ITEM Tutorial Step 5
Step 5: Build a Meshable Topology
The next step in the mesh generation process can be one of the most
challenging. Building a meshable topology involves decomposing
an assembly into meshable parts. For sweeping, this means decomposing
it into volumes composed of many-to-one
and one-to-one sweepable parts. Each decomposed volume is further
constrained because it needs to be able to share boundary meshes on merged
surfaces. Since the number of possible decomposition strategies are numerous,
it is not yet possible to automatically decompose most models. Instead,
the ITEM framework seeks to provide possible decomposition
options to the user, which they can be easily executed (and if necessary,
quickly undone).
- Click Build meshable topology
- Click Decompose volume
- Click Check Meshability
- Examine Volume 3. There is 1 source and 1 target
surface and it is sweepable.
- Examine Volume 1. There are two source surfaces
and two target surfaces. It needs to be webcut cylindrically through
middle
- Click on Volume 1
- Choose cylindrical webcut and execute making sure the imprint and
merge after webcut is checked
- Examine Volume 2. The tall portion should be swept
around in the direction of the holes. The bottom portion should be
swept from top to bottom. It is many to one sweepable if webcut cylindrically
around inner cylinder.
- Choose cylindrical webcut that cuts off thicker part at bottom
of Volume 4.
- Click Done.
- Click Done after running checked diagnostics again
to verify.
- Click Done.
