Brlcad/How to mged/primitive
< Brlcad | How to mged
New primitives can be created and inserted into the database using the in command. Note that the database must be opened before insertion can take place:
Types of primitives
[edit | edit source]Arbitrary polyhedron
[edit | edit source]- arb8 - arbitrary polyhedron with 8 vertices
- arb7 - arbitrary polyhedron with 7 vertices
- arb6 - arbitrary polyhedron with 6 vertices
- arb5 - arbitrary polyhedron with 5 vertices
- arb4 - arbitrary polyhedron with 4 vertices
- arbn - arbitrary polyhedron with n vertices
- box - arbitrary polyhedron (vertex and three vectors)
- rpp - rectangular parallelepiped (cuboid)
Ellipsoid
[edit | edit source]- ell - ellipsoid (centre and three semi-axes)
- ell1 - ellipsoid (centre, one semi-axes, radius of revolution)
- ellg - ellipsoid (foci and chord length)
- sph - spherical ellipsoid
Truncated general cone
[edit | edit source]- rec - truncated general cone (right elliptical cylinder)
- tec - truncated general cone (top radii scaled from base radii)
- tgc - truncated general cone (general form)
- trc - truncated general cone (truncated right circular cone)
- rcc - truncated general cone (right circular cylinder)
Other primitives
[edit | edit source]- ars - arbitrary faceted solid
- bot - bag of triangles
- ebm - extruded bitmap
- dsp - displacement map
- half - half space
- hf - height field (deprecated)
- pipe
- raw - arbitrary polyhedron (right angle wedge)
- tor - torus
- vol - voxels
Cuboid
[edit | edit source]The rpp (rectangular parallelepiped) primitive to is used to create a cuboid using an area defined by the parameters xmin,xmax,ymin,ymax,zmin,zmax.
# Insert a 2 x 3 x 4 cuboid named cuboid1.s into the database in cuboid1.s rpp 0 2 0 3 0 4
Sphere
[edit | edit source]# Insert a sphere of radius 3 named ball.s into the database in ball.s sph 0 0 0 3