title: From Rectangle into trapezoid
body: <p>how can i transform rectangle into trapezoid with ActionScript3</p>
  
  <p>my trapezoid is a floor of 3D room, and i want to texturize it (bitmap tile).</p>
  
  <pre><code> _____________
  |  |     |   |
  |  |_____|   |
  |  /      \  |
  | / trapez.\ |
  |/__________\|
  </code></pre>