Terraria 1.2 hardmode boss spawning

// Main.UpdateTime()

// actually spawning bosses:
if (WorldGen.spawnHardBoss > 0 && Main.netMode != 1 && Main.time > 4860.0)
{
    for (int j = 0; j < 255; j++)
    {
        if (Main.player[j].active && !Main.player[j].dead && (double)Main.player[j].position.Y < Main.worldSurface * 16.0)
        {
            if (WorldGen.spawnHardBoss == 1)
            {
                NPC.SpawnOnPlayer(j, 134);
            }
            else
            {
                if (WorldGen.spawnHardBoss == 2)
                {
                    NPC.SpawnOnPlayer(j, 125);
                    NPC.SpawnOnPlayer(j, 126);
                }
                else
                {
                    if (WorldGen.spawnHardBoss == 3)
                    {
                        NPC.SpawnOnPlayer(j, 127);
                    }
                }
            }
            WorldGen.spawnHardBoss = 0;
            break;
        }
    }
}


// check for spawn:
if (Main.netMode != 1 && Main.hardMode && !WorldGen.spawnEye && WorldGen.altarCount > 0 && Main.rand.Next(10) == 0 && (!NPC.downedMechBoss1 || !NPC.downedMechBoss2 || !NPC.downedMechBoss3))
{
    int m = 0;
    while (m < 1000)
    {
        int num5 = Main.rand.Next(3) + 1;
        if (num5 == 1 && !NPC.downedMechBoss1)
        {
            WorldGen.spawnHardBoss = num5;
            if (Main.netMode == 0)
            {
                Main.NewText(Lang.misc[28], 50, 255, 130, false);
                break;
            }
            if (Main.netMode == 2)
            {
                NetMessage.SendData(25, -1, -1, Lang.misc[28], 255, 50f, 255f, 130f, 0);
                break;
            }
            break;
        }
        else
        {
            if (num5 == 2 && !NPC.downedMechBoss2)
            {
                WorldGen.spawnHardBoss = num5;
                if (Main.netMode == 0)
                {
                    Main.NewText(Lang.misc[29], 50, 255, 130, false);
                    break;
                }
                if (Main.netMode == 2)
                {
                    NetMessage.SendData(25, -1, -1, Lang.misc[29], 255, 50f, 255f, 130f, 0);
                    break;
                }
                break;
            }
            else
            {
                if (num5 == 3 && !NPC.downedMechBoss3)
                {
                    WorldGen.spawnHardBoss = num5;
                    if (Main.netMode == 0)
                    {
                        Main.NewText(Lang.misc[30], 50, 255, 130, false);
                        break;
                    }
                    if (Main.netMode == 2)
                    {
                        NetMessage.SendData(25, -1, -1, Lang.misc[30], 255, 50f, 255f, 130f, 0);
                        break;
                    }
                    break;
                }
                else
                {
                    m++;
                }
            }
        }
    }
}