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180 lines
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HTML
180 lines
8.3 KiB
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<title>Projection Algorithms</title>
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<h1>Projection Algorithms</h1>
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<p class="whs1">Projection algorithms allow
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to define the mesh of a geometrical object by the projection of another
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already meshed geometrical object. </p>
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<p class="whs1"> </p>
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<p class="whs1"><span style="font-weight: bold;"><B>Projection
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1D</B></span> algorithm permits to define the mesh of an edge by the projection
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of another already meshed edge.</p>
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<p class="whs1">To apply this algorithm
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select the edge to be meshed (indicated in the field <span style="font-weight: bold;"><B>Geometry</B></span>
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of<span style="font-weight: bold;"><B> Create mesh</B></span> dialog box), <span
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style="font-weight: bold;"><B>Projection 1D</B></span> in the list of 1D algorithms
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and click the <img src="image122.gif" width="30px" height="29px" border="0" class="img_whs2"> button. The following dialog box will appear:
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</p>
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<p class="whs3"><img src="pics/projection_1d.png" x-maintain-ratio="TRUE" width="270px" height="285px" border="0" class="img_whs4"></p>
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<p>In this menu you can define the <span style="font-weight: bold;"><B>Name</B></span>
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of the algorithm, the algeady meshed source <span style="font-weight: bold;"><B>Edge</B></span>
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and the <span style="font-weight: bold;"><B>Mesh</B></span> (optional, use it
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if there are several different meshes on the same edge). It could also
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be necessary to define the orientation of edges, which is done by indicating
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the <span style="font-weight: bold;"><B>Source Vertex</B></span> being the first
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point of the Source Edge and the <span style="font-weight: bold;"><B>Target
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Vertex </B></span>being the first point of the created <span style="font-weight: bold;"><B>Edge.</B></span></p>
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<p><span style="font-weight: bold;"><B>Projection 2D</B></span> algorithm<span
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style="font-weight: bold;"> <B></B></span>permits to define the mesh of a face
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by the projection of another already meshed face. This algorithm works
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only if all edges of the<span style="font-weight: bold;"> <B></B></span>target
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face have been meshed as 1D Projections of the edges of the source face.</p>
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<p>To apply this algorithm select the face to be meshed (indicated in the
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field <span style="font-weight: bold;"><B>Geometry</B></span> of<span style="font-weight: bold;"><B>
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Create mesh</B></span> dialog box), <span style="font-weight: bold;"><B>Projection
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2D</B></span> in the list of 2D algorithms and click the <img src="image122.gif" width="30px" height="29px" border="0" class="img_whs5"> button.
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The following dialog box will appear: </p>
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<p class="whs3"><img src="pics/projection_2d.png" x-maintain-ratio="TRUE" width="280px" height="351px" border="0" class="img_whs6"></p>
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<p>In this menu you can define the <span style="font-weight: bold;"><B>Name</B></span>
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of the algorithm, the algeady meshed source <span style="font-weight: bold;"><B>Face</B></span>
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and the <span style="font-weight: bold;"><B>Mesh</B></span> (optional, use it
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if there are several different meshes on the same face). It could also
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be necessary to define the orientation of mesh on the face, which is done
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by indicating two <span style="font-weight: bold;"><B>Source Vertices, </B></span>which
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belong to the same edge of the<span style="font-weight: bold;"> <B></B></span>source
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face, and two<span style="font-weight: bold;"><B> Target Vertices,</B></span>
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which belong to the same edge of the created<span style="font-weight: bold;"><B>
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Face. </B></span></p>
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<p><span style="font-weight: bold;"><B>Projection 3D</B></span> algorithm permits
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to define the mesh of a shape by the projection of another already meshed
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shape. This
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algorithm works only if all faces and edges of the<span style="font-weight: bold;">
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<B></B></span>target face have been meshed as 1D Projections of the faces and
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edges of the source face. Another limitation is that this algorithm currently
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works only on boxes. </p>
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<p>To apply this algorithm select the solid to be meshed (indicated in
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the field <span style="font-weight: bold;"><B>Geometry</B></span> of<span style="font-weight: bold;"><B>
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Create mesh</B></span> dialog box), <span style="font-weight: bold;"><B>Projection
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3D</B></span> in the list of 3D algorithms and click the <img src="image122.gif" width="30px" height="29px" border="0" class="img_whs5"> button.
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The following dialog box will appear: </p>
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<p class="whs3"><img src="pics/projection_3d.png" x-maintain-ratio="TRUE" width="280px" height="351px" border="0" class="img_whs6"></p>
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<p class="whs7">In this menu you can define the <span style="font-weight: bold;"><B>Name</B></span>
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of the algorithm, the algeady meshed source <span style="font-weight: bold;"><B>3D
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shape</B></span> and the <span style="font-weight: bold;"><B>Mesh</B></span> (optional,
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use it if there are several different meshes on the same shape). It could
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also be necessary to define the orientation of mesh on the shape, which
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is done by indicating two <span style="font-weight: bold;"><B>Source Vertices,</B></span>
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which belong to the same edge of the<span style="font-weight: bold;">
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<B></B></span>source <span style="font-weight: bold;"><B>3D Shape,</B></span> and two<span
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style="font-weight: bold;"><B> Target Vertices,</B></span> which belong to the
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same edge of the<span style="font-weight: bold;"> <B></B></span>source <span
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style="font-weight: bold;"><B>3D Shape. </B></span></p>
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