how are the fluids calculated in the pipe do you have time for that dylan well wow that's a big question, we have every everything that's part of the simulation has a fluid box which is just a very small struct we compare the pressure differences which is based on the height and volume of each different box and propagates the pressure in a I think it's three passes now in different passes and create pressure groups so we know the top of the water so we can have the water push things down and we combine groups and ultimately derive the flow between the boxes from all the precalculated pressures and that is that that should be pretty obvious right sounds simple enough I don't understand why people have such a hard time getting that basically it's they're just simple boxes that have water in them or like a liquid and we use the volume the height and its previous flow rate and the pressure so like a pump adds pressure and so like when it compares the pipe that it's attached to it would say- I have this much pressure you have none okay I'm going to move liquid this is very laymen but move liquid from me into you because you're a low pressure front essentially and then it moves down the line but we have to do multiple passes to get it so that they can consider all sides, and it plans for different liquids to act differently I think they do they we they do kinda it's not that noticeable because you can't see them the like we do have viscosity properties on them, if this if they haven't changed this if design hasn't changed this but, if you it's weird when you initially hook up like to an oil line you will see that the oil takes longer to get to the end of the line if you did it identically with like a water pump it would take longer to get to the end of the long chain but yeah yes mostly it doesn't have a big impact on gameplay so it's a bit like factoria's pipe system with a twist and yes factoria's pipe system is a big inspiration to that actually yes or like at least the initial one well they I think we, started by reading their dev blogs about it too because they had a lot of like this didn't work this did so we wanted to see save a lot of work like believe it or not neither one of us had ever written a water pipe simulation before yeah it's not really something that comes up often but it's like where to begin it was actually it was a ton of fun working with the g2 on that yes I guess the main difference is that we've added another, dimension to it yeah that and that has caused a lot of a lot of our issues stemmed from that too yeah yeah having that verticality