【文章內(nèi)容簡(jiǎn)介】 east 2 cameras then its position in 3d space can be determined Mocap Overview MOTION PLANNING IN REAL AND VIRTUAL ENVIRONMENTS FALL 2022 retargeting: the character ? the character is controlled by skeleton ? to control the skeleton, need to specify joint rotations ? muscles? Mocap Overview MOTION PLANNING IN REAL AND VIRTUAL ENVIRONMENTS FALL 2022 retargeting ? capture motion on performer 187。 positions of markers are recorded ? retarget motion on a virtual character 187。 motion is usually applied to a skeleton 187。 a skeleton is hierarchical ? linked joints 187。 need rotation data! ? need to convert positions to rotations Mocap Overview MOTION PLANNING IN REAL AND VIRTUAL ENVIRONMENTS FALL 2022 performer→ actor → character ? the actor is used to convert marker positions to rotational data 187。 markers are handles on the actor 187。 actor should have similar proportions as the performer ? joint rotations of the actor are applied to the character ? there are still issues with proportions Alias Motionbuilder: actor and markers Mocap Overview MOTION PLANNING IN REAL AND VIRTUAL ENVIRONMENTS FALL 2022 retargeting problems Mocap Overview MOTION PLANNING IN REAL AND VIRTUAL ENVIRONMENTS FALL 2022 retargeting problems Mocap Overview MOTION PLANNING IN REAL AND VIRTUAL ENVIRONMENTS FALL 2022 Applications ? Entertainment ? Medicine ? Arts / Education ? Science / Engineering Mocap Overview MOTION PLANNING IN REAL AND VIRTUAL ENVIRONMENTS FALL 2022 Entertainment: Live Action Films ? Computer generated characters in live action films (. Battle Droids and many others in Star Wars Prequels, Gullum in The Lord of the Rings, King Kong in King Kong , Davy Jones in Pirates of Caribbean) Mocap Overview MOTION PLANNING IN REAL AND VIRTUAL ENVIRONMENTS FALL 2022 Entertainment: 3D puter animations ? Characters in puter animated files (. Polar Express, Monster House) Mocap Overview MOTION PLANNING IN REAL AND VIRTUAL ENVIRONMENTS FALL 2022 Entertainment: Video Games ? Video games by Electronic Arts, Gremlin, id, RARE, Square, Konami, Namco, and others, (. Enemy Territory, Devil May Cry) Mocap Overview MOTION PLANNING IN REAL AND VIRTUAL ENVIRONMENTS FALL 2022 Medicine ? Medicine (., gait analysis, rehabilitation) ? Sports medicine (. injury prevention, performance analyses, performance enhancement) Gait Analysis Service Mocap Overview MOTION PLANNING IN REAL AND VIRTUAL ENVIRONMENTS FALL 2022 Arts / Education ? Dance and theatrical performances ? Archiving (., Marcel Marceau) OSU/ACCAD Mocap Overview MOTION PLANNING IN REAL AND VIRTUAL ENVIRONMENTS FALL 2022 Science / Engineering ? Computer Science (., human motion database, indexing, recognitions) ? Engineering (., Biped robot developments) ? Ergonomic product design ? Military (., field exercises, virtual instructors, and roleplaying games) Mocap Overview MOTION PLANNING IN REAL AND VIRTUAL ENVIRONMENTS FALL 2022 Aspects of the Problem ? “Gross” Body movement NOT: 187。 Appearance Models 187。 Facial animation 187。 Cloth, clothing, secondary movement 187。 Hands ? How to describe moving target – “Character” ? How to describe movement mathematically Motion Representation MOTION PLANNING IN REAL AND VIRTUAL ENVIRONMENTS FALL 2022 Human Model ? Humans are plex! Motion Representation Human motion can be understood at a very fine level of detail! MOTION PLANNING IN REAL AND VIRTUAL ENVIRONMENTS FALL 2022 Abstractions Representation of plex human structure with varying degrees of simplification 206 bones, muscles, fat, ans, clothing, … Motion Representation 206 bones, plex joints 53 bones Kinematic joints MOTION PLANNING IN REAL AND VIRTUAL ENVIRONMENTS FALL 2022 Standard simplified models of humans ? Small numbers of degrees of freedom for gross motion ? Articulated