Shapes (spline curves)
Cubic spline curves, that are determined by constraints for the function values and tangents, are calculated. The shape of internal tendons can be calculated dependent on construction lines and spline curves.
Note: Each cross section is positioned by its usage at a segment point in the 3D-space. The specified constraints are used relatively to this postion. Especially,the used tangent values has to be taken into account due to this fact.
Each curve interval will be sub-divided into 20 parts during the calculation. Based on the spline curve, a table of linear parts will be created.