Class VisualShaderNodeCustom
Virtual class to define custom VisualShaderNodes for use in the Visual Shader Editor.
- Inheritance
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VisualShaderNodeCustom
Remarks
By inheriting this class you can create a custom VisualShader script addon which will be automatically added to the Visual Shader Editor. The VisualShaderNode's behavior is defined by overriding the provided virtual methods.
In order for the node to be registered as an editor addon, you must use the @tool annotation and provide a class_name for your custom script. For example:
@tool
extends VisualShaderNodeCustom
class_name VisualShaderNodeNoise
See Also
Methods
_get_category
Qualifiers: virtualconst
Override this method to define the path to the associated custom node in the Visual Shader Editor's members dialog. The path may look like "MyGame/MyFunctions/Noise".
Defining this method is optional. If not overridden, the node will be filed under the "Addons" category.
String _get_category_get_code(String[], String[], int, int)
Qualifiers: virtualconst
Override this method to define the actual shader code of the associated custom node. The shader code should be returned as a string, which can have multiple lines (the """ multiline string construct can be used for convenience).
The input_vars and output_vars arrays contain the string names of the various input and output variables, as defined by _get_input_* and _get_output_* virtual methods in this class.
The output ports can be assigned values in the shader code. For example, return output_vars[0] + " = " + input_vars[0] + ";".
You can customize the generated code based on the shader mode (see Mode) and/or type (see Type).
Defining this method is required.
String _get_code(String[] input_vars, String[] output_vars, int mode, int type)Parameters
_get_default_input_port(int)
Qualifiers: virtualconst
Override this method to define the input port which should be connected by default when this node is created as a result of dragging a connection from an existing node to the empty space on the graph.
Defining this method is optional. If not overridden, the connection will be created to the first valid port.
int _get_default_input_port(int type)Parameters
typeint
_get_description
Qualifiers: virtualconst
Override this method to define the description of the associated custom node in the Visual Shader Editor's members dialog.
Defining this method is optional.
String _get_description_get_func_code(int, int)
Qualifiers: virtualconst
Override this method to add a shader code to the beginning of each shader function (once). The shader code should be returned as a string, which can have multiple lines (the """ multiline string construct can be used for convenience).
If there are multiple custom nodes of different types which use this feature the order of each insertion is undefined.
You can customize the generated code based on the shader mode (see Mode) and/or type (see Type).
Defining this method is optional.
String _get_func_code(int mode, int type)Parameters
_get_global_code(int)
Qualifiers: virtualconst
Override this method to add shader code on top of the global shader, to define your own standard library of reusable methods, varyings, constants, uniforms, etc. The shader code should be returned as a string, which can have multiple lines (the """ multiline string construct can be used for convenience).
Be careful with this functionality as it can cause name conflicts with other custom nodes, so be sure to give the defined entities unique names.
You can customize the generated code based on the shader mode (see Mode).
Defining this method is optional.
String _get_global_code(int mode)Parameters
modeint
_get_input_port_count
Qualifiers: virtualconst
Override this method to define the number of input ports of the associated custom node.
Defining this method is required. If not overridden, the node has no input ports.
int _get_input_port_count_get_input_port_default_value(int)
Qualifiers: virtualconst
Override this method to define the default value for the specified input port. Prefer use this over VisualShaderNode.set_input_port_default_value.
Defining this method is required. If not overridden, the node has no default values for their input ports.
Variant _get_input_port_default_value(int port)Parameters
portint
_get_input_port_name(int)
Qualifiers: virtualconst
Override this method to define the names of input ports of the associated custom node. The names are used both for the input slots in the editor and as identifiers in the shader code, and are passed in the input_vars array in VisualShaderNodeCustom._get_code.
Defining this method is optional, but recommended. If not overridden, input ports are named as "in" + str(port).
String _get_input_port_name(int port)Parameters
portint
_get_input_port_type(int)
Qualifiers: virtualconst
Override this method to define the returned type of each input port of the associated custom node (see PortType for possible types).
Defining this method is optional, but recommended. If not overridden, input ports will return the VisualShaderNode.PORT_TYPE_SCALAR type.
int _get_input_port_type(int port)Parameters
portint
_get_name
Qualifiers: virtualconst
Override this method to define the name of the associated custom node in the Visual Shader Editor's members dialog and graph.
Defining this method is optional, but recommended. If not overridden, the node will be named as "Unnamed".
String _get_name_get_output_port_count
Qualifiers: virtualconst
Override this method to define the number of output ports of the associated custom node.
Defining this method is required. If not overridden, the node has no output ports.
int _get_output_port_count_get_output_port_name(int)
Qualifiers: virtualconst
Override this method to define the names of output ports of the associated custom node. The names are used both for the output slots in the editor and as identifiers in the shader code, and are passed in the output_vars array in VisualShaderNodeCustom._get_code.
Defining this method is optional, but recommended. If not overridden, output ports are named as "out" + str(port).
String _get_output_port_name(int port)Parameters
portint
_get_output_port_type(int)
Qualifiers: virtualconst
Override this method to define the returned type of each output port of the associated custom node (see PortType for possible types).
Defining this method is optional, but recommended. If not overridden, output ports will return the VisualShaderNode.PORT_TYPE_SCALAR type.
int _get_output_port_type(int port)Parameters
portint
_get_property_count
Qualifiers: virtualconst
Override this method to define the number of the properties.
Defining this method is optional.
int _get_property_count_get_property_default_index(int)
Qualifiers: virtualconst
Override this method to define the default index of the property of the associated custom node.
Defining this method is optional.
int _get_property_default_index(int index)Parameters
indexint
_get_property_name(int)
Qualifiers: virtualconst
Override this method to define the names of the property of the associated custom node.
Defining this method is optional.
String _get_property_name(int index)Parameters
indexint
_get_property_options(int)
Qualifiers: virtualconst
Override this method to define the options inside the drop-down list property of the associated custom node.
Defining this method is optional.
PackedStringArray _get_property_options(int index)Parameters
indexint
_get_return_icon_type
Qualifiers: virtualconst
Override this method to define the return icon of the associated custom node in the Visual Shader Editor's members dialog.
Defining this method is optional. If not overridden, no return icon is shown.
int _get_return_icon_type_is_available(int, int)
Qualifiers: virtualconst
Override this method to prevent the node to be visible in the member dialog for the certain mode (see Mode) and/or type (see Type).
Defining this method is optional. If not overridden, it's true.
bool _is_available(int mode, int type)Parameters
_is_highend
Qualifiers: virtualconst
Override this method to enable high-end mark in the Visual Shader Editor's members dialog.
Defining this method is optional. If not overridden, it's false.
bool _is_highendget_option_index(int)
Qualifiers: const
Returns the selected index of the drop-down list option within a graph. You may use this function to define the specific behavior in the VisualShaderNodeCustom._get_code or VisualShaderNodeCustom._get_global_code.
int get_option_index(int option)Parameters
optionint