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)
region sph sphere 0 0 0 10.0 region cell box 0 0 0 4 2 2
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.
The bin command must be used before defining a region.
This command can only be used for spatial simulations.