Tuesday, April 29, 2008
Crowd simulation is the process of simulating the movement of a large number of objects or characters, now often appearing in 3D computer graphics for film.
The need for crowd simulation arises when a scene calls for more characters than can be practically animated using conventional systems, such as skeletons/bones.
Animators typically create a library of motions, either for the entire character or for individual body parts. To simplify processing, these animations are sometimes baked as morphs. Alternatively, the motions can be generated procedurally - i.e. choreographed automatically by software.
The actual movement and interactions of the crowd is typically done in one of two ways:
The most notable examples of AI simulation can be seen in New Line Cinema's The Lord of the Rings films, where AI armies of many thousands battle each other. The crowd simulation was done using Weta Digital's Massive software.
Crowd simulation can also refer to simulations based on group dynamics and crowd psychology, often in public safety planning. In this case, the focus is just the behavior of the crowd, and not the visual realism of the simulation.
Particle Motion: The characters are attached to point particles, which are then animated by simulating wind, gravity, attractions, and collisions. The particle method is usually inexpensive to implement, and can be done in most 3D software packages. However, the method is not very realistic because it is difficult to direct individual entities when necessary, and because motion is generally limited to a flat surface.
Crowd AI: The entities - also called agents - are given artificial intelligence, which guides the entities based on one or more functions, such as sight, hearing, basic emotion, energy level, aggressiveness level, etc.. The entities are given goals and then interact with each other as members of a real crowd would. They are often programmed to respond to changes in environment, enabling them to climb hills, jump over holes, scale ladders, etc. This system is much more realistic than particle motion, but is very expensive to program and implement.
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Animators typically create a library of motions, either for the entire character or for individual body parts. To simplify processing, these animations are sometimes baked as morphs. Alternatively, the motions can be generated procedurally - i.e. choreographed automatically by software.
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Strictly speaking, all Spetsnaz units operated by the KGB/FSB were called OSNAZ, an acronym for [voiska] osobogo naznacheniya or "special purpose [detachments]". These units originally were raised for internal use against right-wing counter-revolutionaries, dissidents, and other undesirables. There has always been a certain amount of shifting of personnel and units between both the GRU who control SPETSNAZ and the MVD with OSNAZ MVD and OSNAZ KGB or FSB, especially between the latter two. Today, OSNAZ is a term mainly used in connection with GRU-controlled COMINT, ELINT and radio-surveillance units within the Armed Forces.
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Spetsnaz can refer to any elite or special purpose units controlled by the Federal Security Service (FSB) with counter-terrorist and anti-sabotage tasks, Ministry of Interior (police) MVD, and the army special forces controlled by the military intelligence service GRU. Nowadays, the term is used as well to describe any special purpose units or task forces of other ministries (even the Emergency Situations Ministry special rescue unit).
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Strictly speaking, all Spetsnaz units operated by the KGB/FSB were called OSNAZ, an acronym for [voiska] osobogo naznacheniya or "special purpose [detachments]". These units originally were raised for internal use against right-wing counter-revolutionaries, dissidents, and other undesirables. There has always been a certain amount of shifting of personnel and units between both the GRU who control SPETSNAZ and the MVD with OSNAZ MVD and OSNAZ KGB or FSB, especially between the latter two. Today, OSNAZ is a term mainly used in connection with GRU-controlled COMINT, ELINT and radio-surveillance units within the Armed Forces.
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Animators typically create a library of motions, either for the entire character or for individual body parts. To simplify processing, these animations are sometimes baked as morphs. Alternatively, the motions can be generated procedurally - i.e. choreographed automatically by software.
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Animators typically create a library of motions, either for the entire character or for individual body parts. To simplify processing, these animations are sometimes baked as morphs. Alternatively, the motions can be generated procedurally - i.e. choreographed automatically by software.
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Animators typically create a library of motions, either for the entire character or for individual body parts. To simplify processing, these animations are sometimes baked as morphs. Alternatively, the motions can be generated procedurally - i.e. choreographed automatically by software.
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nimators typically create a library of motions, either for the entire character or for individual body parts. To simplify processing, these animations are sometimes baked as morphs. Alternatively, the motions can be generated procedurally - i.e. choreographed automatically by software.
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Animators typically create a library of motions, either for the entire character or for individual body parts. To simplify processing, these animations are sometimes baked as morphs. Alternatively, the motions can be generated procedurally - i.e. choreographed automatically by software.
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Strictly speaking, all Spetsnaz units operated by the KGB/FSB were called OSNAZ, an acronym for [voiska] osobogo naznacheniya or "special purpose [detachments]". These units originally were raised for internal use against right-wing counter-revolutionaries, dissidents, and other undesirables. There has always been a certain amount of shifting of personnel and units between both the GRU who control SPETSNAZ and the MVD with OSNAZ MVD and OSNAZ KGB or FSB, especially between the latter two. Today, OSNAZ is a term mainly used in connection with GRU-controlled COMINT, ELINT and radio-surveillance units within the Armed Forces.
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Animators typically create a library of motions, either for the entire character or for individual body parts. To simplify processing, these animations are sometimes baked as morphs. Alternatively, the motions can be generated procedurally - i.e. choreographed automatically by software.
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Animators typically create a library of motions, either for the entire character or for individual body parts. To simplify processing, these animations are sometimes baked as morphs. Alternatively, the motions can be generated procedurally - i.e. choreographed automatically by software.
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Animators typically create a library of motions, either for the entire character or for individual body parts. To simplify processing, these animations are sometimes baked as morphs. Alternatively, the motions can be generated procedurally - i.e. choreographed automatically by software.
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Strictly speaking, all Spetsnaz units operated by the KGB/FSB were called OSNAZ, an acronym for [voiska] osobogo naznacheniya or "special purpose [detachments]". These units originally were raised for internal use against right-wing counter-revolutionaries, dissidents, and other undesirables. There has always been a certain amount of shifting of personnel and units between both the GRU who control SPETSNAZ and the MVD with OSNAZ MVD and OSNAZ KGB or FSB, especially between the latter two. Today, OSNAZ is a term mainly used in connection with GRU-controlled COMINT, ELINT and radio-surveillance units within the Armed Forces.
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The need for crowd simulation arises when a scene calls for more characters than can be practically animated using conventional systems, such as skeletons/bones.mississauga condosunipart service centre in halifax
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There was a silence in which Ron fidgeted absentmindedly with a hole in his Chudley Cannons bedspread.
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Animators typically create a library of motions, either for the entire character or for individual body parts. To simplify processing, these animations are sometimes baked as morphs. Alternatively, the motions can be generated procedurally - i.e. choreographed automatically by software.
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