New Feature: Add design grid

[Susan Spencer]

It may help designers to construct a curve, etc. if there is a ruled design grid behind the pattern pieces. The designer can select the grid size (1cm, 5cm, 1in, 4in lines)

There can be a picklist of predefined patternmaking grids, based on industry patternmaking paper.

Requested by Gabriela Guasti Rocha at Fashion Hack Day, Student at UDK Berlin

[Roman Telezhynskyi]

Should be grid as non interactive background?

[Susan Spencer]

Yes, non-interactive background.

[Roman Telezhynskyi]

Not really super important for now.

[Holger Pandel]

See this as an attempt to combine #260 and this issue here:

It could be a good idea to create a user-definable grid layout not only based on common grid patterns as proposed here, but as individual lines a user can define based on a starting point (maybe the pattern root) up- and downwards and left/right, with their distance based on concrete calues or calculations dereived from the measurement table. This might help in different construction workflow ways of thinking: based on a strict common grid system, based on individual help lines, etc.

So you could have two different ways of grid creation: - create an even grid layout up/down/left/right with x ( i. e. 1cm, 5cm, 1in, 4in lines) distance - create a list with "distance-from-pattern-root values" (in or cm) and only draw those lines, i. e.

• 3.47 (x) up - ( ) down - ( ) left - ( ) right
• 5.67 ( ) up - (x) down - ( ) left - ( ) right
• 24.5 ( ) up - (x) down - ( ) left - ( ) right
• (heigth+7) ( ) up - (x) down - ( ) left - ( ) right
• 12.0 ( ) up - ( ) down - (x) left - ( ) right
• 30.8 ( ) up - ( ) down - (x) left - ( ) right
• (chest_widht/4) ( ) up - ( ) down - ( ) left - (x) right

Direction values are based on the root point of the pattern.

[Susan Spencer]

I see this as a separate grid function, more like issue #260. I think we should reopen #260

The workaround suggested for issue #260 was to define several pattern pieces into a single Draw pattern piece group. But this suggestion is not complete as a response to the issue, a design grid like this is still required.

Many flat pattern systems utilize this system, though these systems don't always display the lines. So it would be useful for most Valentina designers, using various pattern making systems.

[Keith Olson]

One important reason to specifically have a diagonal grid is to aid in lining up printed, tiled pages. It doesn't have to be very obvious; 10% gray is usually enough. I've assembled a LOT of these back in the day and can testify that a diagonal grid is the best way to make sure that any two pages line up perfectly.