Method explode

src/Battlescape/TileEngine.cpp:1105–1335

* Handles explosions. * * HE, smoke and fire explodes in a circular pattern on 1 level only. HE however damages floor tiles of the above level. Not the units on it. * HE destroys an object if its armor is lower than the explosive power, then it's HE blockage is applied for further propagation. * See http://www.ufopaedia.org/index.php?title=Explosions for more info. * @param center Center of t

 * @param unit The unit that caused the explosion.
 */
void TileEngine::explode(const Position &center, int power, ItemDamageType type, int maxRadius, BattleUnit *unit)
{
	double centerZ = center.z / 24 + 0.5;
	double centerX = center.x / 16 + 0.5;
	double centerY = center.y / 16 + 0.5;
	int power_, penetration;
	std::set<Tile*> tilesAffected;
	std::pair<std::set<Tile*>::iterator,bool> ret;

	if (type == DT_IN)
	{
		power /= 2;
	}

	int exHeight = std::max(0, std::min(3, Options::battleExplosionHeight));
	int vertdec = 1000; //default flat explosion

	switch (exHeight)
	{
	case 1:
		vertdec = 30;
		break;
	case 2:
		vertdec = 10;
		break;
	case 3:
		vertdec = 5;
	}


	for (int fi = -90; fi <= 90; fi += 5)
//	for (int fi = 0; fi <= 0; fi += 10)
	{
		// raytrace every 3 degrees makes sure we cover all tiles in a circle.
		for (int te = 0; te <= 360; te += 3)
		{
			double cos_te = cos(te * M_PI / 180.0);
			double sin_te = sin(te * M_PI / 180.0);
			double sin_fi = sin(fi * M_PI / 180.0);
			double cos_fi = cos(fi * M_PI / 180.0);

			Tile *origin = _save->getTile(Position(centerX, centerY, centerZ));
			double l = 0;
			double vx, vy, vz;
			int tileX, tileY, tileZ;
			power_ = power + 1;
			penetration = power_;
			while (power_ > 0 && l <= maxRadius)
			{
				vx = centerX + l * sin_te * cos_fi;
				vy = centerY + l * cos_te * cos_fi;
				vz = centerZ + l * sin_fi;

				tileZ = int(floor(vz));
				tileX = int(floor(vx));
				tileY = int(floor(vy));

				Tile *dest = _save->getTile(Position(tileX, tileY, tileZ));