Your not alone, I'm currently doing some rigging and using constraints such as look-at and I'm stumbling across a whole bunch of update/override issues. CHOPs seem to be very sensitive to what flags you use, for example the look-at doesn't set the export flag, which is why I think you don't get updated values in the SRT. I also noticed different behaviour when I had the render flag of something switched on, which makes no sense to me.
I'm having a look to see if I can isolate the issues but things seem to change so much, and sometimes things do work. ________________________________ From: [email protected] <[email protected]> on behalf of Olivier Jeannel <[email protected]> Sent: 02 November 2017 07:29 To: [email protected]; [email protected] Subject: Re: H16 Constraint behavior The worst beeing if I middle clic on the object constrained, I can read some r(x,y,z) values that are the correct local rotation, I just don't know how to copy them back to the rx ry rz at object level :/ 2017-11-02 7:57 GMT+01:00 Olivier Jeannel <[email protected]<mailto:[email protected]>>: Hi there, I'm "discovering" the constraint behaviour in Houdini (never used it before whatever version). So, I'm using that new "LookAt" in the Constraint shelf and it builds that Chop constraint. Where I'm confused, is that while the geometry is aligned at SOP level (ie : faces prims are aligned), but in fact the Axis at Object level is not. I think this join this previous discussion (about parenting) https://urldefense.proofpoint.com/v2/url?u=http-3A__softimage.69864.x6.nabble.com_Houdini-2Dhierarchical-2Dorganization-2Dtd7448.html-23a7452&d=DwIFAw&c=76Q6Tcqc-t2x0ciWn7KFdCiqt6IQ7a_IF9uzNzd_2pA&r=GmX_32eCLYPFLJ529RohsPjjNVwo9P0jVMsrMw7PFsA&m=QqGVlLRsGI_HKEMoGs4vtUgxo6tCQjpbpRU2WDpcy1I&s=XYf-NYDCuroPwPDp0uuv63Xbr6o2yNy1DKjsS8Q3q5I&e=<https://urldefense.proofpoint.com/v2/url?u=http-3A__softimage.69864.x6.nabble.com_Houdini-2Dhierarchical-2Dorganization-2Dtd7448.html-23a7452&d=DwMFaQ&c=76Q6Tcqc-t2x0ciWn7KFdCiqt6IQ7a_IF9uzNzd_2pA&r=GmX_32eCLYPFLJ529RohsPjjNVwo9P0jVMsrMw7PFsA&m=jlhsxz482ZyhCmTLTzZ2scMyMLAxsqwMzhjGKGu240U&s=VduWt4Wco939KxbK-TcnNGGO9XSXr_bdwOCNCGaJXyE&e=> This is confusing because you can no more transform object in local space (viewport manipulation). Or, for example, Constraint Lookup a Spot Light, and all the gizmo get off. But maybe I missed something obvious.
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