Filter
Top Products
corners. This primitive is especially useful with plane wave
illumination, where we want PMLs only on the front and back faces
of the region. The wide face of the object must touch one of the
faces of the simulation domain. The PML absorption directions will
be the outward normals for the face, outward-directed face
diagonals for the edges, and outward-directed body diagonals for
the corners. If for some reason you call this with an ordinary
material, it just adds a regular block.
Parameters: mattype xlo xhi ylo yhi zlo zhi
CURVE Adds a curved object whose path is expressed by a user-defined
planar curve, (u(s), v(s)), and whose outline is swept out by the
region f(q,r) > 0 as the parameter s advances from slo to shi.
Variable q is the normal to the plane, and r is parallel to q × (du/ds,
dv/ds). This statement can be used to make very general curved
objects of variable cross-section. Due to the uniform rectangular
grid employed by FIDO/TEMPEST, curved objects will look somewhat
different depending on the direction of their axes at any given
place. POEMS attempts to minimize this effect.
Parameters: mattype slo shi perp hfunc vfunc
Not implemented in this release.
3DCURVE Like CURVE, but the axial curve is allowed to be nonplanar. This
statement is more complicated to use, due to the noncommuting
property of 3-D rotations—in specifying the functions u, v, w, it’s
easy to get mixed up by the way they rotate around.
Parameters:
Not implemented in this release.
CYLINDER Adds an object whose axis is a straight line, but whose outline is an
arbitrary function of the perpendicular coordinate.
Parameters: mattype axis lo hi maxradius insidefunc
Not implemented in this release.
20