koobas.hobune.stream
How do I make the player jump at a fixed height?
I've been tinkering with the code, but I can't find anything that works. I'm making a 3D game, and writing in C#. Here's the code that I have now.
public class PlayerController : MonoBehaviour {
public float speed;
public float jumpHeight;
private Rigidbody rb;
void Start ()
{
//Got too lazy, so added this in.
rb = GetComponent<Rigidbody>();
}
void FixedUpdate ()
{
//Movement on the X and Z axes
float moveHorizontal = Input.GetAxis ("Horizontal");
float moveVertical = Input.GetAxis ("Vertical");
Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);
rb.AddForce (movement * speed);
// The Jump Code
if (Input.GetKeyDown (KeyCode.Space))
{
Vector3 jump =new Vector3 (moveHorizontal, jumpHeight, moveVertical);
rb.AddForce (jump);
}
}
}
Now what? I want to do this in the shortest and the most efficient way possible, without using too many variables.
First suggestion, don't use AddForce for movement, it's basically the worst thing you can do to move a player. Use Velocity. After that, you can literally just AddForce to jump like this.
rb.AddForce(transform.up * jumpHeight);
Or you can incorporate it into your velocity mechanism and scale or lerp the height over time to smooth it out. Also you need to smooth your movement out a bit. I wrote a tutorial on this, you can find it here. Proper Velocity-Based Movement 101
if your game is 3d and Y is up, this should get you moving:
public class PlayerController : MonoBehaviour {
public float speed;
public float jumpHeight;
private Rigidbody rb;
void Start ()
{
//Got too lazy, so added this in.
rb = GetComponent<Rigidbody>();
}
void FixedUpdate ()
{
//Movement on the X and Z axes
float moveHorizontal = Input.GetAxis ("Horizontal");
float moveVertical = Input.GetAxis ("Vertical");
Vector3 movement = new Vector3 (moveHorizontal, rb.velocity.y, moveVertical);
rb.velocity=movement*speed;
// The Jump Code
if (Input.GetKeyDown (KeyCode.Space))
{
rb.AddForce (Vector3.up*jumpHeight);
}
}
}
The movement is good, but when I jump, it seems to teleport to a higher location and descend slowly, as if there was no gravity at all.
