neobobkrause wrote:@dorsai3d: I want to apologize if I've offended you. That wasn't my intent. I'm just trying to have an open dialogue. But I might suggest that you not use the phrase 'ugly hack' to refer to somebody else's suggestion if you're going to be offended by somebody using the same phrase to refer to your ideas.
I'd argue that it is inherently ugly; especially given backface culling. For example, this is supposed to be a symmetrical section of fuselage:
neobobkrause wrote:@dorsai3d's suggestion that even a wall that's printed just a single shell thick is an object that has volume. I'll begin by agreeing with you. A manifold mesh like this is a volume having a thickness of zero -- if we are rounding our volume calculation to increments of the Extrusion Width.
I... It's manifold, meaning it has a nonzero volume. That's part of the definition of the word! We're not rounding our volume to zero if it's extrusion width, we're looking to extrude the target volume described by the manifold model.
neobobkrause wrote:Now let me disagree with @Dorsai3d. I suggest that a shape only has MEANINGFUL volume when the mesh is manifold and where the thickness is great enough to infill. A slicer can never infill a wall having a thickness of a single shell..
Manifold. You keep using this word, but I don't think you're grasping what it means... Infill has nothing to do with the manifold-ness of a model.
http://blender.stackexchange.com/questi ... d-geometry
http://www.shapeways.com/tutorials/fixi ... old-models
http://3dprintingninja.blogspot.com/201 ... tmare.html
The goal is to create a physical model that matches the volume occupied by the 3D model created to describe the print. Infill is a convenience to provide structure while reducing print time, material usage, and/or weight.
neobobkrause wrote:Though I appreciate that @Dorsai3d and I aren't going to agree on this point, I see appreciable functional value in a slicer properly handling non-manifold meshes the same way it would process a zero volume manifold mesh.
Repeat after me: There is no such thing as a zero volume manifold mesh.