Circular scattering pattern

[szapp]

Right now the scattering pattern is in a diamond (see below). This should be adjusted into a circle or ellipse.

Also check the rgn: The center seems to be less populated.

[szapp]

As of now the second angle (y-axis) is constrained by the first (x-axis) is like this, resulting in an diamond shape: maxscatter-x (maxscatter = 3.0):

How about sqrt(maxscatter^2 - angleY^2) ? Yes that should work, for maxscatter = 3.0 it looks like this:

angleMax = roundf(sqrtf(subf(sqrf(mkf(angleMax)), sqrf(mulf(angleY, mkf(1000)))))); // sqrt(angleMax^2-angleY^2)

[szapp]

Fix #48 #50 scatter