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https://github.com/CHOMPStation2/CHOMPStation2.git
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37 lines
1.2 KiB
Plaintext
37 lines
1.2 KiB
Plaintext
/**
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* Attached to movable atoms with opacity. Listens to them move and updates their old and new turf loc's opacity accordingly.
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*/
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/datum/element/light_blocking
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element_flags = ELEMENT_DETACH_ON_HOST_DESTROY
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/datum/element/light_blocking/Attach(datum/target)
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. = ..()
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if(!ismovable(target))
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return ELEMENT_INCOMPATIBLE
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RegisterSignal(target, COMSIG_MOVABLE_MOVED, PROC_REF(on_target_move))
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var/atom/movable/movable_target = target
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if(isturf(movable_target.loc))
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var/turf/turf_loc = movable_target.loc
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turf_loc.add_opacity_source(target)
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/datum/element/light_blocking/Detach(atom/movable/target)
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. = ..()
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UnregisterSignal(target, list(COMSIG_MOVABLE_MOVED))
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var/atom/movable/movable_target = target
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if(isturf(movable_target.loc))
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var/turf/turf_loc = movable_target.loc
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turf_loc.remove_opacity_source(target)
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///Updates old and new turf loc opacities.
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/datum/element/light_blocking/proc/on_target_move(atom/movable/source, atom/OldLoc, Dir, Forced = FALSE)
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SIGNAL_HANDLER
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if(isturf(OldLoc))
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var/turf/old_turf = OldLoc
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old_turf.remove_opacity_source(source)
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if(isturf(source.loc))
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var/turf/new_turf = source.loc
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new_turf.add_opacity_source(source)
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