/**
 * @(#) $RCSfile: BlueFadeTotalLoop.as,v $ $Revision: 1.2 $ $Date: 2003/02/27 23:25:55 $
 *
 * Copyright 2003 Orgdot AS. All Rights Reserved.
 * http://dev.swfit.com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

/**
 * Keeps track of the roller movements.
 *
 * @author      Olaf Havnes
 * @version     $Revision: 1.2 $ $Date: 2003/02/27 23:25:55 $
 * @since       SWFIT1.0
 */

// Should we start the roller ?

if (stage == END_STAGE || stage == ROLL_STAGE)
{
    d = Y_REST - yp;
    y_speed += spring * d - friction * y_speed;
    yp += y_speed;

    if (stage == ROLL_STAGE)
    {
        if (y < Y_REST)
        {
            // First time we pass the rest point we go to the end stage
            stage = END_STAGE;
            end_counter = 0;
        }
    }
    else if (stage == END_STAGE)
    {
        // Finish the bounce in the roller
        end_counter++;
        if (end_counter > END_STEPS)
        {
            yp = Y_REST;
            stage = REST_STAGE;
            /:do_roll = false;
        }
    }
}
else if (stage == WAIT_STAGE)
{
    wait_counter ++;
    if (wait_counter > WAIT_STEPS)
    {
        stage = ROLL_STAGE;
        y_speed = ROLL_SPEED_START;
    }
}
else if (stage == WIND_STAGE)
{
    yp += WIND_SPEED;    
    if (yp > Y_WIND)
    {
        stage = WAIT_STAGE;
        wait_counter = 0;
    }
}
else if (stage == REST_STAGE)
{
    if (/:do_roll)
    {
        stage = WIND_STAGE;
    }
}

// Move the roller
y = int (yp);
roller._y = y;

// Move the gradient
if (stage == WIND_STAGE)
{
    grad._y = y;
    grad._visible = true;
}
else
{
    grad._visible = false;
}