Brush size doesn't match quad size in Strokes

[jlampel]

The Strokes brush size doesn't really match the resulting quad size, which makes it really hard to guess how big or small I should make it when drawing a stroke.

Here is the brush size next to the size of the quad it produces:

It doesn't need to be exact, but cutting the brush size in half looks like it would be a lot closer to the right size.

It also seems to have a slightly different relationship to the size of new edges:

So even if I draw close to a perfect square, I get an uneven result:

[vxlcoder]

ah, this might be due to how I'm computing the initial number of segments... will work on this more.

not sure about straightness. will check in on this too