:tocdepth: 3 .. _blockmethod: ======================= Build a model of blocks ======================= What is a model of blocks ? =========================== A block (or a hexahedron) is a volume defined by: - 8 vertices - 12 edges - 6 quadrangular faces A model of blocks is a set of blocks. And for each quadrangle of a model of blocks, this quadrangle is: - or a free face - or a face shared between 2 blocks How to find a model of blocks ? =============================== In this version of HEXABLOCK component, the user must find himself the model of blocks that is adapted for his geometry. .. _modelbloc: How to create a model of blocks ? ================================= When the user find the model of blocks necessary for his geometry to be meshed with hexahedra, HEXABLOCK component has a lot of tool to build this model of blocks: - basic functions: - create one hexahedron - create a hexahedra with 2, 3, 4 or 5 quadrangles - remove hexahedra - grid building: - cartesian grid - cylindrical grid - spherical grid - predefined model of blocks: - for cylinder - for pipe - for two intersected cylinders - for two intersected pipes - for hemisphere - for ring - powerfull functions: - prism quadrangles - join quadrangles - make hexahedra by revolution of quadrangles - cut an edge to slice hexahedra - replace an hexadron by a pattern - by transformation: - translation - rotation - scale - by symetry: - with a point - with a line - with a plane - by merging: - of two vertices - of two edges - of two quadrangles - by disconnection: - of two vertices - of two edges - of two quadrangles Example of simple model of blocks ================================= .. image:: _static/ex1.png :align: center .. centered:: An exemple of a model with 12 blocks