These curves will have sharp corners because we used straight cutting surfaces on the smooth scroll surface, and there will be many segments. Duplicate each one and connect them. This will give you two disconnected curves that have both straight and curved segments.
Next, join the front ends of both curves with a straight vertical line, and similarly join the rear ends of both curves with a straight horizontal line to get a 3-dimensional closed curve shown here in yellow. The curve lies directly on the L-shaped cutting surface.
Trim the copy of the cutting surface using the #edgeCurves we just created, and discard the outer portions. What you have left over is a #patchSurface that we join with the trimmed scroll surface from the previous step.
At this point you should have a single scroll surface, part of which is the patch surface. This scroll surface should have two #planarHoles — one in the front and the other in the rear.
Cap both planar holes to get a solid scroll object. Be sure to check the object for #nakedEdges and #nonmanifoldEdges to make sure that the object is airtight.
Splines From the trimmed scroll surface in https://pixelfed.social/p/Splines/795265013969852028, #duplicateEdges that fall on the red cutting surface.
Show moreThese curves will have sharp corners because we used straight cutting surfaces on the smooth scroll surface, and there will be many segments. Duplicate each one and connect them. This will give you two disconnected curves that have both straight and curved segments.
Next, join the front ends of both curves with a straight vertical line, and similarly join the rear ends of both curves with a straight horizontal line to get a 3-dimensional closed curve shown here in yellow. The curve lies directly on the L-shaped cutting surface.
Trim the copy of the cutting surface using the #edgeCurves we just created, and discard the outer portions. What you have left over is a #patchSurface that we join with the trimmed scroll surface from the previous step.
At this point you should have a single scroll surface, part of which is the patch surface. This scroll surface should have two #planarHoles — one in the front and the other in the rear.
Cap both planar holes to get a solid scroll object. Be sure to check the object for #nakedEdges and #nonmanifoldEdges to make sure that the object is airtight.