Hello All,
I have been trying to write a small utility that takes an FK chain and rotates its childen so the FK chain pose matches the pose of an IK chain in the scene.
But unfortunatly the results I get are wrong, I know very little about the way maxscript works with rotations. And I suspect it is a very complex area?
I would be very greatful if somebody could give me some pointers on how I should be
[font=Verdana]approaching [/font]this task.
I have attached a test scene and a few lines of script to demonstrate what I have so far.
Many Thanks
Dan
Hi.
I’m not an expert in rigging and things like that but I think you could use something like this:
fn copyMat srcMat &dstMat matchPosition = (
local dstPos = if matchPosition then srcMat.row4 else dstMat.row4
dstMat = matrix3 srcMat.row1 srcMat.row2 srcMat.row3 dstPos
)
fn matchHierarchy srcRoot dstRoot = (
copyMat srcRoot.transform &(dstRoot.transform) false
local nBone = 1
for b in dstRoot.children do (
matchHierarchy srcRoot.children[nBone] b
nBone += 1
)
)
matchHierarchy $IKsys_Bicep $FK_Bicep
If you execute this script with your scene opened in MAX, the FK_* hierarchy should take the orientation (and scale) of the IKsys_* hierarchy. If you want your hierarchy to also take the position of the source hierarchy, you should change the line:
copyMat srcRoot.transform &(dstRoot.transform) false
to:
copyMat srcRoot.transform &(dstRoot.transform) true
HalfVector.
That works really well, many thanks for that, the function works perfect. Though how it actualy works goes way over my head!!
I only have one question, I am intending to use your function in animate mode, and at the moment the FK chain children get keys on rotation,position and scale. How would I edit it so to only sets keys for rotation.
Thanks again for your help
much appreciated
Dan