#45 Grid Zoom Out Hang

Reproduce:
New Database
Draw Grid
Zoom out quickly with left mouse button
mged hangs

[Anonymous]

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*Repeatedly zoom out - quickly

[Sean Morrison]

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I don't see this behavior here. Which operating system are you using?
Also, if you run mged in classic mode, does it still hang?

To run in classic mode, run mged -c file.g and select X as the display
type. There will be no menus but all of the mouse controls and commands
are otherwise the same.

[Anonymous]

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same problem

start , open new database , turn on grid
and zoom out (5 or 6 rapid left mouse clicks )

o/s is suse 9.3 running kde v3.4

as to if it still locks up in classic mode ?
don't know how to turn on the grid in classic mode

Dave

[Lee Butler]

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I can reproduce this.

mged asdf.g
mged> in ball sph 0 0 0 1
Settings->Grid->Draw Grid
zooming out to 2048 caused a hang

mged asdf.g
mged> in ball sph 0 0 0 1024
Settings->Grid->Draw Grid
zooming out to 2097152 caused a hang.

So it seems to be a problem of relative zooming when grid is on. I didn't find
this to be related to the speed of zooming.

Turning the grid off causes the bug to disappear, so this is definitely in the
grid handling code.

[John Anderson]

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The problem was in the calculations used to decide when to
not draw the grid. Integer overflow was the culprit. I added
a check for a negative result. This will eliminate the hang,
but a better algorithm is needed here.