Can't move/drag on the axis I want

#1

I am modelling my house. It’s been going OK though a steep learning curve, but now I’m stuck.

The bottom-left room has a separate pitched roof, pitched in all 4 directions. I drew lines to form two triangles and then joined them with the blue line, the ridge line of the roof. It looks OK but when I try to move that line, it will move in any direction except the up/blue axis. Whatever I do I can’t get that as the inference, it keeps looking right then I rotate and realise it’s just a perspective trick:
image

Is there a way to force this to do what I want? And is the fact I’m having problems indicative that I’m doing something fundamentally wrong, or is it just part of learning the tool?

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#2

Closer fiddling seems to indicate something is locked/blocking this motion. Some side-effect of faces and lines auto-joining I suspect, meaning my model is doing something I cannot see with the naked eye.

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#4

You need to invoke auto fold with the Move tool. Get the tool and hold Command while moving the selected edge up.

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#6

One simple trick is to use the edge of the building as a guide to make it move up.
Raise

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#7

Another tip along with autofold, Have you explored using the arrow keys to lock movement to only one axis.

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#8

@Box & @endlessfix I hadn’t known either of those little tricks, very handy!

I’ve not come across autofold, or at least I hadn’t used it, so I’ll look that up. Thanks :slight_smile:

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#9

Move + Alt - to force the move by ‘auto-folding’ some connected faces if necessary, otherwise the movement could be prevented in that axis by connected geometry…

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#10

Here is an example, in this case you haven’t broken the corners so even following the edge still moves the selection along the wrong axis, but as soon as you hit alt you get the corner folds that allow the selection to move up.
AutoFold

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closed #11

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