Ilia Posted July 25, 2021 Share Posted July 25, 2021 Hi, guys, I'm making a procedural modeling of a roller coaster. It looks very common, but I'm stuck in a problem. After I create a curve, I want to use the parallel transport method to get a smooth orientation, but I find that I do get smooth normal, tangent and bitangent, but I can't smooth them where the ends of the curve are connected. I mean, if I rotate and translate to the last point based on the normal of the first point, I will not get a smooth orientation where the last point meets the first point (I find that almost all the situations discussed in the tutorial are based on an unclosed curve, and I want to make a closed curve here, I wonder if there is a solution.) As shown in the figurerollerCoaster01.hip below, there is a smooth orientation in other parts of the curve, except where the curve is connected end to end. Quote Link to comment Share on other sites More sharing options...
Fenolis Posted July 26, 2021 Share Posted July 26, 2021 Out of curiosity, is there a specific reason to implement an advanced algorithm when you can use the Sweep SOP instead? Quote Link to comment Share on other sites More sharing options...
Ilia Posted July 26, 2021 Author Share Posted July 26, 2021 Yes, I do use sweep SOP. I just want to use the algorithm to get a smooth orientation. Quote Link to comment Share on other sites More sharing options...
eikonoklastes Posted July 26, 2021 Share Posted July 26, 2021 Is your curve closed? Try using an Orientation Along Curve SOP before the Sweep. If that doesn't work, can you post your curve here? Quote Link to comment Share on other sites More sharing options...
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