115 lines
2.4 KiB
GDScript
115 lines
2.4 KiB
GDScript
@tool
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extends Node2D
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class_name ScreenRatioRect
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# ===============================
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# Internal State
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# ===============================
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var _rect: Rect2 = Rect2()
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var _line_color: Color = Color(0.2, 0.9, 0.4, 0.9)
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var _line_width: float = 2.0
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var _target_node: Node2D = null
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var _target_screen_pos: Vector2 = Vector2.ZERO
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var _target_radius: float = 6.0
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var _target_color: Color = Color(1, 0.3, 0.3, 0.9)
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func _process(_delta: float) -> void:
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if Engine.is_editor_hint():
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return
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if _target_node:
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_update_target_screen_pos()
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queue_redraw()
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# ===============================
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# Public API
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# ===============================
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## 通过屏幕比例设置（0~1）
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func set_ratio(ratio: Vector2) -> void:
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var viewport_size := get_viewport_rect().size
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var size := viewport_size * ratio
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var pos := (viewport_size - size) * 0.5
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set_rect(Rect2(pos, size))
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## 直接设置屏幕空间 Rect
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func set_rect(rect: Rect2) -> void:
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_rect = rect
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queue_redraw()
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## 设置绘制风格
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func set_style(color: Color, width: float = 2.0) -> void:
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_line_color = color
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_line_width = width
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queue_redraw()
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## 设置追踪点
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func set_target_node(node: Node2D) -> void:
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_target_node = node
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_update_target_screen_pos()
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queue_redraw()
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## 更新targetnode在屏幕的位置
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func _update_target_screen_pos() -> void:
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if not _target_node:
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return
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_target_screen_pos = \
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_target_node.get_global_transform_with_canvas().get_origin()
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## 可选：快速隐藏 / 显示
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func clear() -> void:
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_target_node = null
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_rect = Rect2()
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queue_redraw()
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# ===============================
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# Draw
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# ===============================
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func _draw() -> void:
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if _rect.size == Vector2.ZERO:
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return
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var left := _rect.position.x
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var right := _rect.position.x + _rect.size.x
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var top := _rect.position.y
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var bottom := _rect.position.y + _rect.size.y
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var vp_size := get_viewport_rect().size
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# 上边线
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draw_line(
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Vector2(0, top),
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Vector2(vp_size.x, top),
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_line_color,
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_line_width
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)
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# 下边线
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draw_line(
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Vector2(0, bottom),
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Vector2(vp_size.x, bottom),
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_line_color,
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_line_width
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)
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# 左边线
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draw_line(
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Vector2(left, 0),
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Vector2(left, vp_size.y),
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_line_color,
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_line_width
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)
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# 右边线
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draw_line(
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Vector2(right, 0),
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Vector2(right, vp_size.y),
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_line_color,
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_line_width
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)
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##绘制角色位置锚点
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if _target_node:
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draw_circle(_target_screen_pos, _target_radius, _target_color)
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