UNITY | PROJECT | SPACE SHOOTER 2D | 2. Player Input Movement

SPACE SHOOTER 2D

2. Player Input Movement

Player Control Script

• Creating & Adding “PlayerControl” script

Player Control Script | Update() | Input.GetAxisRaw()

• setting “speed” variable as public to see in the inspector
• In “Update()”
  • set horizontal & vertical input by using Input.GetAxisRaw()
    • with Input.GetAxisRaw(), the values will be -1, 0 or 1
  • with the two inputs, make “direction”
    • by adding “.normalize”, make a unit vector
  • add a customized fuction “Move()” to move “Player”
    • we need this fuction in “Update()” because “Player”‘s position must be changed and detected every frame

 

Player Control script | Move() | Vector2 | Camera.main.ViewportToWorldPoint()

• to limit the Filed where “Player” can move, get the screen size by using “Camera.main.ViewportToWorldPoint()”
  • ViewPort has a range (0, 0) to (1, 1)

 

Player Control script | Move() | transform.position | Mathf.Clamp()

• get the Player’s current position with “transform.position”
  • transform.position of the gameObject this script is attached to
• calculate the new position in “currentPosition” variable
  • with “speed” variable, we can change the speed of “Player”
    • “direction” is the normalized vector2
    • “Time.deltaTime” is very important with this, we smooth the movement

without “Time.deltaTime”, the value(“direction”) is almost (0, 0), (1, 0)……

 

Setting Player’s Speed | Public Variable

 

Player Input Movement

Player Input Movement | without Time.deltatime

• without “Time.deltaTime”, “Player” moves too dynamically