title: Can I call a shader with a different array for each call or should I make multiple shaders?
body: <p>I'm trying to determine the best way to handle custom dashed lines using shaders in Three.js (webgl). There are different patterns these dashed lines could have. I hope I am able to write a single shader that could handle any kind of dash pattern. The pattern would be given by an array of values (eg <code>[0.125, -0.125, 0.250, -0.250]</code>), where a negative value is the length of a space, and positive is the length of a dash.</p>
  
  <p>I'm new to shaders and I'm not sure if the above is possible. If I understand correctly, a uniform array would not be appropriate because I want this array to change according to the pattern being drawn on a particular line entity. But I don't think an attribute array would be appropriate because that seems to be an array of values that associate with vertices. So is what I want to do possible or do I have to dynamically make shaders for each pattern?</p>
  
  <p>Am I understanding this correctly so far? Any suggestions? This is my first (and hopefully only) need to work with shaders.</p>