Method loadDat

src/Geoscape/Globe.cpp:548–599

* Loads a series of map polar coordinates in X-Com format, * converts them and stores them in a set of polygons. * @param filename Filename of the DAT file. * @param polygons Pointer to the polygon set. * @sa http://www.ufopaedia.org/index.php?title=WORLD.DAT */

 * @sa http://www.ufopaedia.org/index.php?title=WORLD.DAT
 */
void Globe::loadDat(const std::string &filename, std::list<Polygon*> *polygons)
{
	// Load file
	std::ifstream mapFile (filename.c_str(), std::ios::in | std::ios::binary);
	if (!mapFile)
	{
		throw Exception(filename + " not found");
	}

	short value[10];

	while (mapFile.read((char*)&value, sizeof(value)))
	{
		Polygon* poly;
		int points;
		
		for (int i = 0; i < 10; ++i)
		{
			value[i] = SDL_SwapLE16(value[i]);
		}

		if (value[6] != -1)
		{
			points = 4;
		}
		else
		{
			points = 3;
		}
		poly = new Polygon(points);

		for (int i = 0, j = 0; i < points; ++i)
		{
			// Correct X-Com degrees and convert to radians
			double lonRad = value[j++] * 0.125f * M_PI / 180;
			double latRad = value[j++] * 0.125f * M_PI / 180;

			poly->setLongitude(i, lonRad);
			poly->setLatitude(i, latRad);
		}
		poly->setTexture(value[8]);

		polygons->push_back(poly);
	}

	if (!mapFile.eof())
	{
		throw Exception("Invalid globe map");
	}

	mapFile.close();
}

/**
 * Sets a leftwards rotation speed and starts the timer.