About Scramjets and Curves

[Zaddy23]

Hello! I've decided to tentatively dip my feet into the vast ocean that is this game's modding community, and for my first mod I decided to make a Scramjet style engine. (Basically a high thrust jet engine that only works at speeds above mach 3 and altitudes above 10km) I took the stock turbojet, and changed the .cfg file atmosphere and velocity curves so it now looks like this:

		velCurve
		{
			key = 0 0 0 0
			key = 0.2 0 0 0
			key = 0.72 0 0 0
			key = 1.36 0 0 0
			key = 2.15 0.1 0 0
			key = 3 3 0 0
			key = 4.5 5 0 0
			key = 5.5 0 0 0
		}
		atmCurve
		{
			key = 0 0 0 0
			key = 0.045 0.5 0 0
			key = 0.16 0.5 0 0
			key = 0.5 0.001 0 0
			key = 1 0 0 0

What I'd like to know is how should I change the final two values on each column, I made them zero just so I could see the numbers better, but I don't know what they actually do. Can anyone explain them to me? The values I have put seem to work, but there are hard cut-offs instead of smooth transitions. As in, the engine immediately leaps up from not working to suddenly working when mach 3 and 10km altitude is reached, and vice versa for the speed.

Any ideas?

[Porkjet]

The final two values are the in- and out-tangets of the curve, at 0 0 the tangent goes in and out flat horizontally for each key so not exactly a smooth transition.

I recommend to check out r4m0n's float curve editor for unity, it shows you a graph for your curve, lets you tweak and copy paste it. (remove empty spaces before keys when you use it)

Also, here's a handy guide on configuring air breathing engines including scramjets

[Zaddy23]

Also, here's a handy guide on configuring air breathing engines including scramjets

Aha, thanks! That helps a lot, I'm going to edit the values immediately next time I can be on KSP, thanks again!

[sashan]

Isn't there a curve editor in f12 debug menu of the game? Or was it added by some mod? My game has it.