brep — This command does a boundary representation which represents the solid geometry by describing the topology and corresponding geometry.
If obj is not a brep object, then
brep attempts to convert it to a brep object.
If brepname is given, then
brep defaults to
obj_brep; if --no-evaluation is
given, then brep attempts to convert a
combination to an unevaluated BREP named
suffix (again defaulting to
obj_brep).
Otherwise, the behavior of brep is determined by which of these subcommands is specified:
info
Return count information (surfaces, curves, etc.) for a BREP.
info C [ index |
index-index
]
Return information for a specific BREP '3D curve'.
info S [ index |
index-index
]
Return information for a specific BREP 'surface'.
info F [ index |
index-index
]
Return information for a specific BREP 'face'.
info T [ index |
index-index
]
Return information for a specific BREP 'trim'.
info E [ index |
index-index
]
Return information for a specific BREP 'edge'.
info TB [ index |
index-index
]
Return information for a specific BREP 'piecewise bezier trim'.
info SB [ index |
index-index
]
Return information for a specific BREP 'piecewise bezier surface'.
plot S [ index |
index-index
]
Plot a specific BREP 'surface'.
plot Suv { index |
index-index
} {u} {v}
Plot a specific BREP 'surface' 3d point at specified uv.
plot UV { index |
index-index
} {u1} {u2} {v1} {v2}
Plot a specific BREP 'surface' 3d bounds at specified uv bounds.
plot F [ index |
index-index
]
Plot a specific BREP 'face'.
plot I [ index |
index-index
]
Plot a specific BREP 'isosurface'.
plot SN [ index |
index-index
]
Plot a specific BREP 'surface normal'.
plot KN [ index |
index-index
]
Plot a specific BREP 'surface knot'.
plot F2d [ index |
index-index
]
Plot a specific BREP 'face in 2d'.
plot SBB [ index |
index-index
]
Plot a specific BREP 'surfaceleafs'.
plot SBB2d [ index |
index-index
]
Plot a specific BREP 'surfaceleafs in 2d'.
plot TD [ index |
index-index
]
Plot a specific BREP 'trim direction'.
plot T [ index |
index-index
]
Plot a specific BREP 'trim'.
plot T2d [ index |
index-index
]
Plot a specific BREP 'trim in 2d'.
plot TBB [ index |
index-index
]
Plot a specific BREP 'trimleafs'.
plot TBB2d [ index |
index-index
]
Plot a specific BREP 'trimleafs in 2d'.
plot E [ index |
index-index
]
Plot a specific BREP 'edge3d'.
plot SCV [ index |
index-index
]
Plot a specific BREP 'nurbs control net'.
flip
Flip all faces in the BREP (turns it 'inside out').
translate {SCV} {index} {i} {j} {dx} {dy} {dz}
Translate a surface control vertex
intersect {obj2} {i} {j} [ PP | PC | PS | CC | CS | SS ]
Visualize intersecting two BREP objects. The last argument specifies what portions of each to intersect; if it is not specified, it defaults to SS:
Intersect a point from the first object with a point from the second.
Intersect a point from the first object with a curve from the second.
Intersect a point from the first object with a surface from the second.
Intersect a curve from the first object with a curve from of the second.
Intersect a curve from the first object with a surface from the second
Intersect a surface from the first object with a surface from the second.
u {obj2} {output}
Take the union of obj and
obj2, storing the result in
output.
i {obj2} {output}
Take the intersection of obj
and obj2, storing the result in
output.
- {obj2} {output}
Take the difference of obj and
obj2, storing the result in
output.
x {obj2} {output}
Take the exclusive or of obj
and obj2, storing the result in
output.
csg
Take the specified B-Rep and attempt to generate a CSG implicit boolean tree that will define the same solid shape.
Example 1. Info
mged> brep obj.randomobj infoThis outputs general information about obj.randomobj, including counts of various entity types such as surfaces, curves, vertices, etc.
mged> brep obj.randomobj info F 2Output info about the 2nd face of the BREP object obj.randomobj.
Example 2. Plot
mged> brep obj.randomobj plot S 1-3This plots the 1st through 3rd surfaces of obj.randomobj in the graphics display window.
Example 3. Intersect
mged> brep obj.randomobj intersect sph2.randomobj 2 4This displays the intersection of obj.randomobj's 2nd surface with sph2.randomobj's 4th surface.
mged> brep obj.randomobj intersect sph2.randomobj 3 2 PCThis displays the intersection of obj.randomobj's 3rd point with sph2.randomobj's 2nd curve.
Reports of bugs or problems should be submitted via electronic
mail to <devs@brlcad.org>