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extends Camera2D
const MAX_ZOOM = 1
var margin :Vector2
var window : Vector2
var map_center : Vector2
var texture_size : Vector2
var zoom_boundaries : Vector2
func _ready():
margin = Vector2(50, 50)
func configure(w : Vector2, c : Vector2, ts : Vector2) -> void:
window = w
map_center = c
texture_size = ts
var zout : float = min(window.x / (texture_size.x + margin.x), window.y / (texture_size.y + margin.y))
zoom_boundaries = Vector2(zout, zout + MAX_ZOOM)
zoom = Vector2(zout, zout)
position = map_center
func update_camera(x : float, y : float, z : float) -> void:
if z != 0:
zoom.x = clamp(zoom.x + z, zoom_boundaries.x, zoom_boundaries.y)
zoom.y = zoom.x
position.x += x
position.y += y
var delta = texture_size + margin - (window / zoom.x)
if (delta.x <= 0):
position.x = map_center.x
else:
var dx = int(delta.x / 2)
position.x = clamp(position.x, map_center.x - dx, map_center.x + dx)
if (delta.y <= 0):
position.y = map_center.y
else:
var dy = int(delta.y / 2)
position.y = clamp(position.y, map_center.y - dy, map_center.y + dy)
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