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Spline points not working as expected!!!

Hi, I am constructing a circular path using spline but it is not working as expected, at some point the spline tangent Y axis gets rotated by 180 degree. I have attached the screenshot for the same. The blueprint used is a sample one, i have attached it for reference. Please tell me a solution for this.

Best regards Atinalt text

Product Version: UE 4.9
spline1.png (602.4 kB)
spline3.png (674.1 kB)
spline4.png (702.3 kB)
spline5.png (698.4 kB)
spline6.png (170.1 kB)
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asked Feb 14 '16 at 02:10 PM in Bug Reports

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avatar image Atin123 Feb 14 '16 at 03:56 PM

Hi the problem seems to be with spline mesh component function to set the position and tangent. it is reproducible when I try to make a circle in YZ or XZ plane.

avatar image Atin123 Feb 14 '16 at 08:18 PM

HI one work around to the problem is a very trickey one, but only will work if you are working on one plane. So solution is to rotate the actor such that spline point will lie in X-Y plane relatively. This is very tedious work around. Wish i get a proper solution

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Hi Atin123,

Are you trying to create a closed loop or a standard roller-coaster loop?

It should come down to playing with the SplineUpDirection setting to get the results you want. Could you include a screenshot of exactly what results you are getting?

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answered Feb 16 '16 at 08:36 PM

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avatar image TJ V ♦♦ STAFF Feb 23 '16 at 08:27 PM

We are marking this report as Resolved for tracking purposes. If you would like to continue investigating the issue, just post a comment to reopen the report.



avatar image Atin123 Feb 27 '16 at 02:39 AM

Hi i am doing open loop. I have attached 5 screenshot posting the issue. Please reproduce following the way i have done, u will the issue

Thanks Atin

avatar image TJ V ♦♦ STAFF Mar 02 '16 at 09:26 PM

Try setting the Spline Up Dir of the 'Add Spline Mesh Component' node like I have pictured below. I duplicated your setup and this fixed it for me.

alt text

splineupdir01.png (14.4 kB)
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