1 Reply Latest reply on Apr 1, 2014 8:51 PM by Jerry Steiger

    spline extrudée en surface à facette ???

    Eric Benessy

      PAs top comme titre mais mieux vaux une bonne capture :

       

      http://image.noelshack.com/fichiers/2014/13/1395776408-bug-surface-lissee.jpg

      J'ai une surface lissée à base de splines qui donne une forme de ballon de rugby ouvert aux extrémités et en voulant la fermer avec "surface remplie" je me suis rendu compte que le rendu 3d de la surface ne collait avec l'esquisse de section à base de spline, la surface est à facette...

       

      Est une subtilité du moteur de rendu ?

       

      Car pour la fermer je ne peut que sélectionner la spline du dernier profil et je n'ai plus d'option de fusion et j'ai une surface qui colle parfaitement à la spline et qui ne colle plus à la surface lissée et qui est indépendante de la surface lissée.

      Si je cache ce dernier profil de la surface j'ai alors l'option de fusion activable et le surface lissage est sélectionnable afin d'avoir une surface qui bouche parfaitement la surface lissée mais cette surface obtenue épouse les facettes de la surface lissée  Evil

       

       

      J'ai testé en faisant une simple spline extrudé en surface et là c'est flagrant : la section de surface produite est à facette et n'épouse pas parfaitement la spline comme ça le fairait parfaitement avec un cercle ou un polygone extrudé ....

       

      Merci d'avance  :wink:

        • Re: spline extrudée en surface à facette ???
          Jerry Steiger

          Eric,

           

          Having forgotten what little French I ever knew, I used the Google Translator to get the following:

           

          "I have a smoothed spline basis which gives a rugby ball shaped open-ended and wanting to close with " busy area " I found that the area has 3d rendering of the surface stuck with sketch based spline section , the surface is faceted ...

          Is a subtle rendering engine ?

          As to close I can only select the last spline profile and I have no option fusion and I have a surface that fits perfectly with the spline and no longer sticks to the smooth surface and is independent the smoothed surface.

          If I hide it surface profile I then activated the option of merging and smoothing surface is selectable to have a surface that mouth perfectly smooth surface, but this surface obtained wife facets of the surface smoothed Evil

          I tried doing a simple extruded spline surface and there is obvious: the surface section is produced facet and not perfectly matches the spline as it perfectly with climbing on a circle or polygon extruded ... .

          Thank you in advance: wink:"

           

          I am not sure I understand, but it sounds like you made a smooth shape like a Rugby ball, but with the ends open and you are trying to close the shape. You are worried that the open ends look faceted and wonder if that could be a problem with the rendering. Yes, there are limits to how well SolidWorks renders the shapes and you will often see faceted edges where the real geometry is smooth. Under Tools/Options/Document Properties/Image Quality, try pushing the slider on "Wireframe and high quality HLR/HLV resolution" all the way to the right to the "High (slower)" end.

           

          You might try a Loft or Boundary Surface to a Point or a Fill Surface to close the end. You might want to add some Guide Curves with the Loft or Boundary or Constraint Curves with the Fill Surface. Use the Edge of the open surface, not the splines, as the starting edges of your closing surface.

           

          Jerry S.