Clamp 0 Scalar: 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:Clamp0Scalar_00_GUI.png|none|470px|Clamp 0 Scalar]] | |||
== Overview == | |||
The Clamp 0 family of nodes allow you to clamp, or restrict, the values of the colour or scalar coming into the Input so they are always at least 0. If the value is less than 0 it will become 0. All other values remain unchanged. This is useful for ensuring there are no negative numbers passing through a node network. | |||
The clamping is done component-wise for colours. Here is an example using a colour with the following values: | The clamping is done component-wise for colours. Here is an example using a colour with the following values: | ||
<ul> | |||
Input.red is -1 <br /n> | |||
Input.green is 0.5 <br /n> | |||
Input.blue is 2 <br /n> | |||
</ul> | |||
After clamping the colour will have these values: | |||
<ul> | |||
Input.red becomes 0 (-1 was less than 0, so it becomes 0) <br /n> | |||
Input.green remains 0.5 (0.5 is greater than 0, so it's unchanged) <br /n> | |||
Input.blue remains 2 (2 is greater than 0, so it's unchanged) <br /n> | |||
</ul> | |||
In the example below, an EXR image containing vector data is assigned to the Main Input of the Clamp 0 Scalar 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 Clamp 0 Scalar node outputs all negative values as 0. | |||
<ul> | |||
[[File:Clamp0Scalar.jpg|none|800px|Clamp 0 Scalar off and on. ]] | |||
</ul> | |||
''' Settings:''' | |||
*'''Name:''' This setting allows you to apply a descriptive name to the node, which can be helpful when using multiple Clamp 0 Scalar nodes in a project. | |||
*'''Enable:''' When checked, the node is active and the negative Main Input values below 0 become 0. When unchecked, the Main Input value is passed through the node. | |||
<br /n> | |||
[[Category: Clamp]] | [[Category: Clamp]] | ||
Revision as of 00:43, 4 February 2022
Overview
The Clamp 0 family of nodes allow you to clamp, or restrict, the values of the colour or scalar coming into the Input so they are always at least 0. If the value is less than 0 it will become 0. All other values remain unchanged. This is useful for ensuring there are no negative numbers passing through a node network.
The clamping is done component-wise for colours. Here is an example using a colour with the following values:
-
Input.red is -1
Input.green is 0.5
Input.blue is 2
After clamping the colour will have these values:
-
Input.red becomes 0 (-1 was less than 0, so it becomes 0)
Input.green remains 0.5 (0.5 is greater than 0, so it's unchanged)
Input.blue remains 2 (2 is greater than 0, so it's unchanged)
In the example below, an EXR image containing vector data is assigned to the Main Input of the Clamp 0 Scalar 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 Clamp 0 Scalar node outputs all negative values as 0.
Settings:
- Name: This setting allows you to apply a descriptive name to the node, which can be helpful when using multiple Clamp 0 Scalar nodes in a project.
- Enable: When checked, the node is active and the negative Main Input values below 0 become 0. When unchecked, the Main Input value is passed through the node.