I have a model with open and closed surfaces. I am going to machine it in a 3 axis mill and want to make a 3D print to see what it will look like. Since there won’t be undercuts in the z axis, I want to extrude all the objects to a z plane and make an stl to print.
Open surfaces can be extruded. But I don’t know how to handle other objects. For example, I have a closed surface that is a helix with a circle swept along it. I have tried a few approaches - one was making a silhouette and extruding that curve. That gave me the sides, but I don’t know how to attach everything to make a solid.
It seems like there could be some way to do this in Grasshopper. Like by creating an array of z vectors which intersect the first thing they hit on the model and then creating a mesh from the intersections.