40 lines
1.2 KiB
GDScript3
40 lines
1.2 KiB
GDScript3
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extends Area2D
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var velocity: Vector2 = Vector2.ZERO
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var rotation_speed: float = 0.0
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var shape_points: PackedVector2Array = PackedVector2Array()
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func _ready() -> void:
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randomize()
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add_to_group("asteroids")
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area_entered.connect(_on_area_entered)
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var point_count: int = 7
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for i in range(point_count):
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var angle: float = (float(i) / point_count) * TAU
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var radius: float = randf_range(14.0, 22.0)
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shape_points.append(Vector2(cos(angle), sin(angle)) * radius)
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queue_redraw()
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func _process(delta: float) -> void:
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# Deliberately no queue_redraw() here. position and rotation are node
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# TRANSFORM properties - Godot applies them when rendering, and the
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# polygon built in _ready() is in local space, so it never changes.
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# Redrawing each frame re-tessellated four antialiased polylines per
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# asteroid for an identical result; with ~150 asteroids on screen that
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# was the single largest source of stutter.
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position += velocity * delta
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rotation += rotation_speed * delta
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func _on_area_entered(area: Area2D) -> void:
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if area.is_in_group("player_ships"):
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AsteroidExplosionVFX.spawn(get_tree().root, position)
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queue_free()
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func _draw() -> void:
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NeonDraw.draw_glowing_polygon(self, shape_points, Color(0.65, 0.5, 0.35), 1.0)
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