forked from lijiext/lammps
Updated doc/body.txt for body rounded/polygon and rounded/polyhedron
This commit is contained in:
Trung Nguyen
parent
5124c9e993
commit
c3a32dde12
|
|
@ -36,7 +36,7 @@ thus how they can be used to compute pairwise body/body or
|
|||
bond/non-body (point particle) interactions. More details of each
|
||||
style are described below.
|
||||
|
||||
More styles ma be added in the future. See "Section
|
||||
More styles may be added in the future. See "Section
|
||||
10.12"_Section_modify.html#mod_12 for details on how to add a new body
|
||||
style to the code.
|
||||
|
||||
|
|
@ -182,7 +182,7 @@ The {rounded/polygon} body style represents body particles as a 2d
|
|||
polygon with a variable number of N vertices. This style can only be
|
||||
used for 2d models; see the "boundary"_boundary.html command.
|
||||
|
||||
NOTE: include a diagram of a a rounded polygon body particle
|
||||
NOTE: include a diagram of a rounded polygon body particle
|
||||
|
||||
Special cases for N = 1 (spheres) and N = 2 (rods) are also included.
|
||||
One use of this body style is for 2d discrete element models, as
|
||||
|
|
@ -219,12 +219,11 @@ list 6 moments of inertia followed by the coordinates of the N
|
|||
vertices (x1 to zN) as 3N values (with z = 0.0 for each), followed by
|
||||
2N vertex indices corresponding to the end points of the N edges,
|
||||
followed by a single diameter value = the rounded diameter of the
|
||||
circle that surrounds each vertex. These floating-point values can be
|
||||
circle that surrounds each vertex. The diameter value can be different
|
||||
for each body particle. These floating-point values can be
|
||||
listed on as many lines as you wish; see the
|
||||
"read_data"_read_data.html command for more details.
|
||||
|
||||
NOTE: can the diameter value be different for each body particle?
|
||||
|
||||
The 6 moments of inertia (ixx,iyy,izz,ixy,ixz,iyz) should be the
|
||||
values consistent with the current orientation of the rigid body
|
||||
around its center of mass. The values are with respect to the
|
||||
|
|
@ -236,9 +235,9 @@ position of the particle is specified by the x,y,z values in the
|
|||
{Atoms} section of the data file.
|
||||
|
||||
For example, the following information would specify a square particle
|
||||
whose edge length is sqrt(2):
|
||||
|
||||
NOTE: oriented how?
|
||||
whose edge length is sqrt(2) and rounded diameter is 1.0 in length unit
|
||||
and initial orientation is determined from the 6 moments of inertia
|
||||
(ixx iyy izz ixy ixz iyz):
|
||||
|
||||
3 1 27
|
||||
4
|
||||
|
|
@ -268,13 +267,13 @@ polyhedron with a variable number of N vertices, E edges and F faces.
|
|||
This style can only be used for 3d models; see the
|
||||
"boundary"_boundary.html command.
|
||||
|
||||
NOTE: include a diagram of a a rounded polyhedron body particle
|
||||
NOTE: include a diagram of a rounded polyhedron body particle
|
||||
|
||||
NOTE: 2d objects can also be specified as a special case, e.g.
|
||||
for a triangle, N = 3, E = 3 and F = 1.
|
||||
|
||||
Special cases for N = 1 (spheres) and N = 2 (rods) are also valid.
|
||||
|
||||
NOTE: can 2d objects also be specified as a special case, e.g. a
|
||||
triangle?
|
||||
|
||||
This body style is for 3d discrete element models, as described in
|
||||
"Wang"_#Wang.
|
||||
|
||||
|
|
@ -316,8 +315,9 @@ edges (E) and number of faces (F). The floating point line(s) list 6
|
|||
moments of inertia followed by the coordinates of the N vertices (x1
|
||||
to zN) as 3N values, followed by 2N vertex indices corresponding to
|
||||
the end points of the E edges, then 4*F vertex indices defining F
|
||||
faces. The last value is the radius value = the rounded diameter of
|
||||
the sphere that surrounds each vertex. These floating-point values
|
||||
faces. The last value is the diameter value = the rounded diameter of
|
||||
the sphere that surrounds each vertex. The diameter value can be different
|
||||
for each body particle. These floating-point values
|
||||
can be listed on as many lines as you wish; see the
|
||||
"read_data"_read_data.html command for more details. Because the
|
||||
maxmimum vertices per face is hard-coded to be 4
|
||||
|
|
@ -325,10 +325,9 @@ maxmimum vertices per face is hard-coded to be 4
|
|||
split into triangles or quadrilaterals. For triangular faces, the
|
||||
last vertex index should be set to -1.
|
||||
|
||||
NOTE: is there some right-hand rule for the ordering of the 4 vertices
|
||||
within each face?
|
||||
|
||||
NOTE: can the diameter value be different for each body particle?
|
||||
The ordering of the 4 vertices within a face should follow
|
||||
the right-hand rule so that the normal vector of the face points
|
||||
outwards from the center of mass.
|
||||
|
||||
The 6 moments of inertia (ixx,iyy,izz,ixy,ixz,iyz) should be the
|
||||
values consistent with the current orientation of the rigid body
|
||||
|
|
@ -341,24 +340,40 @@ position of the particle is specified by the x,y,z values in the
|
|||
{Atoms} section of the data file.
|
||||
|
||||
For example, the following information would specify a cubic particle
|
||||
whose edge length is 1.0:
|
||||
whose edge length is 2.0 and rounded diameter is 0.5 in length unit
|
||||
and initial orientation is determined from the 6 moments of inertia
|
||||
(ixx iyy izz ixy ixz iyz):
|
||||
|
||||
NOTE: oriented how?
|
||||
|
||||
NOTE: fill in these values correctly
|
||||
|
||||
3 1 27
|
||||
4
|
||||
1 1 4 0 0 0
|
||||
-0.7071 -0.7071 0
|
||||
-0.7071 0.7071 0
|
||||
0.7071 0.7071 0
|
||||
0.7071 -0.7071 0
|
||||
1 3 79
|
||||
8 12 6
|
||||
0.667 0.667 0.667 0 0 0
|
||||
1 1 1
|
||||
1 -1 1
|
||||
-1 -1 1
|
||||
-1 1 1
|
||||
1 1 -1
|
||||
1 -1 -1
|
||||
-1 -1 -1
|
||||
-1 1 -1
|
||||
0 1
|
||||
1 2
|
||||
2 3
|
||||
3 0
|
||||
1.0 :pre
|
||||
4 5
|
||||
5 6
|
||||
6 7
|
||||
7 4
|
||||
0 4
|
||||
1 5
|
||||
2 6
|
||||
3 7
|
||||
0 1 2 3
|
||||
4 5 6 7
|
||||
0 1 5 4
|
||||
1 2 6 5
|
||||
2 3 7 6
|
||||
3 0 4 7
|
||||
0.5 :pre
|
||||
|
||||
:line
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue