http://www.geometrictools.com/LibPhysics/RigidBody/RigidBody.html
in surfaceInertia utility. Allows calculation of shell or solid
properties of a triSurface, with optionally specified volumetric or
surface density. Default behaviour is to calculate inertia around
centre of mass, with option to specify reference point.
Various test surfaces supplied and tested against analytical results.
- Previously had just 'Warning' instead of '::Foam::Warning', which
meant that an identically named class method would inadvertently be
used - resulting in a compile failure.
When faceZones are present one has to decide whether to have zone faces
only on the edge of cellZones or also freestanding.
The setting for minMedialAxisAngle was corrected since the calculation
has also been corrected.
Read only support:
.bdf, .nas - NASTRAN format. Handles both CBEAM and CROD as lines.
CROD is what Hypermesh happens to output.
Write only support:
.vtk - VTK legacy format in ASCII
Read/write support:
.eMesh - native format, which is simply a list of points, edges
with an additional IOobject header that lets them be moved about
easily to use as a featureEdgeMesh.
.inp - STAR-CD inp/cel/vrt combination
IOobject header)
.obj - Alias waverfront format
Radically simplify surfaceFeatureConvert by using the new edgeMesh
functionality.
- resize with factor 2 as per DynamicList
Old insertion speed:
1000000 in 0.61 s
2000000 in 2.24 s
3000000 in 3.97 s
4000000 in 5.76 s
5000000 in 7.54 s
6000000 in 9.41 s
7000000 in 11.5 s
New insertion speed:
1000000 in 0.01 s
2000000 in 0.02 s
3000000 in 0.01 s
4000000 in 0.02 s
5000000 in 0.01 s
6000000 in 0.01 s
7000000 in 0.01 s
- compatibility:
* 'polySpline' and 'simpleSpline' accepted
* detect and discard end tangent specifications
- a BSpline is also included (eg, for future support of NURBS), but is
not selectable from blockMesh since it really isn't as nice as the
Catmull-Rom (ie, doesn't *exactly* go through each point).
triangle, from:
http://en.wikipedia.org/wiki/Inertia_tensor_of_triangle
Adding the ability to calculate the inertia tensor of a polygon face
by summing the triangle inertias.
Added a test application to draw a test face with its principal
axes and moments of inertia.
- now that I re-examined the code, the note in commit 51fd6327a6
can be mostly ignored
PackedList isMaster(nPoints, 1u);
is not really inefficient at all, since the '1u' is packed into
32/64-bits before the subsequent assignment and doesn't involve
shifts/masking for each index
The same misinformation applies to the PackedList(size, 0u) form.
It isn't much slower at all.
Nonetheless, add bool specialization so that it is a simple assign.
