Definitions (continued)

Vertex

A point at the corner of one of the many polygons which make up a scene in a 3D application such as a flight simulator.  When terrain mesh scenery is displayed in Flight Simulator, each set of four data points making up a rectangular area in the compiled terrain mesh scenery is displayed as four points or vertices at the corners of two adjacent triangles dividing the rectangle diagonally from corner to corner.

Vertex Level

Vertex Level refers to the distance between adjacent East-West or North-South vertices as they are displayed in the scene. As with LOD, increasing Vertex Levels correspond to decreasing distance between the vertices and therefore increased resolution in the displayed object or feature.

The following table shows this relationship:

Terrain Max Vertex Level (TMVL)

This is the Flight Simulator setting which defines the minimum East-West and North-South distance between adjacent vertices as displayed in the rendered scene in Flight Simulator.

In order to display at this level, the terrain mesh scenery used must be of sufficiently high compiled resolution to be able to provide the vertex data at this resolution.

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