Fast 2D interpolation

[Worle]

That was exactly what I was after. Iteration time has dropped down to 0.017ms per iteration, and there is a little room for more improvement as well.

Thanks for that.

[Kevin_Price]

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I agree, altenbach's idea is much better than what I have done. I will give it a go tomorrow.

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When it comes to efficient code, that's pretty much always true for pretty much all of us.  😁  

-Kevin P