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.));
+}

documentation/Documentation.md

@@ -15,6 +15,10 @@ Delete the contents of **_addons/ShaderLib_** folder from your project. Make sur
 <h4><a href="/documentation/Nodes/Artistic/Adjustment/SaturationNode.md">&emsp;&emsp;Saturation node</a></h4>
 <h4><a href="/documentation/Nodes/Artistic/Adjustment/WhiteBalanceNode.md">&emsp;&emsp;White Balance node</a></h4>
 
+<h3>&emsp;Mask</h3>
+
+<h4><a href="/documentation/Nodes/Artistic/Mask/ColorMaskNode.md">&emsp;&emsp;Color Mask node</a></h4>
+
 <h2>Geometry nodes</h2>
 
 <h4><a href="/documentation/Nodes/Geometry/Mesh.md">&emsp;Mesh node</a></h4>

documentation/Nodes/Artistic/Mask/ColorMaskNode.md

@@ -0,0 +1,17 @@
+# Color Mask node
+Creates a mask from values in input <b><i>in</i></b> equal to input <b><i>mask color</i></b>. Input <b><i>range</i></b> can be used to define a wider range of values around input <b><i>mask color</i></b> to create the mask. Colors within this range will return 1, otherwise the node will return 0. Input <b><i>fuzziness</i></b> can be used to soften the edges around the selection similar to anti-aliasing.
+<hr>
+
+**Inputs**
+|Name|Type|Binding|Description|
+|---|---|---|---|
+|in|vec3|none|Input value|
+|color mask|vec3|none|Color to use for mask|
+|range|float|none|Select colors within this range from input <b><i>mask color</i></b>|
+|fuzziness|float|none|Feather edges around selection. Higher values result in a softer selection mask.|
+  
+**Outputs**
+|Name|Type|Binding|Description|
+|---|---|---|---|
+|out|vec3|None|Output mask value|
+___