surface from flat curves All  1-7  8-17

 From: Michael Gibson 3 Aug 2007  (8 of 17)
 817.8 In reply to 817.6 > Michael when you get a moment (LOL) would you demo the best way > to use the project to curve features. I have my own work around but > I would like to know how it was designed to function. Basically it is a way to create a curve that is following along the shape of a surface, so that you can use that curve for further constructions. The most simple function is that you take a planar curve, select it, run Construct / Curve / Project, then select the surface you want to project on to. By default it will project perpendicular to the plane of the curve, but you can also pick 2 points to define a different projection direction if you want, before pushing "Done" to finish the project command. Here is a mini tutorial to show what kind of situation you might use this for. Say we want to create this shape, a sphere with grooves cut in it: The base sphere shape is simple, just draw it with Draw solid / Sphere. But to do the grooves, we're going to have to construct some shape that follows along the surface of the sphere. After drawing the sphere, I went to the Front view, and drew some curves using Draw curve / Freeform / Control points, that looked like this: Now we can project these curves on to the surface of the sphere. Select these 2d flat curves that were drawn in the front view, and run Construct / Curve / Project, then select the sphere as the projection target and push Done. After deleting the original 2D curves, you are now left with these curves that follow the surface of the sphere: Now these curves can be used for constructing the grooves by sweeping. To do the sweeps, I drew a little circle off to the side. When sweeping, if the sweep profile curve is away from the curve MoI will automatically move and rotate it in place, so it is often quick to draw the sweep profile off to the side and let MoI do the work of moving it into place rather than needing to place it yourself. Then I did 5 sweeps, for each one selecting the little circle, then running Sweep (you can use Right-click to repeat the last command also), then selecting one of those projected curves as the rail path curve. Now you can select the sphere and use Construct / Boolean / Difference to slice away the sweeps to create the final grooved sphere result. So basically when you want to construct something that kind of hugs along a surface, that's when you may want to use Project to set up the curves. One quick note - it is not necessary to project first before trimming a hole, there is an automatic projection built into Trim already. Hope this helps! - Michael

 From: phlatt5th (P5TH) 3 Aug 2007  (9 of 17)
 817.9 In reply to 817.8 That helps. Thanks Michael

 From: 3dvisuals dude (ODWYERVISUALS) 3 Aug 2007  (10 of 17)
 817.10 In reply to 817.8 Awesome! Thanks for that Michael. I've been using "project curves" for quite a while now every day and love that feature, it enables me to create models on the fly without the slightest concern for having any difficulties later in altering the mesh when an idea for a mesh feature occurs during modeling which would normally be a feature one would start from with polygonal modeling rather than add to a model already begun. Eyes in a head model, for instance. When one takes a sphere (or any model) in MOI and turns on "show points" (which sometimes first requires using "separate" on the surfaces) one can then readily shape that object by manipulating it's control points in 3d space to achieve some very organic-looking surface flow on that object and alter it's shape in very interesting ways. Using "project curves" with "trim" on such an altered object after it is shaped allows the introduction of new geometry points into the surfaces of that object, so it's easy to shape a head, for instance, and after the shape is perfected create eye sockets, nostrils, mouths, and ears which look perfect. Even though I love these tools and use them daily I still learned two new things from your brief tutorial above though, I didn't know that I could use sweep as you have above without prior positioning of the sweeping object (and that's a HUGE timesaver for me!) and I also didn't know that there was any "automatic projection" built into trim already! Awesome timesavers!!! Thanks! - 3dvisuals dude

 From: Michael Gibson 3 Aug 2007  (11 of 17)
 817.11 In reply to 817.10 I'm glad that was useful! The proper documentation will have details about stuff like this in it, so that should help out a lot when it is ready. SIGGRAPH is kind of getting in the way right now, but once I get back from SIGGRAPH I should be able to focus on the documentation with more full attention. - Michael

 From: eddi 4 Aug 2007  (12 of 17)
 817.12 In reply to 817.3 HI Alberto, Here one way with Twist(=Rotate) Draw Lines Use Loft Deselect upper edge and rotate lower edge (this is Twist, Loft is dynamic) Boole Profile with Plane Shell and Filet Array BestReg`s EDDI EDITED: 5 Aug 2007 by EDDI Attachments:

 From: alverman (ALBERTO) 5 Aug 2007  (13 of 17)
 817.13 In reply to 817.12 Big eddi !! Excuse but also being be clearly is not successful to make it. You can explain it still better to me? Thanks, Alberto

 From: eddi 5 Aug 2007  (14 of 17)
 817.14 In reply to 817.13 Hi Alberto, Schiii....10x Sorry, in step 2 (Picture2) use Loft-Command, not a Sweep-Command (this was wrong,sorry) >You can explain it still better to me? Yes, later, this evening. BestReg`s EDDI