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using UnityEngine ;
#if ENABLE_INPUT_SYSTEM
using UnityEngine.InputSystem ;
#endif
namespace StarterAssets
{
[RequireComponent(typeof(CharacterController))]
#if ENABLE_INPUT_SYSTEM
[RequireComponent(typeof(PlayerInput))]
#endif
public class FirstPersonController : MonoBehaviour
{
[Header("Player")]
[Tooltip("Move speed of the character in m/s")]
public float MoveSpeed = 4.0f ;
[Tooltip("Sprint speed of the character in m/s")]
public float SprintSpeed = 6.0f ;
[Tooltip("Rotation speed of the character")]
public float RotationSpeed = 1.0f ;
[Tooltip("Acceleration and deceleration")]
public float SpeedChangeRate = 10.0f ;
[Space(10)]
[Tooltip("The height the player can jump")]
public float JumpHeight = 1.2f ;
[Tooltip("The character uses its own gravity value. The engine default is -9.81f")]
public float Gravity = - 15.0f ;
[Space(10)]
[Tooltip("Time required to pass before being able to jump again. Set to 0f to instantly jump again")]
public float JumpTimeout = 0.1f ;
[Tooltip("Time required to pass before entering the fall state. Useful for walking down stairs")]
public float FallTimeout = 0.15f ;
[Header("Player Grounded")]
[Tooltip("If the character is grounded or not. Not part of the CharacterController built in grounded check")]
public bool Grounded = true ;
[Tooltip("Useful for rough ground")]
public float GroundedOffset = - 0.14f ;
[Tooltip("The radius of the grounded check. Should match the radius of the CharacterController")]
public float GroundedRadius = 0.5f ;
[Tooltip("What layers the character uses as ground")]
public LayerMask GroundLayers ;
[Header("Cinemachine")]
[Tooltip("The follow target set in the Cinemachine Virtual Camera that the camera will follow")]
public GameObject CinemachineCameraTarget ;
[Tooltip("How far in degrees can you move the camera up")]
public float TopClamp = 90.0f ;
[Tooltip("How far in degrees can you move the camera down")]
public float BottomClamp = - 90.0f ;
// cinemachine
private float _cinemachineTargetPitch ;
// player
private float _speed ;
private float _rotationVelocity ;
private float _verticalVelocity ;
private float _terminalVelocity = 53.0f ;
// timeout deltatime
private float _jumpTimeoutDelta ;
private float _fallTimeoutDelta ;
#if ENABLE_INPUT_SYSTEM
private PlayerInput _playerInput ;
#endif
private CharacterController _controller ;
private StarterAssetsInputs _input ;
private GameObject _mainCamera ;
private const float _threshold = 0.01f ;
private bool IsCurrentDeviceMouse
{
get
{
#if ENABLE_INPUT_SYSTEM
return _playerInput . currentControlScheme = = "KeyboardMouse" ;
#else
return false ;
#endif
}
}
private void Awake ( )
{
// get a reference to our main camera
if ( _mainCamera = = null )
{
_mainCamera = GameObject . FindGameObjectWithTag ( "MainCamera" ) ;
}
}
private void Start ( )
{
_controller = GetComponent < CharacterController > ( ) ;
_input = GetComponent < StarterAssetsInputs > ( ) ;
#if ENABLE_INPUT_SYSTEM
_playerInput = GetComponent < PlayerInput > ( ) ;
#else
Debug . LogError ( "Starter Assets package is missing dependencies. Please use Tools/Starter Assets/Reinstall Dependencies to fix it" ) ;
#endif
// reset our timeouts on start
_jumpTimeoutDelta = JumpTimeout ;
_fallTimeoutDelta = FallTimeout ;
}
private void Update ( )
{
JumpAndGravity ( ) ;
GroundedCheck ( ) ;
Move ( ) ;
}
private void LateUpdate ( )
{
CameraRotation ( ) ;
}
private void GroundedCheck ( )
{
// set sphere position, with offset
Vector3 spherePosition = new Vector3 ( transform . position . x , transform . position . y - GroundedOffset , transform . position . z ) ;
Grounded = Physics . CheckSphere ( spherePosition , GroundedRadius , GroundLayers , QueryTriggerInteraction . Ignore ) ;
}
private void CameraRotation ( )
{
// if there is an input
if ( _input . look . sqrMagnitude > = _threshold )
{
//Don't multiply mouse input by Time.deltaTime
float deltaTimeMultiplier = IsCurrentDeviceMouse ? 1.0f : Time . deltaTime ;
_cinemachineTargetPitch + = _input . look . y * RotationSpeed * deltaTimeMultiplier ;
_rotationVelocity = _input . look . x * RotationSpeed * deltaTimeMultiplier ;
// clamp our pitch rotation
_cinemachineTargetPitch = ClampAngle ( _cinemachineTargetPitch , BottomClamp , TopClamp ) ;
// Update Cinemachine camera target pitch
CinemachineCameraTarget . transform . localRotation = Quaternion . Euler ( _cinemachineTargetPitch , 0.0f , 0.0f ) ;
// rotate the player left and right
transform . Rotate ( Vector3 . up * _rotationVelocity ) ;
}
}
private void Move ( )
{
// set target speed based on move speed, sprint speed and if sprint is pressed
float targetSpeed = _input . sprint ? SprintSpeed : MoveSpeed ;
// a simplistic acceleration and deceleration designed to be easy to remove, replace, or iterate upon
// note: Vector2's == operator uses approximation so is not floating point error prone, and is cheaper than magnitude
// if there is no input, set the target speed to 0
if ( _input . move = = Vector2 . zero ) targetSpeed = 0.0f ;
// a reference to the players current horizontal velocity
float currentHorizontalSpeed = new Vector3 ( _controller . velocity . x , 0.0f , _controller . velocity . z ) . magnitude ;
float speedOffset = 0.1f ;
float inputMagnitude = _input . analogMovement ? _input . move . magnitude : 1f ;
// accelerate or decelerate to target speed
if ( currentHorizontalSpeed < targetSpeed - speedOffset | | currentHorizontalSpeed > targetSpeed + speedOffset )
{
// creates curved result rather than a linear one giving a more organic speed change
// note T in Lerp is clamped, so we don't need to clamp our speed
_speed = Mathf . Lerp ( currentHorizontalSpeed , targetSpeed * inputMagnitude , Time . deltaTime * SpeedChangeRate ) ;
// round speed to 3 decimal places
_speed = Mathf . Round ( _speed * 1000f ) / 1000f ;
}
else
{
_speed = targetSpeed ;
}
// normalise input direction
Vector3 inputDirection = new Vector3 ( _input . move . x , 0.0f , _input . move . y ) . normalized ;
// note: Vector2's != operator uses approximation so is not floating point error prone, and is cheaper than magnitude
// if there is a move input rotate player when the player is moving
if ( _input . move ! = Vector2 . zero )
{
// move
inputDirection = transform . right * _input . move . x + transform . forward * _input . move . y ;
}
// move the player
_controller . Move ( inputDirection . normalized * ( _speed * Time . deltaTime ) + new Vector3 ( 0.0f , _verticalVelocity , 0.0f ) * Time . deltaTime ) ;
}
private void JumpAndGravity ( )
{
if ( Grounded )
{
// reset the fall timeout timer
_fallTimeoutDelta = FallTimeout ;
// stop our velocity dropping infinitely when grounded
if ( _verticalVelocity < 0.0f )
{
_verticalVelocity = - 2f ;
}
// Jump
if ( _input . jump & & _jumpTimeoutDelta < = 0.0f )
{
// the square root of H * -2 * G = how much velocity needed to reach desired height
_verticalVelocity = Mathf . Sqrt ( JumpHeight * - 2f * Gravity ) ;
}
// jump timeout
if ( _jumpTimeoutDelta > = 0.0f )
{
_jumpTimeoutDelta - = Time . deltaTime ;
}
}
else
{
// reset the jump timeout timer
_jumpTimeoutDelta = JumpTimeout ;
// fall timeout
if ( _fallTimeoutDelta > = 0.0f )
{
_fallTimeoutDelta - = Time . deltaTime ;
}
// if we are not grounded, do not jump
_input . jump = false ;
}
// apply gravity over time if under terminal (multiply by delta time twice to linearly speed up over time)
if ( _verticalVelocity < _terminalVelocity )
{
_verticalVelocity + = Gravity * Time . deltaTime ;
}
}
private static float ClampAngle ( float lfAngle , float lfMin , float lfMax )
{
if ( lfAngle < - 360f ) lfAngle + = 360f ;
if ( lfAngle > 360f ) lfAngle - = 360f ;
return Mathf . Clamp ( lfAngle , lfMin , lfMax ) ;
}
private void OnDrawGizmosSelected ( )
{
Color transparentGreen = new Color ( 0.0f , 1.0f , 0.0f , 0.35f ) ;
Color transparentRed = new Color ( 1.0f , 0.0f , 0.0f , 0.35f ) ;
if ( Grounded ) Gizmos . color = transparentGreen ;
else Gizmos . color = transparentRed ;
// when selected, draw a gizmo in the position of, and matching radius of, the grounded collider
Gizmos . DrawSphere ( new Vector3 ( transform . position . x , transform . position . y - GroundedOffset , transform . position . z ) , GroundedRadius ) ;
}
}
}
