Unity Platform 06 Ledge Climb
===
2020.08.13

###### tags: `platform`

## List
1. [Ledge Climb](#LC)
2. [Script](#S)
3. [Editor](#E)

## Content
### Ledge Climb<a id="LC"/>
Climbing ledge is one of charactor's movement.<br>Consider it with animation and position.<br>animtion is only show images set, so, must set postion in script for smoothing with animation.<br><br>

### Script<a id="S"/>
Make it with some variable.<br><br>First, set conditions for climb action.<br>This conditions are applied like wall check

public Transform ledgeCheck;
private bool isTouchingLedge;
private bool canClimbLedge = false;
private bool ledgeDetected;

private void CheckSurroundings()
{
    ~~~
    if (isTouchingWall && !isTouchingLedge && !ledgeDetected)
    {
        ledgeDetected = true;
        ledgePosBot = wallCheck.position;
    }
}

Second, check canClimb state, and set position after or ~ing climb action.<br>`ledgePos1` is first postion when start climb, `ledgePos2` is second postion when end climb<br>Set in `update()`

private Vector2 ledgePosBot;
private Vector2 ledgePos1;
private Vector2 ledgePos2;
public float ledgeClimbXOffset1 = 0f;
public float ledgeClimbYOffset1 = 0f;
public float ledgeClimbXOffset2 = 0f;
public float ledgeClimbYOffset2 = 0f;

private void CheckLedge()
{
    if (ledgeDetected && !canClimbLedge)
    {
        canClimbLedge = true;

        if (isFacingRight)
        {
            ledgePos1 = new Vector2(Mathf.Floor(ledgePosBot.x + wallCheckDistance) - ledgeClimbXOffset1, 
                                    Mathf.Floor(ledgePosBot.y) + ledgeClimbYOffset1);
            ledgePos2 = new Vector2(Mathf.Floor(ledgePosBot.x + wallCheckDistance) + ledgeClimbXOffset2,
                                    Mathf.Floor(ledgePosBot.y) + ledgeClimbYOffset2);
        }
        else
        {
            ledgePos1 = new Vector2(Mathf.Floor(ledgePosBot.x - wallCheckDistance) + ledgeClimbXOffset1, 
                                    Mathf.Floor(ledgePosBot.y) + ledgeClimbYOffset1);
            ledgePos2 = new Vector2(Mathf.Floor(ledgePosBot.x - wallCheckDistance) - ledgeClimbXOffset2,
                                    Mathf.Floor(ledgePosBot.y) + ledgeClimbYOffset2);
        }

        canMove = false;
        canMove = true;
    }

    if (canClimbLedge)
    {
        transform.position = ledgePos1;
    }
    anim.SetBool("canClimbLedge", canClimbLedge);
}

Last, end animation, set position to `ledgePos2` and reset all conditions.<br>

public void FinishLedgeClimb()
{
    canClimbLedge = false;
    transform.position = ledgePos2;
    canMove = true;
    canFlip = true;
    ledgeDetected = false;
    anim.SetBool("canClimbLedge", canClimbLedge);
}

<br><br>

### Editor<a id="S"/>
Set animation controller.<br>Make Two transition and edit condition(*canClimbEdge*)<br>And Add `FinishClimb` Event in animtion window(not animation controller).<br>Setting offset needs to be changed with play window.