[Anark] IK Seeker (Physics Behavior)

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发表于 2011-10-21 09:38:00 |只看该作者 |倒序浏览

            IK Seeker (Physics Behavior)


         Summary


         Specifies the parent object as the end of an Inverse Kinematics chain which will seek an IK target.


            Category


            Latest Behaviors


            Author


            Gavin Kistner


            Difficulty


            (Reference)


            Time to Complete


            5 Minutes


         Downloads


         Click Here

         to download the associated files.


         (This document covers version 1.2.5 of the 'IK Seeker' behavior, current as of 2005-Feb-11)


         Description


         Attaching this behavior to an object specifies that parent as the ‘end’ of the IK chain of bones. When the

            Start Seeking

         action is called for this behavior (which occurs of the

            Start Immediately?

         property is checked), the bones will rotate and move (as set by the limit of each bone) to get the parent of this behavior as close as possible to the specified

            IK Target

         object.


         The parent of the parent of this object must have an

            IK Bone

         behavior attached to it, or this behavior will do nothing.


         Because of the brute-force nature of the

            IK

         Bone behavior, you should be sure to have this behavior on only when necessary. Once this behavior is started, each bone will be ‘run’ every frame, even if the parent of this behavior is exactly on top of the Target and no bones appear to be moving. Use the

            Stop Seeking

         action on this behavior to turn it off when not needed.


         See the sample presentation for an example of how to set up an IK chain.


         Basic Properties


            IK Target


            The target object that the IK chain should seek.


            Start Immediately?


            Start seeking the IK Target immediately, or wait for the 'Start Seeking' action to be called?


         Advanced Properties


            'Found' Distance


            Fire the 'Found Target' event when the parent gets closer than this value to the IK Target.


         Actions


            Start Seeking


            Start moving/rotating the IK Bones to move the parent towards the IK Target.


            Stop Seeking


            Stop chasing the IK Target.


         Events


            Found Target


            Fires when the parent object reaches the IK Target.


         Demonstration


            View Demonstration Project


            Download Project File