Hi
I am creating a particle system using particles gpu, where the particles size is determined by its velocity. See image below.
This looks ok, but I would like to be able to control the actual size of the particles more by applying some sort of scale.
I see there is a size look up chop. Is this where I can adjust this? If so, what are the practical steps to adjusting this? What chop would I use and how?
Hi @bensharpe,
the Size Lookup CHOP could be something like a ramp or a some custom curve generated with a S Curve CHOP or a Pattern CHOP. The idea is that the normalized velocity is a lookup into the supplied curve.
As velocity can have any value, there is a Velocity Remap parameter further down below helping with scaling the velocity. Helping to find the right values for this is the System Max Velocity parameter. In your case, it is currently showing a value of approx. 1.4 so you can use that value to set the second parameter of the Velocity Remap. This will now remap the velocity from 0 to 1.4 to 0 to 1 and use it as the lookup into the CHOP specified in the Size Lookup (CHOP) parameter.
Hope this makes sense
cheers
Markus
Hi Markus. Thanks for the reply. Yes S-Curve was just what I was looking for. Explanation also really help ed out.
Ben
