title: What's the equation behind the 4x4 transformation matrix used in CSS3 / SVG?
body: <p>Both <a href="http://www.w3.org/TR/SVG-Transforms/#threed-matrix-definition" rel="nofollow noreferrer">SVG</a> and <a href="http://www.w3.org/TR/css3-3d-transforms/#funcdef-matrix3d" rel="nofollow noreferrer">CSS3</a> specs talk about 4x4 matrixes for transformations in many ways.</p>
  
  <p>But I can't find a comprehensive base-formula, such as <a href="http://www.w3.org/TR/SVG/coords.html#EstablishingANewUserSpace" rel="nofollow noreferrer">this 3x3 formula for SVG</a>:</p>
  
  <p><img src="https://i.stack.imgur.com/NG5wM.png" alt="3x3 Transformation Matrix formula according to SVG spec"></p>
  
  <p>Are there any resources on this or is it not that simple with a 4x4 matrix?</p>