Nuke Expressions

=Expressions=

time

 * linking time curves:
 * To get a simple increase or decrease animation over time you can use the following expression: frame*a  With a being the speed. The higher the number the faster the value rises. Negative numbers will decrease the value over time. With a=1 the value will increase by 1 every frame.

animation

 * wave expressions: []

Parenting
Go to the knob you want to be the child and select Add Expression in the right-click menu. nodeName.knobName or nodeName.knob.knobname Example: FrameHold2.knob.first_frame or FrameHold2.first_frame

=Expression Node= This node can use expressions to describe channels. It can easily swap channels around or make things like ramps and circles.
 * input options (foundry documentation):
 * examples:
 * you can use values from other nodes in your expression node. Just type: nodeName.knobName ,for example transform1.scale

wave
sin(x/100)+y/10-100