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64 lines
3.5 KiB
XML
64 lines
3.5 KiB
XML
<?xml version="1.0" encoding="UTF-8" ?>
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<class name="VisualShaderNodeDerivativeFunc" inherits="VisualShaderNode" version="4.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
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<brief_description>
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Calculates a derivative within the visual shader graph.
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</brief_description>
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<description>
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This node is only available in [code]Fragment[/code] and [code]Light[/code] visual shaders.
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</description>
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<tutorials>
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</tutorials>
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<members>
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<member name="function" type="int" setter="set_function" getter="get_function" enum="VisualShaderNodeDerivativeFunc.Function" default="0">
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A derivative function type. See [enum Function] for options.
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</member>
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<member name="op_type" type="int" setter="set_op_type" getter="get_op_type" enum="VisualShaderNodeDerivativeFunc.OpType" default="0">
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A type of operands and returned value. See [enum OpType] for options.
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</member>
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<member name="precision" type="int" setter="set_precision" getter="get_precision" enum="VisualShaderNodeDerivativeFunc.Precision" default="0">
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Sets the level of precision to use for the derivative function. See [enum Precision] for options. When using the GL_Compatibility renderer, this setting has no effect.
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</member>
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</members>
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<constants>
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<constant name="OP_TYPE_SCALAR" value="0" enum="OpType">
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A floating-point scalar.
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</constant>
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<constant name="OP_TYPE_VECTOR_2D" value="1" enum="OpType">
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A 2D vector type.
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</constant>
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<constant name="OP_TYPE_VECTOR_3D" value="2" enum="OpType">
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A 3D vector type.
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</constant>
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<constant name="OP_TYPE_VECTOR_4D" value="3" enum="OpType">
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A 4D vector type.
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</constant>
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<constant name="OP_TYPE_MAX" value="4" enum="OpType">
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Represents the size of the [enum OpType] enum.
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</constant>
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<constant name="FUNC_SUM" value="0" enum="Function">
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Sum of absolute derivative in [code]x[/code] and [code]y[/code].
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</constant>
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<constant name="FUNC_X" value="1" enum="Function">
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Derivative in [code]x[/code] using local differencing.
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</constant>
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<constant name="FUNC_Y" value="2" enum="Function">
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Derivative in [code]y[/code] using local differencing.
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</constant>
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<constant name="FUNC_MAX" value="3" enum="Function">
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Represents the size of the [enum Function] enum.
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</constant>
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<constant name="PRECISION_NONE" value="0" enum="Precision">
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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 [code]dFdx()[/code] or [code]dFdy()[/code] in text shaders.
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</constant>
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<constant name="PRECISION_COARSE" value="1" enum="Precision">
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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 [constant PRECISION_FINE], but may not be suitable when more precision is needed. This is equivalent to using [code]dFdxCoarse()[/code] or [code]dFdyCoarse()[/code] in text shaders.
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</constant>
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<constant name="PRECISION_FINE" value="2" enum="Precision">
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The derivative will be calculated using the current fragment and its immediate neighbors. This tends to be slower than using [constant PRECISION_COARSE], but may be necessary when more precision is needed. This is equivalent to using [code]dFdxFine()[/code] or [code]dFdyFine()[/code] in text shaders.
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</constant>
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<constant name="PRECISION_MAX" value="3" enum="Precision">
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Represents the size of the [enum Precision] enum.
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</constant>
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</constants>
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</class>
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