UserManual:Creating Layouts: Difference between revisions
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Before you will be able to export or print pattern you should create a layout.
Creating really powerful layout generator is hard task. The main goal of current implementation is to allow you work with pattern and quickly export your result. It was design to quickly create a valid layout using your PC power. Very often a layout will be far from optimal for you. But if you are not satisfied with automatically generated layout you always can export it in SVG (or any other vector based formats) and rearrange workpieces as you need.
To create a layout you must pass at least one workpiece to Layout generator. If you have at least one workpiece, but still can't start creating because
=== Layout options ===
[[File:AutogenerateLayoutDialog.png|alt=A picture of the Layout options dialog.]]<br />
[[File:Schermafbeelding_2017-04-07_om_13.59.21.png]]▼
==== Paper format ====
This
The common recommendation in this case is to select a paper size big enough to arrange the biggest
▲The common recommendation in this case is to select a paper size big enough to arrange the biggest workpiece in pattern.
<nowiki>*</nowiki>Of note
▲Some words about predefined options you can find in the dropdown list. Valentina exports data with resolution [https://en.wikipedia.org/wiki/Dots_per_inch 96 dpi]. You should take into account this value if want to export a pattern image and continue work with it. If you cannot find needed size from the list of predefined switch to Custom and edit size manually. ''Note. First time you will switch to Custom size Valentina will not change previous size values and you will not see difference from previous option.'' Fields Width and Height help you edit your custom size. Also you can choose between portrait or landscape sizes.
▲<nowiki>*</nowiki>Of note, is that the maximum height you may select, is limited to 866.986 cm. This is because of compatibility with certain exporting formats.
[[File:MarginsScreenshot.png|alt=|right]]
▲When you want print your layout latter you should also take care of printer margins.
The margin fields
Check option ''Ignore
====Layout options====
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This is the second most important part of the Layout generator after paper size. To effectively use it you should have some understanding how the Layout generator works. So, let's see which options do we have and how to effectively use them.
* '''Gap Width''' - distance between workpieces on layout. Imagine this as additional layout allowance around a workpiece. So, actual distance between workpieces will be twice bigger than the gap width. If you don't use an automatic seam allowance at least check if it is correct. If it is not
* '''Shift/Offset length''' - very important option that controls how accurate will work the Layout generator. The algorithm sees any workpiece as list of nodes. Any two nodes create an edge. Because it uses only vertices of edge as control positions sometime this is not enough. This option says how long should be an edge before it will be cutted on pieces. This process creates more positions to check and in some cases this make result better. But this also dramatically increase number of positions to check and make process of arrangement longer.
* '''Save length of the sheet''' - use this option if you prefer saving length of paper sheet. This is especially useful in case of roll paper format.
* '''Rotate workpiece''' - help avoid situations with workpieces that have convex shape. Those shapes can't be handled by basic algorithm. Rotation value sets angle value for single workpiece rotation around vertex point. For example: 180 means two rotations by 180 degree each. Numbers of rotations can be calculated from the expression <code>360/angle_value</code>. '''Warning.''' Increasing rotation number will increase time for searching best position for workpiece.
* '''Rules for choosing the next workpiece''' - there are three possible strategies selecting workpieces for arrangement: '''three groups: big, middle, small'''; '''two groups: big, small''' and descending area.
* '''Auto crop unused length''' - select if you need to crop unused length of paper sheet. Usually used in combination with option ''Unite pages''.
* '''Unite pages (if possible)''' - unite all pages in one if possible. Use it if you want to get one paper sheet from many smaller. The max length is restricted to max 32768 px.
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