Stumbling Toward 'Awesomeness'

Under the Hood: The Inner Workings of Animation on Assassin’s Creed

Sylvain Bernard, Animation Director, Ubisoft

Animation:

• All animation was done in 3dsMax with Biped
  • ‘Our animators do not like MotionBuilder for creating animation’
  • Would have meant porting all their tools to MotionBuilder
• MotionBuilder was only used to clean mocap
• They decided to ignore foot sliding in order to concentrate on a better performance and gameplay experience
• They stressed the importance of Technical Animators
• Up to 15 animators worked on Assassin’s Creed
• 40% of all animation was hand keyed
• There is no procedural animation(not counting blending)
• They showed the entire move tree
  • sprint, run, walk, jog, slow walk, banking, strafe, 4 idles
  • 168 ground animations for altair locomotion group
  • 122 anims in climbing group

Production:

• 90% of work was integrating animation into the environment
• The key was pairing animators with programmers
  • Sit them together
• Before they started one main goal of the project was ‘to do as much animation as we could’
  • They saw Next Gen as an animation showcase
• They prototype gameplay in max to show programmers how the game should look/feel
  • How AI should react
  • How a character should interact with the environment
• ‘In the beginning designers were given free reign to make anything they wanted, in the end we had to make a 20 page document telling them how to create levels’
  • Too much freedom leads to chaos
• Stressed the need to involve animators in animation system development

Pipeline/Rigging:

• All characters share the same skeleton (male/female npc, altair)
  • ‘the art director wanted characters of different heights, we said ‘no”
  • made mocking things up easy
• They call their movement locator the ‘magic bug’
  • Locators ‘joined together’ when two characters interacted
• NPCs use simple hinge constraints for ponytails and things
• They had ‘no working AI for almost the first two years‘ of the project
• They do edge detection on the collision mesh
• Auto nav mesh generation
• Auto ‘animation object’ placement