VoxeLibre/mods/HUD/mcl_formspec/FORMSPEC_GUIDE.md

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# MineClone2 Formspec Guide
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**_This guide will teach you the rules for creating formspecs for the MineClone2 game._**
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Formspecs are an important part of game and mod development.
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First of all, MineClone2 aims to support ONLY last formspec version. Many utility functions will not work with formspec v1 or v2.
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The typical width of an 9 slots width inventory formspec is `0.375 + 9 + ((9-1) * 0.25) + 0.375 = 11.75`
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Margins are 0.375.
The labels color is `mcl_formspec.label_color`
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Space between 1st inventory line and the rest of inventory is 0.45
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Labels should have 0.375 space above if there is no other stuff above and 0.45 between content
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- 0.375 under
According to minetest modding book, table.concat is faster than string concatenation, so this method should be prefered (the code is also more clear)