Designing transition areas with functions for reverse engineering of surfaces with sharp edges

My digitized mesh data have rounded areas between adjacent facets that I would like to design as sharp-edged in my reverse-engineered surfaces. Can I do this with Tebis functions for reverse engineering of surfaces?

Yes. As of Tebis Version 4.0 Release 1, it is possible to design sharp edges when reverse engineering surfaces.

Here's how you do it


First determine the theoretical edge and create a corresponding one. The theoretical edge is the edge at which both surfaces penetrate each other. Select function "BRep / Curve / Fillet." The "Parameters" dialog opens.


In parameter "Positions," select two points on the mesh from which the theoretical edge is to be derived. The "Fillet edge" dialog opens. A 2-axis symbol is displayed simultaneously.


Use the drag arrows to specify the direction of the theoretical edge.


Confirm your inputs. The edge is generated.


Now create the wire-frame model.


Create the individual surfaces with functions "BRep / Face / Approx" and "BRep / Surf / Approx."


In our example, we have already generated a trimmed surface with function "BRep / Face / Approx" and now we want to create a 4-edge surface that connects to the trimmed surface with a sharp edge using function "BRep / Surf Approx." To do this, select the facet that should connect with a sharp edge. Ensure that the transition to the adjacent surface is continuous. If necessary, adjust the transition mode in the selection list.


A loop radius is simultaneously placed around the theoretical edge and is shown in red. The surface to be generated is not referenced to the mesh within this radius. In parameter "G0 loop radius," enter the value within which the surface to be generated is not to be referenced to the mesh.


Confirm your inputs. The surface (blue) is generated.


Open the context-sensitive help in function "BRep / Curve / Fillet" to learn more about creating edges in rounded areas.

Open the context-sensitive help in function "BRep / Surf / Approx" to learn more about approximating 4-edge surfaces.

Open the context-sensitive help in function "BRep / Face / Approx" to learn more about approximating trimmed surfaces.


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