For this purpose first it is necessary to define up, down, left, and right on the surface. Then a point is placed ... but front and back must also be defined ... some very small distance in front of the surface (or behind it, if you want). A point is in front of or behind a point on the surface, so we begin by inspecting the surface for defining points. Choosing one, we place our point in front of the surface and in front of that point on the surface. We can call it P1.
What is this? The drawing on a surface algorithm. P1.thesurfaceitsinfrontof = "surfacename". P1.thepointitsinfrontofonthesurfaceitsinfrontof = "pointname". P1.moveacrossthesurfaceitsinfrontof("up 1 inch","right 1 inch"). Surface.name = "inkstroke1". ... P2 ... P3. GetSurface("inkstroke1").p1 = P1. ... P2 ... P3.
