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class_name Camera
extends Camera2D
signal zoomed(zoom: Vector2)
var is_in_drag_mode := false
var drag_anchor := Vector2.ZERO
var is_in_edge_mode := false
var edge := Vector2.ZERO
@export var edge_scroll_margin := 4.0
@export var speed := 25
@export_group("Zoom", "zoom")
@export var zoom_min: float = 0.5
@export var zoom_max: float = 3
@export var zoom_step: float = 0.01
func _ready():
get_viewport().size_changed.connect(func():
set_new_position(global_position)
var new_zoom = Vector2(
(limit_right - limit_left) / get_viewport_rect().size.x,
(limit_bottom - limit_top) / get_viewport_rect().size.y
)
zoom = Vector2(
new_zoom[new_zoom.max_axis_index()],
new_zoom[new_zoom.max_axis_index()]
)
zoomed.emit(zoom)
)
Input.mouse_mode = Input.MOUSE_MODE_CONFINED
func _input(event):
if event.is_action("camera_zoom_out"):
var can_zoom_out = (
(limit_right - limit_left) / get_rect().size.x > 1.0 and
(limit_bottom - limit_top) / get_rect().size.y > 1.0
)
if can_zoom_out:
var new_zoom = max(zoom.x - zoom_step, zoom_min)
zoom = Vector2(new_zoom, new_zoom)
zoomed.emit(zoom)
if event.is_action("camera_zoom_in"):
var new_zoom = min(zoom.x + zoom_step, zoom_max)
zoom = Vector2(new_zoom, new_zoom)
zoomed.emit(zoom)
if event.is_action_pressed("camera_drag"):
is_in_drag_mode = true
drag_anchor = get_global_mouse_position()
Input.set_default_cursor_shape(Input.CURSOR_MOVE)
elif event.is_action_released("camera_drag"):
is_in_drag_mode = false
Input.set_default_cursor_shape(Input.CURSOR_ARROW)
if event is InputEventMouseMotion:
is_in_edge_mode = false
edge = Vector2.ZERO
if get_global_mouse_position().x - edge_scroll_margin <= get_rect().position.x:
is_in_edge_mode = true
edge += Vector2.LEFT
if get_global_mouse_position().y - edge_scroll_margin <= get_rect().position.y:
is_in_edge_mode = true
edge += Vector2.UP
if get_global_mouse_position().x + edge_scroll_margin >= get_rect().end.x:
is_in_edge_mode = true
edge += Vector2.RIGHT
if get_global_mouse_position().y + edge_scroll_margin >= get_rect().end.y:
is_in_edge_mode = true
edge += Vector2.DOWN
edge = edge.normalized()
if event is InputEventMouseButton and event.is_pressed():
Input.mouse_mode = Input.MOUSE_MODE_CONFINED
elif event.is_action_pressed("mouse_escape"):
Input.mouse_mode = Input.MOUSE_MODE_VISIBLE
func _process(delta):
if is_in_drag_mode:
set_new_position(global_position + drag_anchor - get_global_mouse_position())
if is_in_edge_mode:
set_new_position(
lerp(
global_position,
global_position + (edge * speed),
speed * delta
)
)
var direction_h = Input.get_axis("ui_left", "ui_right")
var direction_v = Input.get_axis("ui_up", "ui_down")
if direction_h != 0 or direction_v != 0:
set_new_position(
lerp(
global_position,
global_position + Vector2(direction_h * speed, direction_v * speed),
speed * delta
)
)
func set_new_position(new_position: Vector2):
new_position.x = clamp(
new_position.x,
limit_left,
limit_right - get_rect().size.x
)
new_position.y = clamp(
new_position.y,
limit_top,
limit_bottom - get_rect().size.y
)
global_position = new_position
func set_center(center_position: Vector2):
set_new_position(
center_position - (get_rect().size / 2)
)
func get_rect():
var viewport = get_viewport_rect()
return Rect2(
global_position,
viewport.size * Vector2(1 / zoom.x, 1 / zoom.y)
)
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