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92 lines
4.1 KiB
Plaintext
92 lines
4.1 KiB
Plaintext
/*!
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\page projection_algos_page Projection Algorithms
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\n Projection algorithms allow to define the mesh of a geometrical
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object by the projection of another already meshed geometrical object.
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<b>Projection 1D</b> algorithm allows to define the mesh of an edge
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(or group of edges)
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by the projection of another already meshed edge (or group of edges).
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\n To apply this algorithm select the edge to be meshed (indicated in
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the field \b Geometry of <b>Create mesh</b> dialog box),
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<b>Projection1D</b> in the list of 1D algorithms and click the
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<em>"Add Hypothesis"</em> button.
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The following dialog box will appear:
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\image html projection_1d.png
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In this menu you can define the \b Name of the algorithm, the already
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meshed source \b Edge and the \b Mesh (It can be omitted only when
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projecting a submesh on another one from the same global Mesh).
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It could also be necessary to define the orientation of edges,
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which is done by indicating the <b>Source Vertex</b> being the first point
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of the Source Edge and the <b>Target Vertex</b> being the first point of
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the created \b Edge.
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<br>
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For a group of edges, <b>Source</b> and <b>Target</b> vertices should be
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shared by one edge of the group. If <b>Source</b> and <b>Target</b>
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vertices are specified, the elements of the group must be ajacent.
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The source and target groups must contain equal number of edges
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and they must form topologically equal structures.
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\n <b>Projection 2D</b> algorithm allows to define the mesh of a face
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(or group of faces) by the
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projection of another already meshed face (or group of faces). This
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algorithm works only
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if all edges of the target face have been meshed as 1D Projections of
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the edges of the source face.
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To apply this algorithm select the face to be meshed (indicated in the
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field \b Geometry of <b>Create mesh</b> dialog box), <b>Projection
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2D</b> in the list
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of 2D algorithms and click the <em>"Add Hypothesis"</em> button. The
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following dialog box will appear:
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\image html projection_2d.png
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In this menu you can define the \b Name of the algorithm, the already
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meshed source \b Face and the \b Mesh (It can be omitted only when
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projecting a submesh on another one from the same global Mesh).
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It could also be necessary to define the orientation of mesh on the
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face, which is done by indicating two <b>Source Vertices</b>, which
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belong to the same edge of the source face, and two <b>Target
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Vertices</b>, which belong to the same edge of the created \b Face.
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For groups of face, they must contain equal number of faces
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and they must form topologically equal structures.
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\n <b>Projection 1D-2D</b> algorithm differs from <b>Projection 2D</b>
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algorithm in one point, namely it generates mesh segments on edges of
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the face according to the projected 2D elements; thus it does not
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require that edges to be meshed by any other 1D algorithm; moreover it
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does not allow to mesh edges of the face using another algorithm via
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definition of sub-meshes.
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\n <b>Projection 3D</b> algorithm allows to define the mesh of a shape by
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the projection of another already meshed shape. This algorithm works
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only if all faces and edges of the target shape have been meshed as 1D-2D
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Projections of the faces and edges of the source shape. Another
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limitation is that this algorithm currently works only on boxes.
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To apply this algorithm select the solid to be meshed (indicated in
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the field \b Geometry of <b>Create mesh</b> dialog box), <b>Projection
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3D</b> in the list of 3D algorithms and click the button. The
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following dialog box will appear:
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\image html projection_3d.png
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In this menu you can define the \b Name of the algorithm, the already
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meshed source <b>3D shape</b> and the \b Mesh (It can be omitted only when
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projecting a submesh on another one from the same global Mesh).
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It could also be necessary to define the orientation of mesh on the shape, which is
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done by indicating two <b>Source Vertices</b>, which belong to the same edge
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of the source <b>3D Shape</b>, and two <b>Target Vertices</b>, which belong to the
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same edge of the source <b>3D Shape</b>.
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<br><b>See Also</b> a sample TUI Script of a
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\ref tui_projection "Projection Algorithms".
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*/
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