Basic concepts of Modeler for Autodesk

MAGNET Modeler has two separate main modules, Modeler and the Explorer. Modeler is used to create a virtual model (.vm file) from a CAD drawing and other sources.

MAGNET Modeler supports polylines, lines, points, blocks, splines, ellipses arcs and circles for creation of the virtual model. If the map has 3D information it is used based on the way each object type uses it.

MAGNET Modeler does not correct errors in the source data. In many old maps there are errors that may affect the virtual modeling. The input data should consist of closed and continuous polylines. For example, crossing polylines and gaps in polylines cause problems when modeling buildings or material areas, but work well when modeling fences or element chains.

In general MAGNET Modeler does not use or require any specific units. Units are the same throughout the software, except for some features that work with meters (m). These include the “walk” mode and the “speedometer”. These features work correctly if the model has been created in metric system (1 m = 1 unit).


Terrain Model

MAGNET Modeler terrain model is a surface that can be read from any grid, triangular network or mesh that is in an AutoCAD drawing as 3D face elements.

All other MAGNET Modeler objects are modeled on top of the terrain unless otherwise defined. The terrain model is the basis for the whole model. If there is no terrain model defined, a flat terrain covering all the map elements is generated.


Surface is a set of 3D surface elements with materials attached. Surfaces can be generated from various surface objects, such as surface models, road models, material areas, roadlines and ditches. Each surface object has specific material, texturing and input geometry options.


Objects are 3D models such as buildings, fences, 3D meshes and texts that have complex geometry, special texturing modes and may contain multiple materials. Objects are generated from complex input data like polylines, texts or 3D surfaces.


Elements are texture elements or 3D surface elements that are defined by insertion point (x,y,z), rotation angle and scale. Elements can be generated from single positions (points, blocks), along polyline as element chains or filled inside closed polylines as element areas. Forest objects also generates elements.