Clamp 0 1 Scalar
Overview
The Clamp 0 1 family of nodes allow you to clamp, or restrict, the values of the colour or scalar coming into the Input between 0 and 1. If the value is less than 0 it will become 0. If the value is greater than 1 it will become 1. The clamping is done component-wise for colours. Here is an example using a colour with the following values:
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Input.red is -1
Input.green is 0.5
Input.blue is 2
After clamping the colour will have these values:
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Input.red becomes 0 (-1 was less than 0, so it becomes 0)
Input.green remains 0.5 (0.5 is between 0 and 1, so it's unchanged)
Input.blue becomes 1 (2 was greater than 1, so it becomes 1)
In the example below, an EXR image containing vector data is assigned to the Main Input of the Clamp 0 1 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 1 Scalar node outputs all negative values as 0, and any positive values above 1, as 1.
Settings:
- Name: This setting allows you to apply a descriptive name to the node, which can be helpful when using multiple Clamp 0 1 Scalar nodes in a project.
- Enable: When checked, the node is active and the negative Main Input values below 0 become 0, while values above 1 become 1. When unchecked, the Main Input value is passed through the node.