Lerp Function Creator (LFC) is a simple but powerful tool to create a Linear Interpolation Curve (Lerp Curve) in C++/Lua.
Go on over to the Releases page to get a Windows Binary.
Steps are a fancy way of saying "If statements," simply put:
They are conditions to alter the graph. Example, if the t (the x cord) is less than 1, take the current t and pow it to itself
Then you could also add another step to subtract everything if it's less than 1 by 0.5 to lower the entire graph.
One thing you will notice is the graph isn't 100% accurate. Mostly because windows forms isn't that great of a graphing tool, sorry about that!
But it should give you the jist of what it would do.
Check out the bottom right for the code. This code should be ready to be pasted into C++ or Lua. You then plug this into a lerp function and then you have your custom lerp!