Character Diagonal Movement Issue

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I've made a movement script + jumping but it seems like when I move diagonally (W + D/A) or (S + D/A) my character moves twice as fast as normal. I get it's because in the script I've done:

 moveDirection *= speed;

So it basically multiplies the moveDirection by speed, but when I press 2 keys like W and D I think it kinda multiplies both of the keys or the directions so it equals to twice as much as normal. How do I fix this? Or maybe I'm just seeing things and I'm actually moving normally? Thanks in advance :P

Answer 1

Best Answer

Answer by AlwaysSunny · Dec 28, 2016 at 02:47 PM

You should normalize the input vector. Like so...

 float h = Input.GetAxis("Horizontal");
 float v = Input.GetAxis("Vertical");
 Vector3 inputVector = new Vector2( h, 0, v );
 inputVector.Normalize();

Then multiply it by your desired speed and use that to move the character.
This will correct the issue.

Think of it like this: Without normalization, the input vector fits into a square. The corners of a square are further from the center than the middle of the edges are. Normalizing "chops off" the excess, so the final input vector fits into a circle, making the vector a uniform length no matter what direction it's pointing.

Best,

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UnityCoach · Dec 28, 2016 at 06:51 PM 3

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Using Vector3.Normalize() will result in a Length that is always equal to one. Thus preventing subtle motion when using Joysticks or Mouse for example. I'd recommend using ClampMagnitude ins$$anonymous$$d.

AlwaysSunny UnityCoach · Dec 28, 2016 at 09:59 PM 0

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Excellent point! Saw WASD and forgot about Clamping. :)

UnityCoach AlwaysSunny · Dec 28, 2016 at 10:15 PM 0

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Been there :)

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Answer 2

Answer by Tronline · Dec 28, 2016 at 02:57 PM

@AlwaysSunny Oh ok! I get it now, thanks!

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AlwaysSunny · Dec 31, 2016 at 05:50 PM 0

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Addressing your comment about clamping here, because UA only lets you reply so many levels deep.

You should use ClampMagnitude ins$$anonymous$$d of normalizing. Replace

 moveDirection.Normalize();

with

 moveDirection = Vector3.ClampMagnitude(moveDirection, 1);

Tronline · Dec 31, 2016 at 06:29 PM 0

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Thanks so much :D

Answer 3

Answer by IntergalacticSloth · May 18, 2018 at 05:52 AM

Also discussed here https://answers.unity.com/questions/639075/using-move-the-enemy-moves-faster-at-a-diagonal.html

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Character Diagonal Movement Issue

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