class notes |
| Lecture 6: Ball Bounce - Timing and Trajectory Charts
Timing gives meaning to motion
Timing tells us the weight of an object, it will help convey a character's thoughts, and emotions, and it can set the mood.
Movement is not important, it is how this movement expresses the cause of the motion.
When thinking about timing you need to:
reserve enough to time to prepare the audience for something to happen
devote time to the action
devote time to the reaction that happens in response to the action
If too MUCH time is spent on any of the above things, the audience's mind will wander
If too LITTLE time is spent, the audience will not get the meaning (or miss the whole thing)
Timing is based on nature.
Newton's laws of motion:
I. Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
III. For every action there is an equal and opposite reaction.
The force could be:
Natural force (external) such as wind, gravity, friction
an Internal force such as freewill, intention, instinct, mood (the character initiates the action)
There are two different types of timing:
timing for inanimate objects
timing for living characters
Timing for inanimate objects is based on nature and the physics of the real world.
Timing for living creatures is based on physics and mental operations (intention and emotion). Characters think then act.
Even cartoon motion is based on real motion and timing but it is exaggerated.
To move something, you need to understand the forces that are causing the movement
Things that effect timing:
weight / mass
the construction of an object
the flexibility of an object
the initial force
Things do not move suddenly. They typically accelerate to their maximum speed.
Things do not stop suddenly. Even if they hit a wall, they compress and bounce off a little before stopping.
Timing is based on cause and effect.
Ease in and ease out is really the relationship between velocity and forces.
Animating in Maya - Ghosting and Trails
Work with the graph editor and all 4 windows when you animate
To ghost an object
The Ghost Options window appears.
- Select the object or the root of the hierarchy that you want to ghost.
- Select Animate - Ghost Selected Options.
To set the number of ghosts that are drawn
- Set the ghosting options.
- Do one of the following:
- Click Ghost to apply the Ghost Options settings to the current object. The Ghost Options window closes.
- Click Apply to apply the Ghost Options settings to the current object, overriding any other ghosting settings on the object. The Ghost Options window remains open.
- Click Close to disregard any changes made to the ghosting options and close the Ghost Options window.
To change the color of ghosts
- Select Window - Settings/Preferences - Preferences and select the Animation category under Display.
- In the Ghosts section, set the ghosting preferences. See Animation (Display) preferences in the Preferences and Customization chapter of the Basics guide.
To unghost an object
- Select Window - Settings/Preferences > Color.
- Under the General tab, expand Ghosts.
- Select a color with the color sliders.
The Unghost Options window appears.
- Select the object.
- Select Animate - Unghost Selected
You have the option of unghosting only the selected object, or the selected object and all its children.
- Set the Unghost options.
To unghost all objects in your scene
To turn off the ghost display during object transform
- Select Animate > Unghost All.
- Select Window - Settings/Preferences - Preferences and select the Display category.
- In the Performance section, turn on Fast Interaction.
To create a Motion Trail
The Motion Trails Options window appears.
- Select the object and select Animate > Create Motion Trail > .
To snap objects to their Motion Trail positions
- Set the options.
- Do one of the following:
- Click Create Motion Trail to create a motion trail with the current settings for the selected object. The Motion Trail Options window closes.
- Click Apply to create a motion trail with the current settings for the selected object. The Motion Trail Option window remains open.
- Click Close to disregard any changes made to the motion trail options and close the Motion Trail Options window.
- Click Snap to Points in the animation toolbar.
Attracting Forces and Opposing Forces