[Bf-cycles] Motion blur related typo?

Brecht Van Lommel brechtvanlommel at pandora.be
Sun Nov 11 13:15:18 CET 2012

On Sun, Nov 11, 2012 at 5:58 AM, storm <kartochka22 at yandex.ru> wrote:
> I get it, but my little scene looks more correct with that "fix", maybe
> because changing only w in 4D projective space will make strange big
> blur along axis ? Maybe do not touch "decompose.y" at all?

It has nothing to do with projective space, it's just a quaternion,
translation and 3x3 scale matrix that are packed into a 4x4 array.
Stupid trick to store decomposed matrix in a regular 4x4 matrix.

> В Вс., 11/11/2012 в 04:07 +0100, Brecht Van Lommel пишет:
>> quick arc-length parametrization of the curve
> http://math.stackexchange.com/questions/12186/arc-length-of-bezier-curves
> Really hard task, elliptic integrals, something that i prefer to skip :P

Yeah, these formulas are complicated, it's not going to be very fast.


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