创建单例模式文件

  • 新建一个00_Global文件夹，保证一直都在最上

    • 创建一个GlobalLevelManager脚本文件

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      extends Node

      var current_tilemap_bounds: Array[Vector2]

      signal TileMapBoundsChanged(bounds: Array[Vector2])

      func ChangeTileMapBounds(bounds: Array[Vector2]) -> void:
      	current_tilemap_bounds = bounds
      	TileMapBoundsChanged.emit(bounds)

    • 添加到AutoLoad中

创建Camera2D的脚本

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class_name PlayerCamera extends Camera2D

func _ready() -> void:
	LevelManager.TileMapBoundsChanged.connect(UpdateLimits)
	UpdateLimits(LevelManager.current_tilemap_bounds)
	pass
	
func UpdateLimits(bounds: Array[Vector2]) -> void:
	if bounds == []:
		return
	limit_left  = int (bounds[0].x)
	limit_top = int (bounds[0].y)
	limit_right = int (bounds[1].x)
	limit_bottom = int (bounds[1].y)
	pass

为Grass-01创建脚本

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class_name LevelTileMap extends TileMapLayer

func _ready() -> void:
	LevelManager.ChangeTileMapBounds(GetTileMapBounds())
	pass
	
func GetTileMapBounds() -> Array[Vector2]:
	var bounds: Array[Vector2] = []
	bounds.append(
		Vector2(get_used_rect().position * rendering_quadrant_size)
	)
	bounds.append(
		Vector2(get_used_rect().end * rendering_quadrant_size)
	)
	return bounds

总结

  • 场景加载时会更新全局的bounds
  • LevelManager会更新数据并发送信号
  • camera2D接收到信号并更新限制

问题解决

  • 遇到问题camera与tilemap对不上，查到原因是tilemap位置偏差没有在原点