Re: Why CGPathAddCurveToPoint returns to the origin?
Re: Why CGPathAddCurveToPoint returns to the origin?
- Subject: Re: Why CGPathAddCurveToPoint returns to the origin?
- From: Gustavo Pizano <email@hidden>
- Date: Fri, 5 Mar 2010 19:07:05 +0100
Hello Duncan.
I want to draw the inside of a UIButton with a gradient, so I just place in IB a Cusotm Buttom, and in the drawRect I taking its bounds, and from there Im getting the midX,minX etc.
So let me see if I get this straight, and rechecking the docs,.
OHHHHH OMG!!
I m such an idiot, I was using the wrong method, I needed the CGContextAddArcToPoint,...
my mistake... sorry
Thx
Gustavo
On Mar 5, 2010, at 6:46 PM, David Duncan wrote:
> On Mar 5, 2010, at 5:45 AM, Gustavo Pizano wrote:
>
>> EHH nop sorry, I fixed and still I get the nice flower..
>> CGContextBeginPath(currentContext);
>>
>> CGContextMoveToPoint(currentContext,midX,minY);
>> CGContextAddCurveToPoint(currentContext, maxX , minY, maxX, midY , 2.0f, 2.0f);
>> CGContextAddCurveToPoint(currentContext, maxX, maxY, midX, maxY, 2.0f, 2.0f);
>> CGContextAddCurveToPoint(currentContext,minX , maxY, minX, midY, 2.0f, 2.0f);
>> CGContextAddCurveToPoint(currentContext, minX, minY, midX,minY, 2.0f, 2.0f);
>>
>> CGContextClosePath(currentContext);
>>
>> CGContextClip(currentContext);
>> .....
>> Any ideas?
>
>
> First off, what are you trying to draw?
>
> The reason why you are getting a nice flower-ish pattern is because you are asking all of your curves to trace through 2 points and end at the same location (2,2). CGContextAddCurveToPoint generate a bezier curve that starts at the current location, approaches the 2 control points (which are your various combinations of min/mid/max x/y) and ends at the end point (which is always 2,2).
> --
> David Duncan
> Apple DTS Animation and Printing
>
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