*PerpAxesJointPair()
Creates a perpendicular axes joint pair.
Syntax
*PerpAxesJointPair(joint_name,"joint_label",body_1, body_2, origin, POINT|VECTOR, point_1|vector_1, POINT|VECTOR, point_2|vector_2)
Arguments
- joint_name
- The variable name of the perpendicular axes joint pair.
- joint_label
- The descriptive label of the perpendicular axes joint pair.
- body_1
- The first body or body pair constrained by the perpendicular axes joint pair.
- body_2
- The second body or body pair constrained by the perpendicular axes joint pair.
- origin
- The location of the perpendicular axes joint pair.
- POINT|VECTOR
- A keyword that indicates the alignment method.
- point_1|vector_1
- An entity variable referring to a Point, PointPair, Vector, or VectorPair which is based on the above keyword.
- POINT|VECTOR
- A keyword that indicates the alignment method.
- point_2|vector_2
- An entity variable referring to a Point, PointPair, Vector, or VectorPair which is based on the above keyword.
Example
*BodyPair(body_1, "First body", p_1)
*BodyPair(body_2, "Second body", p_2)
*VectorPair(vector_1, "First vector")
*VectorPair(vector_2, "Second vector")
*PointPair(p_origin, "origin")
*PerpAxesJointPair(jt1, "Orientation joint", body_1,
body_2,
p_origin,
VECTOR,
vector_1,
VECTOR,
vector_2)
Context
Properties
Property | Returns Data Type | Description |
---|---|---|
b1 | BodyPair | The first body pair constrained by the perpendicular axes joint pair. |
b2 | BodyPair | The second body pair constrained by the perpendicular axes joint pair. |
i | MarkerPair | The marker pair on b1. |
j | MarkerPair | The marker pair on b2. |
l | PerpAxesJoint | Left perpendicular axes joint. |
label | string | The descriptive label of the perpendicular axes joint pair. |
r | PerpAxesJoint | Right perpendicular axes joint. |
state | boolean | Control state (TRUE or FALSE). |
varname | string | The variable name of the perpendicular axes joint pair. |
Comments
The individual joints of a *PerpAxesJointPair() can be referred to as joint_name.l (left perpendicular axes joint) and joint_name.r (right perpendicular axes joint).
A perpendicular axes joint constrains the relative rotation between two bodies in such a way that the specified axes attached to the two bodies always remain mutually perpendicular.
When a point is used (instead of a vector) to define an axis, it is obtained as the direction from the origin of the joint to the specified point.