How do I resize only interpolating à la VirtualDub?

[Soulvomit]

How do I achieve VirtualDub's "Bicubic (interpolation only)" as well as "Bilinear (interpolation only)" with AviSynth? I like its bicubic resizer in this mode because it seems to preserve the sharpness of the source more faithfully than any of the other ones I've ever tried when downscaling but its resizers don't preserve the center. I've been messing with bicubicresize's b and c so far and something like -1.375 and 0 comes close but, honestly, I don't know what the heck I'm doing, heh. No idea about bilinear either.

[SuperLumberjack]

I'm interested too ! :)

Thanks ! ;)

[SuperLumberjack]

I wonder if it's not equivalent to Catmull-Rom :o :

BicubicResize(b=0, c=0.5, target_width, target_height)