System: push

Push interaction system.

Entities that attempt to move into a tile occupied by a pushable entity will attempt to push that entity one tile further in the same direction, provided the destination tile is unblocked.

compute_destination(state, current_pos, next_pos)

Compute push destination given current and occupant next positions.

Parameters:

Name	Type	Description	Default
state	State	Current immutable state.	required
current_pos	Position	Position of the entity initiating the push.	required
next_pos	Position	Position of the entity being pushed.	required

push_system(state, ctx, eid, next_pos)

Attempt to push all pushable entities at next_pos.

Parameters:

Name	Type	Description	Default
state	State	Current immutable state.	required
ctx	StepContext	Current step context.	required
eid	EntityID	Entity initiating the push (must have a position).	required
next_pos	Position	Adjacent position the entity is trying to move into.	required

Returns:

Name	Type	Description
State	State	Updated state after applying any pushes.
StepContext	StepContext	Updated step context after applying any pushes.