTILE_FIRE))
/datum/element/selfknockback/proc/Get_Knockback_Force(default_force)
if(override_throw_val)
return override_throw_val
else
return default_force
/datum/element/selfknockback/proc/Get_Knockback_Speed(default_speed)
if(override_speed_val)
return override_speed_val
else
return default_speed
/datum/element/selfknockback/proc/Item_SelfKnockback(obj/item/I, atom/attacktarget, mob/usertarget, proximity_flag)
if(isturf(attacktarget) && !attacktarget.density)
return
if(proximity_flag || (get_dist(attacktarget, usertarget) <= I.reach))
var/knockback_force = Get_Knockback_Force(CLAMP(CEILING((I.force / 10), 1), 1, 5))
var/knockback_speed = Get_Knockback_Speed(CLAMP(knockback_force, 1, 5))
var/target_angle = Get_Angle(attacktarget, usertarget)
var/move_target = get_ranged_target_turf(usertarget, angle2dir(target_angle), knockback_force)
usertarget.throw_at(move_target, knockback_force, knockback_speed)
usertarget.visible_message("<span class='warning'>[usertarget] gets thrown back by the force of \the [I] impacting \the [attacktarget]!</span>", "<span class='warning'>The force of \the [I] impacting \the [attacktarget] sends you flying!</span>")
/datum/element/selfknockback/proc/Projectile_SelfKnockback(obj/projectile/P)
if(!P.firer)
return
var/knockback_force = Get_Knockback_Force(CLAMP(CEILING((P.damage / 10), 1), 1, 5))
var/knockback_speed = Get_Knockback_Speed(CLAMP(knockback_force, 1, 5))
var/atom/movable/knockback_target = P.firer
var/move_target = get_edge_target_turf(knockback_target, angle2dir(P.original_angle+180))
knockback_target.throw_at(move_target, knockback_force, knockback_speed)