title: GLSL Double Precision Angle, Trig and Exponential Functions Workaround
body: <p>In GLSL there's rudimentary support for double precision variables and operations which can be found <a href="http://www.opengl.org/registry/specs/ARB/gpu_shader_fp64.txt" rel="nofollow">here</a>. However they also mention "Double-precision versions of angle, trigonometry, and exponential
      functions are not supported.".</p>
  
  <p>Is there a simple workaround for this, or do I have to write my own functions from scratch? </p>