tonytins/citylimits-next
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change chunk render distance based on zoom level

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This commit is contained in:
Antti Hakkarainen 2023-02-13 16:53:44 +02:00
parent 0109934933
commit 675b451723
1 changed files with 22 additions and 4 deletions
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26
scripts/ChunkHandler.gd
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@ -11,25 +11,26 @@ extends Node2D
var chunks:Dictionary = {}
var unready_chunks:Dictionary = {}
var chunk_amount = 16
var window_width = DisplayServer.window_get_size(0).x
var distance = abs((window_width/(Globals.CHUNK_SIZE.x*Globals.TILE_SIZE_X)) / 2 +1 )
func _init() -> void:
self.name = "ChunkHandler"
func _process(_delta):
update_chunks()
clean_up_chunks()
reset_chunks()
func _ready():
#thread = Thread.new()
#print(distance)
pass
func add_chunk(x:int, y:int) -> void:
var key = str(y) + "," + str(x)
if chunks.has(key):
@ -37,6 +38,7 @@ func add_chunk(x:int, y:int) -> void:
load_chunk(x, y, key)
func clean_up_chunks():
for key in chunks:
var chunk = chunks[key]
@ -44,9 +46,19 @@ func clean_up_chunks():
chunk.queue_free()
chunks.erase(key)
func clear_chunk(pos:Vector2i) -> void:
self.chunks[pos.y][pos.x].clear()
func correction_factor(distance) -> float:
if Globals.CAMERA_ZOOM_LEVEL < 0.6:
return distance * 2.0
elif Globals.CAMERA_ZOOM_LEVEL > 1.0:
return distance
else:
return distance * ( 1 + 2 * (1-Globals.CAMERA_ZOOM_LEVEL) )
func get_chunk(x:int, y:int):
var key = str(y) + "," + str(x)
if self.chunks.has(key):
@ -54,6 +66,7 @@ func get_chunk(x:int, y:int):
return null
func load_chunk(x:int, y:int, key:String):
var chunk = Chunk.new(x,y)
self.add_child(chunk)
@ -66,13 +79,18 @@ func reset_chunks():
for key in chunks:
chunks[key].should_remove = true
func update_chunks():
var p_x = int(Globals.CAMERA_POSITION.x- Globals.CHUNK_SIZE.x) / Globals.TILE_SIZE_X / Globals.CHUNK_SIZE.x
var p_y = int(Globals.CAMERA_POSITION.y- Globals.CHUNK_SIZE.y) / Globals.TILE_SIZE_Y / Globals.CHUNK_SIZE.y
# When updating chunks, adjust chunk rendering distance
# based on current zoom level.
var zoom_corrected = correction_factor(distance)
for y in Globals.map_size/Globals.CHUNK_SIZE.y:
for x in Globals.map_size/Globals.CHUNK_SIZE.x:
if (abs(x - p_x) <= distance && abs(y - p_y) <= distance):
if (abs(x - p_x) <= zoom_corrected && abs(y - p_y) <= zoom_corrected):
add_chunk(x, y)
var chunk = get_chunk(x,y)