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68 lines
2.9 KiB
Plaintext
68 lines
2.9 KiB
Plaintext
/*!
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\page about_meshes_page About meshes
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\n \b MESH represents a discretization of a geometrical CAD model into
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a set of entities with a simple topology.
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It is possible to \subpage constructing_meshes_page "construct meshes"
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on the basis of geometrical shapes produced in the GEOM module.
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Construction of \subpage constructing_submeshes_page "sub-meshes"
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allows to mesh parts of the geometrical object, for example a face,
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with different meshing parameters or using another meshing algorithm
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than other parts.
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3D mesh can be generated basing on a 2D closed mesh.
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Several created meshes can be \subpage building_compounds_page "combined into another mesh".
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The whole mesh or its part can be \subpage copy_mesh_page "copied" into another mesh.
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Meshing parameters of meshes and sub-meshes can be
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\subpage editing_meshes_page "edited", then only the mesh part
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depending on the changed parameters will be re-computed.
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Meshes can be edited using the MESH functions destined for
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\ref modifying_meshes_page "modification" of generated meshes.
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Meshes are stored in DAT, MED, UNV, STL, CGNS, GMF and SAUVE formats and can be
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\subpage importing_exporting_meshes_page "imported from and exported to"
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the file in these formats.
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The \b topology of a mesh is described by the relationships between its
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entities including:
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<ul>
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<li>\b Node — 0D object of a mesh presented by a point with coordinates (x, y, z).</li>
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<li>\b 0D element — element of a mesh defined by one node.</li>
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<li>\b Edge — 1D element of a mesh defined by two nodes.</li>
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<li>\b Face — 2D element of a mesh defined by three or four edges (closed contour).</li>
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<li>\b Volume — 3D element of a mesh defined by several faces.</li>
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<li>\b Ball element — discrete element of a mesh defined by a node and a diameter.</li>
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</ul>
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These entities are
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considered as topological entities and they don't
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imply any geometric representation. Only \b Nodes reference geometric
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representations of points with definite coordinates. The node entity
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contains additional information about its position in the space
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and its relations with the meshed CAD model. Its position could be
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described in the following way:
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<ul>
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<li><b>3D position</b>. It characterizes the position of a node in a
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solid geometry and is defined by three coordinates x,y and z and a
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reference to the solid geometrical entity. </li>
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<li><b>Surface position</b>. It characterizes the position of a node on a
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geometric surface and is defined by the u,v position in the parametric
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space of the corresponding surface.</li>
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<li><b>Line position</b>. It characterizes the position of a node on a
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geometric curve and is defined by the u parameter and the
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corresponding curve.</li>
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<li><b>Vertex position</b>. It characterizes the position of a node on a
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geometric point of the meshed CAD model and is defined by the x,y,z
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coordinates of the corresponding vertex.</li>
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</ul>
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*/
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