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Surfaces and Solid Bodies
Moritz supports all MCNP surfaces, MCNP macrobodies, and Morse, Sabrina, and ITS Accept solid bodies. All types of surfaces can be created by entering coefficients in the Surface dialog. The simpler surfaces-planes (except the general plane P), spheres, cylinders, and cones-can also be defined and modified interactively with the mouse.
New Surface Types. Several new surface types that can be defined interactively (and also on the dialog) have been introduced. Planes parallel to an axis-PXY, PXZ, and PYZ-are subtypes of the general plane. A PXY plane, for example, is parallel to the Z axis. Ellipsoids (E) and Elliptical cylinders (EC) are specific types of the special quadratic (SQ) surface. Their subtypes are analogous to the sphere and cylinder subtypes: E is a general ellipsoid, EO is an ellipsoid centered at (0, 0, 0), and similarly for EX, EY, EZ, ECX, ECY, ECZ, EC/X, EC/Y, and EC/Z. The axes of the ellipsoids are parallel to the coordinate axes. The Tabular Surface of Revolution (TABSF) is a composite solid body.
Solid Bodies. All types of bodies may be created or modified on the Body dialog. Interactive creation and modification is available for Right Parallelepipeds (RPPs), for Right Circular Cylinders (RCC), Right Elliptical Cylinders (REC), and Truncated Right Cones (TRC) in which the height vector is parallel to a coordinate direction, and for Boxes (BOX) and Wedges (WED) in which the 3rd vector (the vector perpendicular to the triangular face of the WED) is parallel to a coordinate direction. Specific subtypes are used for the aligned instances of the latter 5 body types, such as BOX/X. The subtypes of the RCC, REC, and TRC bodies follow the naming conventions of the MCNP cylinders and cones. For example, an RCCX is centered on and parallel to the X axis and an RCC/X is parallel to the X axis. Interactive creation, but not modification at present, is available for Right Hexagonal Prisms (RHP). Spheres, Ellipsoids, and Tori may be created as bodies (SPH, ELL, and TOR) rather than surfaces. Several interactive methods are available for defining RPPs and aligned RCCs, TRCs, and RECs from existing surfaces.
MCNP torus surfaces are restricted to having their major axis parallel to a coordinate axis. This restriction does not apply to the TOR solid body. When a transformation is applied to a torus surface, that object is changed to a TOR body if necessary.
An option is available to automatically define a cell inside of newly created bodies.
Surface/Body Editing. Any existing surface or body can be modified by changing its coefficients in the Surface dialog or Body dialog. Surfaces and bodies that can be drawn interactively can also be modified with the mouse once created. Interactively, one can move and resize surfaces and bodies if such an action is appropriate-for example, planes cannot be resized and SO (centered at the origin) spheres cannot be moved. Any cells affected by the modification are redrawn in both the 2D and 3D views. Existing objects (of the interactive types) can be copied and pasted. Circular surfaces and bodies can also be pasted concentrically with the original surface.
Duplicate Surfaces. If a surface is identical to an existing surface, it is deleted and any references to it in cell descriptions is replaced by a reference to an existing surface.
Surface to Solid Body Conversion. Moritz has interactive methods for defining bodies from surfaces and an automatic conversion of cells described in terms of surfaces to cells defined by solid bodies.
 White Rock Science http://www.whiterockscience.com/wrs.html 505 672 1105 |
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