Minute misalignment creates big problems

[TDahl]

@JustinTSE

I’m sure there’s a good reason for it, but it’s just kind of an odd thing to me

At heart is the way that floating point numbers (e.g., as used to store 3D coordinate point values) have been represented in computers for decades. Here is another post in which I talked about this issue:

Intersect Faces causes triangulation

A factor which impacts this behavior is that the numeric value of zero can be represented EXACTLY in the standard IEEE floating-point format, whereas virtually no other whole numbers can be represented EXACTLY (nor can nice fractions or even low-precision small decimal values, such as 1/3 or 0.1 or 0.01 or 0.001). The magic and the drawback of the floating-point format is that the values which can be represented EXACTLY are discretely and non-uniformly distributed on the number line, packed fa…