3 \page prism_3d_algo_page 3D extrusion meshing algorithm
5 3D extrusion algorithm can be used for meshing prisms, i.e. <b>3D Shapes</b>
6 defined by two opposing faces having the same number of vertices and
7 edges and meshed using, for example, the \ref projection_algos_page
8 "2D Projection" algorithm. These two faces should be connected by
9 quadrangle "side" faces.
11 The opposing faces can be meshed with either quadrangles or triangles,
12 while the side faces should be meshed with quadrangles only.
14 \image html image157.gif "Prism with 3D extrusion meshing".
16 As you can see, the <b>3D extrusion</b> algorithm permits to build and to
17 have in the same 3D mesh such elements as hexahedrons, prisms and
20 \note This algorithm works correctly only if the opposing faces have
21 the same (or similar) meshing topography. Otherwise, 3D extrusion
22 algorithm can fail to build mesh volumes.
