Geometric Accuracy Example(Cont’d)
Operations and algorithms are used to create solids resulting in vertices that may not lie exactly on edge curves and edge curves that may not lie exactly on surface intersections. The “actual” or “real” solid may have gaps, etc as in Figure 2.
Scenario: CAD-X creates the valid solid in Figure 2 using a tolerance of .003mm to determine if vertices are on edge curves. Topology structures would state A and B are start and end vertices of edge curve e1, B and C are start and end vertices of e2, etc. Edge curve e1 forms the boundary of F1 and F2, etc.