OpenTerrain

The libMini library is able to display a height field at real-time. For that purpose, it employs a C-LOD algorithm that displays the terrain geometry with a dynamically generated set of triangles. The triangle mesh is rendered using OpenGL vertex buffers and triangle fans.

The density of the triangle mesh adapts to the point of view and terrain curvature, meaning that fewer triangles are generated for terrain geometry that is far away and more triangles are generated for terrain geometry that is highly curved. For example, a flat plain is displayed with only a handful of triangles, whereas a rocky mountain is displayed with a high number of triangles to preserve the high detail of the mountain’s shape.