title: Drawing a line in iPhone / iPad
body: <p>I would like to develop an app when the user can draw lines... but I do not want to draw straight lines but want to show the line as the users draws it. When the user gets from point A to B I would like to straighten the line (if the users wants this).</p>
  
  <p>To be able to do this I want to change my view into a grid starting at 0,0 (top left) and ending at 320,480 (for iPhone) and 768,1024 (for iPad) (bottom right).</p>
  
  <p>For this question I have point A at 10,10 and point B at 100,100.</p>
  
  <p>My question:<br/>
   - How do I create this grid?<br/>
   - How do I create these points?<br/>
   - How do I draw this line without straightening it?<br/>
   - How do I draw the straighten line?<br/></p>
  
  <p>My problem is that I am familiar with creating "normal" UI apps. I am not familiar with Open-GL ect.</p>
  
  <p>I hope someone can help me with this.</p>
  
  <p>Best regards,<br/>
  Paul Peelen</p>