How to launch a single player game through command line?

[music7box]

I need to launch the game without showing main menu for simplicity.

 

Now I know how to connect to a (remote) server and join its running world directly (without showing main menu) by passing --server and --port command args to launch the game. It works pretty well.

 

But I have no idea on how to create a single player world or reenter the single player world created before directly without main menu.

 

I really need this functionality. Please help me. Many thanks in advance.

 

 

 

Here are the information I've collected.

optionparser.accepts("server").withRequiredArg();

optionparser.accepts("port").withRequiredArg().ofType(Integer.class).defaultsTo(Integer.valueOf(25565), new Integer[0]);

optionparser.accepts("gameDir").withRequiredArg().ofType(File.class).defaultsTo(new File("."), new File[0]);

optionparser.accepts("assetsDir").withRequiredArg().ofType(File.class);

optionparser.accepts("resourcePackDir").withRequiredArg().ofType(File.class);

optionparser.accepts("proxyHost").withRequiredArg();

optionparser.accepts("proxyPort").withRequiredArg().defaultsTo("8080", new String[0]).ofType(Integer.class);

optionparser.accepts("proxyUser").withRequiredArg();

optionparser.accepts("proxyPass").withRequiredArg();

optionparser.accepts("username").withRequiredArg().defaultsTo("Player" + Minecraft.getSystemTime() % 1000L, new String[0]

optionparser.accepts("uuid").withRequiredArg();

optionparser.accepts("accessToken").withRequiredArg().required();

optionparser.accepts("version").withRequiredArg().required();

optionparser.accepts("width").withRequiredArg().ofType(Integer.class).defaultsTo(Integer.valueOf(854), new Integer[0]);

optionparser.accepts("height").withRequiredArg().ofType(Integer.class).defaultsTo(Integer.valueOf(480), new Integer[0]);

optionparser.accepts("userProperties").withRequiredArg().required();

optionparser.accepts("assetIndex").withRequiredArg();

optionparser.accepts("userType").withRequiredArg().defaultsTo("legacy", new String[0]);

 

Above are Minecraft Launch Parameters Arguments I copied from forge source code.

So basically we have these parameters to pass when launching the game:

server

port

gameDir

assetsDir

resourcePackDir

proxyHost

proxyPort

proxyUser

proxyPass

username

uuid

accessToken

version

width

height

userProperties

assetIndex

userType

 

[LexManos]

The answer is you can't. Vanilla doesnt have this feature you'd have to write a mod to add it.

[music7box]

Is there any guidance for making a mod like you said?

 

I only got some books and online tutorials talking about manipulating recipes, blocks and armor.