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Thread: Unable to flip a line drawing?

  1. #1
    Join Date
    Jan 2009
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    Denver, Colorado, United States
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    273

    Default Unable to flip a line drawing?

    So, using the connected line, line, and arc tools, plus a couple of vertices changed from free to tangent, I created half of a shape.
    This is far from the first time I have done this.

    I then copied and pasted the shape, with the intention of flipping and joining them into one.
    But I could not flip the pasted shape. Finding that odd, I deleted the pasted shape and tried again.
    Still no luck. So then I deleted the second pasted shape, and tried to flip the original.

    • Horizontal - no go.
    • Vertical - no go.
    • Mirrored - works fine on any direction. But the mirrored shape, as I knew, won't join to the original.


    So what did I do, and how do I undo it?
    Why can I not flip this shape?
    - Ken
    Later model "B" Machine with CarveTight and Rubber belt upgrades
    RNB Model "A" Dust Collection, Scanning Probe, Rotary Jig
    Designer 3, Conforming Vectors, STL Importer, DXF Importer, Rotary, Basic, Pattern Editor (Probe), Advanced 3D, Centerline

  2. #2
    Join Date
    Nov 2008
    Location
    Vancouver Island
    Posts
    8,193

    Default

    Not being able to flip a line drawing has to do with constraints. There can be implicit constraints like where arcs are tangent to lines or other arcs. What I do is convert arcs to line segments, flip, and then convert back. (Save before converting back. Converting to arcs can cause crashes in certain cases.)

  3. #3
    Join Date
    Jan 2009
    Location
    Denver, Colorado, United States
    Posts
    273

    Default

    That really sucks...because the main reason to copy/flip is to ensure the dozen or so arc segments are perfectly mirrored.
    If I convert to lines and back, I lose the arc profiles I had set.

    And seems odd... because I am pretty sure I have flipped with arcs+lines in the past.
    - Ken
    Later model "B" Machine with CarveTight and Rubber belt upgrades
    RNB Model "A" Dust Collection, Scanning Probe, Rotary Jig
    Designer 3, Conforming Vectors, STL Importer, DXF Importer, Rotary, Basic, Pattern Editor (Probe), Advanced 3D, Centerline

  4. #4
    Join Date
    Jan 2009
    Location
    Denver, Colorado, United States
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    273

    Default

    Okay, your reply got me thinking.
    I knew beyond any doubt that I had worked with arcs and lines before.
    The only thing I wasn't sure I had done in the past was using tangent vertices.
    So, I changed those back to free vertices. And immediately tried flipping, and it works.
    And, since the change from tangent to free did not in any way affect the already adjusted/set curves, all is well.
    - Ken
    Later model "B" Machine with CarveTight and Rubber belt upgrades
    RNB Model "A" Dust Collection, Scanning Probe, Rotary Jig
    Designer 3, Conforming Vectors, STL Importer, DXF Importer, Rotary, Basic, Pattern Editor (Probe), Advanced 3D, Centerline

  5. #5
    Join Date
    Nov 2008
    Location
    Vancouver Island
    Posts
    8,193

    Default

    Good one. I have had problems with arcs even without the tangent vertices.

    Edit: Now I remember! Tangent vertices stop flipping.

    Flip this:
    Attached Files Attached Files
    Last edited by bergerud; 09-09-2016 at 04:47 PM.

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