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AGL-Week1-Workshop/Assets/CharacterController2D.cs

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+using UnityEngine;
+using UnityEngine.Events;
+
+public class CharacterController2D : MonoBehaviour
+{
+	[SerializeField] private float m_JumpForce = 400f;                          // Amount of force added when the player jumps.
+	[Range(0, 1)] [SerializeField] private float m_CrouchSpeed = .36f;          // Amount of maxSpeed applied to crouching movement. 1 = 100%
+	[Range(0, .3f)] [SerializeField] private float m_MovementSmoothing = .05f;  // How much to smooth out the movement
+	[SerializeField] private bool m_AirControl = false;                         // Whether or not a player can steer while jumping;
+	[SerializeField] private LayerMask m_WhatIsGround;                          // A mask determining what is ground to the character
+	[SerializeField] private Transform m_GroundCheck;                           // A position marking where to check if the player is grounded.
+	[SerializeField] private Transform m_CeilingCheck;                          // A position marking where to check for ceilings
+	[SerializeField] private Collider2D m_CrouchDisableCollider;                // A collider that will be disabled when crouching
+
+	const float k_GroundedRadius = .2f; // Radius of the overlap circle to determine if grounded
+	private bool m_Grounded;            // Whether or not the player is grounded.
+	const float k_CeilingRadius = .2f; // Radius of the overlap circle to determine if the player can stand up
+	private Rigidbody2D m_Rigidbody2D;
+	private bool m_FacingRight = true;  // For determining which way the player is currently facing.
+	private Vector3 m_Velocity = Vector3.zero;
+
+	[Header("Events")]
+	[Space]
+
+	public UnityEvent OnLandEvent;
+
+	[System.Serializable]
+	public class BoolEvent : UnityEvent<bool> { }
+
+	public BoolEvent OnCrouchEvent;
+	private bool m_wasCrouching = false;
+
+	private void Awake()
+	{
+		m_Rigidbody2D = GetComponent<Rigidbody2D>();
+
+		if (OnLandEvent == null)
+			OnLandEvent = new UnityEvent();
+
+		if (OnCrouchEvent == null)
+			OnCrouchEvent = new BoolEvent();
+	}
+
+	private void FixedUpdate()
+	{
+		bool wasGrounded = m_Grounded;
+		m_Grounded = false;
+
+		// The player is grounded if a circlecast to the groundcheck position hits anything designated as ground
+		// This can be done using layers instead but Sample Assets will not overwrite your project settings.
+		Collider2D[] colliders = Physics2D.OverlapCircleAll(m_GroundCheck.position, k_GroundedRadius, m_WhatIsGround);
+		for (int i = 0; i < colliders.Length; i++)
+		{
+			if (colliders[i].gameObject != gameObject)
+			{
+				m_Grounded = true;
+				if (!wasGrounded)
+					OnLandEvent.Invoke();
+			}
+		}
+	}
+
+
+	public void Move(float move, bool crouch, bool jump)
+	{
+		// If crouching, check to see if the character can stand up
+		if (!crouch)
+		{
+			// If the character has a ceiling preventing them from standing up, keep them crouching
+			if (Physics2D.OverlapCircle(m_CeilingCheck.position, k_CeilingRadius, m_WhatIsGround))
+			{
+				crouch = true;
+			}
+		}
+
+		//only control the player if grounded or airControl is turned on
+		if (m_Grounded || m_AirControl)
+		{
+
+			// If crouching
+			if (crouch)
+			{
+				if (!m_wasCrouching)
+				{
+					m_wasCrouching = true;
+					OnCrouchEvent.Invoke(true);
+				}
+
+				// Reduce the speed by the crouchSpeed multiplier
+				move *= m_CrouchSpeed;
+
+				// Disable one of the colliders when crouching
+				if (m_CrouchDisableCollider != null)
+					m_CrouchDisableCollider.enabled = false;
+			}
+			else
+			{
+				// Enable the collider when not crouching
+				if (m_CrouchDisableCollider != null)
+					m_CrouchDisableCollider.enabled = true;
+
+				if (m_wasCrouching)
+				{
+					m_wasCrouching = false;
+					OnCrouchEvent.Invoke(false);
+				}
+			}
+
+			// Move the character by finding the target velocity
+			Vector3 targetVelocity = new Vector2(move * 10f, m_Rigidbody2D.velocity.y);
+			// And then smoothing it out and applying it to the character
+			m_Rigidbody2D.velocity = Vector3.SmoothDamp(m_Rigidbody2D.velocity, targetVelocity, ref m_Velocity, m_MovementSmoothing);
+
+			// If the input is moving the player right and the player is facing left...
+			if (move > 0 && !m_FacingRight)
+			{
+				// ... flip the player.
+				Flip();
+			}
+			// Otherwise if the input is moving the player left and the player is facing right...
+			else if (move < 0 && m_FacingRight)
+			{
+				// ... flip the player.
+				Flip();
+			}
+		}
+		// If the player should jump...
+		if (m_Grounded && jump)
+		{
+			// Add a vertical force to the player.
+			m_Grounded = false;
+			m_Rigidbody2D.AddForce(new Vector2(0f, m_JumpForce));
+		}
+	}
+
+
+	private void Flip()
+	{
+		// Switch the way the player is labelled as facing.
+		m_FacingRight = !m_FacingRight;
+
+		// Multiply the player's x local scale by -1.
+		Vector3 theScale = transform.localScale;
+		theScale.x *= -1;
+		transform.localScale = theScale;
+	}
+}