martian_duct.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 ACCESS_MARTIAN_MARTIAN_DUCT_H
#define ACCESS_MARTIAN_MARTIAN_DUCT_H

#include "common/scummsys.h"
#include "common/array.h"
#include "common/rect.h"
#include "common/events.h"

#include "access/martian/martian_resources.h" // For Point3 .. move it?

namespace Access {

namespace Martian {

enum MoveIntent {
    kMoveIntentNone,
    kMoveIntentUp,
    kMoveIntentLeft,
    kMoveIntentDown,
    kMoveIntentRight,
};

// Move angles - in the original these are indexes into sin/cos lookup tables.
// Add Invalid to ensure at least 2-byte length.
enum MoveAngle {
    kMoveAngleNorth = 0,
    kMoveAngleEast = 0x40,
    kMoveAngleSouth = 0x80,
    kMoveAngleWest = 0xC0,
    kMoveAngleInvalid = 0xffff,
};

enum DuctFlags {
    kDuctFlagNone = 0,
    kDuctFlagZLessThanX = 1,
    kDuctFlagXLessThanNegZ = 2,
    kDuctFlagYLessThanNegZ = 4,
    kDuctFlagZLessThanY = 8,
    kDuctFlagZLessThan2 = 16,
};

struct RenderShape {
    byte _col;
    Common::Array<uint16> _pointIdxs;
};

class MartianEngine;

class MartianDuct {
public:
    MartianDuct(MartianEngine *vm);
    ~MartianDuct();

    void duct2();
    void duct4();

private:
    void doDuct();
    void drawArrowSprites();
    void drawArrowSprites2();
    void clearWorkScreenArea();
    void copyBufBlockToScreen();
    void waitForMoveUpdate();
    void storeLastValsToPrimArray(const Point3 &pt1, const Point3 &pt2);
    void updatePlayerPos();
    void updateMatrix();
    void applyMatrixToMapData();
    void updatePrimsAndDraw();
    bool updateMapLocation();
    void checkFinished();
    void doMatrixMulAndAddPoint(int16 x, int16 y, int16 z);
    bool doPrimArrayUpdates(int &tempIdx);
    void doDraw(int counter);

    void getPointValuesFromArray(int offset, Point3 &pt1, Point3 &pt2) const;
    Common::Rect calcFinalLineSegment(const Point3 &pt1, const Point3 &pt2) const;

    bool checkAndUpdatePrimArray1(int &offset);
    bool checkAndUpdatePrimArray2(int &offset);
    bool checkAndUpdatePrimArray3(int &offset);
    bool checkAndUpdatePrimArray4(int &offset);
    bool checkAndUpdatePrimArray5(int &offset);
    bool checkAndUpdatePrimArrayForFlag(int &offset, DuctFlags flag, int divmulNum);

    static Point3 divmul1(const Point3 &pt1, const Point3 &pt2);
    static Point3 divmul2(const Point3 &pt1, const Point3 &pt2);
    static Point3 divmul3(const Point3 &pt1, const Point3 &pt2);
    static Point3 divmul4(const Point3 &pt1, const Point3 &pt2);
    static Point3 divmul5(const Point3 &pt1, const Point3 &pt2);

    bool checkMove0();
    bool checkMove1();
    bool checkMove2();
    bool checkMove3();
    bool checkMove4();
    bool checkMove5();
    bool checkMove6();
    bool checkMove7();
    bool checkMove8();
    bool checkMove9();
    bool checkMove10();
    bool checkMove11();
    bool checkMove12();
    bool checkMove13_14();

    void getXYandRBFlags(DuctFlags &xyflags, DuctFlags &rbflags, const Point3 &pt1, const Point3 &pt2);
    int addPointsToMainPrimArray(int tempCount);
    static DuctFlags getComparisonFlags(int16 x, int16 y, int16 z);

    MartianEngine *_vm;
    int16 _playerX;
    int16 _preYOffset;
    int16 _playerY;

    int16 _nextPlayerX;
    int16 _nextPlayerY;
    int16 _xOffset;
    int16 _yOffset;
    int16 _xScale;
    int16 _yScale;
    uint16 _mapLoc;
    MoveAngle _moveAngle;
    int16 _crawlFrame;
    bool _stopMoveLoop;
    int16 _threshold1;
    int16 _drawDistX;
    int16 _drawDistY;
    MoveIntent _moveIntent;

    // NOTE: Original uses fixed point sin/cos with a lookup table.
    float _matrix[3][3];

    int16 _primArrayIdx;

    Common::Array<Point3> _renderPoints;
    Common::Array<RenderShape> _renderShapes;

    Common::Array<int16> _primX1Array;
    Common::Array<int16> _primY1Array;
    Common::Array<int16> _primZ1Array;
    Common::Array<int16> _primX2Array;
    Common::Array<int16> _primY2Array;
    Common::Array<int16> _primZ2Array;
    Point3 _tempPoints[32];
};

}

} // end namespace Access

#endif // ACCESS_MARTIAN_MARTIAN_DUCT_H