Katie Cookie

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Nudge tdu2 overall car handling to your own liking, along with force feedback tweaks

https://github.com/Kethen/tdu2_physics_tweaks

Video demo of the example config below, speedometer is in kph (Streamable)

Video demo of the adjustable steering wheel mode (Streamable), enabled by setting "steering_wheel_mode" to true

Place dinput8.dll, MinHook.x86.dll, tdu2_physics_tweaks_config.json, dinput8_ffb_tweaks_i686.dll and tdu2_physics_tweaks_i686.asi next to TestDrive2.exe.

Installation on Linux+WINE

Copy the file next to TestDrive2.exe following the Windows instruction.

After that you'd likely also have to declare a dll override before the asi loader as dinput8.dll will be picked up. It can be done in winecfg or with the below environment variable.

export WINEDLLOVERRIDES="dinput8=n,b"

Alternatively, if you are already using dxvk, chances are you have a d3d9.dll override ready to go. Simply install dinput8.dll as d3d9.dll instead.

After installation, edit tdu2_physics_tweaks_config.json to nudge the game closer to your taste.

Some values can be adjusted while the game is running. Check the in-json string comments for when values are applied.

The following examples adjusts vanilla cars to feel somewhere between tdu2 and tdu1 hc. Time trials and license tests will become relatively more challenging.

---

Controller Hardcore Lite Example

{
	"only_modify_player_vehicle":true,
	"allow_road_cars_on_dirt": true,
	"overrides":{
		"d1":"changes gravity constant, applies once on game start",
		"gravity":-9.81,

		"d2":"overrides extra gravity values in Physics.cpr, applies on change. set to 0 to remove extra downforce when airborne",
		"min_extra_gravity":0.0,
		"max_extra_gravity":0.0,
		"extra_gravity_accel_duration":0.1,
		"extra_gravity_accel_delay":0.1,

		"d3":"beta, disabling abs and tcs, weird to do in tdu2, let me know how each item feels",
		"abs_off":true,
		"tcs_off":true,
		"hand_brake_abs_off":true,

		"d4":"override angular damping values in Physics.cpr, higher values means more resistance to rotations (both turning and rolling), applies on car spawn/change",
		"override_angular_damping":true,
		"new_angular_damping":0.0,

		"d5":"steering wheel mode like in tdu1, values overrides only applies when enabled, applies on car spawn/change",
		"steering_wheel_mode":false,
		"steering_velocity":900.0,
		"steering_max_angle":40.0,

		"d6":"analog settings (controller configuration), applies on change",
		"override_analog_settings":false,
		"d7":"strength of damper and spring effects, more than 1.0 will cause clipping",
		"ffb_strength":1.0,
		"d8":"strength of sine effects, happens during surface change, driving offroad, and redlining",
		"ffb_vibration":0.5,
		"steering_sensitivity":0.25,
		"steering_speed_factor":0.0,
		"steering_damping":0.0,
		"steering_deadzone":0.0,
		"clutch_linearity":0.5,
		"throttle_linearity":0.5,
		"brake_linearity":0.5
	},
	"multipliers":{
		"d1":"multiply some values available in tdu2vpe during load, applies on car spawn/change",
		"suspension_length_front":1.0,
		"suspension_length_rear":1.0,
		"spring_front":0.75,
		"spring_rear":0.75,
		"dampers_front":0.75,
		"dampers_rear":0.75,
		"ride_height_front":1.0,
		"ride_height_rear":1.0,
		"anti_roll_bar_front":2.5,
		"anti_roll_bar_rear":2.5,
		"anti_roll_bar_damping_front":0.5,
		"anti_roll_bar_damping_rear":0.5,
		"lift_drag_ratio":1.0,
		"down_force_velocity":1.0,
		"down_force_front":1.0,
		"down_force_rear":1.0,
		"lateral_grip_front":0.65,
		"lateral_grip_rear":0.65,
		"grip_front":0.7,
		"grip_rear":0.7,
		"brake_power":1.0
	},
	"ffb_tweaks": {
		"d1":"force feedback tweaks, applies on change",
		"enabled": false,
		"d2":"to log all effects sent to dinput8 or not",
		"log_effects": false,
		"d3":"reduce damper effect as the car go faster more than the game originally does, how it feels depends on how your wheel renders damper effect",
		"reduce_damper": false,
		"d4":"adjust spring effect begin and end force scaled on car speed, 0-10000, more than 10000 will cause clipping",
		"spring_effect_max": 10000,
		"spring_effect_min": 6500
	}
}

{
	"only_modify_player_vehicle":true,
	"allow_road_cars_on_dirt": true,
	"overrides":{
		"d1":"changes gravity constant, applies once on game start",
		"gravity":-9.81,

		"d2":"overrides extra gravity values in Physics.cpr, applies on change. set to 0 to remove extra downforce when airborne",
		"min_extra_gravity":0.0,
		"max_extra_gravity":0.0,
		"extra_gravity_accel_duration":0.1,
		"extra_gravity_accel_delay":0.1,

		"d3":"beta, disabling abs and tcs, weird to do in tdu2, let me know how each item feels",
		"abs_off":true,
		"tcs_off":true,
		"hand_brake_abs_off":true,

		"d4":"override angular damping values in Physics.cpr, higher values means more resistance to rotations (both turning and rolling), applies on car spawn/change",
		"override_angular_damping":true,
		"new_angular_damping":0.0,

		"d5":"steering wheel mode like in tdu1, values overrides only applies when enabled, applies on car spawn/change",
		"steering_wheel_mode":true,
		"steering_velocity":900.0,
		"steering_max_angle":40.0,

		"d6":"analog settings (controller configuration), applies on change",
		"override_analog_settings":true,
		"d7":"strength of damper and spring effects, more than 1.0 will cause clipping",
		"ffb_strength":1.0,
		"d8":"strength of sine effects, happens during surface change, driving offroad, and redlining",
		"ffb_vibration":0.5,
		"steering_sensitivity":0.25,
		"steering_speed_factor":0.0,
		"steering_damping":0.0,
		"steering_deadzone":-0.05,
		"clutch_linearity":0.5,
		"throttle_linearity":0.5,
		"brake_linearity":0.5
	},
	"multipliers":{
		"d1":"multiply some values available in tdu2vpe during load, applies on car spawn/change",
		"suspension_length_front":1.0,
		"suspension_length_rear":1.0,
		"spring_front":0.75,
		"spring_rear":0.75,
		"dampers_front":0.75,
		"dampers_rear":0.75,
		"ride_height_front":1.0,
		"ride_height_rear":1.0,
		"anti_roll_bar_front":2.5,
		"anti_roll_bar_rear":2.5,
		"anti_roll_bar_damping_front":0.5,
		"anti_roll_bar_damping_rear":0.5,
		"lift_drag_ratio":1.0,
		"down_force_velocity":1.0,
		"down_force_front":1.0,
		"down_force_rear":1.0,
		"lateral_grip_front":0.65,
		"lateral_grip_rear":0.65,
		"grip_front":0.7,
		"grip_rear":0.7,
		"brake_power":1.0
	},
	"ffb_tweaks": {
		"d1":"force feedback tweaks, applies on change",
		"enabled": true,
		"d2":"to log all effects sent to dinput8 or not",
		"log_effects": false,
		"d3":"reduce damper effect as the car go faster more than the game originally does, how it feels depends on how your wheel renders damper effect",
		"reduce_damper": false,
		"d4":"adjust spring effect begin and end force scaled on car speed, 0-10000, more than 10000 will cause clipping",
		"spring_effect_max": 10000,
		"spring_effect_min": 6500
	}
}

Changed values are logged in tdu2_physics_tweaks_log.txt for db tuning reference.

When log_effects under ffb_tweaks is enabled, effects sent to dinput8 are logged to dinput8_ffb_tweaks_log.txt

Make sure your edited config is a valid json file and contains all the keys this tool needs.

Check tdu2_physics_tweaks_log.txt if the game refuses to start/self closes.

If tdu2_physics_tweaks_log.txt or dinput8_ffb_tweaks_log.txt don't change / don't get created, make sure the directory and the log files are not readonly.

On windows, install cygwin, along with mingw64-i686-gcc-core and mingw64-i686-gcc-g++ toolchains, then run build.sh at the project root in cygwin shell.

On linux, install podman from your package manager then run build_podman.sh.

• TDU2VPE https://turboduck.net/forums/topic/33748-tdu2vpe-release/
  • I would not know where to start at all without TDU2VPE
• tdudec https://aluigi.altervista.org/papers.htm
  • For Physics.cpr encryption and decryption
• Xarlith https://turboduck.net/profile/15055-xarlith/
  • Tips on suspension adjustments
• MeFisto94 https://github.com/MeFisto94 https://turboduck.net/profile/38775-mefisto94/
  • Tips on suspension adjustments

• MinHook https://github.com/TsudaKageyu/minhook
• json https://github.com/nlohmann/json
• Ultimate-ASI-Loader https://github.com/ThirteenAG/Ultimate-ASI-Loader

• override internal steering deadzone for fine steering
• inject vector throttle and brake values for a better RWD experience

• load prx with game, see https://www.ppsspp.org/docs/reference/plugins/ for PPSSPP, see https://consolemods.org/wiki/Vita:Adrenaline#Adding_Plugins for PSVita and https://www.reddit.com/r/PSP/wiki/plugins/ for PSP

• on PPSSPP, throttle is bound to right stick left, brake is bound to right stick down, remap right stick left and down in ppsspp accordingly to your desired throttle and brake control
  • on windows, please use version 1.17 and up
• camera rotation on bumper and cockpit view can additionally be enabled on PPSSPP through the settings file
  • binds to left stick up and down when enabled, remap PPSSPP left stick up and down to your desired camera control inputs accordingly
• on PSVita, throttle is bound to right stick up, brake is bound to right stick down
• on PSP, it only reduces steering deadzones, there is no keybinding

• one can write ms0:/PSP/GTRemastered_settings.txt or ef0:/PSP/GTRemastered_settings.txt to modify the plugin's behavior

<camera control on PPSSPP on/off> <inner analog deadzone 0-127> <outer analog deadzone 0-127>

• eg. enable camera control on PPSSPP, map the start of analog input to 10/127, end of analog input to 117/127

1 10 117

• EU v2.00 (UCES01245 2.00)
• US v2.00 (UCUS98632 2.00)
• JP v1.01 (UCJS10100 1.01)
• ASIA v1.00 (UCAS40265 1.00)

• https://github.com/TheOfficialFloW/RemasteredControls
• https://github.com/albe/joysens
• https://github.com/Freakler/ppsspp-GTARemastered

• https://github.com/kotcrab/ghidra-allegrex for making psp games modding easier
• https://github.com/pspdev , m33 and pro cfw for psp homebrew development tools
• https://github.com/hrydgard/ppsspp for an awesome hle psp

• check the game_tweaks directory of this repository
  
  
   

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If you like this and would like to tip me, feel free to do so at https://ko-fi.com/kethen