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David_M1-Visitor
1-Visitor
March 3, 2016
Question

Adjust model bounding-box for better fit-to-screen?

  • March 3, 2016
  • 3 replies
  • 3513 views

Often with top-down assembly the bounding boxes for parts are not representative of the part, and this means that the automatic fit-to-screen function doesn't operate as well as it could. How can I adjust the bounding-box for a part:

a) manually?

b) automatically around all solid geometry?

c) automatically around all geometry?

Thanks


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3 replies

T
23-Emerald IV
TomU23-Emerald IV
23-Emerald IV
March 5, 2016

Nope, editing these values is not possible.

There was a recent change that allows datums to be excluded from the bounding box size calculations.

https://support.ptc.com/appserver/cs/view/solution.jsp?n=CS93540

T
23-Emerald IV
TomU23-Emerald IV
23-Emerald IV
March 5, 2016

If you don't have (or want to go to) these later builds, you can achieve similar results with Toolkit ($$$).

https://support.ptc.com/appserver/cs/view/solution.jsp?n=CS222336

https://support.ptc.com/appserver/cs/view/solution.jsp?n=CS93540

C
ckeller1-Visitor
1-Visitor
July 18, 2016

It drives me nuts that I have to consider how I define certain datums since they influence how the model is zoomed in on.  I currently have a model that I have to re-think because of some stupid arbitrarily rotated plane intersected with the mid-plane gives me the "horizontal" for that sketching plane.  but this ends up being horrible because the intersection is 10x the longest dimension away from the default Csys.  so when I put the model in perspective, or when I just zoom-all, the model is tiny! it's makin' me bonkers

D
dschenken1-Visitor
1-Visitor
July 18, 2016

When you create the datum, click the second tab (also available at redefine) to set the size. You can either drag the extent with drag handles or tell it to fit another feature. Viola - problem solved.

    C
    ckeller1-Visitor
    1-Visitor
    July 20, 2016

    unfortunately no, it doesn't solve the problem if moving the bounds of the plane anywhere within it's planar space does not bring it closer to the model, still screwed.

    though technically in some cases that could be a work-around.

    so here's the basic case - 3 points constrain the curve.  the curve is a spline that must be planar and NOT a combined projection for numerous reasons.  The configuration below was how it started, a moderate angle, no problem.

    2016-07-20_00h53_27.png

    However, adjustments to the design required a much steeper angle, which brought me to the following and this isn't even as bad as it was to be honest.

    2016-07-20_00h54_02.png

    the final conclusion was to re-define how the sketch plane was constructed entirely.  it isn't a problem, it's just tedious extra work for something that shouldn't be included in the bounding box if it's layered off.

    bounding box for zoom-extents should be limited to only what is visible!

    here was the final work-around which doesn't even require any hand-wavy nonsense of adjusting the plane's display-outline (which I'll admit can be very cool at times, but not very well parametric.

    in the following 2 examples the horizontal planes are parallel.  in the "new way" the plane is always stuck to the datum point but needs an extra datum plane to define it,  But it is 100% parallel, and will never cause the bounding box issue.

    new way highlighted

    2016-07-20_01h09_10.png

    old way highlighted

    2016-07-20_01h09_20.png

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