unity3d - Sorting array of points in clockwise order -

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is there such algorithm sort array of 3d points in clockwise order? i'm dealing right triangle in case 3 points. (for build mesh)

the algorithm sorting not difficult. problem is, plane points lie on. , side facing

only bunch of points cannot clockwise or counter clockwise itself. need plane , side reference point

edit : used said bit inaccurate. need position , direction reference, not plane


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