Here Struggling with paths - #5 by hofk I have a perfect motion along the curve. It used CurveModifier and so it works only for meshes.
Here Struggling with paths - #7 by hofk I tried to make it for a model. A few variants. But not the solution.
After that I tried to solve it with quaternions. I could not determine the appropriate formulas.
With matrices it gives simple formulas. With tangent, normal, binormal and Matrix3 and Matrix4
M3.set( ); M4.setFromMatrix3( M3 ); object.setRotationFromMatrix( M4 ); object.position.set( )
The curve is taken into account exactly, but there is a running reflection and consequently a flickering. See MovementOnCurve
What am I doing wrong here?