It's a really nice user interface. The 2d view has a few limitations though. It could do with the ability to swap the control points on the 2d view at a click

It's a really nice user interface. The 2d view has a few limitations though. It could do with the ability to swap the control points on the 2d view at a click of a button. Similarly the preview of functions could do with showing either a 2d view or a line at a slice along any line. Currently you can see only a slice across which means a sine wave going down looks like a straight line on 1d view. Letting you pick a slice line would let you see the wave preview more closely to what it actually is. For example a sine wave at a 45 degree angle could be represented as such in the preview. In the 2d view there is even a space available for showing the wave at an arbitrary cross-section. The layout is [ X __ ] [ 2D Y ] In the __ area you could have a cross section line dragger.