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Modeling with Layers
Input of Graphical Objects With Background Layers
|In contrast to the direct DXF import of a structure, providing the complete model already converted into nodes, lines, members and surfaces, layers represent some sort of transparent sheets for specific structural modeling. You can use any number of layers in a structure. Furthermore, it is possible to import background layers to RFEM, to adjust them and to create new ones.|
Import of layer
Before you start the import, it is necessary to check the conversion settings: Normally, in CAD programs, the global Z-axis is directed upwards. In RFEM, however, the Z-axis is defined downwards. Therefore, you can change the direction of the Z-axis for the import. It is also possible to adjust the units of length. You can also specify an offset in order to shift the layer in RFEM. Moreover, when you import DXF files, you can select a particular layer from the layers list.
Use of layer
The imported layer appears in gray and is underlain in the background of the RFEM workspace. The gray line model allows for the input of nodes, lines and members. The individual layer points can be picked by the object snap. Each background layer can be edited by the functions Move, Rotate, Mirror or Stretch.
Creation of layer
The DXF file format only transfers general information concerning lines used in the model. For each cross-section one layer is used. Nodal supports, loads etc. cannot be taken over. For the export of an RFEM structure as line model several setting options are available.