Maths nodes refactored, Smoothmin and Smoothmax nodes added

addons/ShaderLib/Maths/Scalar/SmoothMin.gd

@@ -0,0 +1,56 @@
+@tool
+class_name VisualShaderNodeScalarSmoothMin extends VisualShaderNodeCustom
+
+func _get_name() -> String:
+	return "SmoothMin"
+
+func _get_category() -> String:
+	return "Maths/Scalar"
+
+func _get_description() -> String:
+	return "Returns the minimum value between A and B, but smooths out the intersections of A and B based on T."
+
+func _get_return_icon_type() -> 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 "a"
+		1:
+			return "b"
+		_:
+			return "t"
+
+func _get_input_port_type(port: int) -> PortType:
+	return PORT_TYPE_SCALAR
+
+func _get_input_port_default_value(port: int) -> Variant:
+	match port:
+		2:
+			return 0.5
+		_:
+			return 0.0
+
+func _get_output_port_count() -> int:
+	return 1
+
+func _get_output_port_name(port: int) -> String:
+	return "op"
+
+func _get_output_port_type(port: int) -> PortType:
+	return PORT_TYPE_SCALAR
+
+func _get_global_code(mode: Shader.Mode) -> String:
+	var code: String = preload("SmoothMin.gdshaderinc").code
+	return code
+
+func _get_code(input_vars: Array[String], output_vars: Array[String], mode: Shader.Mode, type: VisualShader.Type) -> String:
+	var a: String = input_vars[0]
+	var b: String = input_vars[1]
+	var t: String = input_vars[2]
+
+	return output_vars[0] + " = smoothmin(%s, %s, %s);" % [a, b, t]