project.godot

@@ -14,6 +14,11 @@ _global_script_classes=[{
 "language": &"GDScript",
 "path": "res://terrain/dynamic_terrain_instance_3d.gd"
 }, {
+"base": "HFlowContainer",
+"class": &"ItemSelection",
+"language": &"GDScript",
+"path": "res://user_interface/button_selection.gd"
+}, {
 "base": "Node3D",
 "class": &"PlayerController",
 "language": &"GDScript",
@@ -36,6 +41,7 @@ _global_script_classes=[{
 }]
 _global_script_class_icons={
 "DynamicTerrainInstance3D": "",
+"ItemSelection": "",
 "PlayerController": "",
 "Settings": "",
 "TerrainInstance3D": "",

terrain/dynamic_terrain_instance_3d.gd

@@ -31,11 +31,11 @@ func clear(clear_elevation: float) -> void:
 	_editable_texture.update(_editable_image)
 
 ##
+## Oscillates the height of terrain toward a value of [member height_scale] (multiplied by
+## [code]level[/code]) around the area of [code]point[/code] determined by [code]mask[/code]
+## multiplied by [code]mask_scale[/code] at a rate of [code]intensity[/code].
 ##
-##
-func oscillate(point: Vector2i, level: float,
-	mask: Image, mask_scale: float, intensity: float, delta: float) -> void:
-
+func oscillate(point: Vector2i, level: float, mask: Image, mask_scale: float, intensity: float) -> void:
 	var mask_size := mask.get_size()
 	var brush_source := _get_brush_area(point, mask_size, mask_scale)
 
@@ -54,17 +54,17 @@ func oscillate(point: Vector2i, level: float,
 					var pixel := _editable_image.get_pixelv(coord)
 
 					_editable_image.set_pixelv(coord, Color(pixel.r, pixel.g, pixel.b,
-						lerpf(pixel.a, level, intensity * delta *\
+						lerpf(pixel.a, level, intensity *\
 							mask.get_pixel(int((offset.x + x) * mask_ratio.x), mask_y).a)).clamp())
 
 		_editable_texture.update(_editable_image)
 
 ##
+## Paints the texture of the terrain toward a value of [code]color[/code] multiplied by
+## [code]intensity[/code] around the area of [code]point[/code] determined by [code]mask[/code]
+## multiplied by [code]mask_scale[/code] at a rate of [code]intensity[/code].
 ##
-##
-func paint(point: Vector2i, color: Color,
-	mask: Image, mask_scale: float, intensity: float, delta: float) -> void:
-
+func paint(point: Vector2i, color: Color, mask: Image, mask_scale: float, intensity: float) -> void:
 	var mask_size := mask.get_size()
 	var brush_source := _get_brush_area(point, mask_size, mask_scale)
 
@@ -82,7 +82,7 @@ func paint(point: Vector2i, color: Color,
 					var coord := brush_target.position + Vector2i(x, y)
 					var pixel := _editable_image.get_pixelv(coord)
 
-					var mask_intensity_delta := intensity * delta *\
+					var mask_intensity_delta := intensity *\
 						mask.get_pixel(int((offset.x + x) * mask_ratio.x), mask_y).a
 
 					_editable_image.set_pixelv(coord, Color(
@@ -93,7 +93,10 @@ func paint(point: Vector2i, color: Color,
 		_editable_texture.update(_editable_image)
 
 ##
+## Attempts to resize the terrain geometry and map to be equal to [code]size[/code] (in-engine
+## units), with [code]Vector2i.ONE[/code] as the minimum size.
 ##
+## In the process of growing the terrain map, existing edge data will be copied to fill it out.
 ##
 func resize(size: Vector2i) -> void:
 	super.resize(size)

terrain/paints/terrain_paint.gd

@@ -1,13 +1,13 @@
 class_name TerrainPaint extends Resource
 
 ##
-##
+## Terrain albedo map data.
 ##
 @export
 var albedo_map: Texture2D = null
 
 ##
-##
+## Terrain normal map data.
 ##
 @export
 var normal_map: Texture2D = null

user_interface/button_selection.gd

@@ -0,0 +1,75 @@
+@tool
+class_name ItemSelection extends HFlowContainer
+
+##
+## An item has been selected via GUI selection or [method select_item].
+##
+signal item_selected(index: int)
+
+var _button_group := ButtonGroup.new()
+
+##
+## Number of items in the selection.
+##
+var item_count: int:
+	get:
+		return _button_group.get_buttons().size()
+
+func _get_configuration_warnings() -> PackedStringArray:
+	return PackedStringArray()
+
+##
+## Adds a new item with no text and only [code]icon[/code] as the icon to the selection.
+##
+func add_icon_item(icon: Texture2D) -> void:
+	var child_count := get_child_count()
+	var button := Button.new()
+
+	button.icon = icon
+	button.icon_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	button.toggle_mode = true
+	button.button_group = _button_group
+	button.button_pressed = child_count == 0
+
+	button.pressed.connect(func () -> void: select_item(child_count))
+	add_child(button)
+
+##
+## Returns the icon used by the item at [code]index[/code].
+##
+## An assertion is raised if [code]index[/code] is out of bounds from the item count.
+##
+func get_item_icon(index: int) -> Texture2D:
+	var buttons := _button_group.get_buttons()
+
+	assert(index < buttons.size(), "index out of range")
+
+	var button := buttons[index] as Button
+
+	return null if (button == null) else button.icon
+
+##
+## Returns the currently selected item index or [code]-1[/code] if no item is selected. 
+##
+func get_selected_item() -> int:
+	var pressed_button := _button_group.get_pressed_button()
+
+	return -1 if (pressed_button == null) else pressed_button.get_index()
+
+##
+## Selects the item at [code]index[/code], emitting [signal item_selected] at the end.
+##
+## An assertion is raised if [code]index[/code] is out of bounds from the item count.
+##
+func select_item(index: int) -> void:
+	var buttons := _button_group.get_buttons()
+
+	assert(index < buttons.size(), "index out of range")
+
+	var pressed_button := _button_group.get_pressed_button()
+
+	if pressed_button != null:
+		pressed_button.set_pressed_no_signal(false)
+
+	buttons[index].set_pressed_no_signal(true)
+	item_selected.emit(index)