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accumulative for loop translate

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MagnusL3D
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I thought by moving the box in this file with $ZMAX every loop it would end up beside each other but it becomes accumulative..not sure why.. in the end I was planing to switch between boxes with different sizes making them stack nicley no matter the size because the $ZMAX would always move the the correct distance.

clearly I am wrong

Attachments:
forloop.hipnc (51.2 KB)

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Enivob
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My guess is that ZMAX gets extended each time the loop iterates. So create an external variable, outside the loop, that you can use as a constant inside the loop.

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Untitled-2.jpg (190.3 KB)
ap_zmax_forloop.hipnc.hiplc (53.1 KB)

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MagnusL3D
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Well I want the current $ZMAX of the current itteration and transform the box with that value, so I could have differently sized boxes and yet stack them up neatly. I am not sure this solution would solve that ?
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MagnusL3D
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Here is a solution for what I want todo that sort of work's not sure it handles all cases yet but for this test it does.
Edited by MagnusL3D - July 15, 2016 11:31:49

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forloop2.hipnc (57.9 KB)

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blackpixel
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It's happening because each iteration you offset an already offset box. If you chain multiple transform nodes with $ZMAX you get the same effect without the merging.
One way would be to fetch the geometry from the outside each time ( which you did in your second file ) or simply use $ZMAX - $ZMIN inside the loop instead.
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MagnusL3D
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Thanks Blackpixel, yeah I figured it was doing something like that. Thats why I came up with my 2nd solution. And I tried yours out aswell, got it working but just one a single input mesh. Can't get it to work with different meshes for some reason.
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blackpixel
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Yep, you are correct. Your second setup is the right way to go then
You can simplify it a bit though. Get rid of that attrib create and get the ZMAX from the bbox() expression directly in the transform : bbox( “../foreach_begin1”, D_ZMAX) + $ZMAX
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