• Adobe After Effects

  steep of a curve to drive the color of a dot

  Posted by George Matthew on December 9, 2008 at 2:20 pm

  I have a blip animating along a curve. (A graph)
  The x axis of the graph has a pointer shape that gets its position[0] from the position[0] of the blip moving along the curve. What should I play around with in javascript to get an effect so that the pointer changes its color proportionately to the speed at which it moves?

  Thanks

  George Matthew replied 17 years, 7 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  December 9, 2008 at 3:11 pm

  You could add a fill effect to the pointer with an expression like this for the fill color:

  zeroSpeedColor = [1,0,0,1]; // red
  maxSpeedColor = [1,1,0,1]; // yellow
  maxSpeed = 500; // pixels per second

  linear(transform.position.speed/maxSpeed,0,1,zeroSpeedColor,maxSpeedColor)

  You’d need to adjust the colors and maxSpeed to suit your needs.

  Dan
• 

  George Matthew

  December 9, 2008 at 3:47 pm

  Thank you so much

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