Pistons do not have smooth movements. But seeing as TPT already has pressure and velocity fields, why not allow piston to interact with them? Why not have a piston frame leave negative pressure behind and positive pressure in front? Piston could also create velocity fluctuations.

The implementation would require frame to track the distance that it travels. That way the frame could calculate the pressure (and velocity) to generate.

One use for this idea is a compressor. For simplification of the compressor, retraction of the piston would not cause a difference in pressure. This way, continuous pushing and pulling of pistons would create a build-up in pressure.

If you have seen the earthquake save that was on the front page for a short time, you would know the odd effect of piston – even though the motion was violent, big and sudden, the landscape of the city was practically untouched. If the pistons had have made velocity, the ground would have been severely damaged. Gas would also be effected in this way.

What do you think?

I thought the option panel was full as it is. Toggleable piston pressure would be OK. The effects would only be subtle with small devices.

yes, a life setting would be OK as well. I thought a compressor would be a good idea. (such a naughty sailor I am, basing a suggestion on one save idea...)