RTOPO is useful in topography for representing and editing 3D points (by 3DPOLY, SPLINE OR BLOCK entities) and for triangulation, isolines, projections, cross sections and longitudinal profile. RTOPO exists a modifiable library for codes and BLOCKs. The coordinates, the code and the position (in 3DPOLY or SPLINE) of the points can be modified interactively. RCAD core provides OpenGL real-time orbit, pan, zoom, shading and lighting.
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