Parametric Lines / Points

Parametric lines are used for defining boundaries, which are created at their intersection points or directly at parametric points to define the areas of the cross section.

Therefore, parametric lines need to be arranged in such a way, that the border(s) (outer/inner) of the whole cross-section can be described by boundary lines created between their intersection points.

If certain parametric lines are defined as variable, it is important to take care of the dependencies between the parametric lines when generating them. Thus, there is a certain hierarchy in the dependencies, which determines the behavior of the geometry of the cross section when a line is moved. Depending on the definition of a line its position remains unchanged or changes according to its dependency of the variable line. If a cross section contains no variable lines, the dependencies of the lines among each other have no influence.

There are various tools for drawing parametric lines: Parallel to a line, through two intersection points and by angles. Further, there is the possibility for generating parametric points directly.

Hint: Use the button Show par. lines at the top right edge of the view window to show or hide the parametric lines.