VisualShaderNodeDerivativeFunc¶

Inherits: VisualShaderNode < Resource < RefCounted < Object

Calculates a derivative within the visual shader graph.

Description¶

This node is only available in Fragment and Light visual shaders.

Properties¶

Function	function	`0`
OpType	op_type	`0`
Precision	precision	`0`

Enumerations¶

enum OpType:

OpType OP_TYPE_SCALAR = 0

A floating-point scalar.

OpType OP_TYPE_VECTOR_2D = 1

A 2D vector type.

OpType OP_TYPE_VECTOR_3D = 2

A 3D vector type.

OpType OP_TYPE_VECTOR_4D = 3

A 4D vector type.

OpType OP_TYPE_MAX = 4

Represents the size of the OpType enum.

enum Function:

Function FUNC_SUM = 0

Sum of absolute derivative in x and y.

Function FUNC_X = 1

Derivative in x using local differencing.

Function FUNC_Y = 2

Derivative in y using local differencing.

Function FUNC_MAX = 3

Represents the size of the Function enum.

enum Precision:

Precision PRECISION_NONE = 0

No precision is specified, the GPU driver is allowed to use whatever level of precision it chooses. This is the default option and is equivalent to using dFdx() or dFdy() in text shaders.

Precision PRECISION_COARSE = 1

The derivative will be calculated using the current fragment's neighbors (which may not include the current fragment). This tends to be faster than using PRECISION_FINE, but may not be suitable when more precision is needed. This is equivalent to using dFdxCoarse() or dFdyCoarse() in text shaders.

Precision PRECISION_FINE = 2

The derivative will be calculated using the current fragment and its immediate neighbors. This tends to be slower than using PRECISION_COARSE, but may be necessary when more precision is needed. This is equivalent to using dFdxFine() or dFdyFine() in text shaders.

Precision PRECISION_MAX = 3

Represents the size of the Precision enum.

Property Descriptions¶

Function function = 0

void set_function ( Function value )
Function get_function ( )

A derivative function type. See Function for options.

OpType op_type = 0

void set_op_type ( OpType value )
OpType get_op_type ( )

A type of operands and returned value. See OpType for options.

Precision precision = 0

void set_precision ( Precision value )
Precision get_precision ( )

Sets the level of precision to use for the derivative function. See Precision for options. When using the GL Compatibility renderer, this setting has no effect.