COMMLAB WEEK 04 Motion and Time

1. Time Expression

• parent the ball with a null in the center
• add time expression to the null object’s Z rotation with an expression time *(360/5)
• the ball rotates 360 degrees in 5 seconds

2. PosterizeTime + Wiggle

• PosterizeTime() is an expression that will return a value every X number of frames
• Expression on the position of the shape layer:
• f = 2;
  a = 100;
  posterizeTime(f);
  wiggle(f, a);

3. Invert Opacity

• make one layer INVERT the opacity of another layer. When Layer A is 100, Layer B will be 0. Very useful for blinking animations.
• t = thisComp.layer(“Back”).transform.opacity // Pickwhip the layer you want to invert
  linear(t,0,value,100,0)