ComputationalCAD for AutoCAD can process the following input data:
§ Triangulation points are defined as arbitrarily spaced AutoCAD 3d point entities. All triangulation points will be vertices of the triangles in the CDT.
Figure 33: 54k triangulation points
§ Constraints are defined as an unordered set of non self-intersecting, non-overlapping AutoCAD 3d line entities. The CDT will insert additional points so that no constraint will cross an edge of a triangle. Thus, spatial constraints become part of the triangulated surface.
Figure 34: 35k contour lines (constraints)
§ Boundaries are defined as a set of closed, linear AutoCAD polyline entities. Boundary regions may overlap. Boundaries are not exactly part of the triangulation but will be projected on the triangulated surface after the triangulation process. The CDT will insert additional points so that no projected boundary will cross an edge of a triangle. Boundaries allow defining arbitrary shaped convex or concave holes, islands and outer bounds of the triangulated surface.
Figure 35: Two closed linear polylines forming two boundary regions