Re: [PD] Gem axis

cyrille henry wrote:

hello

hi.

just a quick comment, as i believe, from nico's last email, that it is not clear why "this works and that does not"

if

gemhead | translate | rotate | square

does not work,

this is *wrong*, it works!!!

try :

gemhead | rotate | translate | square

this works "too", but both patches are _different_

transformation order is important.

this is the magic!

imagine following:

1. you are standing at the "origin"; you turn 90° to the right; you walk

5 steps forward 2) you are standing at the "origin"; you walk 5 steps forward; you turn 90° to the right

now think: is the result of 1) and 2) the same ? (this is: after the 2 "transformations", are you standing at the same spot and are you looking in the same direction ?)

this is the way, openGL works

mfg.cas..r IOhannes