• Adobe After Effects Expressions

  Error fallback method(s)

  Posted by Jurgen Koch on September 23, 2020 at 2:00 pm

  My default template uses a ‘master color comp’ with a series of colors,  (ColorControl_01, ColorControl_02, etc) 

  Normally a project will start with a series of brand colors, and as it develops, the colors will shift slightly by way of the brand guidelines being updated by the client/agency. 

  I’ve been using a system that pulls the desired colors from the color comp with the expression:

  var colorNum = thisLayer.name.split(" ")[0];
  comp("_colorMaster").layer("ColorMaster").effect("ColorControl_"+colorNum)("Color");

  So the layer name determines the color of the fill, IF the first two characters of the layer name are numbers, followed by a space. What I would like to do is create a fallback so that if the layer name does NOT start with two numbers, it will disable the expression, (or render with #00FF33 ??)

  It seems to be an if/than situation, but evaluating the characters seems to be where I am getting stuck. 

  Thanks in advance

  Jurgen Koch replied 5 years, 11 months ago 1 Member · 1 Reply
• 1 Reply

• 

  Jurgen Koch

  September 23, 2020 at 3:53 pm

  solution from Rob Barrett:

  var colorNum = thisLayer.name.split(" ")[0];
  if (!isNaN(colorNum)) {
  comp("_colorMaster").layer("ColorMaster").effect("ColorControl_"+colorNum)("Color");
  } else {
  [0,255,0,255]
  };

  if the layer name starts with 01, 02, 03, 04, etc it will reference the color in the color master, otherwise, it gives is pure green

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