broken_seals/game/steering_ai_framework/Behaviors/GSAISeparation.gd

43 lines
1.4 KiB
GDScript

# Calculates an acceleration that repels the agent from its neighbors in the
# given `GSAIProximity`.
#
# The acceleration is an average based on all neighbors, multiplied by a
# strength decreasing by the inverse square law in relation to distance, and it
# accumulates.
class_name GSAISeparation
extends GSAIGroupBehavior
# The coefficient to calculate how fast the separation strength decays with distance.
var decay_coefficient := 1.0
var _acceleration: GSAITargetAcceleration
func _init(agent: GSAISteeringAgent, proximity: GSAIProximity).(agent, proximity) -> void:
pass
func _calculate_steering(acceleration: GSAITargetAcceleration) -> void:
acceleration.set_zero()
self._acceleration = acceleration
# warning-ignore:return_value_discarded
proximity._find_neighbors(_callback)
# Callback for the proximity to call when finding neighbors. Determines the amount of
# acceleration that `neighbor` imposes based on its distance from the owner agent.
# tags: virtual
func _report_neighbor(neighbor: GSAISteeringAgent) -> bool:
var to_agent := agent.position - neighbor.position
var distance_squared := to_agent.length_squared()
var acceleration_max := agent.linear_acceleration_max
var strength := decay_coefficient / distance_squared
if strength > acceleration_max:
strength = acceleration_max
_acceleration.linear += to_agent * (strength / sqrt(distance_squared))
return true