How do I force DPlot to create a triangular mesh of my 3D points that is not convex?
The short answer is… you can’t, at least not initially. DPlot is only reading X,Y,Z values from your input source, whether that source is a file, the Windows Clipboard, communication from another program, or the Edit Data command. This is not enough information to determine where the edges of the surface should be, or for that matter to determine whether your surface should have any interior holes. DPlot always creates a convex triangular mesh from X,Y,Z input, which for many applications is exactly what you want. It is of course possible that you will not want a convex mesh. In this case DPlot will have created triangles outside the desired limits of your plot. The solution is to use the Define Boundary menu command to describe the exterior boundary of your surface. See the description of the Define Boundary command for more information.