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NURBS-STICH, ATTACH OR BLEND?

topic posted Fri, June 9, 2006 - 6:46 AM by  Sybren 		Share/Save/Bookmark
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I have multiple nurb spheres wich I need to connect, smootly.
What is the most easy way to do this. And which "deathtraps" should I look out for?
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Sybren
offline Sybren
Netherlands
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  • Clear
    Clear
    offline 181

    Re: NURBS-STICH, ATTACH OR BLEND?

    Fri, June 9, 2006 - 3:49 PM
    I don't have an answer. It really depends on how you're going to render the thing. Is it textured? Is it part of an animated character? Maybe blobby particles are what you need?
    Nurbs suck, sorry. Polys rule foreverz! ;)
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  • vargas
    vargas
    offline 27

    Re: NURBS-STICH, ATTACH OR BLEND?

    Fri, June 9, 2006 - 9:14 PM
    circular fillet?

    NURBS are nortoriously difficult to rig and animate, but if you only need a seamless connection and don't plan on rigging, then the fillet works great. The studio I work at used NURBS for ages and have recently converted to polys/sub-d. There are obvious benefits, but as also pointed out by Clear, polys do rock these days and what we can do with Renderman and Mental Rays makes NURBS almost useless.

    Animating a fillet would be a "deathtrap" but UVs are automatic and the texture placement is pretty snappy too.
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    • stuart
      stuart
      offline 78

      Re: NURBS-STICH, ATTACH OR BLEND?

      Fri, June 15, 2007 - 5:37 PM
      "what we can do with Renderman and Mental Rays makes NURBS almost useless."

      I'm really not clear on how your render pipeline affects your modeling technique, let alone makes one very viable technique useless. Silly. I model using both but learned on NURBS first. Some objects/forms simply cry out for one toolset vs the other. If you don't know both, well, you have a hole in your arsenal.

      as per the topic, attach VS blend, I assume you mean the radio button in the attach surfaces tool box? I would need more info to give a decent answer.
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  • Geo
    Geo
    offline 104

    Re: NURBS-STICH, ATTACH OR BLEND?

    Sat, June 10, 2006 - 10:43 PM
    This doesn't make sense because spheres are closed surfaces.... along which open edge are you going to stitch/attach?

    I'm with the others - poly poly poly.
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    • vargas
      vargas
      offline 27

      Re: NURBS-STICH, ATTACH OR BLEND?

      Tue, June 13, 2006 - 8:32 PM
      I agree polys, polys, polys.

      The original post had little detail, so we're all just speculating. I was following the "blend" portion of the subject, which you can accomplish with a fillet, or other surfacing operations which don't require open edges.

      Create two nurbs spheres, create a freeform fillet "blend" from their isoparms. A third surface is created and it will be seamless.
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  • stuart
    stuart
    offline 78

    Re: NURBS-STICH, ATTACH OR BLEND?

    Fri, June 15, 2007 - 5:42 PM
    attaching works for joining the ends of nurbs surfaces that have the same parameterization. Whenset up properly you can get wonderful results but the prep, which is simple, is quite critical.

    Looking at your image this situation does not call for an attach. A fillet should do just fine, but only if this is not a deforming object.
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