July 7, 2010
10:28 p.m.
On 08.07.2010 00:26, Henrik Sperre Johansen wrote:
On 08.07.2010 00:11, Stéphane Ducasse wrote:
Hi
(10@20) rotateBy: #left centerAt: 0 @0 returns 20@ -10
and my math tells me that this is a rotation to the right.
Am I correct? Then why I'm wrong? screen coordinates vs. math coordinate?
Stef You rotate around the center, left is compared to the center -> point vector, not the other way around.
Cheers, Henry ... assuming you use screen coordinates of course, starting at top left :)