peterwolf's Splinecart

0.5.1+1.21.11

• Backport to Minecraft 1.21.11.
• Allowed minecarts on parallel tracks to pass each other smoothly without colliding or pushing each other apart (ignoring vehicle and passenger bounding box collisions between different track segments while preserving collisions between carts on the same segment).
• Fixed converging / merging track switches: joining ties now correctly register secondary incoming tracks (prevAlt) and sync their switch blockstate.
• Enabled bidirectional switch routing: when a minecart travels in reverse through a converging track tie (joining two tracks), redstone power now toggles which incoming branch (prev vs prevAlt) the minecart takes.
• Added the ability to toggle smoothing on track ties during building:
  • Toggle default player smoothing preference via /splinecart smoothing on|off|toggle or /splinecart smoothing to query.
  • Sneak + right-click in the air with Track Ties or Track item to quickly toggle default smoothing mode.
  • Sneak + right-click directly on any track tie (with empty hand, Track item, or Track Ties item) to toggle smoothing on that specific tie.
  • Right-clicking connected track ties with an empty hand now also toggles smoothing.
  • HUD displays real-time track tie smoothing status (Tie Smoothing: ON / OFF) and shortcut hints when aiming at a track tie during building.
  • Track building commands (/splinecart build line, /splinecart build path, /splinecart connect) now respect player smoothing preferences.
• Track ties with smoothing enabled now automatically adjust their orientation to connected tracks:
  • Start, end, intermediate, and switch ties automatically calculate track heading and curve tangents.
  • In-world track tie blocks rotate (POINTING) so that their sleepers, rail clips, and directional arrows visually align with the connected tracks.
  • Orientation dynamically adjusts whenever tracks are placed, connected, removed, or when smoothing is toggled on.