Color mask node added

addons/ShaderLib/Artistic/Mask/ColorMask.gd

@@ -0,0 +1,69 @@
+@tool
+class_name VisualShaderNodeMaskColorMask extends VisualShaderNodeCustom
+
+func _get_name() -> String:
+	return "ColorMask"
+
+func _get_category() -> String:
+	return "Artistic/Mask"
+
+func _get_description() -> String:
+	return "Creates a mask from values in input \"in\" equal to input \"mask color\"."
+
+func _get_return_icon_type() -> PortType:
+	return PORT_TYPE_VECTOR_4D
+
+func _get_input_port_count() -> int:
+	return 4
+
+func _get_input_port_name(port: int) -> String:
+	match port:
+		0:
+			return "in"
+		1:
+			return "color mask"
+		2:
+			return "range"
+		_:
+			return "fuzziness"
+
+func _get_input_port_type(port: int) -> PortType:
+	match port:
+		0, 1:
+			return PORT_TYPE_VECTOR_3D
+		_:
+			return PORT_TYPE_SCALAR
+
+func _get_input_port_default_value(port: int) -> Variant:
+	match port:
+		1:
+			return Vector3(0.0, 0.0, 0.0)
+		2, 3:
+			return 0.0
+		_:
+			return null
+
+func _get_output_port_count() -> int:
+	return 1
+
+func _get_output_port_name(port: int) -> String:
+	return "out"
+
+func _get_output_port_type(port: int) -> PortType:
+	return PORT_TYPE_VECTOR_4D
+
+func _get_global_code(mode: Shader.Mode) -> String:
+	var code: String = preload("ColorMask.gdshaderinc").code
+	return code
+
+func _get_code(input_vars: Array[String], output_vars: Array[String], mode: Shader.Mode, type: VisualShader.Type) -> String:
+	var input: String = "vec3(0.0)"
+
+	if input_vars[0]:
+		input = input_vars[0]
+
+	var color_mask: String = input_vars[1]
+	var range: String = input_vars[2]
+	var fuzziness: String = input_vars[3]
+
+	return output_vars[0] + " = color_mask(%s, %s, %s, %s);" % [input, color_mask, range, fuzziness]

addons/ShaderLib/Artistic/Mask/ColorMask.gdshaderinc

@@ -0,0 +1,4 @@
+vec4 color_mask(vec3 input, vec3 mask_color, float range, float fuzziness){
+	float dist = distance(mask_color, input);
+	return vec4(clamp(1. - (dist - range) / max(fuzziness, 1e-5), 0., 1.));
+}