How to change Max Walk Speed in C++?

Development Programming & Scripting
1

Hello.
I made a simple Player Class and I want to add sprint mechanic.
I already binded it to functions called “StartSprint” and “StopSprint”, so my question is what’s the name of the variable or function that controls Max Walk Speed.

2

Check out the character movement actor component… That has all sorts of stuff (like walking) that will assist… Here’s the documentation. UCharacterMovementComponent | Unreal Engine Documentation

3

It’s “MaxWalkSpeed” of “UCharacterMovementComponent”.

4

Ok, but how do I write it? What’s the name of the default UCharacterMovementComponent?

5

Try this…

http://droneah.com/content/ue4-getting-sprint-work-c

6

Check the answer by @teak421. But replace in code -&gt with -> (hope that will be obvious).

7

When I do what you’re saying it gives me an error:

124306-err.png
124306-err.png1230×65 15.9 KB

8

Don’t know how You managed to do that, since MaxWalkSpeed is public variable.

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9

The UCharacterMovementComponent, CharacterMovement, to which MaxWalkSpeed belongs, is private, though. The only way I’ve figured out how to access this directly in my own Character C++ class inheriting from ACharacter is something like this:

Cast(GetMovementComponent())->MaxWalkSpeed = 100.0f;

1 Like
10

You can modify the MaxWalkSpeed through:

UCharacterMovementComponent* CharacterMovement = GetCharacterMovement();

float WalkSpeed = CharacterMovement->MaxWalkSpeed;
CharacterMovement()->MaxWalkSpeed = WalkSpeed*2

11

This solution does not work. There is no function definition.

12

I did it myself on 4.16 and this does work. From where did you try to access MaxWalkSpeed?

13

Put this in your Header:
class UCharacterMovementComponent* CharacterMovement = GetCharacterMovement();

Put this in your Cpp:
#include “GameFramework/CharacterMovementComponent.h”

float WalkSpeed = CharacterMovement->MaxWalkSpeed;
CharacterMovement()->MaxWalkSpeed = WalkSpeed*2;

This works 4.18

14

GetMovementComponent() returns a UPawnMovementComponent, not a UCharacterMovementComponent. To get the character one, you can either cast to it or just call GetCharacterMovement().

And don’t forget to include the header:
#include "GameFramework/CharacterMovementComponent.h"

3 Likes
15

#include “GameFramework/CharacterMovementComponent.h”

	UCharacterMovementComponent *MovementPtr =  Cast<UCharacterMovementComponent>(Character->GetCharacterMovement());


	MovementPtr->MaxWalkSpeed = Speed;

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