＜Godot＞工厂游戏练习笔记一＜2D网格地图＞

1、编写网格数据类，用于存储网格地图中的数据：

python 复制代码

class_name Grid2D_Data

## 单元格数据,传入一个场景
var data:Resource:
	set(val):
		if val != null:
			data = val
## 网格长宽
var grid_size:Vector2i = Vector2i(10,10):
	set(val):
		if val:
			grid_size = val
## 网格数据
var map_data = []
## 初始化
func _init(p_data:Resource,p_grid_size:Vector2i):
	data = p_data
	grid_size = p_grid_size
	pass
## 创建网格数组
func create(parent:Node2D):
	for x in grid_size.x:
		var array = []
		for y in grid_size.y:
			var grid_data = data.instantiate()
			grid_data.grid_position = Vector2i(x,y)
			grid_data.name = "grid%s_%s" % [x,y]
			parent.add_child(grid_data)
			array.append(grid_data)
		map_data.append(array)
	pass
## 获取指定网格坐标数组
func get_cell(pos:Vector2i):
	if pos <= grid_size and pos >= Vector2i(0,0):
		return map_data[pos.x][pos.y]
	else :
		return null
	pass
## 获取指定列网格
func get_row(x:int):
	return map_data[x]
	pass
## 打印网格内容
func show():
	for x in map_data.size():
		print(get_row(x))
	pass

## 更改指定网格内容
func set_cell(pos:Vector2i,p_data:Node2D):
	if pos <= grid_size and pos >= Vector2i(0,0):
		map_data[pos.x][pos.y] = p_data
	pass

## 获取网格指定角度数据
func get_cell_direction(pos:Vector2i,degress:int):
	if degress == 0:
		return get_cell(pos+Vector2i(0,-1))
	elif degress == 90:
		return get_cell(pos+Vector2i(1,0))
	elif degress == 180:
		return get_cell(pos+Vector2i(0,1))
	elif degress == 270:
		return get_cell(pos+Vector2i(-1,0))	
	else:
		return null
	pass

2、编写单元格数据类型基类，所有单元格场景需要继承该类

python 复制代码

class_name Grid_Data ##网格数据基类
extends Node2D

var grid_position:Vector2i ##网格坐标
var degress:int ##角度
var type:String ##网格类型

var sprite:Sprite2D ##图片
## 修改图片大小
func _set_scale(target:Vector2i):
	var sh = sprite.texture.get_height()
	var sw = sprite.texture.get_width()
	var scale_x = target.x / (sh*1.0)
	var scale_y = target.y / (sw*1.0)
	self.scale = Vector2(scale_x,scale_y)
	pass

3、新建一个地图瓦块场景，用于初始化地图

4、添加脚本，继承基类，初始化地图数据

python 复制代码

extends Grid_Data

func _ready():
	type = "map"
	sprite = $sprite
	pass

5、新建一个地图场景map，用于初始化地图，调整图片坐标等

6、在场景map下绑定脚本，初始化地图

python 复制代码

extends Node2D

@export var grid_size:Vector2i=Vector2i(10,10): ##网格大小
	set(val):
		if val:
			grid_size = val

@export var cell_size:Vector2i=Vector2i(64,64): ##单元格大小
	set(val):
		if val:
			cell_size = val

var Grid_Map = preload("res://scenes/map/grid_map.tscn")

var map_data:Grid2D_Data ##网格数据实例		
			
func _ready():
	map_data = Grid2D_Data.new(Grid_Map,grid_size)
	map_data.create(self)
	for x in grid_size.x:
		for y in grid_size.y:
			var grid = map_data.get_cell(Vector2i(x,y))
			var sprite = grid.sprite
			grid._set_scale(cell_size)
			sprite.position = Vector2i((x+0.5)*cell_size.x,(y+0.5)*cell_size.y)
	pass

7、后续操作通过点击对应的网格，即可以获取到对应网格绑定的坐标，通过坐标获取上下左右的相对关系。