Abs Colour: Difference between revisions
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<div style="float:right; border-style:solid; padding:20px"><categorytree mode=pages hideroot=off>Clamp</categorytree></div> | |||
[[File:ABSColour_00_GUI.png|none|470px|Abs Colour]] | |||
== Overview== | |||
The Abs family of nodes allow you to find the absolute value of the colour/scalar/vector coming into the Input. The absolute value of a number is its value regardless of whether it is positive or negative. In practice, this means the absolute value is always a positive number. For example: | The Abs family of nodes allow you to find the absolute value of the colour/scalar/vector coming into the Input. The absolute value of a number is its value regardless of whether it is positive or negative. In practice, this means the absolute value is always a positive number. For example: | ||
<ul> | |||
The absolute value of 4 is 4 <br /n> | |||
The absolute value -2 is 2 <br /n> | |||
The absolute value of 0 is 0 <br /n> | |||
</ul> | |||
This function works in a component-wise fashion for colours and vectors, so using vectors as an example : | |||
<ul> | |||
( 2.1, -6, 4 ) becomes ( 2.1, 6, 4 ) <br /n> | |||
( -10, -3, -2 ) becomes ( 10, 3, 2 ) <br /n> | |||
<br /n> | |||
[[File:ABSfamilyOfNodes_Chart.png|none|800px|The ABS family of nodes always returns a positive number for a given input.]] | |||
</ul> | |||
In the example below, an EXR image containing vector data is assigned to the Main Input of the ABS Colour node. Visually, the green pixels represent data above a value of 0 in the Y axis, whereas the magenta pixels indicate a blend of positive and negative values lying on the X and Z axis. When enabled, the ABS Colour node outputs all values as positive values. | |||
<ul> | |||
[[File:AbsColour.jpg|none|800px|The ABS Colour node outputs all values as positive values. Any negative values below 0, are returned as positive values above 0.]] | |||
</ul> | |||
'''Settings:''' | |||
*'''Name:''' This setting allows you to apply a descriptive name to the node, which can be helpful when using multiple Abs Colour nodes in a project. | |||
*'''Enable:''' When checked, the node is active and the absolute value from the Main Input is output. When unchecked, the Main Input value is passed through the node. | |||
<br /n> | |||
[[Category: Clamp]] | [[Category: Clamp]] | ||
Latest revision as of 20:27, 21 February 2022
Overview
The Abs family of nodes allow you to find the absolute value of the colour/scalar/vector coming into the Input. The absolute value of a number is its value regardless of whether it is positive or negative. In practice, this means the absolute value is always a positive number. For example:
-
The absolute value of 4 is 4
The absolute value -2 is 2
The absolute value of 0 is 0
This function works in a component-wise fashion for colours and vectors, so using vectors as an example :
-
( 2.1, -6, 4 ) becomes ( 2.1, 6, 4 )
( -10, -3, -2 ) becomes ( 10, 3, 2 )
In the example below, an EXR image containing vector data is assigned to the Main Input of the ABS Colour node. Visually, the green pixels represent data above a value of 0 in the Y axis, whereas the magenta pixels indicate a blend of positive and negative values lying on the X and Z axis. When enabled, the ABS Colour node outputs all values as positive values.
Settings:
- Name: This setting allows you to apply a descriptive name to the node, which can be helpful when using multiple Abs Colour nodes in a project.
- Enable: When checked, the node is active and the absolute value from the Main Input is output. When unchecked, the Main Input value is passed through the node.