X velocity in Unity2D c#

Question

I'm new to C# and Unity. I need to normalize the velocity of my player, but only in the x-direction. My current code is

void Update ()
{
if(rb2d.velocity.magnitude > maxSpeed)
    {
        rb2d.velocity = rb2d.velocity.normalized * maxSpeed;
    }

This controls all velocity. I tried

void Update ()
{
if(rb2d.velocity.x.magnitude > maxSpeed)
    {
        rb2d.velocity.x = rb2d.velocity.x.normalized * maxSpeed;
    }

But I think this was removed in Unity 5. What can I do?

i don't know much about unity, but i do know maths. You can normalize a vector by dividing the x and y components by the length of the vector — DennisVA
– DennisVA, Commented Apr 19, 2018 at 15:12
I tried that, but that's not really the issue, mainly because the max speed is the issue. But thanks — user9553863
– user9553863, Commented Apr 19, 2018 at 15:14

Swift · Accepted Answer · 2018-04-19 15:19:23Z

2

Just divide your velocity X by the velocity's magnitude, which is essentially what normalize does.

// Make a copy of the current velocity.
Vector2 velocity = rb2d.velocity;

// Divide the x component by magnitude, equivalent to normalizing it.
velocity.x = velocity.x / velocity.magnitude;

// velocity now only has its x component normalized and y untouched
rb2d.velocity = velocity * maxSpeed;

answered Apr 19, 2018 at 15:19

Swift

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2 Comments

user9553863 Over a year ago

I don't fully understand how I can implement this. I put that in the if statement. and it's saying XVelocity doesn't exist in current context.

Draco18s no longer trusts SE Over a year ago

@Zanolon well, XVelocity doesn't exist in this answer either, so it's clearly something you added.

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