5 files changed, 54 insertions, 12 deletions
diff --git a/scene/register_scene_types.cpp b/scene/register_scene_types.cpp
index 30077aa642..6fc896597d 100644
--- a/scene/register_scene_types.cpp
+++ b/scene/register_scene_types.cpp
@@ -533,6 +533,7 @@ void register_scene_types() {
 	ClassDB::register_virtual_class<VisualShaderNodeOutput>();
 	ClassDB::register_virtual_class<VisualShaderNodeResizableBase>();
 	ClassDB::register_virtual_class<VisualShaderNodeGroupBase>();
+	ClassDB::register_virtual_class<VisualShaderNodeConstant>();
 	ClassDB::register_class<VisualShaderNodeFloatConstant>();
 	ClassDB::register_class<VisualShaderNodeIntConstant>();
 	ClassDB::register_class<VisualShaderNodeBooleanConstant>();
diff --git a/scene/resources/visual_shader.cpp b/scene/resources/visual_shader.cpp
index e519647504..fec7fa0b74 100644
--- a/scene/resources/visual_shader.cpp
+++ b/scene/resources/visual_shader.cpp
@@ -486,6 +486,21 @@ void VisualShader::remove_node(Type p_type, int p_id) {
 	_queue_update();
 }
 
+void VisualShader::replace_node(Type p_type, int p_id, const StringName &p_new_class) {
+	ERR_FAIL_INDEX(p_type, TYPE_MAX);
+	ERR_FAIL_COND(p_id < 2);
+	Graph *g = &graph[p_type];
+	ERR_FAIL_COND(!g->nodes.has(p_id));
+
+	if (g->nodes[p_id].node->get_class_name() == p_new_class) {
+		return;
+	}
+	VisualShaderNode *vsn = Object::cast_to<VisualShaderNode>(ClassDB::instance(p_new_class));
+	g->nodes[p_id].node = Ref<VisualShaderNode>(vsn);
+
+	_queue_update();
+}
+
 bool VisualShader::is_node_connection(Type p_type, int p_from_node, int p_from_port, int p_to_node, int p_to_port) const {
 	ERR_FAIL_INDEX_V(p_type, TYPE_MAX, false);
 	const Graph *g = &graph[p_type];
@@ -1605,6 +1620,7 @@ void VisualShader::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_valid_node_id", "type"), &VisualShader::get_valid_node_id);
 
 	ClassDB::bind_method(D_METHOD("remove_node", "type", "id"), &VisualShader::remove_node);
+	ClassDB::bind_method(D_METHOD("replace_node", "type", "id", "new_class"), &VisualShader::replace_node);
 
 	ClassDB::bind_method(D_METHOD("is_node_connection", "type", "from_node", "from_port", "to_node", "to_port"), &VisualShader::is_node_connection);
 	ClassDB::bind_method(D_METHOD("can_connect_nodes", "type", "from_node", "from_port", "to_node", "to_port"), &VisualShader::can_connect_nodes);
diff --git a/scene/resources/visual_shader.h b/scene/resources/visual_shader.h
index a38c2886e2..a20c0fe362 100644
--- a/scene/resources/visual_shader.h
+++ b/scene/resources/visual_shader.h
@@ -152,6 +152,7 @@ public:
 
 	int find_node_id(Type p_type, const Ref<VisualShaderNode> &p_node) const;
 	void remove_node(Type p_type, int p_id);
+	void replace_node(Type p_type, int p_id, const StringName &p_new_class);
 
 	bool is_node_connection(Type p_type, int p_from_node, int p_from_port, int p_to_node, int p_to_port) const;
 
diff --git a/scene/resources/visual_shader_nodes.cpp b/scene/resources/visual_shader_nodes.cpp
index 0550059c8b..40738973b4 100644
--- a/scene/resources/visual_shader_nodes.cpp
+++ b/scene/resources/visual_shader_nodes.cpp
@@ -30,6 +30,11 @@
 
 #include "visual_shader_nodes.h"
 
+////////////// Constants Base
+
+VisualShaderNodeConstant::VisualShaderNodeConstant() {
+}
+
 ////////////// Scalar(Float)
 
 String VisualShaderNodeFloatConstant::get_caption() const {
diff --git a/scene/resources/visual_shader_nodes.h b/scene/resources/visual_shader_nodes.h
index 39f463e1ef..14de360132 100644
--- a/scene/resources/visual_shader_nodes.h
+++ b/scene/resources/visual_shader_nodes.h
@@ -37,8 +37,27 @@
 /// CONSTANTS
 ///////////////////////////////////////
 
-class VisualShaderNodeFloatConstant : public VisualShaderNode {
-	GDCLASS(VisualShaderNodeFloatConstant, VisualShaderNode);
+class VisualShaderNodeConstant : public VisualShaderNode {
+	GDCLASS(VisualShaderNodeConstant, VisualShaderNode);
+
+public:
+	virtual String get_caption() const override = 0;
+
+	virtual int get_input_port_count() const override = 0;
+	virtual PortType get_input_port_type(int p_port) const override = 0;
+	virtual String get_input_port_name(int p_port) const override = 0;
+
+	virtual int get_output_port_count() const override = 0;
+	virtual PortType get_output_port_type(int p_port) const override = 0;
+	virtual String get_output_port_name(int p_port) const override = 0;
+
+	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 override = 0;
+
+	VisualShaderNodeConstant();
+};
+
+class VisualShaderNodeFloatConstant : public VisualShaderNodeConstant {
+	GDCLASS(VisualShaderNodeFloatConstant, VisualShaderNodeConstant);
 	float constant = 0.0f;
 
 protected:
@@ -67,8 +86,8 @@ public:
 
 ///////////////////////////////////////
 
-class VisualShaderNodeIntConstant : public VisualShaderNode {
-	GDCLASS(VisualShaderNodeIntConstant, VisualShaderNode);
+class VisualShaderNodeIntConstant : public VisualShaderNodeConstant {
+	GDCLASS(VisualShaderNodeIntConstant, VisualShaderNodeConstant);
 	int constant = 0;
 
 protected:
@@ -97,8 +116,8 @@ public:
 
 ///////////////////////////////////////
 
-class VisualShaderNodeBooleanConstant : public VisualShaderNode {
-	GDCLASS(VisualShaderNodeBooleanConstant, VisualShaderNode);
+class VisualShaderNodeBooleanConstant : public VisualShaderNodeConstant {
+	GDCLASS(VisualShaderNodeBooleanConstant, VisualShaderNodeConstant);
 	bool constant = false;
 
 protected:
@@ -127,8 +146,8 @@ public:
 
 ///////////////////////////////////////
 
-class VisualShaderNodeColorConstant : public VisualShaderNode {
-	GDCLASS(VisualShaderNodeColorConstant, VisualShaderNode);
+class VisualShaderNodeColorConstant : public VisualShaderNodeConstant {
+	GDCLASS(VisualShaderNodeColorConstant, VisualShaderNodeConstant);
 	Color constant = Color(1, 1, 1, 1);
 
 protected:
@@ -157,8 +176,8 @@ public:
 
 ///////////////////////////////////////
 
-class VisualShaderNodeVec3Constant : public VisualShaderNode {
-	GDCLASS(VisualShaderNodeVec3Constant, VisualShaderNode);
+class VisualShaderNodeVec3Constant : public VisualShaderNodeConstant {
+	GDCLASS(VisualShaderNodeVec3Constant, VisualShaderNodeConstant);
 	Vector3 constant;
 
 protected:
@@ -187,8 +206,8 @@ public:
 
 ///////////////////////////////////////
 
-class VisualShaderNodeTransformConstant : public VisualShaderNode {
-	GDCLASS(VisualShaderNodeTransformConstant, VisualShaderNode);
+class VisualShaderNodeTransformConstant : public VisualShaderNodeConstant {
+	GDCLASS(VisualShaderNodeTransformConstant, VisualShaderNodeConstant);
 	Transform constant;
 
 protected: