Package org.robwork.sdurw

Class JointDeviceCPtr

  • public class JointDeviceCPtr
extends java.lang.Object
    Ptr stores a pointer and optionally takes ownership of the value.

    • Constructor Detail

      • JointDeviceCPtr

        public JointDeviceCPtr​(long cPtr,
                       boolean cMemoryOwn)

      • JointDeviceCPtr

        public JointDeviceCPtr()
        Default constructor yielding a NULL-pointer.

      • JointDeviceCPtr

        public JointDeviceCPtr​(JointDevice ptr)
        Do not take ownership of ptr.

        ptr can be null.

        The constructor is implicit on purpose.

    • Method Detail

      • delete

        public void delete()

      • deref

        public JointDevice deref()
        The pointer stored in the object.

      • __ref__

        public JointDevice __ref__()
        Dereferencing operator.

      • getDeref

        public JointDevice getDeref()
        Member access operator.

      • isShared

        public boolean isShared()
        check if this Ptr has shared ownership or none
        ownership
        Returns:
        true if Ptr has shared ownership, false if it has no ownership.

      • isNull

        public boolean isNull()
        checks if the pointer is null
        Returns:
        Returns true if the pointer is null

      • getJoints

        public JointPointerVector getJoints()
        Get all joints of this device
        Returns:
        all joints

      • setQ

        public void setQ​(Q q,
                 State state)

      • getQ

        public Q getQ​(State state)

      • getDOF

        public long getDOF()

      • getBounds

        public PairQ getBounds()

      • getVelocityLimits

        public Q getVelocityLimits()

      • getAccelerationLimits

        public Q getAccelerationLimits()

      • getName

        public java.lang.String getName()
        Returns the name of the device
        Returns:
        name of the device

      • baseTframe

        public Transform3Dd baseTframe​(Frame f,
                               State state)
        Calculates the homogeneous transform from base to a frame f
        \robabx{b}{f}{\mathbf{T}}
        Returns:
        the homogeneous transform \robabx{b}{f}{\mathbf{T}}

      • baseTend

        public Transform3Dd baseTend​(State state)
        Calculates the homogeneous transform from base to the end frame
        \robabx{base}{end}{\mathbf{T}}
        Returns:
        the homogeneous transform \robabx{base}{end}{\mathbf{T}}

      • worldTbase

        public Transform3Dd worldTbase​(State state)
        Calculates the homogeneous transform from world to base \robabx{w}{b}{\mathbf{T}}

        Returns:
        the homogeneous transform \robabx{w}{b}{\mathbf{T}}

      • baseJframe

        public Jacobian baseJframe​(Frame frame,
                           State state)
        Calculates the jacobian matrix of a frame f described in the
        robot base frame ^{base}_{frame}\mathbf{J}_{\mathbf{q}}(\mathbf{q})

        Parameters:
        frame - [in] Frame for which to calculate the Jacobian
        state - [in] State for which to calculate the Jacobian

        Returns:
        the 6*ndof jacobian matrix: {^{base}_{frame}}\mathbf{J}_{\mathbf{q}}(\mathbf{q})

        This method calculates the jacobian relating joint velocities ( \mathbf{\dot{q}} ) to the frame f velocity seen from base-frame
        ( \nu^{base}_{frame} )

        \nu^{base}_{frame} = {^{base}_{frame}}\mathbf{J}_\mathbf{q}(\mathbf{q})\mathbf{\dot{q}}


        The jacobian matrix {^{base}_n}\mathbf{J}_{\mathbf{q}}(\mathbf{q})
        is defined as:

        {^{base}_n}\mathbf{J}_{\mathbf{q}}(\mathbf{q}) = \frac{\partial ^{base}\mathbf{x}_n}{\partial \mathbf{q}}

        By default the method forwards to baseJframes().

      • baseJframes

        public Jacobian baseJframes​(FrameVector frames,
                            State state)
        The Jacobian for a sequence of frames.

        A Jacobian is computed for each of the frames and the Jacobians are
        stacked on top of eachother.
        Parameters:
        frames - [in] the frames to calculate the frames from
        state - [in] the state to calculate in
        Returns:
        the jacobian