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Transform Constraint

Intro​

Constrain one Shape to another.

UI​

Target - The Shape to constrain to.

Offset - Add/subtract a value to the Shape's original position.

Rest Position - The position a Shape will return to when Position Strength is set to 0.

Rest Offset - Add/subtract a value to the Rest Position.

Rest Rotation - The rotation your Shape will return to when Rotation Strength is set to 0.

Rotated Offset - Add/subtract a value to the Rest Rest Rotation.

Position Strength - A multiplier to Out Position. Adjusting this value will determine the position of your Shape along a vector between 0, 0 and the transform of your Target.

Out Position [read only] - Shows the [x, y] values being output by the Constraint. Where the Id connection combines both the x and y positions this attribute allows you to connect the separate [x, y] attributes to other layers.

Rotation Strength - A multiplier to Out Rotation.

Out Rotation - Connect this attribute to the rotation of another Shape.

Example

Pick up a Shape with another Shape:

The quick way:

  1. Follow steps 1-6 below (the long way).
  2. Move to frame 50.
  3. Select the Constraint.
  4. Navigate to Animation > Constraints > Transform Constraint Tools > Pick Up.
  5. Move to frame 150.
  6. Navigate to Animation > Constraints > Transform Constraint Tools > Drop

Now Hand should 'pick up' Ball at frame 50 and then 'drop' it again at frame 75.

The long way:

  1. Create 2 Shapes
  2. Name one 'Hand' and the other 'Ball'.
  3. Create a Transform Constraint.
  4. Connect constraint.outPosition→ball.position.
  5. Connect Hand as your Target. on the Constraint.
  6. Set 2 position.x keys (fr0 = -200, fr200 = 200) for Hand (animate it horizontally).
  7. Set Position Strength on the Constraint to 0 for both X and Y.
  8. On frame 50, copy Hand's Position X value and paste it into the Constraint's Rest Position X.
  9. Set a key on Rest Position X.
  10. Go back one frame.
  11. Set a key on Position Strength X with a value of 0.
  12. Go forward one frame.
  13. Set a key on Position Strength X with a value of 100.
  14. Go to the first frame.
  15. Hit play.

At frame 50 Hand should 'pick up' Ball.

  1. Move to frame 74.
  2. Set a key for Position Strength X (should be a value of 100).
  3. Move to frame 75.
  4. Copy Hand's Position X value and paste it into the Constraint's Rest Position X.
  5. Set a key on Rest Position X.
  6. Set a key for Position Strength X with a value of 0.
  7. Go to the first frame.
  8. Hit play.

Now Hand should 'pick up' Ball at frame 50 and then 'drop' it again at frame 75.