Hi Folks, I'm new to this forum.

Can anyone help with a vector spiral script?

The logarithmic spiral is ideal to create a profile of the centrifugal fan scroll. I have seen the spiral from Mike Williams but this creates a raster line.

I have superimposed a vector (over the raster) and with a few asymmetric nodes, it is not hard to match the curve manually.

Question: Does anyone know the math of where to add nodes and what the slopes should be.

I'm looking for Paint Shop Pro X2 vector script ideas.