---
title: 未命名
date: 2025-04-06 12:14:25
excerpt: 
tags: 
rating: ⭐
---
# 前言
- UE4.27:https://dev.epicgames.com/documentation/zh-cn/unreal-engine/vehicle-user-guide?application_version=4.27
- UE5.4:https://dev.epicgames.com/documentation/en-us/unreal-engine/vehicles-in-unreal-engine?application_version=5.4

# 项目结构
- Vehicle蓝图
	- Vehicle SkeletalMesh
		- Physics Asset
	- Vehicle动画资产
	- 多个Wheel Blueprints.
	- TireConfig Data Asset

Vehicle c++项目：
- AWheeledVehiclePawn -> AVehiclePawn
	- AVehicleOffroadCar
	- AVehicleSportsCar
- 

# c++ Vehicle Template
## AVehiclePawn
父类为`AWheeledVehiclePawn` -> `APawn`。`AVehiclePawn`的其他派生类为（C++模版实现类）：
- AVehicleOffroadCar：越野车
- AVehicleSportsCar：跑车

## UVehicleWheelFront（前轮）& UVehicleWheelRear（后轮）
父类为`UChaosVehicleWheel`。两者的差别是：
- 轴向类型不同。
- 前轮的转向角度为40度，默认为50度。
- 前轮的bAffectedBySteering为true，即受到转向系统影响。
- 后轮的bAffectedByHandbrake、bAffectedByEngine为true，即受到刹车与发动机影响。
```c++
UVehicleWheelFront::UVehicleWheelFront()  
{  
    AxleType = EAxleType::Front;  
    bAffectedBySteering = true;  
    MaxSteerAngle = 40.f;  
}
```

```c++
UVehicleWheelRear::UVehicleWheelRear()  
{  
    AxleType = EAxleType::Rear;  
    bAffectedByHandbrake = true;  
    bAffectedByEngine = true;  
}
```

### UVehicleSportsWheel
```c++
UVehicleSportsWheelFront::UVehicleSportsWheelFront()  
{  
    WheelRadius = 39.0f;  
    WheelWidth = 35.0f;  
    FrictionForceMultiplier = 3.0f;//摩擦力系数  
  
    MaxBrakeTorque = 4500.0f;//最大制动扭矩  
    MaxHandBrakeTorque = 6000.0f;//最大手制动扭矩
}

UVehicleSportsWheelRear::UVehicleSportsWheelRear()  
{  
    WheelRadius = 40.f;  
    WheelWidth = 40.0f;  
    FrictionForceMultiplier = 4.0f;
    SlipThreshold = 100.0f;//滑动阈值  
    SkidThreshold = 100.0f;//防滑阈值  
    MaxSteerAngle = 0.0f;//最大转向角  
    MaxHandBrakeTorque = 6000.0f;
}
```

### UVehicleOffroadWheel
```c++
UVehicleOffroadWheelFront::UVehicleOffroadWheelFront()  
{  
    WheelRadius = 50.0f;  
    CorneringStiffness = 750.0f;//转弯刚度  
    FrictionForceMultiplier = 4.0f;  
    bAffectedByEngine = true;//实现4轮驱动  
  
    SuspensionMaxRaise = 20.0f;//悬挂架最大提升高度(父类是10.0)
    SuspensionMaxDrop = 20.0f;//悬挂力最大下降(父类是10.0)
    WheelLoadRatio = 1.0f;//车轮负载率(父类是0.5)
    SpringRate = 100.0f;//弹簧率(父类是250.0) 
    SpringPreload = 100.0f;//弹簧预紧力(父类是50.0) 
    SweepShape = ESweepShape::Shapecast;  
  
    MaxBrakeTorque = 3000.0f;  
    MaxHandBrakeTorque = 6000.0f;  
}

UVehicleOffroadWheelRear::UVehicleOffroadWheelRear()  
{  
    WheelRadius = 50.f;  
    CorneringStiffness = 750.0f;  
    FrictionForceMultiplier = 4.0f;  
    SuspensionMaxRaise = 20.0f;  
    SuspensionMaxDrop = 20.0f;  
    WheelLoadRatio = 1.0f;  
    SpringRate = 100.0f;  
    SpringPreload = 100.0f;  
    SweepShape = ESweepShape::Shapecast;  
  
    MaxBrakeTorque = 3000.0f;  
    MaxHandBrakeTorque = 6000.0f;  
}
```

## AVehiclePlayerController
父类为APlayerController。

1. 添加UI与UI更新逻辑。
2. 绑定增强输入组件。
3. OnPossess()绑定AVehiclePawn。

## UChaosWheeledVehicleMovementComponent


## 动画蓝图中的相关逻辑