/// <summary>
/// Allows the Companion to "slide" along walls instead of getting stuck on them
/// </summary>
protected void HandleWallSliding()
{
if (lastFrameVelocity != Vector2.Zero && lastFrameMovement == Vector2.Zero &&
(me.xVelocity != 0 || me.yVelocity != 0))
{
Rectangle wbBB = me.GetBoundingBox();
int ts = Game1.tileSize;
bool xBlocked, yBlocked;
xBlocked = yBlocked = false;
if (me.xVelocity != 0)
{
int velocitySign = Math.Sign(me.xVelocity) * 15;
int leftOrRight = ((me.xVelocity > 0 ? wbBB.Right : wbBB.Left) + velocitySign) / ts;
bool[] xTiles = new bool[3];
xTiles[0] = aStar.IsWalkableTile(new Vector2(leftOrRight, wbBB.Top / ts));
xTiles[1] = aStar.IsWalkableTile(new Vector2(leftOrRight, wbBB.Center.Y / ts));
xTiles[2] = aStar.IsWalkableTile(new Vector2(leftOrRight, wbBB.Bottom / ts));
foreach (bool b in xTiles)
{
if (!b)
{
me.xVelocity *= -0.25f;
xBlocked = true;
break;
}
}
}
if (me.yVelocity != 0)
{
int velocitySign = Math.Sign(me.yVelocity) * 15;
int topOrBottom = ((me.yVelocity < 0 ? wbBB.Bottom : wbBB.Top) - velocitySign) / ts;
bool[] yTiles = new bool[3];
yTiles[0] = aStar.IsWalkableTile(new Vector2(wbBB.Left / ts, topOrBottom));
yTiles[1] = aStar.IsWalkableTile(new Vector2(wbBB.Center.X / ts, topOrBottom));
yTiles[2] = aStar.IsWalkableTile(new Vector2(wbBB.Right / ts, topOrBottom));
foreach (bool b in yTiles)
{
if (!b)
{
me.yVelocity *= -0.25f;
yBlocked = true;
break;
}
}
}
if (xBlocked)
{
me.yVelocity *= 2.5f;
}
else if (yBlocked)
{
me.xVelocity *= 2.5f;
}
}
}
