78 lines
1.6 KiB
GDScript3
78 lines
1.6 KiB
GDScript3
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"""
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Author: Oussama BOUKHELF
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License: MIT
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Version: 0.1
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Email: o.boukhelf@gmail.com
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Description: Advanced 2D/3D Trail system.
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Note: This is a simple implementation, I will update it later on.
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"""
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extends Line2D
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export(bool) var emit := true
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export(float) var lifetime := 0.5
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export(float) var distance := 20.0
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export(int) var segments := 20
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var target
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var trail_points := []
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var offset := Vector2()
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class Point:
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var position := Vector2()
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var age := 0.0
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func _init(position :Vector2, age :float) -> void:
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self.position = position
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self.age = age
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func update(delta :float, points :Array) -> void:
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self.age -= delta
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if self.age <= 0:
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points.erase(self)
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func _ready():
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offset = position
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show_behind_parent = true
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target = get_parent()
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clear_points()
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set_as_toplevel(true)
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position = Vector2()
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func _emit():
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var _rotated_offset :Vector2 = offset.rotated(target.rotation)
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var _position :Vector2 = target.global_transform.origin + _rotated_offset
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var point = Point.new(_position, lifetime)
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if trail_points.size() < 1:
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trail_points.push_back(point)
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return
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if trail_points[-1].position.distance_squared_to(_position) > distance*distance:
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trail_points.push_back(point)
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update_points()
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func update_points() -> void:
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var delta = get_process_delta_time()
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if trail_points.size() > segments:
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trail_points.invert()
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trail_points.resize(segments)
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trail_points.invert()
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clear_points()
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for point in trail_points:
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point.update(delta, trail_points)
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# if point:
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add_point(point.position)
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func _process(delta):
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if emit:
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_emit()
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