if(keydown unity)
using UnityEngine;
using System.Collections;
public class classExample : MonoBehaviour{
// variables:
public float speed;
public bool grounded
public RigidBody rb;
void Update(){
// on button press / key press here:
if(Input.GetKeyDown(keycode.W)){
rb.addForce = new vector3(_, _, _);
// If you want to add a force then put this line of code on one of the "_"'s:
// (speed * Time.deltaTime;)
}
// add more movement here if you need:
// (just remember to change to keycode)
}
private void onCollisionEnter(Collsion, collision){
grounded = true;
}
private void onCollisionExit(Collsion, collision){
grounded = false;
}
}