Check translated data for quality (Topology Analysis)

1. In the part browser, double-click the Construction folder to enter the construction environment. Alternatively, you can right-click the Construction folder and select Edit Construction.
2. Select solids or surfaces within the Construction folder for examination, using one of the following methods:
   • On the ribbon, click Construction tab Manage panel Quality Check . Select data in the graphics window.
     Note: "Data" refers to solids and surfaces.
   • Right-click the Construction folder, and select Quality Check. All data in the construction folder is checked.
   • Right-click a group node in the browser, and select Quality Check. Only data in the group node is checked.
   • In the graphics window, click and drag a window to select solids or surfaces. Right-click and select Quality Check. Selected solids or surfaces are checked.
3. Select Examine to check the data.

Topology Analysis

Topology is the relationship between geometric components. Topology analysis lists bodies or surfaces with topology errors and groups them by error type. Always try to repair geometric errors before repairing topology errors.

Topology errors

Topology errors
Loop orientation	The outer loop is going in a wrong direction compared to the face normal direction. If the face has islands (loops enclosed within the outer loop), the normal direction of the islands must point opposite to the outer loop. Loop direction is defined by the start and endpoints and direction indicator. In addition to the loop and islands having the same direction, a surface has a normal direction that must agree with the loop direction. If any of the directions are opposite to the others, an error is detected.
Face orientation	The top side of a face is referred to as the surface normal. Adjacent faces within a solid must all have the same normal direction. For example, all six faces of a box must point in to be a valid solid. The loop direction is inconsistent with the normal direction of the face or inner loops do not agree with each other.
Loop connectivity	Geometry such as lines, arcs, and splines are combined into structures. Many edges and geometry can be combined into structures referred to as loops. Loops are used as boundaries on surfaces, and they trim a potentially infinite size to a face. Sometimes, the structure of the loop is incorrect in the neutral IGES or STEP file.
Duplicate vertices	Start and endpoints of an edge are vertices. During translation, attempts are made to merge vertices that fall within the system tolerances. Duplicate vertices can occur when small edges comprise a complex object.
Bad face missing data	The face does not have its underlying geometric definition and is incomplete. Typically, the face cannot be used for modeling.
Bad edge missing data	The edge does not have its underlying geometric definition and is incomplete. Typically, the edge cannot be used for modeling.