Floor floor = World.player.floor;
if (floor != null)
{
    int stepTurn = 0;
    if (Game.input.justPressed(GameInput.Action.WALK_TURN_LEFT))
    {
        stepTurn = -1;
    }
    if (Game.input.justPressed(GameInput.Action.WALK_TURN_RIGHT))
    {
        stepTurn = 1;
    }

    float playerCurrentAngle = this.transform.eulerAngles.z;
    float targetAngle = floor.transform.eulerAngles.z;
    targetAngle += Mathf.Round(playerCurrentAngle / 90f) * 90f;
    if (stepTurn != 0)
    {
        this.m_TargetAngleSet = true;
        this.m_TargetAngle = targetAngle - 90f * stepTurn;
    }
    if (this.m_TargetAngleSet)
    {
        targetAngle = this.m_TargetAngle;
    }

    float angleDiff = Mathf.DeltaAngle(targetAngle,playerCurrentAngle);
    if ( this.m_TargetAngleSet && (Mathf.Abs(angleDiff) <= 0f))
    {
        this.m_TargetAngleSet = false;
    }

    Vector3 playerAngles = this.transform.eulerAngles;
    if (Mathf.Abs(angleDiff) > 0f)
    {
        if (Mathf.Abs(angleDiff) < 5f)
        {
            playerCurrentAngle = targetAngle;
        }
        {
            playerAngles.z -= Mathf.Lerp(0, angleDiff,Time.deltaTime * 8.0f);
        }
        this.transform.eulerAngles = playerAngles;
    }
} else
{
    this.m_TargetAngleSet = false;
    int stepTurn = 0;
    if (Game.input.down(GameInput.Action.WALK_TURN_LEFT))
    {
        stepTurn = -1;
    }
    if (Game.input.down(GameInput.Action.WALK_TURN_RIGHT))
    {
        stepTurn = 1;
    }
    if (stepTurn != 0)
    {
        Vector3 playerAngles = this.transform.eulerAngles;
        playerAngles.z += - stepTurn * Time.deltaTime * 90.0f;
        this.transform.eulerAngles = playerAngles;
    }
}