Surface Preset
SurfacePreset
tells the VehicleController
which settings to use for which surface.
This determines tire friction, the look of effects such as skidmarks and particle effects. It also changes sounds to match the surface.
Once set up, SurfacePreset
can be used for different terrains, scenes or even across games since SurfacePresets
do not carry any scene-specific fields.
Setup
- Right click on empty space in Project window and select
Create ⇒ NWH Vehicle Physics ⇒ Surface Preset
. This will create a newSurfacePreset
ScriptableObject
in the current directory. - Assign a name to it for easier debugging later.
Friction
- Assign a
Friction Preset
. This is aScriptableObject
with settings for tire friction so thatWheelController
can adjust its behavior according to the surface type. With asset come multipleFriction Preset
s so just pick one of those for now.
Skidmarks
- Adjust skidmark settings according to the surface type. More about skidmark settings on Skidmarks page.
Skidmark Material
will be used on generated skidmarks while the wheel is on this surface type.Slip Factor
determines if the skidmarks are slip dependent. On soft surfaces such as sand this value should be 0 as the skidmarks/thread-marks should always be visible, no matter the slip. On hard surfaces such as asphalt skidmarks are only visible when there is wheel slip.
Dust/Smoke Particles
ParticleType
-Smoke
should be used for hard surfaces (asphalt, concrete),Dust
for dusty surfaces (gravel, sand). The difference between the two is in the way the emission rates are calculated. IfSmoke
is selected this will be related to the wheel slip while it will depend on vehicle speed forDust
.Particle Life Distance
is used to calculateParticleSystem
'sStart Lifetime
. The faster the vehicle is going the shorter the lifetime of the particles will be.Max Particle Emission Rate Over Distance
determines amount of particles emitted over distance of one meter.Max Particle Lifetime
determines the absolute maximum time a particle can be alive. When still this value determines how long the particle lives. When movingParticle Life Distance
is used instead.
Chunk Particles
Chunk particles represent pieces of dirt, debris, sand or pebbles thrown behind the tire when there is wheel spin.
Depending on speed the lifetime of a a particle is calculated from Max Chunk Lifetime
(when near still) or Chunk Life Distance
(when moving).
Sounds
SkidSound
andSurfaceSound
settings are used to setWheelSkidComponent
andWheelTireNoiseComponent
SoundComponents values for current surface.