Re: drawing 1 pixel wide lines
Re: drawing 1 pixel wide lines
- Subject: Re: drawing 1 pixel wide lines
- From: Nathan Day <email@hidden>
- Date: Thu, 8 Aug 2002 11:03:29 +0930
add 0.5 to the x component of p1 and p2, the coordinate system uses
floats so whole number values represent the border between two pixels,
you want to draw in the middle of a pixel so it +0.5.
On Thursday, August 8, 2002, at 04:43 AM, Albert Russel wrote:
How do you draw 1 pixel wide completely black vertical lines?
[NSBezierPath setLineWidth: 0.0];
[NSBezierPath setDefaultFlatness: 1.0];
[NSBezierPath setLineCapStyle: NSButtLineCapStyle];
[[NSColor blackColor] set];
[NSBezierPath strokeLineFromPoint: p1 toPoint: p2];
The above gives vertical lines that are more than 1 pixel wide, I
believe to
see 2, and the lines are a little transparent. I select the color black
but
the lines are gray. When I draw 2 lines at the same position it gets
black.
Nathan Day
http://homepage.mac.com/nathan_day/
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