Ways to control color of a circle TOP

Beginners
1

Hi All,

I have a simple network with a circle TOP that I move around using my tablet, with a feedback loop to add some effects. I would like to know how I can control the circle’s color. I know, because I’ve been watching a lot of tutorials, that I can feed numerical values to r, g and b, e.g. via a LFO or an absTime expression. I would like more options, such as:

  • Manually controlling the color via a HSV slider. I found out how to do it with the palette’s RGB slider, but I would feel more comfortable with HSV. I just can’t figure out how to convert the HSV values to RGB.
  • Mapping a 2D texture, so that the color of my circle changes depending on where it is on the screen.
  • If you have other suggestions I’m willing to listen!

Thanks in advance for your help
Florence

2

Hello! You can use HSV Adjust TOP, Hue Offset to change the Hue of the circle (make sure the circle isn’t white). For mapping question I’d use a gradient as a background and connect circle and this gradient into Composite TOP Inside operation.

Or you can use CHOPs + HSV Adjust TOP: add a Constant CHOP, 2 channels, reference X and Y coords of a Circle TOP into them (for example op(‘transform1’).par.tx). Then use Math CHOP, Combine Channels Add, and in the Range tab change the From Range into -0.5 0.5 To Range into 0 180. Then reference this value into Hue Offset of HSV Adjust TOP

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3

Thank you for these suggestions! I will experiment with all of them. There is so much to do and learn, it’s hard to know where to start :grin: