Skeletal animation: Difference between revisions
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[[ | [[File:Breen skeleton ref.jpg|150px|right|Skeleton in reference posture]] | ||
[[ | [[File:Breen skeleton posed.jpg|150px|right|Skeleton during an animation]] | ||
''' | '''Skeletal animation''' is a processor-efficient and relatively simple animation system that can simulate any jointed object, from people to insects to machinery. | ||
The titular [[skeleton]] is a hierarchy of jointed but individually rigid [[bone]]s that are manipulated in the same way as a real skeleton. Vertices are '[[envelope]]d' to the appropriate bone and move with it; the bone in turn moves with the bones [[parentbone|above it]] (e.g. the hand follows the forearm). Polygons that cover joints between bones [[weightmap|stretch and compress]] as the skeleton moves. | |||
Bones can be controlled with [[$sequence|canned animation]], [[$collisionjoints|real-time physics]], and/or [[$ikchain|inverse kinematics]]. | |||
== Limitations == | |||
The | ; A bone is rigid | ||
: The vertices enveloped to any given bone move as one unit. A skeletal animation cannot move them relative to each other (a [[flex animation]] can). | |||
; A bone has only one parent | |||
: A skeletons are organised into trees, branching out from a root. Webs/meshes of bones are not possible. | |||
; Skeletons require hierarchy | |||
: While it is theoretically possible to animate gasses or liquids with bones, it's an inefficient and overwrought solution. Use [[:Category:Particle System|particles]] to create such effects. | |||
== See also == | == See also == | ||
* [[Flex animation]] morphs [[Vertex|vertices]] directly (used for faces/lips) | |||
* [[Vertex animation]] is keyframed vertex motion | |||
* [[Category:Particle System|Particles]] are used to animate clouds or streams of objects | |||
* [[List of material proxies#Texture manipulation|Animated textures]] change the appearance of 2D surfaces | |||
* <code>[[SetSequence()]]</code> is used by programmers to play skeletal animations | |||
== External links == | |||
* | * {{w|Skeletal animation}} on '''Wikipedia''' | ||
__NOEDITSECTION__ | __NOEDITSECTION__ | ||
[[Category:Glossary]] | [[Category:Glossary]] | ||
[[Category:Modeling]] | [[Category:Modeling]] | ||
Latest revision as of 04:13, 23 June 2024
Skeletal animation is a processor-efficient and relatively simple animation system that can simulate any jointed object, from people to insects to machinery.
The titular skeleton is a hierarchy of jointed but individually rigid bones that are manipulated in the same way as a real skeleton. Vertices are 'enveloped' to the appropriate bone and move with it; the bone in turn moves with the bones above it (e.g. the hand follows the forearm). Polygons that cover joints between bones stretch and compress as the skeleton moves.
Bones can be controlled with canned animation, real-time physics, and/or inverse kinematics.
Limitations
- A bone is rigid
- The vertices enveloped to any given bone move as one unit. A skeletal animation cannot move them relative to each other (a flex animation can).
- A bone has only one parent
- A skeletons are organised into trees, branching out from a root. Webs/meshes of bones are not possible.
- Skeletons require hierarchy
- While it is theoretically possible to animate gasses or liquids with bones, it's an inefficient and overwrought solution. Use particles to create such effects.
See also
- Flex animation morphs vertices directly (used for faces/lips)
- Vertex animation is keyframed vertex motion
- are used to animate clouds or streams of objects
- Animated textures change the appearance of 2D surfaces
SetSequence()is used by programmers to play skeletal animations
External links
Skeletal animation on Wikipedia