how can i replicate it?
On Jan 21, 7:49 am, Todd Burch - Katy, Texas wrote:
It's most likely just floating point precision rounding.
Todd
On Jan 20, 11:01 pm, "[email address]" wrote:
I'm trying to understand the transformation class. i wrote an observer
to display the transformation array whenever the entity changed. so i
created a cube and made it into a component and added my observer to
it. to start with, it looks like this (i also overloaded the to_s
function for transform)
[1.0, 0.0, 0.0, 0.0]
[0.0, 1.0, 0.0, 0.0]
[0.0, 0.0, 1.0, 0.0]
[0.0,0.0, 0.0, 1.0]
however after rotating +90 degrees and then back to its original the
matrix looks like this
[1.0, 0.0, 0.0, 0.0]
[0.0, 1.0, 0.0, 0.0]
[0.0, 0.0, 1.0, 0.0]
[6.48592290986016e-013,-6.7562622163564e-013, 0.0, 1.0]
the numbers are really tiny. so minuscule that it would never affect
calculations significantly but if i use transformation.origin i get
"Point3d(0, 0, 0)"
furthermore "ss.transformation.origin.x" yields
6.48592290986016e-013
so my first question, in a long list of questions, how does it know?
5 messages in com.googlegroups.sketchuprubyRe: floating point precision
