I have tried everything to get rid of that, but when I do, it opens up a portion on either side of where that line was. That didn't even occur to me at the time.Īs for that line across the top, that's an artifact from pushing the material above the arc off the model to remove it. That would leave inner walls on the outside of the new model. I had to extrude a circle up, make it a group, run on it against the rest of the model (as a group), explode the result and remove the extra tube above the model. The only way I could find to create the holes in that odd shape, though, does explain the reversed faces. I always have trouble recognizing reversed faces - the colors are so similar to me. The holes are now clean holes in Cura and Slic3r reports that there are no errors - Manifold = Yes! Reversing the face on the holes fixed everything.
I think that was an artifact of my cutting the model down. That blotch you mentioned doesn't show up in the original. Which you will have to manually correct them.Īctually, that was a cut down version of my true model. This automatic reassignment of normal works well for simple push/pull.īut if you are doing push/pull on complex model, this can cause the normal to be reassigned in unexpected direction, Sketchup will automatically reassign normals, so that outside facing normals are white and inside facing normals are grey.ĭoesn't matter whether you pull the rectangle upward to create the box, or downward to create the box. However, as I have stated previously, normal has to be assigned and defined no matter what.Īnd when you use push/pull tool to make a box from this rectangle, so you may want to paint one side with easy to see color)īut you see the problem here already, since the rectangle is just 2 dimensional face, there is no inside or outside. (the shade changes according to orientation, so it is variation of light grey, and variation of darker gray, you just have to look at them carefully to differentiate them, but it is sometimes not so easy. Sketchup default color scheme for this is white for the positive normal (facing outside), gray for negative normal (facing inside). You can see this by rotating the view to see the rectangle from top and bottom. Normal is assigned anytime a face is created.įor example, when you draw a rectangle in sketchup, that rectangle would have normal assigned to it. Select those faces that are not painted correctly and reverse them, and if you see correct color, then the normals are now correct. Reversing all faces also help you to see flipped faces. If some faces are not painted, it shows that those faces are flipped. Then rotate the view around to inspect if all faces are painted. What you need to do is, select all faces, and apply dark paint to all faces. Some 3d softwares have tool to "unify normals" of all faces in an object, but this function don't always work.īut there is a trick to examine and inspect if all the normals are oriented correctly on your model in sketchup. Normal of face tells which side is facing the outside, and which side is facing the inside of an object.
However, for some reason sketchup does not use this term. This term is used in advanced geometry, which is not taught in high schools or even colleges unless you are mathematics major. I've tried Blender a couple of times and am still too overwhelmed to use it for any project.Orientation of face is technically called "normal" (not 'normal' in conventional sense of the word).
Sketchup number of facets on circle how to#
Making 3D objects can be a challenge when Sketchup can't figure out how to blend a surface into another and you spend way too much time trying to repair the little holes that are left over.įor 2 & 2.5D work, I'm now using Affinity Designer and for 2.5 & 3D work I use Freecad. There are some good addons that make it useful, but, IMO, there are better choices elsewhere. As Adrian aptly points out, Sketchup has its good points (it's certainly easier to learn than Blender and maybe FreeCad), but little things like the standard number of facets on a circle is twelve (maybe it's 24 now) which leaves a very rough looking hole (or tube if that's what you're creating). I've stopped subscribing to it this year as I no longer want to pay an annual fee to maintain it when it's only getting more complicated without adding any value to me. I've used Sketchup for years for Architectural, Woodworking, 2D Laser work, and 3D Printing.