Restricción Cinemática inversa¶
The Inverse Kinematics constraint makes not just one bone, but a whole chain of bones rotate to follow a target. A common example is automatically rotating the bones in a character’s arm to achieve a desired hand position. See Inverse Kinematics for details.
The constraint can be added quickly using the shortcut Shift-I. See Agregar CI a hueso.
Nota
La restricción de Cinemática inversa es especial, en el sentido de que modifica a varios huesos, más allá de ser aplicada a un hueso en particular. Por esta razón, ignorará su posición en la pila de restricciones y será ejecutada luego de todas las demás restricciones de los huesos afectados. Para lograr aplicar restricciones, luego del efecto de cinemática inversa, será necesario copiar primero la transformación final a una nueva cadena de huesos, (normalmente usando restricciones Copiar transformaciones.
Opciones¶
La restricción Cinemática inversa.¶
- Objetivo
The object or bone which the IK chain should point towards.
Truco
Unlike other constraints which require a valid Target, the Inverse Kinematics constraint can work without one. In this case, the «chain tip» bone can be moved and rotated freely, and only its ancestors will be constrained.
- Objetivo polar
The object or bone that determines the roll of the IK chain. For example, when applying IK to a character’s arm and using the Target to determine the position of the hand, the Pole Target determines the rotation of the arm, or put differently, the position of the elbow.
- Iteraciones
Cantidad máxima de iteraciones de resolución.
- Longitud de cadena
The number of bones affected by the constraint, starting with the owner bone and walking up its chain of ancestors. A value of 1 will only rotate the bone itself, a value of 2 will rotate the bone and its parent, and so on.
A value of 0 will include all of the bone’s ancestors (up to the root).
- Usar cola
Use the bone’s tail as the end of the chain. Unchecking this will use the bone’s head instead.
- Estirar
Whether bones are allowed to scale up or down in order to reach the Target. This only applies to bones with an Estiramiento de CI value that’s greater than 0.
- Influencia Posición
The checkbox determines whether the end of the chain should (try to) match the position of the Target.
The slider determines how strongly this chain affects its bones, compared to other IK chains that affect those same bones. This kind of structure is called a «tree», likening the chain tip bones to branches and their shared parents to a trunk. If a branch bone has a Weight of 1, it will «pull» on the trunk twice as hard as a branch with a Weight of 0.5.
- Rotación
The checkbox determines whether the end of the chain should match the rotation of the Target.
The slider determines how strongly this chain affects its bones, compared to other IK chains that affect those same bones.
- Influencia
How strongly the constraint affects the bone.
Método iTaSC¶
En caso de que el esqueleto estuviera configurado para usar el método de resolución iTaSC, la interfaz de la restricción mostrará los siguientes parámetros adicionales:
- Tipo de CI
- Copiar pose:
Just as with the Standard IK solver, the chain tip matches the location and/or rotation of the Target.
- Eje de referencia
The meaning of the axes in the Lock settings below.
- Hueso:
The chain tip should be positioned (or rotated) so that the Target has an X/Y/Z coordinate (or angle) of 0 in the space of the bone.
- Destino:
The chain tip should be positioned (or rotated) so that it has an X/Y/Z coordinate (or angle) of 0 in the space of the Target.
- Bloquear Posición/Rotación X/Y/Z
Whether the chain tip is constrained to match the Target along each axis.
Nota
Despite their name, these settings do not lock the bones to a fixed pose. For that, see the Bloquear settings in the bones” Inverse Kinematics properties.
- : Distancia:
The end of the chain stays inside, on the surface of, or outside a sphere centered on the Target.
- Modo de limitación
- Interior:
The chain tip stays close to the target.
- Exterior:
The chain tip stays away from the target.
- En la superficie:
The chain tip stays at an exact distance from the target.
- Distancia
The distance to maintain.