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Author Topic: Saturation  (Read 3294 times)

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Birdline

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Saturation
« on: November 23, 2008, 12:59:11 AM »
Hi all,
I wonder if it is possible to change the saturation of an object (or even the whole scene).
I mean to change it from color to grayscale (B&W).
Using the MakeRGBA or MakeHSL, only give me a color tint not a greyscale effect.

Best regards,
Spyros
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sychron

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Re: Saturation
« Reply #1 on: November 23, 2008, 10:26:48 AM »
Hmm, you're not alone with this problem: http://forum.dead-code.org/index.php?topic=2995.0
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sychron

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Re: Saturation
« Reply #2 on: November 23, 2008, 10:30:55 AM »
Hmm, both topics read as if the Engine uses HSV instead of HSL:
http://en.wikipedia.org/wiki/HSL_and_HSV
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Birdline

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Re: Saturation
« Reply #3 on: November 23, 2008, 01:23:09 PM »
As I understand it by making some tests,
The L value must be <255 to have any difference (so you will have always less brightness).
The S value must be >0 (so you can never have desaturation).
The H value sets the coloring (I think it is 0-360).
The image is made using
var SomeEntity = Scene.GetNode("book");
SomeEntity.AlphaColor = MakeHSL();



Best regards,
Spyros
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