private void Update()
{
// Collision info
CharacterPhysics2D.CollisionInfo col = Physics.Collisions;
// 0 vertical velocity when character is squeezed between a floor and ceiling
if ((col.above) || (col.below))
{
velocity.y = 0;
}
// Jumping
if (jumpActivated && col.below)
{
velocity.y = jumpVelocity;
// Jumping sound
if (jumpSounds.Count > 0)
{
audio.PlayOneShot(jumpSounds[Random.Range(0, jumpSounds.Count)]);
}
}
Vector2 input = DirectionalInput;
// Walking sound
if (input.x != 0 && col.below)
{
if (!walkingAudio.isPlaying)
{
walkingAudio.Play();
}
}
else
{
walkingAudio.Stop();
}
// Horizontal velocity smoothing (if no player input is detected)
targetVelX = input.x * moveSpeed;
if (input.x == 0)
{
velocity.x = Mathf.SmoothDamp(velocity.x, targetVelX, ref velXSmoothing, xVelocitySmoothTime);
}
else
{
velocity.x = targetVelX;
}
// Gravity
velocity += gravityScale * Physics2D.gravity * Time.deltaTime;
// Move the character
Physics.Velocity = velocity;
// Clear flags
jumpActivated = false;
}
void DecisionFSM()
{
distance = Vector3.Distance(transform.position, target.transform.position);
float xDist = Mathf.Abs(target.position.x - transform.position.x);
switch (currentAIState)
{
case AIState.Patrolling:
// Movement
velocity.x = movingRight ? patrolSpeed : -patrolSpeed;
anim.SetBool("Walking", true);
// Flip movement direction at walls
CharacterPhysics2D.CollisionInfo col = controller.Collisions;
if (col.below)
{
velocity.y = 0;
}
if ((col.right || transform.position.x > patrolMaxX) && movingRight)
{
movingRight = false;
}
else if ((col.left || transform.position.x < patrolMinX) && !movingRight)
{
movingRight = true;
}
FaceMovementDir();
// Next state
if (distance < wakeRange)
{
currentAIState = AIState.Chasing;
}
break;
case AIState.Chasing:
// Chase player as long as player is in range
if (ExclusiveBetween(xDist, 0.1f, wakeRange))
{
velocity.x = (transform.position.x < target.position.x) ? chaseSpeed : -chaseSpeed;
anim.SetBool("Walking", true);
}
else
{
velocity.x = 0;
anim.SetBool("Walking", false);
}
FaceMovementDir();
// Next state
if (xDist >= wakeRange)
{
currentAIState = AIState.Patrolling;
}
else if (xDist < startAttackingDistance)
{
currentAIState = AIState.Attacking;
}
break;
case AIState.Attacking:
velocity.x = 0;
anim.SetBool("Walking", false);
// Attack the player
AttackFSM();
FaceTarget();
// Next state
if (distance >= stopChaseDistance)
{
currentAIState = AIState.Chasing;
}
break;
default:
currentAIState = AIState.Patrolling;
break;
}
}
void Update()
{
// Player input
float xInput = Input.GetAxisRaw("Horizontal");
float yInput = Input.GetAxisRaw("Vertical");
bool jumpPressed = Input.GetKeyDown(KeyCode.Space);
Vector2 input = new Vector2(xInput, yInput);
// Collision info
CharacterPhysics2D.CollisionInfo col = physics.Collisions;
// 0 vertical velocity when character is squeezed between a floor and ceiling
if ((col.above) || (col.below))
{
velocity.y = 0;
}
// Jumping
if (jumpPressed && col.below)
{
velocity.y = JumpVelocity;
anim.SetTrigger("Jump");
}
// Horizontal velocity smoothing (if no player input is detected)
targetVelX = input.x * MoveSpeed;
if (input.x == 0)
{
velocity.x = Mathf.SmoothDamp(velocity.x, targetVelX, ref velXSmoothing, XVelocitySmoothTime);
}
else
{
velocity.x = targetVelX;
}
// Gravity
velocity += gravityScale * Physics2D.gravity * Time.deltaTime;
// Move the character
physics.Velocity = velocity;
// Attack logic
switch (attackState)
{
case (AttackState.ATTACKING):
if (attackTimer > 0)
{
attackTimer -= Time.deltaTime;
}
else
{
attackTrigger.enabled = false;
attackState = AttackState.NOT_ATTACKING;
}
break;
case (AttackState.NOT_ATTACKING):
if (Input.GetKeyDown(KeyCode.F))
{
attackTimer = attackDuration;
attackTrigger.enabled = true;
attackState = AttackState.ATTACKING;
}
break;
default:
break;
}
// Attack animation
anim.SetBool("Attacking", attackState == AttackState.ATTACKING);
}