Extracting an Interval Volume

Extracting an Interval Volume

An interval volume is a set of tetrahedra that span a space between two isovalues within a volume. Since a tetrahedral mesh is a solid, iVolume displays the outer surface of the mesh as a set of polygons. This surface cannot be translated, scaled, or rotated relative to the volume but does move with the volume.

To create an interval volume, select Operations ® Volume ® Interval Volume, and a dialog appears allowing you to set two isovalues.

If the volume is multi channel, you can select a channel for setting the isovalues and then create an interval volume for that channel by selecting OK.

Note

Vertex colors are not persevered during decimation.

Note

Interval volume surfaces often contain a large number of polygons, which can degrade iVolume's display performance. When selecting isovalues, you can specify a decimation percentage to reduce the number of polygons in the resulting surface. This decimation step requires additional time, but the resulting surface will contain fewer triangles and will draw faster.