CREATEPTS/interp/npoint/i1 i2 i3/j1 j2 j3/cmo_new

This command adds points to a mesh object. It creates points by linear interpolation of coordinates between two point sets. For some special cases, it will also produce element connectivity between the point sets.

The combinations of input and output are:

Source Element Type	Result Element Type
point	point (no connectivity)
line	quad
tri	prism
quad	hex
hybrid (quad,tri)	hybrid (hex, prism)

FORMAT: createpts/interp/npoint/i1,i2,i3/j1,j2,j3/cmo_new

npoint  specifies the number of points to create between the specified point sets.
i1,i2,i3 specifies the point set coordinate interpolation starts FROM.
j1,j2,j3 specifies the point set coordinate interpolation goes TO.
cmo_new  is the name of the mesh object the result goes into. The source mesh object is the current mesh object.
i1,i2,i3 and j1,j2,j3 can specify either a)start, stop, stride or b) 1 0 0  for everything or c)pset get pset_name

It is up to the user to insure that the number of nodes specified by i1,i2,i3 is equal to the number of nodes specified by
j1,j2,j3 .

If the 1, 0, 0 format is used the code will use:
i1 = 1, i2 = nnodes/2, i3 = 1, j1 = (nnodes/2)+1, j2 = nnodes, j3 = 1

  EXAMPLES:

Example 1
Create a point distribution between the two point sets created by the createpts/line commands

createpts/line/10///-1.,0.,0.,1.,0.,0.
createpts/line/10///0.,-1.,1.,0.,1.,1.
createpts/ interp / 10 / 1 0 0 / 1 0 0 / cmo_pts

Example 2
Create a hex mesh by linear interpolation between two quad surfaces. It is up to the user to be sure that the ordering of the quads are as intended. The first node of first quad surface (cmo1) is interpolated to the first node of the second quad surface (cmo2)

cmo create cmo1///quad
quadxy 5 5/ 0. 0. 0. / 20. 0. 0./20. 20. 0. / 0. 20. 0.
createpts/brick/xyz/5,5,1/1,0,0/connect
cmo create cmo2///quad
quadxy 5 5/ 0. 0. 10. / 20. 0. 25./20. 20. 15. / 0. 20. 35.
createpts/brick/xyz/5,5,1/1,0,0/connect
addmesh / merge / cmo3 / cmo1 / cmo2
cmo / select / cmo3
createpts / interp / 6 / 1 0 0 / 1 0 0 / cmo_hex

Example 3
Starting with cmo3 from Example 2, this will interpolate from node 1 of cmo3 to node 49 of cmo3 and interpolate from node 2 of cmo3 to node 50 of cmo3.

createpts / interp / 20 / 1 2 1 / 49 50 1 / cmo_pts