I have this joint chain which work as a controller for another set of joint chain (with softbody spline IK). I setup each of these joints on this joint chain with both connection editor (direct connection) and expressions, so if I rotate the root joint in X axis and Y axis the antennae curls perfectly and drives the softbody spline atennae (sweet!!). however when I rotate it in the Z axis... 2 of the joints (both of which has expressions) refuse to rotate despite that in the channel window the rotation value registers.
Here's a pic:
Here's the expressions I use:
On joint4 rotate X: joint4_l.rotateX=joint3_l.rotateX*1.5
joint4 rotate Y: joint4_l.rotateY=joint3_l.rotateY*1.5
joint4 rotate Z: joint4_l.rotateZ=joint3_l.rotateZ*1.5
the same problem on joint8 (only that the expressions is on joint9)
The problem only occurs on Z axis, X and Y works fine. I check and rechecked my expressions and connection functions, I'm pretty sure I didn't mistype anything. The problem still occurs even after I delete the expressions on joint4_l.rotateZ. strangely It goes away if I delete all three expression functions (joint4_l.rotateX, Y, Z).