[Mod] Carts [carts]

[PilzAdam]

New model:
http://pastebin.sabayon.org/pasties/store/11564/cart.x
Should work without modifying init.lua

Nice!
Now, one last thing: Move the pitch frames a little bit into the upwards facing direction, so that it looks better when a player sits in the cart and looks down.

[jojoa1997]

:-D

[PilzAdam]

Update:
3D model added. It supports pitch when driving down/uphill.
The cart now gets picked up when holding shift while punching it.
Updated mesecon API functions.

[VanessaE]

I'm finding that the carts can no longer be placed on default steel rails, but they seem to work fine on moreores copper rails.

[jojoa1997]

also the mese torches dont boost the carts

[VanessaE]

Confirmed, mesecons power sources aren't boosting the carts' speed anymore.

[RAPHAEL]

Confirmed, mesecons power sources aren't boosting the carts' speed anymore.

Same here. However torches placed prior to update still propel carts. Just not newly placed torches.

[jojoa1997]

not for our server

[PilzAdam]

Are you sure you have latest carts mod and latest mesecons installed?

[jojoa1997]

Are you sure you have latest carts mod and latest mesecons installed?

yes she updated both the carts and mesecons today.

[PilzAdam]

Okay, fixed the problem. It was double re-definition of default rails with moreblocks. Calinou removed the one in moreblocks so now it should work fine.

[RAPHAEL]

Okay, fixed the problem. It was double re-definition of default rails with moreblocks. Calinou removed the one in moreblocks so now it should work fine.

Hmm latest version of carts seems to introduce an issue. Previous versions sometimes the cart would just "stop" all of a sudden at random. Now when it does that "stop" it starts going in opposite direction.

Also an issue I've noticed even with previous versions is occasionally cart will embed itself underground after a long slope down.

[trukoil]

Idea (maybe right for the Technic mod): electric powered cart, where W speeds up and S speeds down, made with (C -> cart; B -> batteries):

B B B
B C B
B B B

Eight batteries, the cart would have the charge of battery*8, and the electric cart block may be charged on the battery box.
Mesecon energy could load batteries.

Power drain could depend on speed.

[botokiller]

This page: http://multa.bugs3.com/minetest/forum/viewmod.php?id=18
says that there should be switches, cart detectors, cart slowers, railchests etc. I'd very much like to try them, but I can't find any of them in the mod .zip archive. Where are they?

[jojoa1997]

That is with the old version. Before minetest 0.4.4 and the carts were laggier. Adam had to rewrite the program for 0.4.4

[glomie]

You can make switch with mesecon piston, as it was done in my server.

[VanessaE]

The only problem with using pistons for switches (which we do on my server also) is that a piston only has two states (basically stop/go or turn/don't-turn if your tracks are simple, or turn-left/turn-right with a somewhat convoluted track layout around the piston), but one of those carts switches has *three*, allowing for left and right turns or stopping entirely.

[glomie]

So, using two piston ?

[jojoa1997]

So, using two piston ?

i have 3 pistons on here server and it is COMPLICATED

[J-Block]

Hi, I'm really new to this site so sorry if I do something wrong.

I downloaded this mod and for some reason it fails to load. It displays the message (NOT copying and pasting):

Failed to load and run C:\Users\..\Documents\minetest-0.4.4-win32\minetest-0.4.4-win32\bin\..\mods\minetest\PilzAdam-carts-01b4bc5\init.lua

[jojoa1997]

Hi, I'm really new to this site so sorry if I do something wrong.

I downloaded this mod and for some reason it fails to load. It displays the message (NOT copying and pasting):

Failed to load and run C:\Users\..\Documents\minetest-0.4.4-win32\minetest-0.4.4-win32\bin\..\mods\minetest\PilzAdam-carts-01b4bc5\init.lua

Rename the mod to carts. Its okay this happens to everyone. I had the same problem. If you look in the topic name [Mod] Carts [carts] the words in the [] are usually what you name it.

[J-Block]

Hi, I'm really new to this site so sorry if I do something wrong.

I downloaded this mod and for some reason it fails to load. It displays the message (NOT copying and pasting):

Failed to load and run C:\Users\..\Documents\minetest-0.4.4-win32\minetest-0.4.4-win32\bin\..\mods\minetest\PilzAdam-carts-01b4bc5\init.lua

Rename the mod to carts. Its okay this happens to everyone. I had the same problem. If you look in the topic name [Mod] Carts [carts] the words in the [] are usually what you name it.

Oh, ok, thanks, I'll remember that! It's working well now!

EDIT: I saw in the first post you can power it with the mesecons mod, but I don't have that. Is there an alternative power source or is that the only one?

[VanessaE]

Glomie: Using two pistons requires a bare minimum of EIGHT nodes' worth of space (two pistons, two switches, two pieces of track that can move, and one space each for the track to move into/out of when the piston moves), where two (one track, one switch) was sufficient before. Add several more nodes if you need extra wiring to position the switches conveniently.

And if you want left-right behavior out of a piston, you need roughly 12 nodes worth of space for just one such turnout because of the way the track has to be routed to allow for such a thing.

There are examples of these arrangements on my server.

[jordan4ibanez]

Pilzadam I was beginning to develop trains with your mod, while I'm on break I hope to see you develop the ability for minecarts to essentially be "attached" to eachother.
I was starting with a very simple code:
Replace this:

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

    local dir = cart_func:velocity_to_dir(self.velocity)

Which is in the on_step function of your carts with:

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

    for _,object in ipairs(minetest.env:get_objects_inside_radius(pos, 10)) do
        if object:is_player() then
            local objdir = object:getpos()
            self.velocity.x = objdir.x - pos.x
            self.velocity.z = objdir.z - pos.z
        end
    end
    local dir = cart_func:velocity_to_dir(self.velocity)

This essentially makes the minecarts pathfind to a player through rails, this can be further heavily developed into attaching carts to eachother by right clicking with a special chain tool or something. You'd have to add another another self variable, which would be self.follow. But I did not get to that point yet. Let me explain further:
1.) A player right clicks the cart that should be the "lead" for the other cart with the tool.
2.) When the player clicks that cart, the luaentity should be stored in a table for that player's name.
3.) When the player clicks the "following" cart, it would be given the self variable (self.follow) of the luaentity it is supposed to follow.
4.) On step, if the luaentity it is supposed to follow is in it's radius (Maybe a radius of 5 or so) It would try to go towards that other cart.
5.) If it gets stopped, or disconnected (Someone breaks the rail in between them and the "lead" cart gets away) then the radius function should set the self.follow variable to nil or "" so that it will not try to follow the cart as if the connection between the "lead" and the "follow" broke.


Also, i have made a train out of your cart, it is very simple but it looks nice-ish. This train should get if the player is pushing the move forward key (w) and backwards key (s), and move forward, and stop/move backwards accordingly.

Here is a mesh that kaeza made: http://pastebin.com/raw.php?i=5Wz8BqA5
It is very simple and needs to be moved forward a bit so it appears that you are actually sitting in the train. I hope you can work with this information, as it will greatly help minetest achieve another awesome mod. Best of wishes. and merry Christmas.

[PilzAdam]

EDIT: I saw in the first post you can power it with the mesecons mod, but I don't have that. Is there an alternative power source or is that the only one?

You can punch the cart to accelerate it. Or simply drive downhill.

[PilzAdam]

Pilzadam I was beginning to develop trains with your mod, while I'm on break I hope to see you develop the ability for minecarts to essentially be "attached" to eachother.
I was starting with a very simple code:
Replace this:

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

    local dir = cart_func:velocity_to_dir(self.velocity)

Which is in the on_step function of your carts with:

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

    for _,object in ipairs(minetest.env:get_objects_inside_radius(pos, 10)) do
        if object:is_player() then
            local objdir = object:getpos()
            self.velocity.x = objdir.x - pos.x
            self.velocity.z = objdir.z - pos.z
        end
    end
    local dir = cart_func:velocity_to_dir(self.velocity)

This essentially makes the minecarts pathfind to a player through rails, this can be further heavily developed into attaching carts to eachother by right clicking with a special chain tool or something. You'd have to add another another self variable, which would be self.follow. But I did not get to that point yet. Let me explain further:
1.) A player right clicks the cart that should be the "lead" for the other cart with the tool.
2.) When the player clicks that cart, the luaentity should be stored in a table for that player's name.
3.) When the player clicks the "following" cart, it would be given the self variable (self.follow) of the luaentity it is supposed to follow.
4.) On step, if the luaentity it is supposed to follow is in it's radius (Maybe a radius of 5 or so) It would try to go towards that other cart.
5.) If it gets stopped, or disconnected (Someone breaks the rail in between them and the "lead" cart gets away) then the radius function should set the self.follow variable to nil or "" so that it will not try to follow the cart as if the connection between the "lead" and the "follow" broke.


Also, i have made a train out of your cart, it is very simple but it looks nice-ish. This train should get if the player is pushing the move forward key (w) and backwards key (s), and move forward, and stop/move backwards accordingly.

Here is a mesh that kaeza made: http://pastebin.com/raw.php?i=5Wz8BqA5
It is very simple and needs to be moved forward a bit so it appears that you are actually sitting in the train. I hope you can work with this information, as it will greatly help minetest achieve another awesome mod. Best of wishes. and merry Christmas.

Thanks for this bunch of information. Now I have something to do. But I dont know if I can start right away, I have some other things to do. But I will try my best.

[BrandonReese]

I had the idea to make a jousting arena... make two oval tracks one block apart from each other, have the competitors put a cart on the track and have them go in opposite directions and as they pass by each other attack until one of the competitors is dead. I was sorely disappointed when I was testing this that when I tried to attack the other player it just accelerated their cart, which makes sense once I thought about it.

This is my question... if I modify the code so it doesn't accelerate the cart if you are wielding a sword, will I be able to hurt the person attached to the cart?

[aximx51v]

Is there a way to limit cart speed? I have a track that runs down hill. If i put mesecons alongside it to push my cart up the hill, when i go down the hill i end up going so fast that, well... let's just say glitch city.
what if mesecons could act as brakes for the cart? like, mesecons on the right side speed the cart up, and mesecons on the left slow it down. or maybe a mesecon block that slows down/speeds up the cart to a specific speed, regardless of direction?
all in all, great mod so far!

[rarkenin]

Is there a way to limit cart speed? I have a track that runs down hill. If i put mesecons alongside it to push my cart up the hill, when i go down the hill i end up going so fast that, well... let's just say glitch city.
what if mesecons could act as brakes for the cart? like, mesecons on the right side speed the cart up, and mesecons on the left slow it down. or maybe a mesecon block that slows down/speeds up the cart to a specific speed, regardless of direction?
all in all, great mod so far!

No, you can't, since Mesecons triggers a per-node on or off. I'll make a manual powered rail and manual brake rail, and I'll submit a pull request for that.

[PilzAdam]

Is there a way to limit cart speed? I have a track that runs down hill. If i put mesecons alongside it to push my cart up the hill, when i go down the hill i end up going so fast that, well... let's just say glitch city.
what if mesecons could act as brakes for the cart? like, mesecons on the right side speed the cart up, and mesecons on the left slow it down. or maybe a mesecon block that slows down/speeds up the cart to a specific speed, regardless of direction?
all in all, great mod so far!

No, you can't, since Mesecons triggers a per-node on or off. I'll make a manual powered rail and manual brake rail, and I'll submit a pull request for that.

Would be nice.