Merge pull request #30466 from Chaosus/vs_boolean_funcs

Added "Is" and "Compare" functions to visual shaders

editor/plugins/visual_shader_editor_plugin.cpp

@@ -1150,6 +1150,18 @@ void VisualShaderEditor::_add_node(int p_idx, int p_op_idx) {
 				input->set_input_name(add_options[p_idx].sub_func_str);
 			}
 
+			VisualShaderNodeIs *is = Object::cast_to<VisualShaderNodeIs>(vsn);
+
+			if (is) {
+				is->set_function((VisualShaderNodeIs::Function)p_op_idx);
+			}
+
+			VisualShaderNodeCompare *cmp = Object::cast_to<VisualShaderNodeCompare>(vsn);
+
+			if (cmp) {
+				cmp->set_function((VisualShaderNodeCompare::Function)p_op_idx);
+			}
+
 			VisualShaderNodeColorOp *colorOp = Object::cast_to<VisualShaderNodeColorOp>(vsn);
 
 			if (colorOp) {
@@ -2039,10 +2051,24 @@ VisualShaderEditor::VisualShaderEditor() {
 	add_options.push_back(AddOption("ColorConstant", "Color", "Variables", "VisualShaderNodeColorConstant", TTR("Color constant."), -1, VisualShaderNode::PORT_TYPE_COLOR));
 	add_options.push_back(AddOption("ColorUniform", "Color", "Variables", "VisualShaderNodeColorUniform", TTR("Color uniform."), -1, VisualShaderNode::PORT_TYPE_COLOR));
 
-	// BOOLEAN
+	// CONDITIONAL
+
+	const String &compare_func_desc = TTR("Returns the boolean result of %s comparison between two parameters.");
 
+	add_options.push_back(AddOption("Equal", "Conditional", "Functions", "VisualShaderNodeCompare", vformat(compare_func_desc, TTR("Equal (==)")), VisualShaderNodeCompare::FUNC_EQUAL, VisualShaderNode::PORT_TYPE_BOOLEAN));
+	add_options.push_back(AddOption("GreaterThan", "Conditional", "Functions", "VisualShaderNodeCompare", vformat(compare_func_desc, TTR("Greater Than (>)")), VisualShaderNodeCompare::FUNC_GREATER_THAN, VisualShaderNode::PORT_TYPE_BOOLEAN));
+	add_options.push_back(AddOption("GreaterThanEqual", "Conditional", "Functions", "VisualShaderNodeCompare", vformat(compare_func_desc, TTR("Greater Than or Equal (>=)")), VisualShaderNodeCompare::FUNC_GREATER_THAN_EQUAL, VisualShaderNode::PORT_TYPE_BOOLEAN));
 	add_options.push_back(AddOption("If", "Conditional", "Functions", "VisualShaderNodeIf", TTR("Returns an associated vector if the provided scalars are equal, greater or less."), -1, VisualShaderNode::PORT_TYPE_VECTOR));
+	add_options.push_back(AddOption("IsInf", "Conditional", "Functions", "VisualShaderNodeIs", TTR("Returns the boolean result of the comparison between INF and a scalar parameter."), VisualShaderNodeIs::FUNC_IS_INF, VisualShaderNode::PORT_TYPE_BOOLEAN));
+	add_options.push_back(AddOption("IsNaN", "Conditional", "Functions", "VisualShaderNodeIs", TTR("Returns the boolean result of the comparison between NaN and a scalar parameter."), VisualShaderNodeIs::FUNC_IS_NAN, VisualShaderNode::PORT_TYPE_BOOLEAN));
+	add_options.push_back(AddOption("LessThan", "Conditional", "Functions", "VisualShaderNodeCompare", vformat(compare_func_desc, TTR("Less Than (<)")), VisualShaderNodeCompare::FUNC_LESS_THAN, VisualShaderNode::PORT_TYPE_BOOLEAN));
+	add_options.push_back(AddOption("LessThanEqual", "Conditional", "Functions", "VisualShaderNodeCompare", vformat(compare_func_desc, TTR("Less Than or Equal (<=)")), VisualShaderNodeCompare::FUNC_LESS_THAN_EQUAL, VisualShaderNode::PORT_TYPE_BOOLEAN));
+	add_options.push_back(AddOption("NotEqual", "Conditional", "Functions", "VisualShaderNodeCompare", vformat(compare_func_desc, TTR("Not Equal (!=)")), VisualShaderNodeCompare::FUNC_NOT_EQUAL, VisualShaderNode::PORT_TYPE_BOOLEAN));
 	add_options.push_back(AddOption("Switch", "Conditional", "Functions", "VisualShaderNodeSwitch", TTR("Returns an associated vector if the provided boolean value is true or false."), -1, VisualShaderNode::PORT_TYPE_VECTOR));
+
+	add_options.push_back(AddOption("Compare", "Conditional", "Common", "VisualShaderNodeCompare", TTR("Returns the boolean result of the contains the result of comparison between two parameters."), -1, VisualShaderNode::PORT_TYPE_BOOLEAN));
+	add_options.push_back(AddOption("Is", "Conditional", "Common", "VisualShaderNodeIs", TTR("Returns the boolean result of the comparison between INF (or NaN) and a scalar parameter."), -1, VisualShaderNode::PORT_TYPE_BOOLEAN));
+
 	add_options.push_back(AddOption("BooleanConstant", "Conditional", "Variables", "VisualShaderNodeBooleanConstant", TTR("Boolean constant."), -1, VisualShaderNode::PORT_TYPE_BOOLEAN));
 	add_options.push_back(AddOption("BooleanUniform", "Conditional", "Variables", "VisualShaderNodeBooleanUniform", TTR("Boolean uniform."), -1, VisualShaderNode::PORT_TYPE_BOOLEAN));
 
@@ -2276,7 +2302,7 @@ VisualShaderEditor::VisualShaderEditor() {
 	add_options.push_back(AddOption("Dot", "Vector", "Functions", "VisualShaderNodeDotProduct", TTR("Calculates the dot product of two vectors."), -1, VisualShaderNode::PORT_TYPE_SCALAR));
 	add_options.push_back(AddOption("Exp", "Vector", "Functions", "VisualShaderNodeVectorFunc", TTR("Base-e Exponential."), VisualShaderNodeVectorFunc::FUNC_EXP, VisualShaderNode::PORT_TYPE_VECTOR));
 	add_options.push_back(AddOption("Exp2", "Vector", "Functions", "VisualShaderNodeVectorFunc", TTR("Base-2 Exponential."), VisualShaderNodeVectorFunc::FUNC_EXP2, VisualShaderNode::PORT_TYPE_VECTOR));
-	add_options.push_back(AddOption("FaceForward", "Vector", "Functions", "VisualShaderNodeFaceForward", TTR("Returns a vector that points in the same direction as a reference vector. The function has three vector parameters : N, the vector to orient, I, the incident vector, and Nref, the reference vector. If the dot product of I and Nref is smaller than zero the return value is N. Otherwise -N is returned."), -1, VisualShaderNode::PORT_TYPE_VECTOR));
+	add_options.push_back(AddOption("FaceForward", "Vector", "Functions", "VisualShaderNodeFaceForward", TTR("Returns the vector that points in the same direction as a reference vector. The function has three vector parameters : N, the vector to orient, I, the incident vector, and Nref, the reference vector. If the dot product of I and Nref is smaller than zero the return value is N. Otherwise -N is returned."), -1, VisualShaderNode::PORT_TYPE_VECTOR));
 	add_options.push_back(AddOption("Floor", "Vector", "Functions", "VisualShaderNodeVectorFunc", TTR("Finds the nearest integer less than or equal to the parameter."), VisualShaderNodeVectorFunc::FUNC_FLOOR, VisualShaderNode::PORT_TYPE_VECTOR));
 	add_options.push_back(AddOption("Fract", "Vector", "Functions", "VisualShaderNodeVectorFunc", TTR("Computes the fractional part of the argument."), VisualShaderNodeVectorFunc::FUNC_FRAC, VisualShaderNode::PORT_TYPE_VECTOR));
 	add_options.push_back(AddOption("InverseSqrt", "Vector", "Functions", "VisualShaderNodeVectorFunc", TTR("Returns the inverse of the square root of the parameter."), VisualShaderNodeVectorFunc::FUNC_INVERSE_SQRT, VisualShaderNode::PORT_TYPE_VECTOR));
@@ -2292,8 +2318,8 @@ VisualShaderEditor::VisualShaderEditor() {
 	add_options.push_back(AddOption("Pow", "Vector", "Functions", "VisualShaderNodeVectorOp", TTR("Returns the value of the first parameter raised to the power of the second."), VisualShaderNodeVectorOp::OP_POW, VisualShaderNode::PORT_TYPE_VECTOR));
 	add_options.push_back(AddOption("Radians", "Vector", "Functions", "VisualShaderNodeVectorFunc", TTR("Converts a quantity in degrees to radians."), VisualShaderNodeVectorFunc::FUNC_RADIANS, VisualShaderNode::PORT_TYPE_VECTOR));
 	add_options.push_back(AddOption("Reciprocal", "Vector", "Functions", "VisualShaderNodeVectorFunc", TTR("1.0 / vector"), VisualShaderNodeVectorFunc::FUNC_RECIPROCAL, VisualShaderNode::PORT_TYPE_VECTOR));
-	add_options.push_back(AddOption("Reflect", "Vector", "Functions", "VisualShaderNodeVectorOp", TTR("Returns a vector that points in the direction of reflection ( a : incident vector, b : normal vector )."), VisualShaderNodeVectorOp::OP_REFLECT, VisualShaderNode::PORT_TYPE_VECTOR));
-	add_options.push_back(AddOption("Refract", "Vector", "Functions", "VisualShaderNodeVectorRefract", TTR("Returns a vector that points in the direction of refraction."), -1, VisualShaderNode::PORT_TYPE_VECTOR));
+	add_options.push_back(AddOption("Reflect", "Vector", "Functions", "VisualShaderNodeVectorOp", TTR("Returns the vector that points in the direction of reflection ( a : incident vector, b : normal vector )."), VisualShaderNodeVectorOp::OP_REFLECT, VisualShaderNode::PORT_TYPE_VECTOR));
+	add_options.push_back(AddOption("Refract", "Vector", "Functions", "VisualShaderNodeVectorRefract", TTR("Returns the vector that points in the direction of refraction."), -1, VisualShaderNode::PORT_TYPE_VECTOR));
 	add_options.push_back(AddOption("Round", "Vector", "Functions", "VisualShaderNodeVectorFunc", TTR("(GLES3 only) Finds the nearest integer to the parameter."), VisualShaderNodeVectorFunc::FUNC_ROUND, VisualShaderNode::PORT_TYPE_VECTOR));
 	add_options.push_back(AddOption("RoundEven", "Vector", "Functions", "VisualShaderNodeVectorFunc", TTR("(GLES3 only) Finds the nearest even integer to the parameter."), VisualShaderNodeVectorFunc::FUNC_ROUNDEVEN, VisualShaderNode::PORT_TYPE_VECTOR));
 	add_options.push_back(AddOption("Saturate", "Vector", "Functions", "VisualShaderNodeVectorFunc", TTR("Clamps the value between 0.0 and 1.0."), VisualShaderNodeVectorFunc::FUNC_SATURATE, VisualShaderNode::PORT_TYPE_VECTOR));

scene/register_scene_types.cpp

@@ -527,6 +527,8 @@ void register_scene_types() {
 	ClassDB::register_class<VisualShaderNodeSwitch>();
 	ClassDB::register_class<VisualShaderNodeFresnel>();
 	ClassDB::register_class<VisualShaderNodeExpression>();
+	ClassDB::register_class<VisualShaderNodeIs>();
+	ClassDB::register_class<VisualShaderNodeCompare>();
 
 	ClassDB::register_class<ShaderMaterial>();
 	ClassDB::register_virtual_class<CanvasItem>();

scene/resources/visual_shader_nodes.cpp

@@ -3200,3 +3200,317 @@ VisualShaderNodeFresnel::VisualShaderNodeFresnel() {
 	set_input_port_default_value(2, false);
 	set_input_port_default_value(3, 1.0);
 }
+
+////////////// Is
+
+String VisualShaderNodeIs::get_caption() const {
+
+	return "Is";
+}
+
+int VisualShaderNodeIs::get_input_port_count() const {
+
+	return 1;
+}
+
+VisualShaderNodeIs::PortType VisualShaderNodeIs::get_input_port_type(int p_port) const {
+
+	return PORT_TYPE_SCALAR;
+}
+
+String VisualShaderNodeIs::get_input_port_name(int p_port) const {
+
+	return "";
+}
+
+int VisualShaderNodeIs::get_output_port_count() const {
+
+	return 1;
+}
+
+VisualShaderNodeIs::PortType VisualShaderNodeIs::get_output_port_type(int p_port) const {
+
+	return PORT_TYPE_BOOLEAN;
+}
+
+String VisualShaderNodeIs::get_output_port_name(int p_port) const {
+
+	return "";
+}
+
+String VisualShaderNodeIs::generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview) const {
+
+	static const char *funcs[FUNC_IS_NAN + 1] = {
+		"isinf($)",
+		"isnan($)"
+	};
+
+	String code;
+	code += "\t" + p_output_vars[0] + "=" + String(funcs[func]).replace("$", p_input_vars[0]) + ";\n";
+	return code;
+}
+
+void VisualShaderNodeIs::set_function(Function p_func) {
+
+	func = p_func;
+	emit_changed();
+}
+
+VisualShaderNodeIs::Function VisualShaderNodeIs::get_function() const {
+
+	return func;
+}
+
+Vector<StringName> VisualShaderNodeIs::get_editable_properties() const {
+
+	Vector<StringName> props;
+	props.push_back("function");
+	return props;
+}
+
+void VisualShaderNodeIs::_bind_methods() {
+
+	ClassDB::bind_method(D_METHOD("set_function", "func"), &VisualShaderNodeIs::set_function);
+	ClassDB::bind_method(D_METHOD("get_function"), &VisualShaderNodeIs::get_function);
+
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "function", PROPERTY_HINT_ENUM, "Inf,NaN"), "set_function", "get_function");
+
+	BIND_ENUM_CONSTANT(FUNC_IS_INF);
+	BIND_ENUM_CONSTANT(FUNC_IS_NAN);
+}
+
+VisualShaderNodeIs::VisualShaderNodeIs() {
+
+	func = FUNC_IS_INF;
+	set_input_port_default_value(0, 0.0);
+}
+
+////////////// Compare
+
+String VisualShaderNodeCompare::get_caption() const {
+
+	return "Compare";
+}
+
+int VisualShaderNodeCompare::get_input_port_count() const {
+
+	if (ctype == CTYPE_SCALAR && (func == FUNC_EQUAL || func == FUNC_NOT_EQUAL)) {
+		return 3;
+	}
+	return 2;
+}
+
+VisualShaderNodeCompare::PortType VisualShaderNodeCompare::get_input_port_type(int p_port) const {
+
+	if (p_port == 2)
+		return PORT_TYPE_SCALAR;
+	switch (ctype) {
+		case CTYPE_SCALAR:
+			return PORT_TYPE_SCALAR;
+		case CTYPE_VECTOR:
+			return PORT_TYPE_VECTOR;
+		case CTYPE_BOOLEAN:
+			return PORT_TYPE_BOOLEAN;
+		case CTYPE_TRANSFORM:
+			return PORT_TYPE_TRANSFORM;
+	}
+	return PORT_TYPE_VECTOR;
+}
+
+String VisualShaderNodeCompare::get_input_port_name(int p_port) const {
+	if (p_port == 0)
+		return "a";
+	else if (p_port == 1)
+		return "b";
+	else if (p_port == 2)
+		return "tolerance";
+	return "";
+}
+
+int VisualShaderNodeCompare::get_output_port_count() const {
+	return 1;
+}
+
+VisualShaderNodeCompare::PortType VisualShaderNodeCompare::get_output_port_type(int p_port) const {
+	return PORT_TYPE_BOOLEAN;
+}
+
+String VisualShaderNodeCompare::get_output_port_name(int p_port) const {
+	if (p_port == 0)
+		return "result";
+	return "";
+}
+
+String VisualShaderNodeCompare::get_warning(Shader::Mode p_mode, VisualShader::Type p_type) const {
+
+	if (ctype == CTYPE_BOOLEAN || ctype == CTYPE_TRANSFORM) {
+		if (func > FUNC_NOT_EQUAL) {
+			return TTR("Invalid comparsion function for that type.");
+		}
+	}
+
+	return "";
+}
+
+String VisualShaderNodeCompare::generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview) const {
+
+	static const char *ops[FUNC_LESS_THAN_EQUAL + 1] = {
+		"==",
+		"!=",
+		">",
+		">=",
+		"<",
+		"<=",
+	};
+
+	static const char *funcs[FUNC_LESS_THAN_EQUAL + 1] = {
+		"equal($)",
+		"notEqual($)",
+		"greaterThan($)",
+		"greaterThanEqual($)",
+		"lessThan($)",
+		"lessThanEqual($)",
+	};
+
+	static const char *conds[COND_ANY + 1] = {
+		"all($)",
+		"any($)",
+	};
+
+	String code;
+	switch (ctype) {
+		case CTYPE_SCALAR:
+			if (func == FUNC_EQUAL) {
+				code += "\t" + p_output_vars[0] + "=(abs(" + p_input_vars[0] + "-" + p_input_vars[1] + ")<" + p_input_vars[2] + ");";
+			} else if (func == FUNC_NOT_EQUAL) {
+				code += "\t" + p_output_vars[0] + "=!(abs(" + p_input_vars[0] + "-" + p_input_vars[1] + ")<" + p_input_vars[2] + ");";
+			} else {
+				code += "\t" + p_output_vars[0] + "=" + (p_input_vars[0] + "$" + p_input_vars[1]).replace("$", ops[func]) + ";\n";
+			}
+			break;
+
+		case CTYPE_VECTOR:
+			code += "\t{\n";
+			code += "\t\tbvec3 _bv=" + String(funcs[func]).replace("$", p_input_vars[0] + ", " + p_input_vars[1]) + ";\n";
+			code += "\t\t" + p_output_vars[0] + "=" + String(conds[condition]).replace("$", "_bv") + ";\n";
+			code += "\t}\n";
+			break;
+
+		case CTYPE_BOOLEAN:
+			if (func > FUNC_NOT_EQUAL)
+				return "\t" + p_output_vars[0] + "=false;\n";
+			code += "\t" + p_output_vars[0] + "=" + (p_input_vars[0] + "$" + p_input_vars[1]).replace("$", ops[func]) + ";\n";
+			break;
+
+		case CTYPE_TRANSFORM:
+			if (func > FUNC_NOT_EQUAL)
+				return "\t" + p_output_vars[0] + "=false;\n";
+			code += "\t" + p_output_vars[0] + "=" + (p_input_vars[0] + "$" + p_input_vars[1]).replace("$", ops[func]) + ";\n";
+			break;
+
+		default:
+			break;
+	}
+	return code;
+}
+
+void VisualShaderNodeCompare::set_comparsion_type(ComparsionType p_type) {
+
+	ctype = p_type;
+
+	switch (ctype) {
+		case CTYPE_SCALAR:
+			set_input_port_default_value(0, 0.0);
+			set_input_port_default_value(1, 0.0);
+			break;
+		case CTYPE_VECTOR:
+			set_input_port_default_value(0, Vector3(0.0, 0.0, 0.0));
+			set_input_port_default_value(1, Vector3(0.0, 0.0, 0.0));
+			break;
+		case CTYPE_BOOLEAN:
+			set_input_port_default_value(0, false);
+			set_input_port_default_value(1, false);
+			break;
+		case CTYPE_TRANSFORM:
+			set_input_port_default_value(0, Transform());
+			set_input_port_default_value(1, Transform());
+			break;
+	}
+	emit_changed();
+}
+
+VisualShaderNodeCompare::ComparsionType VisualShaderNodeCompare::get_comparsion_type() const {
+
+	return ctype;
+}
+
+void VisualShaderNodeCompare::set_function(Function p_func) {
+
+	func = p_func;
+	emit_changed();
+}
+
+VisualShaderNodeCompare::Function VisualShaderNodeCompare::get_function() const {
+
+	return func;
+}
+
+void VisualShaderNodeCompare::set_condition(Condition p_cond) {
+
+	condition = p_cond;
+	emit_changed();
+}
+
+VisualShaderNodeCompare::Condition VisualShaderNodeCompare::get_condition() const {
+
+	return condition;
+}
+
+Vector<StringName> VisualShaderNodeCompare::get_editable_properties() const {
+	Vector<StringName> props;
+	props.push_back("type");
+	props.push_back("function");
+	if (ctype == CTYPE_VECTOR)
+		props.push_back("condition");
+	return props;
+}
+
+void VisualShaderNodeCompare::_bind_methods() {
+
+	ClassDB::bind_method(D_METHOD("set_comparsion_type", "type"), &VisualShaderNodeCompare::set_comparsion_type);
+	ClassDB::bind_method(D_METHOD("get_comparsion_type"), &VisualShaderNodeCompare::get_comparsion_type);
+
+	ClassDB::bind_method(D_METHOD("set_function", "func"), &VisualShaderNodeCompare::set_function);
+	ClassDB::bind_method(D_METHOD("get_function"), &VisualShaderNodeCompare::get_function);
+
+	ClassDB::bind_method(D_METHOD("set_condition", "condition"), &VisualShaderNodeCompare::set_condition);
+	ClassDB::bind_method(D_METHOD("get_condition"), &VisualShaderNodeCompare::get_condition);
+
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "type", PROPERTY_HINT_ENUM, "Scalar,Vector,Boolean,Transform"), "set_comparsion_type", "get_comparsion_type");
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "function", PROPERTY_HINT_ENUM, "a == b,a != b,a > b,a >= b,a < b,a <= b"), "set_function", "get_function");
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "condition", PROPERTY_HINT_ENUM, "All,Any"), "set_condition", "get_condition");
+
+	BIND_ENUM_CONSTANT(CTYPE_SCALAR);
+	BIND_ENUM_CONSTANT(CTYPE_VECTOR);
+	BIND_ENUM_CONSTANT(CTYPE_BOOLEAN);
+	BIND_ENUM_CONSTANT(CTYPE_TRANSFORM);
+
+	BIND_ENUM_CONSTANT(FUNC_EQUAL);
+	BIND_ENUM_CONSTANT(FUNC_NOT_EQUAL);
+	BIND_ENUM_CONSTANT(FUNC_GREATER_THAN);
+	BIND_ENUM_CONSTANT(FUNC_GREATER_THAN_EQUAL);
+	BIND_ENUM_CONSTANT(FUNC_LESS_THAN);
+	BIND_ENUM_CONSTANT(FUNC_LESS_THAN_EQUAL);
+
+	BIND_ENUM_CONSTANT(COND_ALL);
+	BIND_ENUM_CONSTANT(COND_ANY);
+}
+
+VisualShaderNodeCompare::VisualShaderNodeCompare() {
+	ctype = CTYPE_SCALAR;
+	func = FUNC_EQUAL;
+	condition = COND_ALL;
+	set_input_port_default_value(0, 0.0);
+	set_input_port_default_value(1, 0.0);
+	set_input_port_default_value(2, CMP_EPSILON);
+}

scene/resources/visual_shader_nodes.h

@@ -1513,4 +1513,115 @@ public:
 	VisualShaderNodeFresnel();
 };
 
+///////////////////////////////////////
+/// Is
+///////////////////////////////////////
+
+class VisualShaderNodeIs : public VisualShaderNode {
+	GDCLASS(VisualShaderNodeIs, VisualShaderNode);
+
+public:
+	enum Function {
+		FUNC_IS_INF,
+		FUNC_IS_NAN,
+	};
+
+protected:
+	Function func;
+
+protected:
+	static void _bind_methods();
+
+public:
+	virtual String get_caption() const;
+
+	virtual int get_input_port_count() const;
+	virtual PortType get_input_port_type(int p_port) const;
+	virtual String get_input_port_name(int p_port) const;
+
+	virtual int get_output_port_count() const;
+	virtual PortType get_output_port_type(int p_port) const;
+	virtual String get_output_port_name(int p_port) const;
+
+	virtual String generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview = false) const; //if no output is connected, the output var passed will be empty. if no input is connected and input is NIL, the input var passed will be empty
+
+	void set_function(Function p_func);
+	Function get_function() const;
+
+	virtual Vector<StringName> get_editable_properties() const;
+
+	VisualShaderNodeIs();
+};
+
+VARIANT_ENUM_CAST(VisualShaderNodeIs::Function)
+
+///////////////////////////////////////
+/// Compare
+///////////////////////////////////////
+
+class VisualShaderNodeCompare : public VisualShaderNode {
+	GDCLASS(VisualShaderNodeCompare, VisualShaderNode);
+
+public:
+	enum ComparsionType {
+		CTYPE_SCALAR,
+		CTYPE_VECTOR,
+		CTYPE_BOOLEAN,
+		CTYPE_TRANSFORM
+	};
+
+	enum Function {
+		FUNC_EQUAL,
+		FUNC_NOT_EQUAL,
+		FUNC_GREATER_THAN,
+		FUNC_GREATER_THAN_EQUAL,
+		FUNC_LESS_THAN,
+		FUNC_LESS_THAN_EQUAL,
+	};
+
+	enum Condition {
+		COND_ALL,
+		COND_ANY,
+	};
+
+protected:
+	ComparsionType ctype;
+	Function func;
+	Condition condition;
+
+protected:
+	static void _bind_methods();
+
+public:
+	virtual String get_caption() const;
+
+	virtual int get_input_port_count() const;
+	virtual PortType get_input_port_type(int p_port) const;
+	virtual String get_input_port_name(int p_port) const;
+
+	virtual int get_output_port_count() const;
+	virtual PortType get_output_port_type(int p_port) const;
+	virtual String get_output_port_name(int p_port) const;
+
+	virtual String generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview = false) const; //if no output is connected, the output var passed will be empty. if no input is connected and input is NIL, the input var passed will be empty
+
+	void set_comparsion_type(ComparsionType p_func);
+	ComparsionType get_comparsion_type() const;
+
+	void set_function(Function p_func);
+	Function get_function() const;
+
+	void set_condition(Condition p_mode);
+	Condition get_condition() const;
+
+	virtual Vector<StringName> get_editable_properties() const;
+	virtual String get_warning(Shader::Mode p_mode, VisualShader::Type p_type) const;
+
+	VisualShaderNodeCompare();
+};
+
+VARIANT_ENUM_CAST(VisualShaderNodeCompare::ComparsionType)
+VARIANT_ENUM_CAST(VisualShaderNodeCompare::Function)
+VARIANT_ENUM_CAST(VisualShaderNodeCompare::Condition)
+
 #endif // VISUAL_SHADER_NODES_H