1 Sep
2010
1 Sep
'10
2:09 a.m.
Hi Ed,
On 31/08/10 15:31, Ed Kelly wrote:
Can anyone tell me how to calculate the 'shear' value (when using [shearYX] in Gem) from an angle (degrees or radians, I don't mind)?
This is just a guess, for one direction of shear in 2D space:
shear = tan(angle) (the angle marked ** in the ascii diagram below)
| __________ |**/ / | / / |/_________/
(because tan(0) = 0, tan(45deg) = 1, tan(90deg) = inf)
Otherwise try drawing triangles and doing some trigonometry (in a right-angle triangle: sin=opposite/diagonal cos=adjacent/diagonal tan=opposite/adjacent )