59 lines
2.0 KiB
Plaintext
Executable File
59 lines
2.0 KiB
Plaintext
Executable File
.. _rzs :
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> **_RZS_**
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Builds a sphere by generating coordinates of points and also modifies zoning
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by ratio-zoning point distributions. See the** rz **command for more details.
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The** **itype flag defines what type of sphere will be generated.
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itype=1 generates a sphere by gridding the faces of a cube and then projecting
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the vertices onto a sphere. The number of nodes per shell is of the form
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6*i**2.
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itype=2 generates a sphere by subdividing an icosahedron placed on the surface
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of a sphere.
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Icosahedralm gridding is made up of 10 diamonds per shell. Each diamond is
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made up of n**2 nodes (where n must be of the form 2**i+1). There are 2 nodes
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(the poles of the sphere) at which 5 diamonds meet and 10 nodes where 3
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diamonds meet; hence there are a minimum of 12 nodes per shell. The number of
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nodes per shell can be 12, 42, 162, 642,...
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itype= 1 or 2 or diamond distributes points only, call **connect** to generate
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connectivity information.
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nr is the number of radial shells
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npt is the upper limit of the number of points in a shell
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itype=8 generates a hexahedral icosahedron grid. This option distributes
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points and generates the grid connectivity data structures.
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xirad,xorad are the inner and outer radii of the sphere. For itype=8 reverse
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inner and outer radii.
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xcen,ycen,zcen are the coordinates of the center of the sphere
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iz _place_holder; if =0 then mins and maxs are used as cell centers
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 _place_holder; _place_holder; _place_holder; _place_holder;&n
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bsp_place_holder; _place_holder; _place_holder; _place_holder; if
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=1 then mins and maxs are used as cell vertices
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irat is ratio zoning switch (0=off,1=on)
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rz is ratio zoning value - distance is multiplied by the value for each
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subsequent point.
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itype = diamond generates the points for one diamond of the icosahedron
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 _place_holder; FORMAT:
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**rzs/**itype/nr,npt,xirad,xorad/xcen,ycen,zcen/iz/irat,rz/
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 _place_holder; EXAMPLES: **rzs**/8/5/162/1.0,0.5/0.,0.,0./1,0,0.0/
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rzs/2/5/162/0.5,1.0/0.,0.,0./1,0,0.0/
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rzs/diamond/5/162/1,.5/0,0,0/1,0,0/
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