Rainbow effect

Questions on Palette and Light Palette operation and features
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TaineGilliam
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Rainbow effect

Post by TaineGilliam » Mon Sep 22, 2008 12:31 pm

I'm trying to create what I hoped was a simple rainbow effect but It is stumping my this Monday morning.

I have a group of RGB fixtures arraigned in a circle, I am hoping to create a rolling rainbow - the spectrum wrapping the circle once and rolling along.

First, I'm having trouble getting just one wrap of the spectrum for the selected fixtures.

Second, the rainbow chase is going ROYGBIV VIBGYOR... instead of ROYGBIV ROYGBIV...

I'm sure there are parameters to adjust to solve this but I can't sort it out - a little help, please.

Taine

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RobertBell
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Re: Rainbow effect

Post by RobertBell » Mon Sep 22, 2008 12:53 pm

The issue you are having is that we created the rainbow using a SINE on Hue (with saturation at 100% and Luminance at 50% - solid).

If you go through hue from 0% to 100% then (in a sine wave) back from 100% to 0%, you get what you don't like. The thing to remember is that a Hue of 0% and 100% are both Red. So, you can jump from 100% to 0% and not notice the colour shift (your wrap around).

So - to do what you want, set Hue to 0%, Sat to 100% and Lum to 50%. Then add a Ramp Up wave on Hue and adjust the offset (between fixtures) to about 7% then adjust the rate.
Robert Bell - Product Manager - Horizon Control Inc.

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BrianEvans
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Re: Rainbow effect

Post by BrianEvans » Mon Sep 22, 2008 4:22 pm

Also, once you change the waveform to "ramp up", you can change the size to "variable",
and really pinpoint where in the spectrum the effect happens.
Brian Evans - System Specialist - Horizon Control Inc.

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