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Claes Lundstrom

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About Claes Lundstrom

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    Greenhorn

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  • Homepage
    www.touchcad.com , www.lundstromdesign.com
  • Location
    Stockholm, Sweden

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    touchcad

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  1. Claes Lundstrom

    3D Shape question

    Very easy to do. Front view. Draw a line. Mirror and Duplicate to vertical. From the top view draw and arc using the three point mode having the same length as the line. Front view, rotate it to 45 degrees. Convert everything to NURBS. Ungroup and then loft into to a surface.
  2. Here is a thread on car modeling if anybody is interested :
  3. Claes Lundstrom

    Photogrammetry is Coming

    Point clouds are useful in many cases, but not always. Besides using point clouds, would it therefore also be possible to just extract user defined points, like you can do with for example PhotoModeler? I have done quite a lot of boat cover designs in the past, where we are essentially only interested in the panel edges, getting them as precise as possible, and then re-skin the model manually. In such a case you only need say 100 points or less. The rest of the cloud (99.9999%) is then basically waste info, and usually doesn't match the exact key points used for skinning.
  4. Claes Lundstrom

    Lumion and Renderworks. What do you think?

    Windows only it seems. Check out Keyshot too if you are interested in an external rendering program. About 2/3 of the price.
  5. Claes Lundstrom

    Laser cutting from Vectorworks file

    You are obviously not talking about sending an ordinary cutting file to a laser. More like engraving based on colors or shades of gray, which is a completely different thing. This is a different technique also possible do with laser machines but also for milling machines based, but instead of being based on vector couriers, it's based on pictures. What we talked about is actually cutting out contours, which you can also do with a laser. So, two completely different things. So, perhaps a relevant question is what 0.01 actually means. In VW it refers to millimeters, but I somehow doubt that any normal printer would actually be able to print such a thin line. Probably why the thinnest line is set to 0.05. Perhaps though your number refers to 0.01 inches, which is about 0.254 mm, and so on. Would make so much more sense. Here is a laser cut I did some years ago on my office laser cutter in acrylic glass. Nice cuts but very smelly.
  6. Claes Lundstrom

    Laser cutting from Vectorworks file

    Just export as an older version DXF. V14 or V12. The line thickness should be compensated by the the cutter driver if everything works as it should, depending on what material you cut and how thick it is. This applies to closed shapes, where it's obvious if the cut is to be on the inside or outside, or if you have closed shapes inside and already closed shape, for example holes on a given surface. In some variants of DXF, such as then AAMA-DXF (used in the industrial fabrics sector), you have special layer codes for outline cuts, cuts inside an online cut, texts, and just plot lines. Good idea to limit yourself to lines, arcs, and when using polylines only consisting of line segments and arcs. Avoid anything more complex, such as symbols and groups. Avoid fills of any kind. Illustrator adds absolutely nothing, as the precision is lower than CAD standard and their DXF converter is crap.
  7. Claes Lundstrom

    CNC DXF FILES

    Step 2 are as follows: Import the DXF again into VW. Does it work? Try importing it into another program for reference, for example SolidWorks E-drawings or Dassault Draftsight (Both can be download for free). Does it work ? If it works, you can be pretty sure that there is something wrong with the CNC side. Check with the supplier. Re-install, and so on.
  8. Claes Lundstrom

    CNC DXF FILES

    These milling programs often tend to be both a bit flaky and fragile, so here are a few other tips: - Save as an older version of DXF (try V14 or V12) - Simplify as much as possible: - Avoid using symbols - Avoid using filled objects - Explode (decompose in VW) objects before exporting and then Undo it back to civilization once exported (many programs have problems with VW polylines consisting of a mixture of corner types, holes etc, even from bigger suppliers like Adobe, Graphtec Silhouette Studio, etc) - Check that the receiving program actually reads curves properly. A super safe bet if it's a problem is to use lines, arcs and circles only for 2D paths. - Export DXF as TEXT and not Binary - Export and the import it again into VW to see if it reads properly. Test import the model in another free program such as Draftsight or SolidWorks E-drawings (none of them are particularly nice to work with but they do have very competent import filters).
  9. Claes Lundstrom

    CNC DXF FILES

    Check that you have the same (A) Codex and (B) Line Feed settings in both files in a programming oriented word processor such as BB Edit or Text Wrangler. Some of these programs have problems with Mac style line feeds, which are different from Windows style line feeds. /Claes
  10. Claes Lundstrom

    sketchup v vw for 3d modelling

    The model was direct exported from VW to Keyshot using the Collada format. KeyShot is basically a stand alone rendering program that reads from other programs via plug-ins, but also reads a wide range of file formats. I mostly tested it for product visualization, where it's more easy going than with architectural models. Rendering quality is by far the best of quite a few programs I used over the years. Very good textures. All materials tested (metallic paint, chrome, rubber, leather, glass ) looks very realistic. The background image used was a stock one, it's 360, and it instantly generates shadows and reflections in the model despite the model not really standing on something, and updates instantly and follows the model when you rotate the model. Photo realistic realtime updates. I'm testing on a demo, so what you see is a screen dump, and it takes say 5-10 seconds to get there after a change of say color of view. Seems to communicate well with VW in all sorts of file formats, including IGES, XT, STEP, DWG, DXF, 3DS, OBJ, VRML, Collada, etc. 3DS and Collada allows you to bring over Renderworks stuff like textures and lights, but where Collada works better as it exports as NURBS models, whereas 3DS exports as trimeshes. So far good then. Bad things, and the this is a colossal flaw, is that it can't smooth off a polygon or trimesh based model (what the ... where they thinking there not being able to do what virtually all other programs can do), and it's also quite expensive.
  11. Claes Lundstrom

    sketchup v vw for 3d modelling

    No program does everything, so therefore I almost always use combinations of tools. In this quick sketch, the NURBS surfaces where generated in TouchCAD, the solid modeling was done in VW, and the rendering in Keyshot. With a little practice, I guess it was under a days work, and all programs did something they where good at.
  12. Claes Lundstrom

    sketchup v vw for 3d modelling

    It's true that most of us use a combination of programs, depending on what you do and what you wish to achieve. Hands up everyone who uses Photoshop for example. Personally, I have about five or ten programs I consider my core inner circle programs. I would definitely not use Rhino for the bulk of architectural modeling, and not for 2D drafting. VW's NURBS implementation could be improved a lot (I almost always use another program there and import the geometry, though not Rhino), but just a few clean-ups in the user interface would take it much closer to Rhino, even though Rhino by no means is my favorite, it's still admittedly better than VW at this. Solidworks and the AutoDesk options are way more expensive, and besides Revit, mostly focusing more on mechanical modeling, so they are perhaps in another league. As for Revit and ArchiCAD, I somehow doubt that they are nowhere near as flexible as VW is for things other than Architectural work.
  13. Claes Lundstrom

    sketchup v vw for 3d modelling

    Personally, I see no point whatsoever to use SU for anything. Have it installed, but never use it. It looks cute for a few minutes, until you realize that most things takes longer to do than in other programs. The user interface, in my opinion, makes simple things complicated. The VW 2018 program folder is 7.6 times bigger than SU 2017, and the reason is simply that there are much more of everything. Simple can be good if you don't have time to learn a way more complicated program, but also means that you hit the roof of what's possible much quicker. SU has admittedly a far healthier third party market, but much of it is of somewhat questionable quality as it's done by amateurs.
  14. Claes Lundstrom

    Loft Surface

    Rendering quality is by far the best of quite a few programs I used over the years. Very good textures. All materials tested (metallic paint, chrome, rubber, leather, glass ) looks very realistic. The background image used was a stock one, it's 360, and it instantly generates shadows and reflections in the model despite the model not really standing on something, and updates instantly and follows the model when you rotate the model. Photo realistic realtime updates. I'm testing on a demo, so what you see are screen dumps from various views, and it takes say 5-10 seconds to get there after a change of say color of view. Seems to communicate well with VW in all sorts of file formats, including IGES, STEP, DWG, DXF, 3DS, OBJ, VRML, Collada, etc. 3DS and Collada allows you to bring over Renderworks stuff like textures and lights, but where Collada works better as it exports as NURBS models whereas 3DS exports as trimeshes. So far good then. Bad things, and the this is a colossal flaw, is that it can't smooth off a polygon or trimesh based model (what the ... where they thinking there not being able to do what virtual all other programs can do), and it's also quite expensive.
  15. Claes Lundstrom

    Loft Surface

    Just out of personal interest and curiosity, I played around some more with this concept to see if a decent car body shape could actually be extracted using this method. Here is what I did: I imported five untrimmed surfaces NURBS to start with (top left). I then cut openings for windows, doors, hood, grill, lights, added various panels to fill the openings and some details to make it look a little better in the rendering. I then exported the model to a rendering program called Keyshot (which I'm currently evaluating anyway) for rendering. All in all, I think it took me well under a days work.
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