The openscad exporter generates the 3D model of the board in form of an openscad script.
The main entry point of the script is pcb_board(). All coordinates are in mm. The in x and y directions the 0;0 point of the board is the 0;0 point on screen in pcb-rnd, to make it easy to wrap the board in a translate() after measuring the coords of a point in pcb-rnd. The vertical origin is the middle of the board's FR4.
Supported features:
Subcircuit models are loaded from external files referenced from the subcircuit in the pcb-rnd board file. Model files are searched recursively under the footprint library search path.
The subcircuit (footprint instance) can have the following openscad related attributes, all optional:
| attrib | meaning |
|---|---|
| openscad=filename | file name of the .scad script (3d subcircuit model) |
| openscad-transformation=script | apply the specified transformation on the model instance |
| openscad-param=p1,p2,p3... | parameters to pass on to the model |
If the openscad attribute is not present, no 3d model is inserted.
If openscad-transformation is specified, it is inserted before the model call; it typically contains a transform() and/or a rotate() to modify the placement of the model. The 0;0;0 point of the placement is the origin of the subcircuit in pcb-rnd, on the surface of the board.
If openscad-param is specified, the module is called with this parameter list, else the model is called with empty parameter list.
A model file shall contain a single module, with "module" and the arbitrary module name in the same line, { in the following line. One instance of each model is copied into the output file so that the resulting openscad script has no external reference and is self-contained.