How a frame follows a curve. frenet lies in the plane the curve bends in, its direction along the
tangent, and has no normal where the curve runs straight. perpendicular stands across the curve,
level with an up vector. rotationMinimizing stands across the curve and is carried along it from
the start without twisting, the way a swept profile rides.
How a frame follows a curve. frenet lies in the plane the curve bends in, its direction along the tangent, and has no normal where the curve runs straight. perpendicular stands across the curve, level with an up vector. rotationMinimizing stands across the curve and is carried along it from the start without twisting, the way a swept profile rides.