Hello. I do confirm that this particular functionality is broken since SI:2014 and that it worked in SI:2013. The issue seems specific with closed curves and happens with path and param types of curve constraints.
I have logged the issue as a regression so it can get immediate attention here: SPR-14215 Tangency on Path constraint (path and param) broken for closed curves It’s possible this issue may have developed when resolving this fixed one: SOFT-8622 Evaluation of fcurve tangents yield incorrect results in long curve cases. Thanks. Manny Papamanos Product Support Specialist Americas Frontline Technical Support From: [email protected] [mailto:[email protected]] On Behalf Of Thomas Volkmann Sent: Monday, May 26, 2014 11:34 AM To: [email protected] Subject: Re: BUG!?: Path-constrain tangency on closed curves Let's hope so! This feature is basic enough to be high on the priority list.... Eric Turman <[email protected]<mailto:[email protected]>> hat am 26. Mai 2014 um 17:18 geschrieben: Correct. I reported the bug at the end of the beta for 2015, it works fine in 2013 but breaks after 2014. I hope that this regression bug is a low hanging fruit that they can get to soon. On Mon, May 26, 2014 at 10:10 AM, Thomas Volkmann <[email protected]<mailto:[email protected]>> wrote: Hi, we just opened up an old scene and found that some objects were moving strange on their curves. It seems some bug was introduced to the path-constrain operator when using closed curves and tangency. Tangency is doing something wrong. A little python-script to reproduce: Application.NewScene("", "") Application.SICreateCurve("crvlist", 3, 0) Application.SIAddPointOnCurveAtEnd("crvlist", -4.12493302610738, 0, -1.5985306969839, False, 0, "") Application.SIAddPointOnCurveAtEnd("crvlist", -1.94612224821476, 0, -2.72067807367415, False, 0, "") Application.SIAddPointOnCurveAtEnd("crvlist", 2.89802986962416, 0, -3.2076476899737, False, 0, "") Application.SIAddPointOnCurveAtEnd("crvlist", 6.282590301302, 0, 1.95846476120408, False, 0, "") Application.SIAddPointOnCurveAtEnd("crvlist", 0.973061124107382, 0, 4.54152098679297, False, 0, "") Application.SIAddPointOnCurveAtEnd("crvlist", -2.87687636692617, 0, 3.71578989828504, False, 0, "") Application.SIAddPointOnCurveAtEnd("crvlist", -5.01338013942281, 0, 1.09038848867011, False, 0, "") Application.ApplyTopoOp("CrvOpenClose", "crvlist", 3, "siPersistentOperation", "") Application.ActivateObjectSelTool("") Application.ActivateObjectSelTool("") Application.GetPrim("Null", "", "", "") Application.ApplyCns("Path", "null", "crvlist", "") Application.SetValue("null.kine.pathcns.perc", 3.646, "") # on linux the objects rotation will be nan when this is 0 and tangency gets activated Application.SetValue("null.kine.pathcns.tangent", True, "") Application.SetValue("null.kine.pathcns.dirx", 0, "") Application.SetValue("null.kine.pathcns.diry", 0, "") Application.SetValue("null.kine.pathcns.dirz", 1, "") Application.SetValue("null.kine.pathcns.upvct_active", True, "") When you now move the path age slider you will notice that the null doesn't align to the curve like it should. Some observations: + was introduced either with 2014SP1 or SP2 (works in 2014 but not in SP2 or 2015, don't have SP1 available atm) + only closed handmade curves are affected (but not getPrimitve->curve->circle) + null rotation becomes 'nan' on linux when path-age is 0 and tangency is activated (no problem on windows) Please please fix it for for the absolute final Softimage version! cheers, Thomas -- -=T=-
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