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  1. #1
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    Default drawing on a sphere

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    Hi All!
    I am using Autocad 2010. I need to draw curved lines on the surface of a sphere, but i have no idea how to achieve this? I need to sweep a profile across the surface of the sphere.

    Thanks in advance!

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    Quote Originally Posted by jblengton View Post
    Hi All!
    I am using Autocad 2010. I need to draw curved lines on the surface of a sphere, but i have no idea how to achieve this? I need to sweep a profile across the surface of the sphere.

    Thanks in advance!
    Draw a sphere primitive, smooth the mesh, refine the mesh then use 3D poly line to snap to the mesh


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    Neat trick dude!
    "I have only come here seeking knowledge. Things they wouldn't teach me of in college." The Police

    Eat brains...gain more knowledge!

    I'm now a full member of the Society for the Promotion of Mediocrity in CAD. Standards? We don't need no stinkin' standards! Take whatever advice I offer and do the opposite.

  5. #5
    Luminous Being JD Mather's Avatar
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    Solid Sphere
    Extrude intersection shape for path.
    Imprint intersection
    xedges to extract path
    Sweep with align to path.
    Union or subtract if desired.
    (you might want to bump facetres to 10 and regen on the file I attached.)
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    Last edited by JD Mather; 23rd Oct 2009 at 03:41 pm.
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    http://home.pct.edu/~jmather/content..._Tutorials.htm

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    I have a .Net routine in development (AutoCAD 2009+, though not tested on 2010) that allows drawing on any face of a solid. Actually, it is more a mapping routine (compared to on surface drawing) but it may be of some use. I’ll post the DLL if anyone is interested.
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    Thanks guys for all the help! You guys are brilliant. Seant I would really like to explore the Net routine!

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    Tested only with AutoCAD 2009 32bit, but hopefully compatible with 2010 and 64bit.

    Also, may be compatible with AutoCAD’s 2007 and 2008 if a copy of acdbmgdbrep.dll is available.

    CsVectorMap.dll is the callable routine but keep both CsVectorMap.dll and STSClib_SolSubentSel.dll together in the same folder.


    To perform a mapping operation, first:

    Command: Netload
    Navigate to the appropriate folder and select CsVectorMap.dll

    Then:

    Command: CPM
    To create “canvas” border of a selected face.
    [Border will always be near WCS origin. The code responsible for the general shape and scale of border still needs some tweaking].

    Create some geometry within the canvas border.

    Finally:

    Command: CVP

    Select the “canvas” object, then select all the lines and curves to be mapped.

    Warning: This is a beta routine and should be used with sensible caution. Save all working AutoCAD sessions, isolate pertinent geometry into its own file, then return mapped geometry back to it’s final location.
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    THis reply is awsome ! SEANT, you should forward this to the tutorial section, neat work
    ....always perform Beyond what is expected.

  10. #10
    Forum Deity SEANT's Avatar
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    Quote Originally Posted by nocturne00 View Post
    THis reply is awsome ! SEANT, you should forward this to the tutorial section, neat work


    Thanks.

    Perhaps when all issues have been resolved I’ll submit it for inclusion to CadTutor - Resources.

    With regard to issues . . . . I will be interested to hear if it performs as expected on 64 bit and/or 2010.
    Last edited by SEANT; 26th Oct 2009 at 08:33 am. Reason: spelling

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