6: Secondary Action, Squash, Stretch

  • Homework crits.

  • Q&A on ASK reading to 212.

  • Secondary Action:  

"This action adds to and enriches the main action and adds more dimension to the character animation, supplementing and/or re-enforcing the main action. Example: A character is angrily walking toward another character. The walk is forceful, aggressive, and forward leaning. The leg action is just short of a stomping walk. The secondary action is a few strong gestures of the arms working with the walk. Also, the possibility of dialogue being delivered at the same time with tilts and turns of the head to accentuate the walk and dialogue, but not so much as to distract from the walk action. All of these actions should work together in support of one another. Think of the walk as the primary action and arm swings, head bounce and all other actions of the body as secondary or supporting action." -Frank Thomas and Ollie Johnston.  Hair, cloth, sometimes fingers.  It's the small details that add life to the scene.  They're not always noticeable but you "feel" them.

  • Squash & Stretch: 

"This action gives the illusion of weight and volume to a character as it moves. Also squash and stretch is useful in animating dialogue and doing facial expressions. How extreme the use of squash and stretch is, depends on what is required in animating the scene. Usually it's broader in a short style of picture and subtler in a feature. It is used in all forms of character animation from a bouncing ball to the body weight of a person walking. This is the most important element you will be required to master and will be used often." -Frank Thomas and Ollie Johnston.   Video by Digital Tutors "Understanding Squash and Stretch."

  • Planning: 

Carlose Baena's "Planning Case Study: The Incredibles.

  • Animation Demo: 

Walk Cycle Continued.

  • Inverse Kinematics vs Forward Kinematics. 

See this Spline Doctors post for more details.

  • Blending IK/FK: 

Prerequisite Hamish McKenzie's zooToolbox.mel, zooAlign.mel specifically.  Setup the pose in FK and snap the IK and Pole Vector controls to the FK controls and make the easy switch.


    • Thumbnail and Block a Baseball Pitcher (reference video at pitchingclips) 150-250 frames. When it comes to camera research sports photography. Deliver quicktime movie and thumbnails as a .jpg

    • Floating Pendulum Assignment (See this example) 150-250 frames. Deliver quicktime movie

    • Read to page 251 in ASK.