3d Software doesnt make sense. Someone please give me some advice

Discussion in 'General Discussion' started by Raizer04, Oct 27, 2012.

  1. Raizer04
    Raizer04 New Member

    Attached Files:

  2. stonysmith
    stonysmith Well-Known Member Moderator
    The simple answer here is that computers are stupid, and that the computer can't read your mind. :D
    Most "Hole Correction" algorithms tend to go with a simpler geometry rather than try to create a more complex one.

    Rather than use your complex example, let me try to explain using a simpler item:
    Edges.jpg

    Here on the left, you can see that there are two holes (top/bottom), but there is no internal structure.
    If you use most any "Hole Correction" tool, it is going to just plug the two holes as surface defects, and not create a passage THRU the object.
    What is necessary is to have the vertexes that I've outlined on the right in white, and you must have the faces shown in yellow.
    Your model is missing these "internal" faces.

    To repair this, you must do one of two things:
    1) repeat the original subtraction, ensuring that interior faces are created properly.
    2) if your tool allows, you could add the vertexes and faces manually
     
  3. stonysmith
    stonysmith Well-Known Member Moderator
    Here's my attempt at fixing it.
     

    Attached Files:

  4. mygadgetlife
    mygadgetlife Well-Known Member
    Hi,

    I looked at the postings you referred to and your correspondent is correct - the model is non-manifold, meaning it's outer 'skin' is not continuous and has holes. This is why your model will not print correctly.

    You need to go back to your software to correct the issue. Believe me, if you're a beginner like me, this is easier said than done.

    Best of luck, and you can always post back here if you have difficulties.
     
  5. Raizer04
    Raizer04 New Member
    I....I...I think i love you. That is exactly what I needed. What software did you use to add the vertexes and faces manually?
     
  6. Fredd
    Fredd New Member
    Bah, I was too busy making an image. Your problems were pretty well answered. Proper facing normals are on the image on the right side.:)
    WATERTIGHT.jpg
     
  7. stonysmith
    stonysmith Well-Known Member Moderator
    I use an old school (now free) program called TrueSpace. If you want to try it, you need version 7.6.0. The 'update' version 7.6.1 removed the native STL export from the package.

    People (my kids) ask me why I hang onto such an old program (this version from 2008).. It's mostly because I've got "a bit of experience" with the program... I started working with Version 1 way back in 1994. :D

     
  8. Raizer04
    Raizer04 New Member
    Well thank you everyone for attempting to help me with this. I tried to recreate the file myself (so that I can learn to do this rather than asking people), and I smoothed out the structures within the thumb and eliminated all the unnessesary vertices and faces using Blender (that TrueSpace 7.6 wouldnt even let me import an stl). I think I am getting close, but I cant find out what I am doing wrong compared to the one that he supplied that worked.....Whats different compared to the one he did?


     

    Attached Files:

  9. stonysmith
    stonysmith Well-Known Member Moderator
    Make sure that you downloaded TS 7.6.0 .. the version 7.6.1 had the STL option removed from it.

    As to what you're doing wrong in blender... there are several people here on the forum much more capable with Blender than I currently am.
     
  10. Raizer04
    Raizer04 New Member
    I was looking under "File" in that software for import and couldnt find it, finally found how to properly import the file. So what did you do to clear the stuff in that software?
     
  11. jrey
    jrey New Member
    Hey! I started on truespace version 1 back in 95! (I was 12 then) I switched to 3dsmax in 2004, but truespace holds a special place in my heart. I met Roman Ormandy at Siggraph 2000 and he bought a group of us users dinner. I hate that it was sold off to Microsoft, and then abandoned.
     
  12. Bathsheba
    Bathsheba Well-Known Member
    I'm such a nub.

    Hey, if you were a big software company, why else would you buy small ones other than to kill them? Just keeps on happening.
    :(
     
  13. megmaltese
    megmaltese New Member
    It's simple: small companies CAN be a risk for larger companies.
    They eat share of market and if their product is better or can become better, they can take action to wipe them out so to not have any menace around.
    This sucks really, but that's how it is.
    I think there should be made some law to not allow this.
    This is killing options for the users and it's not moral from my point of view.
     
  14. jrey
    jrey New Member
    In the case of Microsoft buying Caligari that doesn't really apply. They initially bought it to offer something like sketchup for their map system to compete with google. I guess it wasn't what they thought it was.
     
  15. megmaltese
    megmaltese New Member
    Yeah that was another reason of course, but usually it's like that.
    Autodesk bought Maya (unluckily) to have income from selling Maya instead than losses.
    I was scared that they would cut off the project but at least they hold it alive.