de37e94f32
Fixes #13621. Currently the legacy DXF importer creates a main group with the DXF name if a DXF is imported into an existing FreeCAD document. For each DXF layer it then creates a sub-group (or Draft Layer) inside that main group. Objects are nested in the sub-groups (or Draft Layers). This does not make sense for Draft Layers as they should be nested in the LayerContainer, which should be in the root of the FreeCAD document. Both for Draft Layers and sub-groups there is the issue that if mutliple DXF files are imported in the same FreeCAD document, exising Draft Layers and sub-groups are not taken into account. For each DXF a new "0" group/layer is created (with a Label that is not "0" and therefore not recognized), and if there are objects on that layer a new group/layer is created for each object (labelled "0001", "0002", "0003", etc). To solve this the main group with the DXF name is no longer created in the revised code and the layers variable is initialized with the groups/layers that already exist in the FreeCAD document. Additionally the formatObject function should not format objects that are in Draft Layers. Its action conflicts with the layer mechanism resulting in the last imported object having an incorrect color.
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Overview
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Freedom to build what you want FreeCAD is an open-source parametric 3D modeler made primarily to design real-life objects of any size. Parametric modeling allows you to easily modify your design by going back into your model history to change its parameters.
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Create 3D from 2D and back FreeCAD lets you to sketch geometry constrained 2D shapes and use them as a base to build other objects. It contains many components to adjust dimensions or extract design details from 3D models to create high quality production-ready drawings.
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Underlying technology
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