On 03.01.2010, at 00:45, Rob Keniger wrote:
It will probably be easier to create an NSAffineTransform and
translate the whole context by 0.5px, so all drawing is offset
without you needing to fiddle with individual values.
Just a hint:
NSBezierPath has a method which allows to use NSAffineTransform for
this even outside a rendering/drawing process:
Description of transformUsingAffineTransform, a method of NSBezierPath:
Transforms all points in the receiver using the specified transform.
- (void)transformUsingAffineTransform:(NSAffineTransform *)aTransform
Example:
NSBezierPath *bPath = // create a path
// construct the complete path
NSAffineTransform *transform = [NSAffineTransform transform];
// move all coordinates to the center of the pixels
[transform translateXBy: 0.5 yBy: 0.5 ];
[bPath transformUsingAffineTransform:transform];
// bPath is now ready for drawing
--
Heinrich Giesen
gies...@acm.org
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