Wednesday, July 11, 2012

Animating Eyes

Ten Things to Think About - #9 Eyes:

10 Things to Think About - from the book Thinking Animation by Angie Jones and Jamie Oliff.
 
This is one of the lectures I use at the online school ianimate.net.  I created this list for my book Thinking Animation to help animators create a clear and solid message with their work.  I will post the 10 Things to Think About over the course of the next 10 weeks.  ~Enjoy!




#9 Eyes: (This particular lecture is much longer when I teach.  This is just scratching the surface regarding eye animation.)

Basic Notes on animating Eyes:
  • Eyes are windows into the soul and the soul is controlled by the mind.
  • Eye darts and glances tell more than any other gestures in the body when used in the right place in the scene.
  • Desire is always described in the eyes, even when hidden through subtext acting choices. 
Overview of Eye Movement:
  • Never animate without a reason! 
  • Force vs. Form
  • Look for patterns in the eye darts = Social Triangle – Right Eye, Left Eye and then mouth.

    ...eye shape:  when the iris moves around the eye the lid cuts across it changing its shape from round to oval.
    ...lid shape:  The lid itself changes shape as the eye line changes and the brow pushes down on it with emotional poses.  The lid also changes shape as it tracks with the eye line.  Even if you have a soft eye resolver attached to the lids, I still animate the lids as blinks and eye darts happen.
    ...darts:  Darts tell us the character is thinking, confused or trying to understand something.  It can also tell us if they are nervous, shy, present, angry and many other emotions depending on the timing.
    ...pupils:  Dilated and un-dilated pupils tell us more… Dilated shows interest, love, warmth.  Un-dilated eyes show fear, intensity or a bright light being show at the eye.
    ...blinks:  Never blink unless there is a reason!  Why do we blink? Dry Eye? Cut to next scene in our mind? Emotional Cues - Shy or nervous vs. Angry or High
    ...brows:  Brows shapes are reinforced in the lids.  They all move together to create the eye animation. Usually the break in the eyebrow relates to the highpoint of the eye. The eye is pulled by the eyebrow muscles.




    Watch the eye darts as Charlize Theron plays Aileen Wuornos in the movie Monster.  They describe her insecurity, her uneasiness and fear that someone might overhear her conversation, not mention the fact she is lying.

    Eye Darts:
    • No more than 1-2 frames then hold it to register what char is looking at.  If there is any ease, it happens at the end of the dart.
    • Linear Curves, I only put eases on slower eye motion. I tend to sculpt motion with tangents.  If you prefer to set a lot of keys to create your motion, then I would advise putting eases into your eye darts with your keys.
    • Dart then stay -and dart then stay, if you do not stay in one place the eye dart will never read.  You can use two eye darts to move the eye a far way, so it still reads as an eye dart.  Otherwise it’s just a look.

    • Triangle Motion: left eye, right eye, mouth.  This is the basic motion most eye darts take when conversing.  Even when the other person is not speaking we tend to look back and forth in this triangular motion to read the other person’s face.
     The social triangle of eye darts.

    • Be careful with how far you tilt the yes on the social triangle for eye darts or it will move into an intimate gaze zone.  When people approach each other from a distance, they look quickly between the other person's face and lower body to first establish what the sex of the person is and then a second time to determine a level of interest in them. This gaze is across the eyes and below the chin to lower parts of the person's body. In close encounters, it's the triangular area between the eyes and the chest and for distant gazing it's from the eyes to the crotch or below.
     The intimate gaze zone for eye darts.
    • Also be careful to not raise the darts higher than the brow line.  Then, you are entering the power gaze zone. Provided your gaze doesn't drop below the level of their eyes, the pressure will stay on the person being gazed upon. Never use this in friendly or romantic encounters. It works well for intimidation.

     The power gaze zone for eye darts.

    • When to use eye darts?  Thought process… shows thinking.  Stress, Assessing.  Moving holds are when they read best.  When your character has stopped moving so much and you can read them.
    • Eye Darts and the head and neck.  Nothing in the body is ever still. Occasionally the head will make a slight movement after the eye darts one way or another.  Very slight though.  Have you ever ridden a motorcycle?  The bike will go where you are looking naturally, so do not look at the curb!  Same thing goes for your head and the eyes.




    Hugh Grant has signature blinking he uses for his 
    fumbling characters who always seem out of sorts.

    Blinks and Lids:
    • On most character designs the upper lid covers most of the eye and the lower lid, barely moves to reach.  The blink line is usually ¾ down on the eye, not in the middle. The closed position is actually an overshoot of the upper lid pushing on the lower lid.
    • Everything I just said above can be affected / changed by emotional cures, lid shapes and other triggers.
    • Lots of blinking shows insecurity, bumbling, nervous and confused.  A direct stare is connected to emotions like fight or love.  Check out the movie I uploaded to the social group on Michael Caine.  Fear = no blinking.
    • Length of blinks.  Get inside the head of your character… if they are sleepy the closed position would be longer than a “zoinks!” WTF kind of blink. Slow blinks can be triggered by sadness, boredom or sleepiness or drugged.  Half Blink and twitches again show uncertainty in what the character is seeing or hearing.
    • On average it takes more frames to open the eye than close it due to momentum.  Ease out to open, but less to no ease on a closed eye.
    • Offset shapes in eyes to create more natural motion and then the actual closed point should be on the same frame and then eases are offset again as they reopen.  I think the Pixar blink can feel sleepy.
    • Move the eye line on a blink when the eye direction changes, if you don’t it will look weird.
    • Double take usually involves all of the blinks = full, half and twitchy blinks.  Check out the double take example I uploaded to the social group.
    • Shape the lid to compliment the brow shapes… angles up and down create added emotion.  A blink that arcs down is more elegant looking.  A blink that arcs up usually works with a squint and is related to happy blinks.




    Squinting:
    • Squints tend to happen on “T’s”, “S’s” and “P’s
    • An antic like a squint before blinking can help slower blinks or create emotional cues of a change in emotion during the blink.




    Brows:
    Brows move down a little on a natural blink.  This is even more extreme for cartoony characters.  On a longer blink an eye crunch can happen.  This action happens before the lids pushing down on a blink and pulling up on the open.




    Pupils:
    • If you have an extreme close up, you can adjust pupil size too.  Dilate = pleasure.  If you are excited, your pupils can dilate up to four times. Conversely, if you are experiencing anger or another negative emotion, your pupils shrink in size.  Dilating pupils are also signal of courtship. Maybe this is the reason why romantic encounters succeed in dimly lit places, because pupils naturally dilate in such light conditions.

    Dilating Pupils...

    • Don’t occlude more than 50% of the pupil.  You will look interest and appeal in your poses.
    • If the lid covers the eye too much it looks sleepy or drugged.  A soft eye solution will have to be countered many times depending on the angle of the head and the camera.
    Eye Accessing Cues:


    To get an idea how your eyes move, consider the following questions. For each question, as you think of the answer, notice the direction(s) your eyes move (up down or to the side) or if your eyes do not seem to move notice if you have a sense that you are looking in a certain direction (even if only for a fraction of a second).
    • What is the color of your front door?
    • What will you look like in 15 years?
    • What does your favorite music sound like?
    • What would your voice sound like if you had marbles in your mouth?
    • When you talk to yourself, what type of voice do you use?
    • What does it feel like to be in a nice warm bath?
    Did you notice your eyes had a tendency to look up for the first two questions, to the side for the next two questions and down for the last two questions? In general, if you are making a picture in your mind your eyes will tend to go up to the left or the right, for sounds laterally to the left or right, and down to the left or right for feelings or when you talk to yourself.
    More specifically, if you are right-handed, you may have noticed the following (for people who are left handed, interchange left and right in the following text):
    Question 1 - eyes up and to your left. This is a question about something you have seen before and hence you remembered it -- visual remembered (VR).
    Question 2 - eyes up and to your right. This is a question about something that I assume you have not seen before and hence you constructed this picture - visual constructed (VC).
    Question 3 - eyes on the horizontal plane to your left. This is a question about something you have heard before - auditory remembered (AR).
    Question 4 - eyes on the horizontal plane to your right. This is a question about something you have not heard before - auditory constructed (AC).
    Question 5 - eyes down and to the left. This is a question about your self-talk - auditory digital (Ad).
    Question 6 - eyes down and to the right. This is a question about your feelings- kinesthetic (K).

    Note: The above eye patterns are how your eyes would move if you are right-handed. The following picture describes the eye patterns for a right-handed person as you look at them - please note this distinction. These patterns are fairly consistent across all races, with the possible exception of the Basques, who appear to have a number of exceptions to the rule. For many left-handed people, the chart is reversed i.e. mirror image.





    One last note on eyes...
    Remember: The shape of the eye changes, as the eye direction changes.  Not literally.  It's an illusion.  This is why traditional animation literally changes the eye shape.  To simulate the illusion the lid creates over the eye.