3deng.h

/********************************************************/
/*          3D ENGINE - Header File   17/01/95          */
/********************************************************/

#ifndef _3DENG_H_
#define _3DENG_H_


/**************/
/* DATA TYPES */

//Data size definitions
//use these as often as possible
typedef signed char byte;
typedef signed short word;
typedef signed int dword;
#ifndef BYTE
typedef unsigned char BYTE;
#endif

// Types used through 3D pipeline
typedef float datapt;
typedef float rotpt;
typedef dword scrpt;

// Word / Byte union
typedef union {
    struct {
        byte low, hiw;
    } d;
    word c;
} dchar_u;

// DoubleWord / Word union
typedef union {
    struct {
        word low, hiw;
    } d;
    dword dw;
} dword_u;

/**************/
/* MATH TYPES */

// General matrix type
typedef float mat[4][4];

// Rotation matrix type (explicit for speed).
typedef union {
    mat arr;
    struct {
        float r00, r01, r02, r03;
        float r10, r11, r12, r13;
        float r20, r21, r22, r23;
    } e;
} qmat;

/*********************/
/* 3D GEOMETRY TYPES */

// 3D point & point-list types
typedef datapt *pt;
typedef datapt ptlist[];

// Face & face-list types
typedef word *face;
typedef word facelist[];

// Rotated point type
typedef rotpt *rpt;

/*********************/
/* 2D GEOMETRY TYPES */

// Screen point type
typedef struct {
    scrpt x, y;
} pnt;

// Gourad screen point type
typedef struct {
    scrpt x, y, col;
} ppnt;

// Screen point with z type (Bi-Quadratic mapping)
typedef struct {
    scrpt z, x, y;
} zpnt;

// Screen polygon type (with average z for sort)
typedef struct {
    rotpt z;
    scrpt *pts;
} pols;



/****************/
/* OBJECT TYPES */

// Object type
typedef struct {
    pt points;
    face faces;
    datapt x, y, z;
    float crot, srot;
} obj;

// Object list type
typedef struct {
    rotpt z;
    pols *polys;
    short nopols;
} objs;

// Object detail level type
typedef struct {
    rotpt zscale; // min z/q for this detail level
    pt dpoints;
    face dfaces;
} det;

// Object detail level list
typedef det detlist[];



/*****************/
/* SURFACE TYPES */

// Texture type
typedef dword texture[8]; // Assumes 4 pt textures, other nos of pts are padded out

// Polygon filter type
typedef BYTE filter[256];



/************************/
/* MOTION CAPTURE TYPES */

// Specific for players only
#define PLYRPTS 28

typedef datapt capfrm[PLYRPTS * 3 + 1];

typedef struct {
    word cappts, capfrms;
} mcap;



/*********************/
/* PLAYER INFO TYPES */

typedef struct {
    float x, y, z, crot, srot, frame, fstep;
    short type, number, anim, sprite;
    BYTE htype, hcol;
} plyrdat;

typedef struct {
    datapt *twnfrm;
    capfrm twnpts1, twnpts2;
    float tween, tstep;
    short anim, animto;
} plyrtwdat;



/**************/
/* MISC TYPES */

typedef struct {
    short sky;
    short stadia;
    short pitch;
    short players;
    short lines;
    short shadows;
} detail_info;

// Setup data type
typedef struct {
    short M8;
    short team_a, team_b;
    short team_b_kit;
    short stadium;
    short vidi_type;
    short start_res;
    short screen_size;
    short verbose;
    detail_info detail;
} setup_info;

// Screen buffer info type
typedef struct {
    BYTE *buff_start;
    scrpt buff_wid, buff_hgt;
    scrpt clip_wid, clip_hgt;
    float scale_x, scale_y;

    void (*dump)(scrpt dispx, scrpt dispy);
} buff_info;

// Extended screen buffer info type
typedef struct {
    BYTE *buff_start;
    BYTE *clip_end, *clip_endl;
    scrpt buff_wid, buff_hgt;
    scrpt clip_wid, clip_hgt, clip_widl, clip_hgtl;
    scrpt clip_xmid, clip_ymid;
    float scale_x, scale_y;

    void (*dump)(scrpt dispx, scrpt dispy);
} buff_info_ext;

typedef struct {
    int pitchfile, pitchpfile;
    char skytypes[2];
    int tmdfile;
    int sb1file, sb2file;
    datapt s1x, s1y, s1z;
    int s1pfile, s1ffile;
    datapt s2x, s2y, s2z;
    int s2pfile, s2ffile;
    datapt s3x, s3y, s3z;
    int s3pfile, s3ffile;
    datapt s4x, s4y, s4z;
    int s4pfile, s4ffile;
    int st_w, st_l, st_h;
    short noloop;
    int loop[20];
    int vid1x, vid1y, vid1z;
    int vid2x, vid2y, vid2z;
    int tunlx, tunly, tunlz;
    int vmap;
} stad_info;

typedef struct {
    int headfile;
    int torsofile;
    int limbsfile;
    int nosfile;
    int palfile;
    int skinfile;
    int homepfile;
    int awaypfile;
} teamk_info;



/***********************/
/* FUNCTION PROTOTYPES */

int init3d();

void setscreen();

void end3d();

void render3d(buff_info *buffer, datapt viewx, datapt viewy, datapt viewz, datapt targx, datapt targy,
              datapt targz, datapt vdist, plyrdat *plyrtb, datapt *xyz_ptr, word *ref_ptr);

#endif