Hi,<div><br></div><div>I'm building a drawing application for the iPad and I'm having some problems building erase into it. <span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; ">I'm using fillOval:fillStyle: and drawPolygon:fillStyle: for drawing normally and I'd like to use the same methods for erasing. Unfortunately, when I put in (Color transparent) as the fillStyle, it doesn't do anything. I believe this is because it is acting as a paint over combination rule. So, original + transparent = original. What I want is that the transparent color takes the place of the original color. Any advice on how to do this?</span></div>
<div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; "><br></span></div><div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; ">Thanks,</span></div>
<div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; "><br></span></div><div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; ">Jeff</span></div>
<div><br>-- <br>Jochen "Jeff" Rick, Ph.D.<br><a href="http://www.je77.com/">http://www.je77.com/</a><br>+44(0)1908 332 451 (work)<br>Skype ID: jochenrick<br>
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