camera_process.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef ULTIMA8_WORLD_CAMERAPROCESS_H
#define ULTIMA8_WORLD_CAMERAPROCESS_H

#include "ultima/ultima8/kernel/process.h"
#include "ultima/ultima8/usecode/intrinsics.h"
#include "ultima/ultima8/misc/classtype.h"
#include "ultima/ultima8/misc/point3.h"

namespace Ultima {
namespace Ultima8 {

class CameraProcess : public Process {
public:
    CameraProcess();
    CameraProcess(uint16 itemnum);                // Follow item/Do nothing
    CameraProcess(const Point3 &p);               // Goto location
    CameraProcess(const Point3 &p, int32 time);   // Scroll to location

    ~CameraProcess() override;

    ENABLE_RUNTIME_CLASSTYPE()

    void run() override;

    // You will notice that this isn't the same as how Item::GetLerped works
    Point3 GetLerped(int32 factor, bool noupdate = false);

    uint16 findRoof(int32 factor);

    void moveToLocation(int32 x, int32 y, int32 z);
    void moveToLocation(const Point3 &p);

    INTRINSIC(I_setCenterOn);
    INTRINSIC(I_moveTo);
    INTRINSIC(I_scrollTo);
    INTRINSIC(I_startQuake);
    INTRINSIC(I_stopQuake);
    INTRINSIC(I_getCameraX);
    INTRINSIC(I_getCameraY);
    INTRINSIC(I_getCameraZ);

    static Point3           GetCameraLocation();
    static CameraProcess   *GetCameraProcess() {
        return _camera;
    }

    static uint16           SetCameraProcess(CameraProcess *);
    static void             ResetCameraProcess();

    static void             SetEarthquake(int32 e) {
        _earthquake = e;
        if (!e)  _eqX = _eqY = 0;
    }

    void itemMoved();

    void terminate() override;   // Terminate NOW!

    bool loadData(Common::ReadStream *rs, uint32 version);
    void saveData(Common::WriteStream *ws) override;

    uint16 getTrackedItem() const {
        return _itemNum;
    }

private:
    Point3 _s;
    Point3 _e;
    int32 _time;
    int32 _elapsed;
    uint16 _itemNum;

    int32 _lastFrameNum;

    static CameraProcess *_camera;
    static int32 _earthquake;
    static int32 _eqX, _eqY;
};

} // End of namespace Ultima8
} // End of namespace Ultima

#endif