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50 lines
1.9 KiB
Markdown
50 lines
1.9 KiB
Markdown
# Light Flicker Component
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This component adds the ability to generate a light flicker value, which can be plugged into light intensities, or material parameters, or anything else you want.
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It works on the same basis as Quake, Half Life: Alyx and countless other games; there is a "flicker string" made up of lower-case letters a-z, where a = 0, m = 1 and z ~= 2 (actually 2.08 in practice), meaning the default value range is from completely off, to double brightness.
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You can use all the [Quake in-built flicker patterns](https://github.com/id-Software/Quake/blob/bf4ac424ce754894ac8f1dae6a3981954bc9852d/qw-qc/world.qc#L328-L372), or make your own.
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## Adding the component
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The flicker component is a non-scene component that can be added to any actor, just search for "Steves Light Flicker"
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## Configure it
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### Patterns and Min/Max
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If you select "Custom" in the flicker pattern field, you need to supply your own string of a-z characters in "Custom Flicker Pattern". With the default min/max of 0-2 the character values are:
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| Char |Value|
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|a|0|
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|m|1|
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|z|2.08|
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The max is slightly over 2 as you can see, that's because to make 'm' (char index 12) exactly 1 the divisor has to be 24, meaning 'z' as character 25 is slightly over ('y' is actually 2).
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You can change the output range from the default of 0-2 if you want, just remember that 'z' will slightly exceed the max.
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### Speed
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By default as with Quake every character in the pattern applies for 0.1s. Change the speed multiplier if you want that to be different.
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### AutoPlay
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Whether to start playing the flicker immediately, or whether to await a call to `Play()`.
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> When not playing, the component does not tick.
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## Using the Output
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The component will just output values when it's played on the OnLightFlicker event:
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It's up to you to feed these into light intensity values, material parameters etc.
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