tkCassiopee : closing/fixing holes in a surface

This tutorial demonstrates how to obtain a closed surface from an open surface. Using a closed surface is usefull for a variety of algorithms.
You should already have read how to select zones and how to open applets.
[Dowload sample file].

      Closing/fixing a hole in a sphere by C. Benoit.

As a start, we consider an open sphere (Fig. 1) made of structured patches. We want to obtained a close, watertight surface from this sphere.

Step 1: get a single triangular zone
First, we will convert structured blocks to a single triangle zone. You can of course bypass this step if your surface is already triangular.
First open Block::tkBlock and Block::tkSplit. Then, select all blocks and convert them to triangles using Block::tkBlock::convert2Tetra. Once done, join all zones in a single zone using Block::tkSplit::join (Fig. 2).

Step 2: get the hole contours
Get the exterior edges of this surface using Block::tkBlock::ExteriorFaces (Fig. 3).

Step 3: fill the hole contours
Open Surf::tkFixer2. Select the exterior edges, and create the filling surface with Surf::tkFixer2::Fix gap in contour. You can bump more or less the filling surface using the slider.

Finally, delete the exterior edges zone and join all zone in one (Fig. 4).
More: Tutorials - Gallery - Get support - Download - Citation - Contribute - Reference documentation