Lecture 7: Path Animation

To make a path animation:

Create cone and put a ramp color on it (use defaults)
Create an EP Curve with some points very close together and some points far apart
Select object(s) first then shift click the curve last
Animate -> Motions Paths -> Attach to Motion Path

Options:
    TimeRange:
    Time Slider - uses timeline start and end
    Start - creates a marker at start - have to add to it later using manipulators (see below)
    Start/End - enter the start and end times


Notice the markers on the curve at the start and end

Parametric Length - ON smooth motion over entire path
OFF - CV placement on curve will effect speed
Follow - effects rotation of object
     Front Axis - always in the direction it is going
     Up Axis - perpendicular to the curve

To see the object axis: Display -> Transform Display -> Local Rotation Axis

You can change some of the parameters in the Attribute Editor after the Motion Path has been set

World Up Type - use Vector (Normal will flip around when curve changes)

Inverse Up - will flip the object up or down

Inverse Front - swaps the object so it is facing backwards

(Only available in the attribute Editor)
Front, Up and Side Twist - will let you adjust the exact position of the object in relationship to the curve.

Bank - ON = leans into the center of the curve (only works with Follow )

Bank Scale - how much it banks; 2 = twice as much; -2 = leans away from curve

Bank Limit - limits the maximum amount of leaning


Animation along Path using Motion Path Manipulators

When making a path animation, in Options change Time Line to Start
     (it doesn't move anywhere)
In Channel Box click motionPath1

Click Show Manipulator Button

     handle in center = position along path
     circles = Twist Banking

1. go to the frame
2. move handle in center along path
3. channel box UValue - key selected
repeat the previous 3 steps

Can set banking with circles and Front, Up or Side Twist - key selected

Markers

Position Marker - automatically created - U parameter value

Orientation Markers - manually created (must have Follow selected) - amount of rotation for Twist

To reposition a marker:
Select marker
Click Move Tool
Drag to new location

Orientation Marker (use Follow)

Set key on up, side or front twist to get orientation Marker
Go to new frame
Click in channel box on one of the Twists and mid mouse drag in the main window to change orientation
Key selected in channel box

Can select Marker and rotate it to orient it better

To change Time

select Marker - > Attribute Editor - U Value
change the value and key it

Set Motion Path Key
To make a new motion path animation by moving your object rather than making a curve:
Move object -> set motion path key (repeat)
Makes the path for you
You will need to go into the attribute editor and adjust the parameters

Flow Path

Deforms the object along the path

Make curve and object
Select object and then curve
Motion Paths -> Set Motion Path Options
with the object selected, Motion Paths -> Flow Path Object Options
(Puts a lattice around the object to change the shape)


Flow Path Object Options

Divisions - you are defining the grids of the lattice
Lattice Around - object or curve
Lattice Effect (used with curve)
     ON - only local lattice points have effect
     OFF - all lattice points have effect - may cause drifting

If ON then set local Effect to # of lattice points that are around the object

To adjust the lattice, select the Components button on the top menu and move the points