After implementing Cuploas and Extrusions, it became necessary to control hub generation on a per vertex basis. This is done via a context menu. Choose the Pick Element tool and click Pick Hubs on the Toolbar. Then hold down the ALT key and click on a Hub with the right-mouse button. The Hub context menu appears allowing you to modify the hub normal or turn OFF hub generation:
Regenerate the hub by clicking the Pick Vertex tool . Once again, down the ALT key and click on a Vertex with the right-mouse button. The Vertex context menu appears. Check the menu ‘Generate Hub’. The hub is regenerated.
IMPORTANT: Strut intersection is turned off at ungenerated hubs.
1. Hub generation around an extrusion: the hub normals default to '‘Auto’. Choose the Pick Element tool and click Pick Hubs on the Toolbar. Hold down the ALT key and right-click on a hub (e.g. the one circled yellow).
2. The Hub context menu appears. Uncheck ‘Generate Hub’.
3. The Hub mesh is deleted from the scene graph.
4. Repeat the process for all hubs around the extruded facets. Even though Strut Intersection is ON for the rest of the sphere, struts around the extruded facets are not affected.
Hubs on Extrusions
When ‘Project strut ends to Hub Intersection Plane’ is checked, and hubs lie on an extrusion, you must change all hubs on the extrusion to use the hub normal option ‘Use Facet Average Normal’. (Do this via the context menu previously mentioned). This will ensure that struts intersect correctly with the end disks of the hub cylinders. The screen shot below shows a ludicrous extrusion with multiple hubs set to use the ‘Facet Average Normal’ option. The struts have been deliberately extended in depth to show the intersections with the end disc planes.
A ludicrous extrusion showing the option ‘Project strut ends to Hub Intersection Plane’ with the context option ‘Use Facet Average Normal’.