You
can easily add springs to strokes with tubes to give the tubes reactive, interconnected
motion. By animating the movement of the surface with the springed
tubes on it, the tubes will react appropriately.
When you add spring behavior
to a stroke, Paint Effects creates an expression that
makes the tubes behave like springs. You can edit this expression
in the Expression editor.
To add spring behavior to brushes
- Select the stroke. The stroke must be
on a paintable surface. For details, see
Paint on objects.
- Select
Paint Effects > Brush Animation > Make Brush Spring >
.
The Make
Brush Spring Options window opens.
To see the effect of
the spring, move to a frame after the Start Frame (at least
two frames after) and transform the object. For example, if the Start Frame is
set to 2, move to frame 5.
- Switch to the scene view, if you are
not already in it, and keyframe the movement of the surface. For
details, see the Animation guide.
- Click the Play Forward button
to check that the tubes are behaving the way you want them to.
- Render the animation. See
Render a scene with Paint Effects strokes.
To edit spring
settings
- Select the stroke.
- Select
Paint Effects > Brush Animation > Make Brush Spring > .
The Make
Brush Spring Options window opens.
- Modify the settings and click Create. Paint
Effects replaces the existing expression with a new one
using the modified settings.
To
remove spring behavior from a stroke
- Select the stroke.
- Open the Expression editor (
Window > Animation Editors
> Expression Editor).
- Apply the Expression Name filter
(Select Filter > By Expression Name).
- Under Expressions,
select the expression for the stroke.
- Click the Delete button.
To
bake the spring animation
- Select
Paint Effects > Brush Animation > Bake Spring Animation > . The Bake
Brush Spring Animations window opens.
- In the Start Frame box,
enter the first frame to bake in the animation.
- In the End Frame box,
enter the last frame to bake in the animation.
- Click Bake. Paint
Effects bakes the expression for each frame in the specified
range so the spring behavior will render properly.
