Splinecart

Splinecart adds smooth, realistically curved railway tracks (composite curves / splines) to Minecraft. Minecarts travel on them without jerking, with full banking and speed physics.

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Main elements and mechanics

1. Track Ties

• Wooden (Wood Track Ties), Steel (Steel Track Ties), and Classic:
  • Can be placed on blocks and in mid-air.
  • Automatic alignment to look direction: floor (down), wall (forward), ceiling (up).
  • Empty-hand click rotates the tie.
  • Regular ties act as detector rails (emit Redstone signal 15 while a minecart passes).
  • Steel ties generate a third powered rail plus support pillars; wooden ties create wooden beams and posts.

2. Connecting tracks and variants

• The Track item joins two ties into a smooth path.
• Regular Track: standard smooth riding and corner smoothing.
• Chain Drive Track: pulls the minecart at constant speed uphill (ideal for roller coasters).
• Magnetic Track: when powered by Redstone it accelerates sharply; when unpowered it brakes the minecart to a stop even on steep slopes.
• Seamless transition with vanilla tracks: a minecart smoothly enters from splines onto regular rails and vice versa without losing momentum or camera rotation.

3. Turnouts / Switches

• Two tracks can leave or enter a single tie at the same time.
• The tie automatically becomes a Redstone-controlled switch:
  • State 0 (no signal): minecart follows the main track (1st exit).
  • State > 0 (Redstone powered): minecart immediately turns onto the alternate track (2nd exit).
  • Detector-rail function is disabled on a switch — lever/dust state changes take effect instantly, even with a whole train of minecarts following one another.

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Splinecart 0.5.5+26.3 — recipes and commands

Fabric, Minecraft 26.3. Every placeable or usable item has a shaped recipe. No item is missing a crafting recipe.

Recipes

All recipes live in src/main/resources/data/splinecart/recipe/. Each yields 4 or 8 items. Category: redstone.

Wood Track Ties (splinecart:wood_track_ties) — 8

File: wood_track_ties.json. Ties and wooden supports.

B B
BAB
B B

• A — stick (minecraft:stick)
• B — any wooden slab (#minecraft:wooden_slabs)

Track Ties (splinecart:track_ties) — 8

File: track_ties.json. Same layout as Wood Track Ties.

B B
BAB
B B

• A — stick
• B — any wooden slab

Steel Track Ties (splinecart:steel_track_ties) — 8

File: steel_track_ties.json. Couplers, third rail, and steel pillars.

B B
BAB
B B

• A — stick
• B — iron ingot (minecraft:iron_ingot)

Track (splinecart:track) — 4

File: track.json. Joins two ties. Default track with friction.

B
A
B

• A — rail (minecraft:rail)
• B — iron block (minecraft:iron_block)

Chain Drive Track (splinecart:chain_drive_track) — 4

File: chain_drive_track.json. Pulls carts.

 B
CAC
 B

• A — activator rail (minecraft:activator_rail)
• B — iron block
• C — iron chain (minecraft:iron_chain)

Magnetic Track (splinecart:magnetic_track) — 4

File: magnetic_track.json. Powered redstone accelerates. Unpowered magnetic track brakes and stops the cart.

 B
CAC
 B

• A — powered rail (minecraft:powered_rail)
• B — iron block
• C — copper block (minecraft:copper_block)

Recipe book

Unlock advancements live in data/splinecart/advancement/recipes/redstone/.

Item	Unlocks when the player has
Track Ties	a stick and a wooden slab
Wood Track Ties	a stick and a wooden slab
Steel Track Ties	a stick and an iron ingot
Track	a rail and an iron block
Chain Drive Track	an activator rail, an iron block, and an iron chain
Magnetic Track	a powered rail, an iron block, and a copper block

Commands

Every command starts with /splinecart. Registration: SplinecartCommands.

connect and build require gamemaster permission (level 2). supports, banking, and smoothing are player preferences. The console cannot set them.

connect and build take a track type and the player's support, banking, and smoothing preferences.

Track type (track): default (also track, normal), chain_drive (also chain), magnetic (also magnet).

/splinecart supports

Prints the player's support mode.

/splinecart supports <mode>

Sets the mode. Suggestions: none, wood, metal, steel, auto.

Mode	Aliases	Effect
none	bez, bez_supportow, no_supports	Places no supports
wood	wooden, drewniane, drewno	Wooden fences
metal	metalowe, iron, zelazo	Iron bars
steel	stal, slup, pillar, steel_pillar, slup_stalowy, metal_pillar	Steel pillars and a third rail
auto	—	Material from the segment geometry and nearby blocks

When a column would pass through a track below, it steps two blocks sideways. The same step happens when the track being built is upside down.

/splinecart banking

Prints whether new segments bank in curves. Player only.

/splinecart banking on|off|toggle

Enables, disables, or toggles banking.

/splinecart smoothing

Prints whether new ties smooth their facing toward the track tangents. Player only.

/splinecart smoothing on|off|toggle

Enables, disables, or toggles smoothing.

In-game shortcut: sneak and right-click air with a track or ties item. Sneak and right-click a tie toggles that one tie. An empty right-click on a connected tie also toggles smoothing.

/splinecart connect <track> <from> <to>

Joins two existing ties with one segment. Both positions must be loaded. Does not consume an item.

Example:

/splinecart connect default 0 64 0 16 70 8

/splinecart build line <track> <from> <to> [segments]

Places ties in a line from from to to and joins them with the chosen track. segments is the segment count, from 1 to 128. If omitted, the count is the block distance, clamped to 1–128.

Ties are wooden unless the support mode is steel. Then the command places steel ties.

Example:

/splinecart build line magnetic 0 64 0 40 64 0 8

/splinecart build path <track> <start> [waypoint1] ... [waypoint16]

Places a chain through the points. At least two positions are required. At most 16 waypoints plus the start, so 17 positions. Every point must be loaded.

Example:

/splinecart build path chain_drive 0 64 0 10 66 4 20 64 12