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 * gaia - opensource 3D interface to the planet
 * Copyright (C) 2006 gaia project
 * 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
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

#ifndef __GAIA__EARTHVIEW_H__
#define __GAIA__EARTHVIEW_H__

#include "Viewpoint.h"
#include "MasterLayer.h"

#define NAV_DRAG_PAN    0x01
#define NAV_DRAG_ZOOM   0x02

#define NAV_PAN_LEFT    0x01
#define NAV_PAN_RIGHT   0x02
#define NAV_PAN_UP      0x04
#define NAV_PAN_DOWN    0x08

#define NAV_ZOOM_IN     0x10
#define NAV_ZOOM_OUT    0x20

 * Abstract class for earth view.
00040 class EarthView {
      EarthView(MasterLayer *ml);
      virtual ~EarthView();

      virtual void Render() = 0;
      virtual void Animate(double delta) = 0;

      void Resize(int width, int height);

      virtual int StartDrag(int x, int y, int flags);
      virtual int Drag(int fromx, int fromy, int x, int y, int flags);
      virtual int Click(int x, int y, int flags);

      virtual int StartMovement(int flags);
      virtual int StopMovement(int flags);
      virtual int SingleMovement(int flags);

00059       MasterLayer *m_MasterLayer;         ///< Master layer to use
00060       Eye         m_Eye;                  ///< Current viewer's position

00062       int         m_ViewportWidth;  ///< Viewport width in pixels
00063       int         m_ViewportHeight; ///< Viewport height in pixels


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