C# Jumping Issue

Questions & Answers
1

I’ve created a basic script for a 3rd person character controller and it works perfectly except for one issue with jumping. No matter what I set the jumpSpeed variable to, the character jumps only about .2 in the y axis.

Here’s the code:

using UnityEngine;
using System.Collections;

public class SpartanController : MonoBehaviour {
	
	public int horizontalSpeed = 1;
	public int verticalSpeed = 1;
	
	public int rotationSpeed = 20;
	
	public int jumpSpeed = 100;
	public float gravity = 14.0F;
	
	private Vector3 moveDirection = Vector3.forward;
	private CharacterController controller;
	
	void Update()
	{
		controller = gameObject.GetComponent();
		
		if (controller.isGrounded)
		{
			// fully control character
			float horizontalDirection = Input.GetAxis("Horizontal") * horizontalSpeed;
			float forwardDirection = Input.GetAxis("Vertical") * verticalSpeed;
			moveDirection = new Vector3(horizontalDirection, 0, forwardDirection);
			
			// get jump event
			if (Input.GetButton("Jump"))
			{
				moveDirection.y = jumpSpeed;
			}
		}
		else
		{
			// less control over character, gravity applied
			float horizontalDirection = Input.GetAxis("Horizontal") * horizontalSpeed / 2;
			float forwardDirection = Input.GetAxis("Vertical") * verticalSpeed / 2;
			moveDirection = new Vector3(horizontalDirection, moveDirection.y, forwardDirection);
		
			moveDirection.y -= gravity * Time.deltaTime;
		}
		moveDirection *= Time.deltaTime;
		
		if (moveDirection.magnitude > 0.05)
		{
			transform.LookAt(transform.position + new Vector3(moveDirection.x, 0, moveDirection.z));
		}
		
		controller.Move(moveDirection);
	}
}
2

I suspect the problem is this line:

  moveDirection *= Time.deltaTime;

It’s killing the vertical speed in a few updates. Eliminate this line and multiply moveDirection by Time.deltaTime inside Move:

  // multiply by Time.deltaTime here:
  controller.Move(moveDirection * Time.deltaTime);