private void MergeWalls(Wall wall1, Wall wall2)
{
Point intersection;
if (wall1.Beginning().Equals(wall2.Beginning()) || wall1.Beginning().Equals(wall2.End()))
{
intersection = wall1.Beginning();
}
else
{
intersection = wall1.End();
}
Wall newWall = wall1.MergeCollinearContinuous(wall2);
materials.RemoveWall(wall1);
materials.RemoveWall(wall2);
RemoveBeamInPoint(intersection);
materials.AddWall(newWall);
}