Okay, I've zipped some source code that reproduces the problem.  Download:

http://www.cnccookbook.com/img/GWizardE/GridIssues/LeGrid.zip

I'm using Away3D 2.4.  The source files go in a Flex project called
"LeGrid".

If you bring it up, there is nothing.  Press the Zoom! button to see the
grid painted correctly.  Now click the Bug! button to see the problem.  The
Bug! button is simply dropping us down in Z closer to the origin, but it
doesn't take long (1 click on my machine with the window zoomed) to see the
issue.

Hope this helps!

Best,

BW

On Wed, May 19, 2010 at 7:47 PM, Bob Warfield <[email protected]> wrote:

> I'll see what I can do.  It'll take some doing to refactor things apart to
> get something minimal that just draws the grid in the same situation.
>
> Best,
>
> BW
>
>   On Wed, May 19, 2010 at 4:04 PM, Rob Bateman <[email protected]>wrote:
>
>> Hey Bob
>>
>> hmm, another problem reporting segments disappearing...
>>
>> not sure whats going on here, but would it be possible to provide a test
>> class? something simple that exhibits the bug so that we can try and debug
>> the problem?
>>
>> cheers
>>
>> Rob
>>
>>
>> On Wed, May 19, 2010 at 12:20 AM, BobWarfield <[email protected]>wrote:
>>
>>> I've got a CAD/CAM application I'm playing with and having some
>>> problems with display artifacts.  All objects are Segments that are
>>> added to a couple of Meshes.  One Mesh is a background grid, and the
>>> other is the CAD object.
>>>
>>> Here is a view from the top of a typical CAD drawing:
>>>
>>> http://www.cnccookbook.com/img/GWizardE/GridIssues/Top.jpg
>>>
>>> It's very well behaved.
>>>
>>> Now I move the camera to present a perspective view.  The only change
>>> between the two is that the camera has moved to a new location:
>>>
>>> http://www.cnccookbook.com/img/GWizardE/GridIssues/Persp1.jpg
>>>
>>> Note how some grid segments are missing altogether in the foreground,
>>> and others are looking odd.  If I move the camera closer, it gets
>>> worse:
>>>
>>> http://www.cnccookbook.com/img/GWizardE/GridIssues/Persp2.jpg
>>>
>>> If I move the camera just a little further away, it looks fine:
>>>
>>> http://www.cnccookbook.com/img/GWizardE/GridIssues/Persp4.jpg
>>>
>>> How can I fix this?
>>>
>>> Thanks,
>>>
>>> Bob W.
>>>
>>
>>
>>
>>  --
>> Rob Bateman
>> Flash Development & Consultancy
>>
>> [email protected]
>> www.infiniteturtles.co.uk
>> www.away3d.com
>>
>
>

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