Rectangle node added

addons/ShaderLib/Procedural/Shapes/Rectangle.gd

@@ -0,0 +1,65 @@
+@tool
+class_name VisualShaderNodeProceduralRectangle extends VisualShaderNodeCustom
+
+func _init() -> void:
+	_set_input_port_default_value(1, 0.5)
+	_set_input_port_default_value(2, 0.5)
+
+	output_port_for_preview = 0
+
+func _get_name() -> String:
+	return "Rectangle"
+
+func _get_category() -> String:
+	return "Procedural/Shapes"
+
+func _get_description() -> String:
+	return "Generates a rectangle shape based on input UV at the size specified by inputs width and height."
+
+func _get_return_icon_type() -> VisualShaderNode.PortType:
+	return PORT_TYPE_SCALAR
+
+func _get_input_port_count() -> int:
+	return 3
+
+func _get_input_port_name(port: int) -> String:
+	match port:
+		0:
+			return "uv"
+		1:
+			return "width"
+		2:
+			return "height"
+	return ""
+
+func _get_input_port_type(port: int) -> VisualShaderNode.PortType:
+	match port:
+		0:
+			return PORT_TYPE_VECTOR_2D
+		1, 2:
+			return PORT_TYPE_SCALAR
+	return PORT_TYPE_SCALAR
+
+func _get_output_port_count() -> int:
+	return 1
+
+func _get_output_port_name(port: int) -> String:
+	return "output"
+
+func _get_output_port_type(port: int) -> VisualShaderNode.PortType:
+	return PORT_TYPE_SCALAR
+
+func _get_global_code(mode: Shader.Mode) -> String:
+	var code: String = preload("Rectangle.gdshaderinc").code
+	return code
+
+func _get_code(input_vars: Array[String], output_vars: Array[String], mode: Shader.Mode, type: VisualShader.Type) -> String:
+	var uv: String = "UV"
+
+	if input_vars[0]:
+		uv = input_vars[0]
+
+	var width: String = input_vars[1]
+	var height: String = input_vars[2]
+
+	return output_vars[0] + " = rectangle_shape(%s, %s, %s);" % [uv, width, height]

addons/ShaderLib/Procedural/Shapes/Rectangle.gdshaderinc

@@ -0,0 +1,5 @@
+float rectangle_shape(vec2 uv, float width, float height){
+    vec2 _distance = abs(uv * 2.0 - 1.0) - vec2(width, height);
+    _distance = 1.0 - _distance / fwidth(_distance);
+    return clamp(min(_distance.x, _distance.y), 0.0, 1.0);
+}