For the movement script, I wanted the player to move in a continuous motion and not in discreet jumps. The player should also be able to keep moving in one direction holding down a direction button.

To keep track of what the player is doing, I first made an enum with the possible motion states.
I guess the enums are self explanatory

enum Moving
{
    NO,
    UP,
    DOWN,
    LEFT,
    RIGHT
};

Now the the logic. If the player isn’t moving, check for player input.

        if (direction == Moving.NO)
        {
            if (Input.GetKey(KeyCode.A))
            {
                direction = Moving.LEFT;
            }
            if (Input.GetKey(KeyCode.D))
            {
                direction = Moving.RIGHT;
            }
            if (Input.GetKey(KeyCode.W))
            {
                direction = Moving.UP;
            }
            if (Input.GetKey(KeyCode.S))
            {
                direction = Moving.DOWN;
            }
        }

Now if the player is moving, the enum will be holding the direction of motion and we can move the player.

            switch (direction)
            {
                case Moving.UP:
                    if (moveLeft > 0f)
                    {
                        Vector3 v3 = transform.position;
                        v3.y += movementSpeed;
                        moveLeft -= +movementSpeed;
                        if (v3.y > 1f)
                        {
                            v3.y = 1f;
                            moveLeft = 1.0f;
                            direction = Moving.NO;
                        }
                        transform.position = v3;
                    }
                    else
                    {
                        moveLeft = 1.0f;
                        direction = Moving.NO;
                    }
                    break;
                case Moving.DOWN:
                    if (moveLeft > 0f)
                    {
                        Vector3 v3 = transform.position;
                        v3.y -= movementSpeed;
                        moveLeft -= +movementSpeed;
                        if (v3.y < -1f)
                        {
                            v3.y = -1f;
                            moveLeft = 1.0f;
                            direction = Moving.NO;
                        }
                        transform.position = v3;
                    }
                    else
                    {
                        moveLeft = 1.0f;
                        direction = Moving.NO;
                    }
                    break;
                case Moving.LEFT:
                    if (moveLeft > 0f)
                    {
                        Vector3 v3 = transform.position;
                        v3.x -= movementSpeed;
                        moveLeft -= +movementSpeed;
                        if (v3.x < -1f)
                        {
                            v3.x = -1f;
                            moveLeft = 1.0f;
                            direction = Moving.NO;
                        } transform.position = v3;
                    }

                    else
                    {
                        moveLeft = 1.0f;
                        direction = Moving.NO;
                    }
                    break;
                case Moving.RIGHT:
                    if (moveLeft > 0f)
                    {
                        Vector3 v3 = transform.position;
                        v3.x += movementSpeed;
                        moveLeft -= +movementSpeed;
                        if (v3.x > 1f)
                        {
                            v3.x = 1f;
                            moveLeft = 1.0f;
                            direction = Moving.NO;
                        }
                        transform.position = v3;
                    }
                    else
                    {
                        moveLeft = 1.0f;
                        direction = Moving.NO;
                    }
                    break;
                default:
                    break;
            }

That’s it, not pretty but it works. If I have the time, I would like to make the motion even more fluent. The state change if you keep a key down makes the player give a little jump/jitter as the state goes through NO state before returning to a moving state. But for now it gets the job done

All feedback is welcome, I can’t change if I don’t know what to change.

– Henning