add bool constant and if true nodes

classes/deck/nodes/bool_constant.gd

@@ -0,0 +1,20 @@
+extends DeckNode
+
+
+func _init() -> void:
+	name = "Bool Constant"
+	node_type = name.to_snake_case()
+	category = "general"
+
+	add_output_port(
+		DeckType.Types.BOOL,
+		"Value",
+		"checkbox"
+	)
+
+
+func _value_request(_from_port: int) -> Variant:
+	if ports[0].value_callback.get_object():
+		return ports[0].value_callback.call()
+	else:
+		return ports[0].value

classes/deck/nodes/if_true.gd

@@ -0,0 +1,33 @@
+extends DeckNode
+
+
+func _init() -> void:
+	name = "Pass If True"
+	node_type = "if_true"
+	description = "Pass input if and only if the condition input is true."
+	category = "general"
+
+	add_input_port(
+		DeckType.Types.BOOL,
+		"Condition",
+		"checkbox"
+	)
+	add_input_port(
+		DeckType.Types.ANY,
+		"Input"
+	)
+
+	add_output_port(
+		DeckType.Types.ANY,
+		"Output"
+	)
+
+
+func _receive(to_input_port: int, data: Variant, extra_data: Array = []) -> void:
+	if to_input_port != 1:
+		return
+
+	if !request_value(0):
+		return
+
+	send(0, data, extra_data)

graph_node_renderer/add_node_menu.gd

@@ -178,7 +178,6 @@ func _on_category_collapse_toggled(collapsed: bool, category: String) -> void:
 class Category extends VBoxContainer:
 	const COLLAPSE_ICON := preload("res://graph_node_renderer/textures/collapse-icon.svg")
 	const COLLAPSE_ICON_COLLAPSED := preload("res://graph_node_renderer/textures/collapse-icon-collapsed.svg")
-
 	var collapse_button: Button
 
 	## Emitted when a child item has been pressed.