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SIGN

The SIGN node in Magick is a utility node that determines the sign of a floating-point number. It takes a single input value and outputs a value indicating whether the input is positive, negative, or zero.

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Inputs

  • a (float): The input value for which to determine the sign. Default value is 0.

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Outputs

  • result (float): The sign of the input value. Possible values are:
    • 1.0 if the input is positive
    • -1.0 if the input is negative
    • 0.0 if the input is zero

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Configuration

This node has no additional configuration options.

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Usage

To use the SIGN node:
  1. Connect the floating-point value you want to analyze to the a input.
  2. The result output will emit 1.0, -1.0, or 0.0 depending on the sign of the input value.

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Example

Here’s an example of how the SIGN node can be used in a Magick spell:
In this example, the SIGN node is used to determine the sign of the constant value 3.14. Since 3.14 is positive, the SIGN node will output 1.0.

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Best Practices

  • Use SIGN when you need to make decisions or route values based on whether a number is positive, negative or zero.
  • Remember that SIGN treats 0.0 as a special case, distinct from positive and negative numbers.

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Gotchas

  • SIGN only works with floating-point numbers. If you need to determine the sign of an integer, first convert it to a float.
  • Be careful not to confuse the output of 0.0 (indicating a zero input) with a false or null value. The output is still a float.