31 lines
1.5 KiB
GDScript
31 lines
1.5 KiB
GDScript
extends RefCounted
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static func intercept(world_hit: Dictionary, start: Vector2, end: Vector2, mask: int, excluded: Array[RID], tree: SceneTree) -> Dictionary:
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var nearest := world_hit
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var distance := start.distance_squared_to(world_hit.position) if not world_hit.is_empty() else INF
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var segment := end-start
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var length_squared := segment.length_squared()
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if length_squared < 0.000001: return nearest
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for target in tree.get_nodes_in_group("shielded_combatants"):
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if not is_instance_valid(target) or target.is_queued_for_deletion(): continue
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if (int(target.collision_layer)&mask)==0 or target.get_rid() in excluded: continue
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if float(target.shields)<=0.0 or float(target.hull)<=0.0: continue
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if target.has_method("is_mini_boosting") and (bool(target.is_docked) or bool(target._is_destroyed)): continue
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var shield := target.get_node_or_null("ShieldVisual") as Node2D
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if shield == null: continue
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var radius := float(shield.shield_radius)*shield.global_transform.x.length()
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var offset := start-shield.global_position
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var b := offset.dot(segment)
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var c := offset.length_squared()-radius*radius
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var discriminant := b*b-length_squared*c
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if discriminant < 0.0: continue
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var t := (-b-sqrt(discriminant))/length_squared
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if c < 0.0: t = 0.0
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if t < 0.0 or t > 1.0: continue
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var point := start+segment*t
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var candidate := start.distance_squared_to(point)
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if candidate < distance:
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distance = candidate
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nearest = {"position":point,"collider":target,"normal":(point-shield.global_position).normalized(),"shield":true}
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return nearest
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