Syntax:
region ID style args
sphere args = x y z r
x,y,z = center of sphere (microns)
r = radius of sphere (microns)
box args = xlo ylo zlo xhi yhi zhi
xlo,ylo,zlo = lower left corner of box (microns)
xhi,yhi,zhi = upper right corner of box (microns)
plane args = x y z nx ny nz
x,y,z = point on plane (microns)
nx,ny,nz = vector pointing in normal direction to plane
cylinder args = dim c1 c2 r
dim = x or y or z
c1,c2 = coords of axis in other 2 dimensions (yz,xz,xy) (microns)
r = radius of cylinder (microns)
Examples:
region sph sphere 0 0 0 10.0 region cell box 0 0 0 4 2 2
Description:
Define a simple geometric region as a surface. Similar to triangulated surfaces, the region surface can be used as a boundary for 3d particles or as a surface on which 2d particles are located and move.
The ID of a region can contain alphanumeric characters and underscores and dashes.
The plane style defines an infinite plane which should be axis-aligned if the simulation box is periodic. The cylinder style defines an infinite open-ended axis-aligned cylinder.
Restrictions:
The bin command must be used before defining a region.
This command can only be used for spatial simulations.
Related commands:
Default: none