Skip to content

NTDF design

Jump to bottom Edit New page
Michael Steenbeek edited this page Jun 28, 2024 · 2 revisions

This page is a work in progress by Gymnasiast. Do not make any changes to this page. Doing so may result in a ban.

General notes

All strings are UTF-8 and preceded by their length.

Comparison between TD6 and NTDF

Data TD6 NTDF Comments
Ride/RTD type uint8 object identifier string
Vehicle type index uint8_t N/A Not actually saved in TD6, but left open for RCT2 to write the index after load.
Vehicle type - uint8 + DAT entry or object identifier string 0 = DAT, 1 = string
Flags uint32_t TBD RCT2 reuses this field for the cost
Ride mode uint8 uint8
Version and colour settings uint8 TBD Lower two bits contain colour settings, the rest is used for the version
Body and trim colour settings 32 × 2 × uint8 (moved to a block that also contains the 3rd colour
Padding at 0x48 uint8 -
Entrance style uint8 object identifier string
Track colour settings - 4 × 3 × uint8
Vehicle colour settings -
Total air time uint8 moved to the rest of the statistics block
Departure flags uint8 uint8
Number of trains uint8 uint16?
Number of cars per train uint8
Minimum waiting time uint8 uint8
Maximum waiting time uint8 uint8
Additional operating setting uint8 uint8
Maximum speed uint8 uint8
Average speed uint8 uint8
Ride length uint16 TBD
Max pos. vertical G uint8 uint8
Max neg. vertical G sint8 sint8
Max lat. G uint8 uint8
Num inversions/holes uint8 TBD
Num drops uint8 TBD
Highest drop height uint8 TBD
Excitement uint8 uint8
Intensity uint8 uint8
Nausea uint8 uint8
Upkeep cost money16 money64
Track spine colour 4 × uint8 moved upwards and merged
Track rail colour 4 × uint8 moved upwards and merged
Track support colour 4 × uint8 moved upwards and merged
Secondary flags uint32 -
Vehicle object DAT entry moved upwards
Space required, x uint8 -
Space required, y uint8 -
Space required - TileCoordsXY
Vehicle colour 3 32 × uint8 Merged with other two
Lift hill speed + num circuits 1 × uint8 2 × uint8 Stored separately in NTDF

New structures

An NTDF file will contain a few blocks/chunks:

  1. Ride/vehicle settings block
  2. Operating settings block
  3. Colour/appearance settings block
  4. Statistics block
  5. Station statistics blocks (preceded by number)

Ride/vehicle settings block

Name Representation
NTDF version uint64_t
Minimum backwards compatible NTDF version uint64_t
RTD object identifier string (may be empty in order to represent a general/scenery blueprint
Vehicle uint8 + DAT object or object identifier strings
Num trains
Num cars per train

Operating settings block

Name Representation
Ride mode uint8
Lift hill speed uint8
Num circuits uint8
Additional operating setting
Departure flags uint8
Minimum waiting time uint8
Maximum waiting time uint8

Colour/appearance settings block

Name Representation
Track colour schemes 4 × 3 × uint8
Entrance style object identifier string
Vehicle colour settings uint8
Vehicle colours n × 3 × uint8 (preceded by length (uint64))

Statistics block

Keeps the same order as the Ride window

Name Representation
Excitement uint16
Intensity uint16
Nausea uint16
Max. speed
Average speed
Max pos. vertical G uint8
Max neg. vertical G sint8
Max lat. G uint8
Total air time
Num drops
Highest drop height
Num inversions
Space required
Upkeep cost

Station statistics block

Name Representation
Ride time
Ride length
Add a custom footer
Clone this wiki locally