**REGNPTS**

Generates points in a region previously defined by the region
command. The points are generated by shooting rays through a user
specified set of points from an origin point, line, or plane and
finding the intersection of each ray with the surfaces that define
the region. The point distribution is determined by the data in
ptdist. If ptdist is integer, then that many points are evenly
distributed along the ray in the region. If ptdist is real, then
points are distributed at that distance along the ray, up to a
maximum of maxpenetr points along the ray (in addition to any
interface points that may be created). note: If the ray encounters a
region more than once, multiple sets of points are layed down.
Points are distributed on the regionís material interfaces and
external boundaries if the region definition includes the interfaces
or boundaries – usually **ge** or **le** means that the region
includes the interface or boundary.

Only surface intersection points are created if ptdist is
**inside**, **in**, **out**, **outside**, or**both.** In this case,
surface points are created regardless of region ownership of the
interface or boundary surface – if a ray encounters a region more
than once, the appropriate surface intersection point(s) is
generated for each encounter.

If another region intrudes upon the regnpts region so that the regpts region is divided into more than one piece, points that fall inside the intruding region are not distributed.

The variables irratio and rrz determine ratio zoning when ptdist is an integer. Ratio zoning is on when irratio is 1; the point distribution is adjusted so that the ratio between successive pairs of points is rrz. When irratio is 3, ratio zoning is calculated on the longest ray; then this length distribution is applied to all rays.

See the description of the command **surface** for a discussion of
point distributions with respect to sheet surfaces.

**FORMAT:**

**regnpts**/region name/ptdist/ifirst,ilast,istride/geom/

ray origin/irratio,rrz,maxpenetr

**regnpts**/region name/ptdist**/pset**,**get**,setname/geom/ray
origin /irratio,rrz/maxpenetr

Where ifirst,ilast,istride or **pset**,**get**,setname define the set
of points to shoot rays through.

SPECIFICALLY FOR ALLOWABLE GEOMETRIC TYPES:

**regnpts**/region name/ptdist/ifirst,ilast,istride**/xyz**

/x1,y1,z1/x2,y2,z2/x3,y3,z3/irratio,rrz/maxpenetr

Where points 1, 2, 3 define the plane to shoot rays from that are normal to the plane.

**regnpts**/region name/ptdist/ifirst,ilast,istride/
**rtz**/x1,y1,z1/x2,y2,z2/irratio,rrz/

Where points 1, 2, define the line from which to shoot perpendicular rays

**regnpts**/region name/ptdist/ifirst,ilast,istride/

**rtp**/xcen,ycen,zcen/irratio,rrz,maxpenetr

Where xcen,ycen,zcen define a point from which to shoot rays .

**regnpts**/region
name/ptdist/ifirst,ilast,istride**/points**/iffirst,iflast,ifstride/irratio,rrz/
maxpenetr

Where the 2 point sets have the same length and rays are constructed between pairs of elements, one from each point set.