On 4/2/07, Bryce Harrington <bryce@...983...> wrote:
No, it's a non-linear (exponential?) relation that was arrived at through feedback from user testing and experimentation.
No. There was only one user advocating the exponential scale, but his patch did not convince me. Anyone is welcome to try out the patch in our patch tracker; if the majority votes for it I'll go with it.
So currently, the scale is linear, and the range is explained in the 0.45 release notes:
The blur value is a percentage, with 100% corresponding to a blurring radius (standard deviation of Gaussian function) of 1/8 of the object's bounding box' perimeter (that is, for a square, a blur of 100% will have the radius equal to half a side, which turns any shape into an amorphous cloud).
http://wiki.inkscape.org/wiki/index.php/ReleaseNotes045#SVG_filters:_Gaussia...