移除ECM2
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using UnityEngine;
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namespace ECM2.Examples.Ladders
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{
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/// <summary>
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/// This example shows how to extend a Character (through composition) adding a custom movement mode.
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/// Here we implement a ladder climbing ability using a Climbing custom movement mode.
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/// </summary>
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public class LadderClimbAbility : MonoBehaviour
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{
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public enum CustomMovementMode
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{
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Climbing = 1
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}
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public enum ClimbingState
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{
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None,
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Grabbing,
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Grabbed,
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Releasing
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}
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public float climbingSpeed = 5.0f;
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public float grabbingTime = 0.25f;
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public LayerMask ladderMask;
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private Character _character;
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private Ladder _activeLadder;
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private float _ladderPathPosition;
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private Vector3 _ladderStartPosition;
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private Vector3 _ladderTargetPosition;
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private Quaternion _ladderStartRotation;
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private Quaternion _ladderTargetRotation;
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private float _ladderTime;
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private ClimbingState _climbingState;
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private Character.RotationMode _previousRotationMode;
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/// <summary>
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/// True if the Character is in Climbing custom movement mode, false otherwise.
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/// </summary>
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public bool IsClimbing()
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{
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bool isClimbing = _character.movementMode == Character.MovementMode.Custom &&
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_character.customMovementMode == (int)CustomMovementMode.Climbing;
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return isClimbing;
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}
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/// <summary>
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/// Determines if the Character is able to climb.
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/// </summary>
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private bool CanClimb()
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{
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// Do not allow to climb if crouching
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if (_character.IsCrouched())
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return false;
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// Attempt to find a ladder
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CharacterMovement characterMovement = _character.characterMovement;
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var overlappedColliders =
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characterMovement.OverlapTest(ladderMask, QueryTriggerInteraction.Collide, out int overlapCount);
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if (overlapCount == 0)
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return false;
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// Is a ladder ?
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if (!overlappedColliders[0].TryGetComponent(out Ladder ladder))
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return false;
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// Found a ladder, make it active ladder and return
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_activeLadder = ladder;
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return true;
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}
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/// <summary>
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/// Start a climb.
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/// Call this from an input event (such as a button 'down' event).
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/// </summary>
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public void Climb()
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{
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if (IsClimbing() || !CanClimb())
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return;
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_character.SetMovementMode(Character.MovementMode.Custom, (int) CustomMovementMode.Climbing);
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_ladderStartPosition = _character.GetPosition();
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_ladderTargetPosition = _activeLadder.ClosestPointOnPath(_ladderStartPosition, out _ladderPathPosition);
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_ladderStartRotation = _character.GetRotation();
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_ladderTargetRotation = _activeLadder.transform.rotation;
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}
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/// <summary>
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/// Stop the Character from climbing.
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/// Call this from an input event (such as a button 'up' event).
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/// </summary>
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public void StopClimbing()
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{
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if (!IsClimbing() || _climbingState != ClimbingState.Grabbed)
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return;
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_climbingState = ClimbingState.Releasing;
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_ladderStartPosition = _character.GetPosition();
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_ladderStartRotation = _character.GetRotation();
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_ladderTargetPosition = _ladderStartPosition;
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_ladderTargetRotation = _activeLadder.BottomPoint.rotation;
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}
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/// <summary>
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/// Perform climbing movement.
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/// </summary>
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private void ClimbingMovementMode(float deltaTime)
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{
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Vector3 velocity = Vector3.zero;
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switch (_climbingState)
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{
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case ClimbingState.Grabbing:
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case ClimbingState.Releasing:
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{
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_ladderTime += deltaTime;
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if (_ladderTime <= grabbingTime)
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{
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Vector3 interpolatedPosition = Vector3.Lerp(_ladderStartPosition, _ladderTargetPosition, _ladderTime / grabbingTime);
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velocity = (interpolatedPosition - transform.position) / deltaTime;
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}
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else
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{
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// If target has been reached, change ladder phase
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_ladderTime = 0.0f;
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if (_climbingState == ClimbingState.Grabbing )
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{
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// Switch to ladder climb phase
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_climbingState = ClimbingState.Grabbed;
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}
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else if (_climbingState == ClimbingState.Releasing)
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{
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// Exit climbing state (change to falling movement mode)
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_character.SetMovementMode(Character.MovementMode.Falling);
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}
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}
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break;
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}
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case ClimbingState.Grabbed:
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{
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// Get the path position from character's current position
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_activeLadder.ClosestPointOnPath(_character.GetPosition(), out _ladderPathPosition);
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if (Mathf.Abs(_ladderPathPosition) < 0.05f)
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{
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// Move the character along the ladder path
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Vector3 movementInput = _character.GetMovementDirection();
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velocity = _activeLadder.transform.up * (movementInput.z * climbingSpeed);
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}
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else
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{
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// If reached on of the ladder path extremes, change to releasing phase
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_climbingState = ClimbingState.Releasing;
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_ladderStartPosition = _character.GetPosition();
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_ladderStartRotation = _character.GetRotation();
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if (_ladderPathPosition > 0.0f)
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{
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// Above ladder path top point
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_ladderTargetPosition = _activeLadder.TopPoint.position;
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_ladderTargetRotation = _activeLadder.TopPoint.rotation;
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}
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else if (_ladderPathPosition < 0.0f)
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{
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// Below ladder path bottom point
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_ladderTargetPosition = _activeLadder.BottomPoint.position;
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_ladderTargetRotation = _activeLadder.BottomPoint.rotation;
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}
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}
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break;
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}
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}
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// Update character's velocity
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_character.SetVelocity(velocity);
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}
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private void OnMovementModeChanged(Character.MovementMode prevMovementMode, int prevCustomMovementMode)
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{
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// Enter Climbing movement mode
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if (IsClimbing())
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{
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_climbingState = ClimbingState.Grabbing;
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_character.StopJumping();
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_character.EnableGroundConstraint(false);
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_previousRotationMode = _character.rotationMode;
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_character.SetRotationMode(Character.RotationMode.Custom);
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}
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// Exit Climbing movement mode
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bool wasClimbing = prevMovementMode == Character.MovementMode.Custom &&
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prevCustomMovementMode == (int)CustomMovementMode.Climbing;
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if (wasClimbing)
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{
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_climbingState = ClimbingState.None;
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_character.EnableGroundConstraint(true);
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_character.SetRotationMode(_previousRotationMode);
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}
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}
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private void OnCustomMovementModeUpdated(float deltaTime)
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{
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if (IsClimbing())
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ClimbingMovementMode(deltaTime);
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}
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private void OnCustomRotationModeUpdated(float deltaTime)
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{
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if (IsClimbing() && (_climbingState == ClimbingState.Grabbing || _climbingState == ClimbingState.Releasing))
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{
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Quaternion rotation =
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Quaternion.Slerp(_ladderStartRotation, _ladderTargetRotation, _ladderTime / grabbingTime);
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_character.SetRotation(rotation);
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}
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}
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private void Awake()
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{
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_character = GetComponent<Character>();
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}
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private void OnEnable()
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{
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_character.MovementModeChanged += OnMovementModeChanged;
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_character.CustomMovementModeUpdated += OnCustomMovementModeUpdated;
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_character.CustomRotationModeUpdated += OnCustomRotationModeUpdated;
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}
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private void OnDisable()
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{
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_character.MovementModeChanged -= OnMovementModeChanged;
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_character.CustomMovementModeUpdated -= OnCustomMovementModeUpdated;
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_character.CustomRotationModeUpdated -= OnCustomRotationModeUpdated;
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}
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}
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}
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