Function GetLosCollision

TombEngine/Game/collision/Los.cpp:114–275

	}

	LosCollisionData GetLosCollision(const Vector3& origin, int roomNumber, const Vector3& dir, float dist,
									 bool collideItemBoxes, bool collideItemSpheres, bool collideStatics)
	{
		// FAILSAFE.
		if (dir == Vector3::Zero)
		{
			TENLog("GetLosCollision(): dir is not a unit vector.", LogLevel::Warning);
			return {};
		}

		auto los = LosCollisionData{};

		auto GetRayHitPosition = [&](float hitDist)
		{
			return Geometry::TranslatePoint(origin, dir, hitDist);
		};

		auto GetHitPositionRoomNumber = [&](const Vector3& hitPos, const Vector3& basePos, int baseRoomNumber)
		{
			auto offset = hitPos - basePos;
			return GetPointCollision(basePos, baseRoomNumber, offset).GetRoomNumber();
		};

		auto AddItemSphereLos = [&](ItemInfo* item, int sphereID, const BoundingSphere& sphere, const Vector3& rayOrigin, const Vector3& hitPos, float hitDist)
		{
			auto itemSphereLos = ItemSphereLosCollisionData{};
			itemSphereLos.Item = item;
			itemSphereLos.SphereID = sphereID;
			itemSphereLos.Position = hitPos;
			itemSphereLos.RoomNumber = GetHitPositionRoomNumber(hitPos, item->Pose.Position.ToVector3(), item->RoomNumber);
			itemSphereLos.Distance = hitDist;
			itemSphereLos.IsOriginContained = sphere.Contains(rayOrigin);

			los.Spheres.push_back(std::move(itemSphereLos));
		};

		// 1) Collect room LOS collision.
		los.Room = GetRoomLosCollision(origin, roomNumber, dir, dist);

		// 2) Collect item box and sphere LOS collisions.
		if (collideItemBoxes || collideItemSpheres)
		{
			// Run through nearby items.
			auto items = GetNearbyItems(los.Room.RoomNumbers);
			for (auto* item : items)
			{
				// 2.1) Collect item box LOS collisions.
				if (collideItemBoxes)
				{
					auto obb = item->GetObb();

					float boxHitDist = 0.0f;
					if (!obb.Intersects(origin, dir, boxHitDist) || boxHitDist > los.Room.Distance)
						continue;

					auto boxHitPos = GetRayHitPosition(boxHitDist);

					// Collide clipped spheres.