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Blender shading,

character animation

Instructor: Christopher Rasmussen (cer@cis.udel.edu)

May 10, 2022 ❖ Lecture 24

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Outline

HW #5 demos next Monday and Tuesday; sign-up page will be posted by final review on Friday
Blender shading demo
Brief intro to rigging and skinning for animation
SIGGRAPH videos

Bonus Topic: Animation

Bonus Topic: Animation

Definition: Moving an object or changing its shape over time
We know how to apply transformations to an entire object...but what about just its parts individually?

Bonus Topic: Animation

Definition: Moving an object or changing its shape over time
We know how to apply transformations to an entire object...but what about just its parts individually?
We didn't animate it, but changing some or all of a spline's control points would deform the underlying curve/mesh. However, it's difficult to scale to large parts of an object

Bonus Topic: Animation

Definition: Moving an object or changing its shape over time
We know how to apply transformations to an entire object...but what about just its parts individually?
We didn't animate it, but changing some or all of a spline's control points would deform the underlying curve/mesh. However, it's difficult to scale to large parts of an object
Rigging is a term for adding controllability and/or deformability to an otherwise rigid mesh, generally through a control skeleton

An armature (aka skeleton) is a set of bones and how they are connected, with motion constraints (e.g., angular, translational)
Chains and/or tree structure allow parent transforms to be transmitted to children

Single bone

Bonus Topic: Rigging in Blender

Bones in the armature can control object mesh vertices through a weighting scheme similar to the blending functions we used for splines