The cove.tool grasshopper plugin uses a property-tag front-face/back-face of each plane to determine the cardinal orientation of each surface. Then select the remainder of the trace outlines and then type command "trim" and click the area at the center of the outlines to trim the surface and create surface openings. Select only the most outer profile line of the object then type command "Patch" to convert it to a single-surface object. window punches, then the command "Silhouette" will have to generate multiple closed curves. Delete the bad object and lines, and you should now have a compatible single-surface object. Convert the closed curve into a single surface with command "Patch." A window will pop up, in Surface U spans, and V spans change the "10" value to a "1", then click ok. Trace the bad object with command "Silhouette." While the traced curves are highlighted, type command "join" to join all curves, which will convert them to closed-curves. One recommended method to remake a bad object is listed below. The solution is to rebuild these objects. Select Bad Objects (SelBadObjects) - Bad objects are objects in Rhino that were brought over from a different platform and are struggling to display correctly and thus will not be able to export accurately with the Grasshopper Plugin. Select Duplicates (SelDup) - This command will find all identical objects which occupy the same 3D Space as an existing object. Click enter twice to eliminate all purge-uncovered objects. Purge (_Purge) - "Purge" command will search the entire Rhino File for unused and problematic model elements. By placing your geometry here, it will ensure your building will accurately display once inside cove.tool. Next, make sure your model is located near the Rhino origin axis (coordinates: 0,0,0). You may prefer to work on a copy of the primary model, but it is not necessary. Make sure all your building geometry is un-hidden and unlocked by typing "Unhide" and "Unlock" in the command bar. Unhide, Unlock, and Locate your Rhino project near the Origin Point
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All geometry should be above the XY plane, and only geometry above ground should be exported.ฤก. Ensure all surfaces are facing the correct direction with the front-face facing outward or upward. Delete all bad objects and purge unused file elements. Only geometry on cove.tool layers will be referenced. Make sure your final stage model is only single surface objects that are not locked, grouped, a block, or in any other way connected to solid or combined with other geometry. Make the export process as fast and freeze-free as possible with these Rhino model preparation steps.