gameutil.h

//-------------------------------------------------------------------------
/*
Copyright (C) 2010-2019 EDuke32 developers and contributors
Copyright (C) 2019 Nuke.YKT

This file is part of NBlood.

NBlood is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License version 2
as published by the Free Software Foundation.

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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/
//-------------------------------------------------------------------------
#pragma once
#include "build.h"
#include "common_game.h"

BEGIN_BLD_NS

struct HITINFO {
    DBloodActor* hitactor;
    short hitsect;
    short hitwall;
    int hitx;
    int hity;
    int hitz;

    void clearObj()
    {
        hitsect = hitwall = -1;
        hitactor = nullptr;
    }
    void set(hitdata_t* hit);
};

extern POINT2D baseWall[kMaxWalls];
extern int baseFloor[kMaxSectors];
extern int baseCeil[kMaxSectors];
extern int velFloor[kMaxSectors];
extern int velCeil[kMaxSectors];
extern DBloodActor* gUpperLink[kMaxSectors];
extern DBloodActor* gLowerLink[kMaxSectors];
extern HITINFO gHitInfo;

enum {
    PARALLAXCLIP_CEILING = 1,
    PARALLAXCLIP_FLOOR = 2,
};


// by NoOne: functions to quickly check range of specifical arrays
inline bool sectRangeIsFine(int nIndex) {
    return (nIndex >= 0 && nIndex < kMaxSectors);
}

inline bool wallRangeIsFine(int nIndex) {
    return (nIndex >= 0 && nIndex < kMaxWalls);
}
///
struct Collision;
bool AreSectorsNeighbors(int sect1, int sect2);
bool FindSector(int nX, int nY, int nZ, int *nSector);
bool FindSector(int nX, int nY, int *nSector);
bool CheckProximity(DBloodActor *pSprite, int nX, int nY, int nZ, int nSector, int nDist);
bool CheckProximityPoint(int nX1, int nY1, int nZ1, int nX2, int nY2, int nZ2, int nDist);
bool CheckProximityWall(int nWall, int x, int y, int nDist);
int GetWallAngle(int nWall);
int GetWallAngle(walltype* pWall);
void GetWallNormal(int nWall, int *pX, int *pY);
bool IntersectRay(int wx, int wy, int wdx, int wdy, int x1, int y1, int z1, int x2, int y2, int z2, int *ix, int *iy, int *iz);
int HitScan(DBloodActor *pSprite, int z, int dx, int dy, int dz, unsigned int nMask, int a8);
int VectorScan(DBloodActor *pSprite, int nOffset, int nZOffset, int dx, int dy, int dz, int nRange, int ac);
void GetZRange(DBloodActor *pSprite, int *ceilZ, Collision *ceilHit, int *floorZ, Collision *floorHit, int nDist, unsigned int nMask, unsigned int nClipParallax = 0);
void GetZRangeAtXYZ(int x, int y, int z, int nSector, int *ceilZ, Collision *ceilHit, int *floorZ, Collision *floorHit, int nDist, unsigned int nMask, unsigned int nClipParallax = 0);
int GetDistToLine(int x1, int y1, int x2, int y2, int x3, int y3);
unsigned int ClipMove(int *x, int *y, int *z, int *nSector, int xv, int yv, int wd, int cd, int fd, unsigned int nMask);
int GetClosestSectors(int nSector, int x, int y, int nDist, short *pSectors, char *pSectBit);
int GetClosestSpriteSectors(int nSector, int x, int y, int nDist, uint8_t *pSectBit, short *pWalls = nullptr, bool newSectCheckMethod = false);
int picWidth(short nPic, short repeat);
int picHeight(short nPic, short repeat);


END_BLD_NS