title: Resize rectangle corner
body: <p>I'm working on an image editor, there are some shape controls like rectangle, eclipse etc with drag drop feature on canvas and they are re-sizable(one corner is fixed, other three are re-sizable), attached a screen shot below:</p>
  
  <p><img src="https://i.stack.imgur.com/hyLnK.png" alt="enter image description here"></p>
  
  <p>I'd like to only resize the seleted corner, other three will be fixed, any ideas? </p>
  
  <p><strong>DaveRook Edit</strong></p>
  
  <p>In Photoshop, this is achieved by <a href="http://csscreme.com/tutorials/photoshop-tutorials/warp_tool_effect_photoshop_tutorial" rel="nofollow noreferrer">wrapping</a> (under transforms)! This means re-drawing that corner un-proportionally to the rest of the image.</p>