next up previous
Next: /Parallelepiped Up: Formats of 3D primitives Previous: /Column

/Cons

/Cons describes a tube or its segment in azimuthal angle with varying minimum (inside) and maximum (outside) radii. It is a cone (segment) with its upper part cut away. Its height extends along the z axis. The top facet is on plane z = +dz, and the bottom facet on plane z = -dz. Centers of the top and bottom facets are (0, 0, +dz) and (0, 0, -dz), respectively. /Cons corresponds to class G4Cons of GEANT4.

Format /Cons rmin1 rmax1 rmin2 rmax2 dz sphi dphi
rmin1 minimum (inside) radius at z = -dz
rmax1 maximum (outside) radius at z = -dz
rmin2 minimum (inside) radius at z = +dz
rmax2 maximum (outside) radius at z = +dz
dz half height along the z axis
sphi starting azimuthal angle,[-2*PI, 2*PI]
dphi extension of azimuthal angle, dphi = [0,2*PI],
  sphi + dphi = [-2*PI,2*PI]]


Satoshi Tanaka
4/9/1998