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Warning! This version of documentation is OUTDATED, as it describes an older SDK version! Please switch to the documentation for the latest SDK version.
Warning! This version of documentation describes an old SDK version which is no longer supported! Please upgrade to the latest SDK version.

GeodeticsPlugin

Warning
The functionality described in this article is not available in the Community SDK edition.
You should upgrade to Engineering / Sim SDK edition to use it.

A world created in Unigine uses Cartesian coordinates, whereas real-world simulators normally use geospatial data. To make these two universes match, UNIGINE provides GeodeticsPlugin.

This plugin allows translating GPS latitude, longitude, and altitude coordinates to X, Y, and Z and vice versa. The solution is applicable for both flat rectangular terrain areas and the planet-shaped Terrain Global.

See also#

Launching GeodeticsPlugin#

To use GeodeticsPlugin, specify the extern_plugin command line option on the application start-up:

Shell commands
main_x64 -extern_plugin "Geodetics"

Using GeodeticsPlugin#

Here is an example code that illustrates how to position an object in a world using geodetic coordinates:

Source code (C++)
#include <UnigineGeodeticsTransformer.h>


void init()
{
	auto transformer = GeodeticsTransformer::get();
	if (!transformer)
	{
		Log::warning("Can't get transformer\n");
		return 0;
	}

	int epsg_code = 3857; // EPSG Geodetic Parameter Datase code 
	dvec3 geodetic_origin = dvec3_zero;
	dvec3 original_geo_pos = dvec3(35.105580, -89.966775, 0.0);
	dvec3 world_pos, geo_pos;

	// setup projection
	transformer->setProjectionEpsg(epsg_code, geodetic_origin);
	// geodetic to world
	world_pos = transformer->geodeticToWorld(original_geo_pos).getTranslate();
	// world to geodetic
	geo_pos = transformer->worldToGeodetic(world_pos);

	Log::message("original geo_pos %f %f %f \n", original_geo_pos.x, original_geo_pos.y, original_geo_pos.z);
	Log::message("world_pos %f %f %f \n", world_pos.x, world_pos.y, world_pos.z);
	Log::message("geo_pos %f %f %f \n", geo_pos.x, geo_pos.y, geo_pos.z);
}
Last update: 2021-12-13
Build: ()