protected void FollowTarget()
{
Rect cameraRect = Utilities2D.CameraBounds2D(_camera);
float horizontalScale = 1.0f;
float verticalScale = 1.0f;
Vector3 targetPos = GetTargetPosition();
if (float.IsNaN(targetPos.x) || float.IsNaN(targetPos.y))
{
return;
}
if (_checkForBounds)
{
// left smooth edge
if (targetPos.x < _transform.position.x &&
cameraRect.x > _bounds.x && cameraRect.x < _innerBounds.x)
{
horizontalScale = 1.0f + (cameraRect.x - _innerBounds.x) / smoothEdge;
}
// right smooth edge
else if (targetPos.x > _transform.position.x &&
cameraRect.xMax > _innerBounds.xMax && cameraRect.xMax < _bounds.xMax)
{
horizontalScale = 1.0f - (cameraRect.xMax - _innerBounds.xMax) / smoothEdge;
}
// hard left edge
else if (targetPos.x < _transform.position.x &&
cameraRect.x <= _bounds.x)
{
horizontalScale = 0;
}
// hard right edge
else if (targetPos.x > _transform.position.x &&
cameraRect.xMax >= _bounds.xMax)
{
horizontalScale = 0;
}
// bottom edge
if (targetPos.y < _transform.position.y &&
cameraRect.y > _bounds.y && cameraRect.y < _innerBounds.y)
{
verticalScale = 1.0f + (cameraRect.y - _innerBounds.y) / smoothEdge;
}
// top edge
else if (targetPos.y > _transform.position.y &&
cameraRect.yMax > _innerBounds.yMax && cameraRect.yMax < _bounds.yMax)
{
verticalScale = 1.0f - (cameraRect.yMax - _innerBounds.yMax) / smoothEdge;
}
// hard bottom edge
else if (targetPos.y < _transform.position.y &&
cameraRect.y <= _bounds.y)
{
verticalScale = 0;
}
// hard top edge
else if (targetPos.y > _transform.position.y &&
cameraRect.yMax >= _bounds.yMax)
{
verticalScale = 0;
}
}
float targetX = Mathf.Lerp(_transform.position.x, targetPos.x, horizontalFollowSpeed * Time.deltaTime * horizontalScale);
if (direction == MoveDirection.Vertical)
{
targetX = _transform.position.x;
}
float targetY = Mathf.Lerp(_transform.position.y, targetPos.y, verticalFollowSpeed * Time.deltaTime * verticalScale);
if (direction == MoveDirection.Horizontal)
{
targetY = _transform.position.y;
}
_transform.position = new Vector3(targetX, targetY, _transform.position.z);
ApplyBounds();
}
