This command is deprecrated, see CREATEPTS.

Builds a sphere by generating coordinates of points and also modifies zoning by ratio-zoning point distributions. See the rz command for more details. The itype flag defines what type of sphere will be generated.

Use connect to generate tet or triangle connectivity from the point distribution.


rzs / itype / nr,npt,xirad,xorad / xcen,ycen,zcen / iz / irat,rz

Types for sphere itype:

  • 1 generates a sphere by gridding the faces of a cube and then projecting the vertices onto a sphere. The number of nodes per shell is of the form 6*i**2.

  • 2 generates a sphere by subdividing an icosahedron placed on the surface of a sphere. Icosahedral gridding is made up of 10 diamonds per shell. Each diamond is made up of n**2 nodes (where n must be of the form 2**i+1). There are 2 nodes (the poles of the sphere) at which 5 diamonds meet and 10 nodes where 3 diamonds meet; hence there are a minimum of 12 nodes per shell. The number of nodes per shell can be 12, 42, 162, 642,…etc.

  • 8 generates a hexahedral icosahedron grid. This option distributes points and generates the grid connectivity data structures. This option does not require a connect command.

  • diamond generates the points for one diamond of the icosahedron.


nr is the number of radial shells

npt is the upper limit of the number of points in a shell, the number of points generated will be less than or equal to this number.

xirad , xorad are the inner and outer radii of the sphere. For itype =8 reverse inner and outer radii.

xcen, ycen, zcen are the coordinates of the center of the sphere

iz  if =0 then mins and maxs are used as cell centers, if =1 then mins and maxs are used as cell vertices

irat is ratio zoning switch (0=off,1=on)

rz is ratio zoning value - distance is multiplied by the value for each subsequent point.