Documentation/Engine/Units/accessory transmission data
< Documentation | Engine | UnitsRevision as of 22:17, 27 July 2017 by Smarty (talk | contribs) (→Attributes: Added new 1.28 attribute, auxiliary_brakes)
The accessory_transmission_data unit class is used to define the transmission characteristics for the player's vehicle, as well as the differential ratio. Units of this type are usually defined in /def/vehicle/truck/<brand.model>/transmission/*.sii and valid unit names end in .transmission.
Attributes
Many common attributes are inherited from accessory_data.
| Name | Type | Default Value | Description |
|---|---|---|---|
| stall_torque_ratio | float | -1.0 | Torque ratio multiplier if torque converter/multiplier is present. Any positive value is used as multiplier on lower RPM torque. |
| differential_ratio | float | 1.0 | This defines the differential/final drive ratio between the transmission output shaft and the wheels. |
| retarder | uint | 0 | The number of output levels for the retarder if applicable. If zero, retarder behavior is disabled for the transmission. |
| auxiliary_brakes | array<float3> | When set, this overrides the retarder control so that it controls both the retarder and engine brake. The components are (retarder strength, engine brake strength, downshift). The value of retarder must match the number of members in auxiliary_brakes. (Added in 1.28) For example:
retarder: 5 auxiliary_brakes[]: (0.3, 0, 0) // 30% retarder only auxiliary_brakes[]: (0.6, 0, 0) // 60% retarder only auxiliary_brakes[]: (1.0, 0, 0) // 100% retarder only auxiliary_brakes[]: (1.0, 1, 0) // 100% retarder and 100% engine brake auxiliary_brakes[]: (1.0, 1, 1) // 100% retarder, 100% engine brake and downshift | |
| ratios_reverse | array<float> | This defines the reverse gear ratios in order of decreasing gear reduction. The values should be negative. Example:
ratios_reverse[0]: -11.002 ratios_reverse[1]: -8.875 | |
| ratios_forward | array<float> | This defines the forward gear ratios in order of decreasing gear reduction. The values should be positive. Example:
ratios_forward[0]: 11.32 ratios_forward[1]: 9.132 ratios_forward[2]: 7.207 ...etc... | |
| transmission_names | owner_ptr | Points to a unit of the type transmission_names, usually nameless and within the same unit definition file or included from a Serialized Unit Include (.sui) type file. This is used to assign custom names to each gear in automatic and sequential modes (these are overridden by h-shifter pattern definitions). | |
| crawls | uint | 0 | The number of ratios_forward to handle as crawler gears for UI display. (Added in ETS2 1.27.2) |