TYPE: CHOP
TITLE: InverseKin CHOP

This generator CHOP generates channels for bone objects based on a bone
chain and an end affector. It can solve for the bone angles using a
variety of different solver types.

There are no local variables.

Parameters
Kinematics
    Solver Type - Specifies the solver to use to generate the channels.
	None - No solver. Use the original parameter values.
	Show Rest Position - No solver. Uses the rest angles.
	Show Capture Position - No solver. Uses capture angles.
	Inverse Kinematics - Uses IK solver. The solution is
		uniquely defined by the end affector position. Constraint
		parameters are ignored.
	IK With Constraints - Uses a modified IK solver. The
		solution depends on the previous solution. Constraint
		parameters are used to limit the range of motion.
	Follow Curve - The bones are positioned to follow the
		specified curve as closely as possible.
    Root Bone  - This is the first bone in the chain for which this CHOP
		 should create solution channels.
    End Bone   - This is the last bone in the chain for which this CHOP
		 should create solution channels.
    End Affector - For Inverse Kinematics and IK With Constraints solvers,
		 this is the object to use as the end affector when
		 solving for the bone angles.
    Twist Affector - For the Inverse Kinematics solver, this specifies an
		 object that controls the twist orientation of the
		 solution bone angles.
    IK Twist   - For the Inverse Kinematics solver, this parameter	/iktwist
		 specifies an additional twist angle to be applied to
		 the solution bone angles.
    IK Dampening - For the Inverse Kinematics solver, this	/ikdampen
		 parameter represents how easily the End Bone can be pulled
		 off the End Affector as the bone chain is stretched out.
    Curve Object - For the Follow Curve solver, this parameter
		 specifies the object that contains the curve geometry
		 that the bone chain should follow.
    Curve Normals - For the Follow Curve solver, this parameter	
		 specifies how the curve normals should be transfered
		 to the bone chain. Note that the normals are interpolated
		 on the curve between the curve breakpoints. Because
		 breakpoints (and not control points) lie on the curve it
		 is more meaningful to use interpolate the breakpoint
		 rather than the control vertex values. Though, breakpoint 
		 normals  are calculated from the control vertices.
	Best Guess - the bone chain normals approximate the curve
		 normals as much as the curve parameters allow.
		 (Path parameters, for example, carry extra information
		 that allow twists of more than 360 degrees)
	No Normals - the bone chain maintains its own normals defined
		 by the rest position.
	Quaternion - the bone chain normals interpolate the curve 
		 normals using quaternion rotation of the vectors. (i.e.,
		 the bone chain normals lie on the shortest arc 
		 defined by two curve normals on a unit sphere.
	Clamped Angle - the bone chain normals are calculated
		 using twist angles around the curve (between the
		 curve points at which a normal is defined). The
		 angle difference is restricted to the interval
		 between -180 to 180 degrees.
	Angle	- the bone chain normals are calculated using twist 
		 angles. This option is similar to Clamped Angles, except the
		 twist angles around the curve are not restricted. Note,
		 that for this option, the curve must carry additional
		 information (see Object Path Tool). Otherwise, this option
		 is downgraded to Clamped Angle.
		 
    Blend	 - This option blends between the local bone rotation values
                   and the solved solution. When this value is 0 it produces
		   the local bone rotation values and when it is 1, it produces
		   the solved bone rotation values.
    Resist Straight Solutions	- This option turns on/off the feature of the
		 Inverse Kinematics solver to further correct stability
		 problems when the bone chain is straight.
    Tracking Threshold Factor	- This value specifies the acceptable accuracy
		 threshold for the Inverse Kinematics solver for the bone chain
		 to be in contact with the End Affector.

Channel
    Single Frame    - Only create one-sample channels, at the Start
		      position.
    Clean Rotations - When not in Single Frame mode, the CHOP can use
		      the previous rotation values as a hint when
		      generating the next frame's rotation values.
    Start           - The start position of the CHOP.       /start
    End             - The end position of the CHOP.         /end
    Sample Rate     - The sample rate of the CHOP.          /rate
    Extend Left     - The left extend condition (before
		      the CHOP's start).
    Extend Right    - The right extend condition (after
		      the CHOP's end).
    Default Value   - The value to use for the              /defval
		      "Default Value" extend condition type.

See also: Handle, Object, Transform
