Implemented door placement

Boolean operations in 3D are quite heavy. But fortunately, each wall can be represented as two 2D planes.

To determine which 2D shape I need to cut from the mentioned planes, I add a special plane in Blender with “Cutout” name. This is what The Sims series do.

And for all doors located on a wall I triangulate combined vertices using earcutr. The library API doesn’t fit well with Bevy, but it does the trick.

@projectharmonia

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