## GEOMETRY_ELLIPSOID

#### Geometries

*GEOMETRY_ELLIPSOID
"Optional title"
gid, csysid
$x$, $y$, $z$, $R_x$, $R_y$, $R_z$

### Parameter definition

Variable
Description
gid
Geometry identification number
csysid
Local coordinate system ID
default: global coordinate system is used
$x$, $y$, $z$
Center coordinate
$R_x$, $R_y$, $R_z$
Length of semi-axes

### Description

This command is used to define an ellipsoid geometry, with its center at ($x, y, z$) and with semi-axes lengths ($R_x, R_y, R_z$). A local coordinate system can be used to direct the ellipsoid in an arbitrary direction.

### Example

###### Ellipsoid filled with soil particles

En ellipsoid geometry (defined in a local coordinate system) is filled with discrete soil particles.

*UNIT_SYSTEM SI *PARAMETER xc = 0.4, "x-center" yc = 0.2, "y-center" zc = 0.5, "z-center" Rx = 0.1, "semi-axis x-direction" Ry = 0.2, "semi-axis y-direction" Rz = 0.1, "semi-axis z-direction" ang = 30.0, "angle" # *PARTICLE_DOMAIN 0, 0, 10000 0, 0, 0, 1, 1, 1 *PARTICLE_SOIL "soil" 1 DRY, 123 *GEOMETRY_ELLIPSOID 123, 22 0, 0, 0, [%Rx], [%Ry], [%Rz] *COORDINATE_SYSTEM_FIXED 22, [%xc], [%yc], [%zc] [cos(%ang)], [sin(%ang)], 0, [-sin(%ang)], [cos(%ang)], 0 *END