a non-linear increasing range of numbers, with a bias towards the beginning.
Generates a linear range on [0,1] with |num_steps|, then squares all the values to make the curve be quadratic, thus biasing towards 0, but remaining on the [0, 1] range. This biased range is then scaled to the desired range using lerp. Different curves could be generated by changing c, where greater values of c will bias more towards 0.
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