implemented vertical zoom (via Codex CLI)

Author: LazerVV

src/Autoload/Global.gd

@@ -214,6 +214,28 @@ var integer_zoom := false:
 			zoom_slider.step = 1
 		zoom_slider.value = zoom_slider.value  # to trigger signal emission
 
+## Vertical display zoom factor for the canvas (Y axis only).
+## 1.0 means no vertical stretch; 2.0 doubles visible height of pixels.
+var vertical_zoom := 1.0:
+	set(value):
+		if is_equal_approx(value, vertical_zoom):
+			return
+		vertical_zoom = value
+		if is_instance_valid(top_menu_container):
+			var vzs: ValueSlider = top_menu_container.get_node("%VerticalZoomSlider")
+			if is_instance_valid(vzs) and !is_equal_approx(vzs.value, vertical_zoom * 100.0):
+				vzs.value = vertical_zoom * 100.0
+		# Persist with the current project like normal zoom (session-only)
+		if is_instance_valid(current_project):
+			current_project.vertical_zoom = vertical_zoom
+		# Update all canvas cameras to apply new transform and checkerboard scale
+		for cam in get_tree().get_nodes_in_group("CanvasCameras"):
+			if cam is CanvasCamera:
+				cam._update_viewport_transform()
+				cam.update_transparent_checker_offset()
+		# Ensure rulers refresh to reflect new pixel size
+		get_tree().call_group("CanvasRulers", "queue_redraw")
+
 ## Found in Preferences. The scale of the interface.
 var shrink := 1.0
 var theme_font := loaded_fonts[theme_font_index]:

src/Classes/Project.gd

@@ -67,6 +67,9 @@ var fps := 6.0:
 		fps_changed.emit()
 var user_data := ""  ## User defined data, set in the project properties.
 
+# Session-only view state
+var vertical_zoom := 1.0
+
 var x_symmetry_point: float
 var y_symmetry_point: float
 var xy_symmetry_point: Vector2

src/UI/Canvas/CanvasCamera.gd

@@ -40,6 +40,7 @@ var mouse_pos := Vector2.ZERO
 var drag := false
 var rotation_slider: ValueSlider
 var zoom_slider: ValueSlider
+var vertical_zoom_slider: ValueSlider
 var should_tween := true
 
 @onready var viewport := get_viewport()
@@ -55,6 +56,8 @@ func _ready() -> void:
 		rotation_slider.value_changed.connect(_rotation_slider_value_changed)
 		zoom_slider = Global.top_menu_container.get_node("%ZoomSlider")
 		zoom_slider.value_changed.connect(_zoom_slider_value_changed)
+		vertical_zoom_slider = Global.top_menu_container.get_node("%VerticalZoomSlider")
+		vertical_zoom_slider.value_changed.connect(_vertical_zoom_slider_value_changed)
 	zoom_changed.connect(_zoom_changed)
 	rotation_changed.connect(_rotation_changed)
 	viewport_container = get_viewport().get_parent()
@@ -182,7 +185,10 @@ func update_transparent_checker_offset() -> void:
 func _update_viewport_transform() -> void:
 	if not is_instance_valid(viewport):
 		return
-	var zoom_scale := Vector2.ONE / zoom
+	var zoom_scale := Vector2(
+		1.0 / zoom.x,
+		1.0 / (zoom.y * maxf(Global.vertical_zoom, 0.01))
+	)
 	var viewport_size := get_viewport_rect().size
 	var screen_offset := viewport_size * 0.5 * zoom_scale
 	screen_offset = screen_offset.rotated(camera_angle)
@@ -198,6 +204,7 @@ func _zoom_changed() -> void:
 	if index == Cameras.MAIN:
 		should_tween = false
 		zoom_slider.value = zoom.x * 100.0
+		vertical_zoom_slider.value = Global.vertical_zoom * 100.0
 		should_tween = true
 		for guide in Global.current_project.guides:
 			guide.width = 1.0 / zoom.x * 2
@@ -231,6 +238,14 @@ func _rotation_slider_value_changed(value: float) -> void:
 	camera_angle = angle
 
 
+func _vertical_zoom_slider_value_changed(value: float) -> void:
+	# Convert percentage to factor
+	var factor := value / 100.0
+	if is_equal_approx(Global.vertical_zoom, factor):
+		return
+	Global.vertical_zoom = factor
+
+
 func _has_selection_tool() -> bool:
 	for slot in Tools._slots.values():
 		if slot.tool_node is BaseSelectionTool:
@@ -242,6 +257,9 @@ func _project_switched() -> void:
 	offset = Global.current_project.cameras_offset[index]
 	camera_angle = Global.current_project.cameras_rotation[index]
 	zoom = Global.current_project.cameras_zoom[index]
+	# Restore session vertical zoom per project
+	if index == Cameras.MAIN:
+		Global.vertical_zoom = Global.current_project.vertical_zoom
 
 
 func _rotate_camera_around_point(degrees: float, point: Vector2) -> void:

src/UI/Canvas/Rulers/VerticalRuler.gd

@@ -35,13 +35,14 @@ func _draw() -> void:
 	var ruler_transform := Transform2D()
 	var major_subdivide := Transform2D()
 	var minor_subdivide := Transform2D()
-	var zoom := Global.camera.zoom.x
-	transform.y = Vector2(zoom, zoom)
+	# Use effective Y scale: base zoom times vertical display zoom
+	var y_zoom := Global.camera.zoom.x * maxf(Global.vertical_zoom, 0.01)
+	transform.y = Vector2(y_zoom, y_zoom)
 
 	# This tracks the "true" top left corner of the drawing:
 	transform.origin = (
 		Global.main_viewport.size / 2
-		+ Global.camera.offset.rotated(-Global.camera.rotation) * -zoom
+		+ Global.camera.offset.rotated(-Global.camera.rotation) * -y_zoom
 	)
 
 	var proj_size := Global.current_project.size
@@ -51,15 +52,15 @@ func _draw() -> void:
 	var b := Vector2(proj_size.x, 0).rotated(-Global.camera.rotation)  # Top right
 	var c := Vector2(0, proj_size.y).rotated(-Global.camera.rotation)  # Bottom left
 	var d := Vector2(proj_size.x, proj_size.y).rotated(-Global.camera.rotation)  # Bottom right
-	transform.origin.y += minf(minf(a.y, b.y), minf(c.y, d.y)) * zoom
+	transform.origin.y += minf(minf(a.y, b.y), minf(c.y, d.y)) * y_zoom
 
 	var basic_rule := 100.0
 	var i := 0
-	while basic_rule * zoom > 100:
+	while basic_rule * y_zoom > 100:
 		basic_rule /= 5.0 if i % 2 else 2.0
 		i += 1
 	i = 0
-	while basic_rule * zoom < 100:
+	while basic_rule * y_zoom < 100:
 		basic_rule *= 2.0 if i % 2 else 5.0
 		i += 1
 

src/UI/TopMenuContainer/TopMenuContainer.tscn

@@ -91,6 +91,27 @@ script = ExtResource("1")
 suffix = "%"
 snap_step = 100.0
 
+[node name="VerticalZoomSlider" type="TextureProgressBar" parent="MarginContainer/HBoxContainer/TopLabels"]
+unique_name_in_owner = true
+custom_minimum_size = Vector2(90, 20)
+layout_mode = 2
+size_flags_vertical = 4
+focus_mode = 2
+mouse_default_cursor_shape = 2
+theme_type_variation = &"ValueSlider"
+min_value = 25.0
+max_value = 400.0
+value = 100.0
+allow_greater = true
+nine_patch_stretch = true
+stretch_margin_left = 3
+stretch_margin_top = 3
+stretch_margin_right = 3
+stretch_margin_bottom = 3
+script = ExtResource("1")
+suffix = "V%"
+snap_step = 25.0
+
 [node name="CursorPosition" type="Label" parent="MarginContainer/HBoxContainer/TopLabels"]
 layout_mode = 2
 text = "[64×64]"