[xonotic/darkplaces.git] / protocol.h

/*
Copyright (C) 1996-1997 Id Software, Inc.

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
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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
// protocol.h -- communications protocols

#ifndef PROTOCOL_H
#define PROTOCOL_H

#define PROTOCOL_VERSION        15
#define DPPROTOCOL_VERSION1     96
#define DPPROTOCOL_VERSION2     97
// LordHavoc: I think the 96-99 range was going to run out too soon...  so here I jump to 3500
#define DPPROTOCOL_VERSION3     3500

// model effects
#define EF_ROCKET       1                       // leave a trail
#define EF_GRENADE      2                       // leave a trail
#define EF_GIB          4                       // leave a trail
#define EF_ROTATE       8                       // rotate (bonus items)
#define EF_TRACER       16                      // green split trail
#define EF_ZOMGIB       32                      // small blood trail
#define EF_TRACER2      64                      // orange split trail + rotate
#define EF_TRACER3      128                     // purple trail
// entity effects
#define EF_BRIGHTFIELD                  1
#define EF_MUZZLEFLASH                  2
#define EF_BRIGHTLIGHT                  4
#define EF_DIMLIGHT                     8
#define EF_NODRAW                               16
#define EF_ADDITIVE                             32
#define EF_BLUE                                 64
#define EF_RED                                  128
#define EF_DELTA                                8388608 // LordHavoc: (obsolete) entity is delta compressed to save network bandwidth  (no longer used)
#define EF_LOWPRECISION                 4194304 // LordHavoc: entity is low precision (integer coordinates) to save network bandwidth
// effects/model (can be used as model flags or entity effects)
#define EF_REFLECTIVE                   256             // LordHavoc: shiny metal objects :)  (not currently supported)
#define EF_FULLBRIGHT                   512             // LordHavoc: fullbright
#define EF_FLAME                                1024    // LordHavoc: on fire
#define EF_STARDUST                             2048    // LordHavoc: showering sparks
#define EF_NOSHADOW                             4096    // LordHavoc: does not cast a shadow

#define EF_STEP                                 0x80000000 // internal client use only - present on MOVETYPE_STEP entities, not QC accessible (too many bits)

// if the high bit of the servercmd is set, the low bits are fast update flags:
#define U_MOREBITS              (1<<0)
#define U_ORIGIN1               (1<<1)
#define U_ORIGIN2               (1<<2)
#define U_ORIGIN3               (1<<3)
#define U_ANGLE2                (1<<4)
// LordHavoc: U_NOLERP was only ever used for monsters, so I renamed it U_STEP
#define U_STEP                  (1<<5)
#define U_FRAME                 (1<<6)
// just differentiates from other updates
#define U_SIGNAL                (1<<7)

#define U_ANGLE1                (1<<8)
#define U_ANGLE3                (1<<9)
#define U_MODEL                 (1<<10)
#define U_COLORMAP              (1<<11)
#define U_SKIN                  (1<<12)
#define U_EFFECTS               (1<<13)
#define U_LONGENTITY    (1<<14)

// LordHavoc: protocol extension
#define U_EXTEND1               (1<<15)
// LordHavoc: first extend byte
#define U_DELTA                 (1<<16) // no data, while this is set the entity is delta compressed (uses previous frame as a baseline, meaning only things that have changed from the previous frame are sent, except for the forced full update every half second)
#define U_ALPHA                 (1<<17) // 1 byte, 0.0-1.0 maps to 0-255, not sent if exactly 1, and the entity is not sent if <=0 unless it has effects (model effects are checked as well)
#define U_SCALE                 (1<<18) // 1 byte, scale / 16 positive, not sent if 1.0
#define U_EFFECTS2              (1<<19) // 1 byte, this is .effects & 0xFF00 (second byte)
#define U_GLOWSIZE              (1<<20) // 1 byte, encoding is float/8.0, signed (negative is darklight), not sent if 0
#define U_GLOWCOLOR             (1<<21) // 1 byte, palette index, default is 254 (white), this IS used for darklight (allowing colored darklight), however the particles from a darklight are always black, not sent if default value (even if glowsize or glowtrail is set)
// LordHavoc: colormod feature has been removed, because no one used it
#define U_COLORMOD              (1<<22) // 1 byte, 3 bit red, 3 bit green, 2 bit blue, this lets you tint an object artifically, so you could make a red rocket, or a blue fiend...
#define U_EXTEND2               (1<<23) // another byte to follow
// LordHavoc: second extend byte
#define U_GLOWTRAIL             (1<<24) // leaves a trail of particles (of color .glowcolor, or black if it is a negative glowsize)
#define U_VIEWMODEL             (1<<25) // attachs the model to the view (origin and angles become relative to it), only shown to owner, a more powerful alternative to .weaponmodel and such
#define U_FRAME2                (1<<26) // 1 byte, this is .frame & 0xFF00 (second byte)
#define U_MODEL2                (1<<27) // 1 byte, this is .modelindex & 0xFF00 (second byte)
#define U_EXTERIORMODEL (1<<28) // causes this model to not be drawn when using a first person view (third person will draw it, first person will not)
#define U_UNUSED29              (1<<29) // future expansion
#define U_UNUSED30              (1<<30) // future expansion
#define U_EXTEND3               (1<<31) // another byte to follow, future expansion

#define SU_VIEWHEIGHT   (1<<0)
#define SU_IDEALPITCH   (1<<1)
#define SU_PUNCH1               (1<<2)
#define SU_PUNCH2               (1<<3)
#define SU_PUNCH3               (1<<4)
#define SU_VELOCITY1    (1<<5)
#define SU_VELOCITY2    (1<<6)
#define SU_VELOCITY3    (1<<7)
//define        SU_AIMENT               (1<<8)  AVAILABLE BIT
#define SU_ITEMS                (1<<9)
#define SU_ONGROUND             (1<<10)         // no data follows, the bit is it
#define SU_INWATER              (1<<11)         // no data follows, the bit is it
#define SU_WEAPONFRAME  (1<<12)
#define SU_ARMOR                (1<<13)
#define SU_WEAPON               (1<<14)
#define SU_EXTEND1              (1<<15)
// first extend byte
#define SU_PUNCHVEC1    (1<<16)
#define SU_PUNCHVEC2    (1<<17)
#define SU_PUNCHVEC3    (1<<18)
#define SU_VIEWZOOM             (1<<19) // byte factor (0 = 0.0 (not valid), 255 = 1.0)
#define SU_UNUSED20             (1<<20)
#define SU_UNUSED21             (1<<21)
#define SU_UNUSED22             (1<<22)
#define SU_EXTEND2              (1<<23) // another byte to follow, future expansion
// second extend byte
#define SU_UNUSED24             (1<<24)
#define SU_UNUSED25             (1<<25)
#define SU_UNUSED26             (1<<26)
#define SU_UNUSED27             (1<<27)
#define SU_UNUSED28             (1<<28)
#define SU_UNUSED29             (1<<29)
#define SU_UNUSED30             (1<<30)
#define SU_EXTEND3              (1<<31) // another byte to follow, future expansion

// a sound with no channel is a local only sound
#define SND_VOLUME              (1<<0)          // a byte
#define SND_ATTENUATION (1<<1)          // a byte
#define SND_LOOPING             (1<<2)          // a long


// defaults for clientinfo messages
#define DEFAULT_VIEWHEIGHT      22


// game types sent by serverinfo
// these determine which intermission screen plays
#define GAME_COOP                       0
#define GAME_DEATHMATCH         1

//==================
// note that there are some defs.qc that mirror to these numbers
// also related to svc_strings[] in cl_parse
//==================

//
// server to client
//
#define svc_bad                         0
#define svc_nop                         1
#define svc_disconnect          2
#define svc_updatestat          3       // [byte] [long]
#define svc_version                     4       // [long] server version
#define svc_setview                     5       // [short] entity number
#define svc_sound                       6       // <see code>
#define svc_time                        7       // [float] server time
#define svc_print                       8       // [string] null terminated string
#define svc_stufftext           9       // [string] stuffed into client's console buffer
                                                                // the string should be \n terminated
#define svc_setangle            10      // [angle3] set the view angle to this absolute value

#define svc_serverinfo          11      // [long] version
                                                // [string] signon string
                                                // [string]..[0]model cache
                                                // [string]...[0]sounds cache
#define svc_lightstyle          12      // [byte] [string]
#define svc_updatename          13      // [byte] [string]
#define svc_updatefrags         14      // [byte] [short]
#define svc_clientdata          15      // <shortbits + data>
#define svc_stopsound           16      // <see code>
#define svc_updatecolors        17      // [byte] [byte]
#define svc_particle            18      // [vec3] <variable>
#define svc_damage                      19

#define svc_spawnstatic         20
//      svc_spawnbinary         21
#define svc_spawnbaseline       22

#define svc_temp_entity         23

#define svc_setpause            24      // [byte] on / off
#define svc_signonnum           25      // [byte]  used for the signon sequence

#define svc_centerprint         26      // [string] to put in center of the screen

#define svc_killedmonster       27
#define svc_foundsecret         28

#define svc_spawnstaticsound    29      // [coord3] [byte] samp [byte] vol [byte] aten

#define svc_intermission        30              // [string] music
#define svc_finale                      31              // [string] music [string] text

#define svc_cdtrack                     32              // [byte] track [byte] looptrack
#define svc_sellscreen          33

#define svc_cutscene            34

#define svc_showlmp                     35              // [string] slotname [string] lmpfilename [short] x [short] y
#define svc_hidelmp                     36              // [string] slotname
#define svc_skybox                      37              // [string] skyname

// LordHavoc: my svc_ range, 50-59
#define svc_cgame                       50              // [short] length [bytes] data
#define svc_unusedlh1           51
#define svc_effect                      52              // [vector] org [byte] modelindex [byte] startframe [byte] framecount [byte] framerate
#define svc_effect2                     53              // [vector] org [short] modelindex [short] startframe [byte] framecount [byte] framerate
#define svc_sound2                      54              // short soundindex instead of byte
#define svc_spawnbaseline2      55              // short modelindex instead of byte
#define svc_spawnstatic2        56              // short modelindex instead of byte
#define svc_entities            57              // [int] deltaframe [int] thisframe [float vector] eye [variable length] entitydata
#define svc_unusedlh3                   58
#define svc_spawnstaticsound2   59      // [coord3] [short] samp [byte] vol [byte] aten

//
// client to server
//
#define clc_bad                 0
#define clc_nop                 1
#define clc_disconnect  2
#define clc_move                3                       // [usercmd_t]
#define clc_stringcmd   4               // [string] message

// LordHavoc: my clc_ range, 50-59
#define clc_ackentities 50              // [int] framenumber
#define clc_unusedlh1   51
#define clc_unusedlh2   52
#define clc_unusedlh3   53
#define clc_unusedlh4   54
#define clc_unusedlh5   55
#define clc_unusedlh6   56
#define clc_unusedlh7   57
#define clc_unusedlh8   58
#define clc_unusedlh9   59

//
// temp entity events
//
#define TE_SPIKE                        0 // [vector] origin
#define TE_SUPERSPIKE           1 // [vector] origin
#define TE_GUNSHOT                      2 // [vector] origin
#define TE_EXPLOSION            3 // [vector] origin
#define TE_TAREXPLOSION         4 // [vector] origin
#define TE_LIGHTNING1           5 // [entity] entity [vector] start [vector] end
#define TE_LIGHTNING2           6 // [entity] entity [vector] start [vector] end
#define TE_WIZSPIKE                     7 // [vector] origin
#define TE_KNIGHTSPIKE          8 // [vector] origin
#define TE_LIGHTNING3           9 // [entity] entity [vector] start [vector] end
#define TE_LAVASPLASH           10 // [vector] origin
#define TE_TELEPORT                     11 // [vector] origin
#define TE_EXPLOSION2           12 // [vector] origin [byte] startcolor [byte] colorcount

// PGM 01/21/97
#define TE_BEAM                         13 // [entity] entity [vector] start [vector] end
// PGM 01/21/97

// Nehahra effects used in the movie (TE_EXPLOSION3 also got written up in a QSG tutorial, hence it's not marked NEH)
#define TE_EXPLOSION3           16 // [vector] origin [coord] red [coord] green [coord] blue
#define TE_LIGHTNING4NEH        17 // [string] model [entity] entity [vector] start [vector] end

// LordHavoc: added some TE_ codes (block1 - 50-60)
#define TE_BLOOD                        50 // [vector] origin [byte] xvel [byte] yvel [byte] zvel [byte] count
#define TE_SPARK                        51 // [vector] origin [byte] xvel [byte] yvel [byte] zvel [byte] count
#define TE_BLOODSHOWER          52 // [vector] min [vector] max [coord] explosionspeed [short] count
#define TE_EXPLOSIONRGB         53 // [vector] origin [byte] red [byte] green [byte] blue
#define TE_PARTICLECUBE         54 // [vector] min [vector] max [vector] dir [short] count [byte] color [byte] gravity [coord] randomvel
#define TE_PARTICLERAIN         55 // [vector] min [vector] max [vector] dir [short] count [byte] color
#define TE_PARTICLESNOW         56 // [vector] min [vector] max [vector] dir [short] count [byte] color
#define TE_GUNSHOTQUAD          57 // [vector] origin
#define TE_SPIKEQUAD            58 // [vector] origin
#define TE_SUPERSPIKEQUAD       59 // [vector] origin
// LordHavoc: block2 - 70-80
#define TE_EXPLOSIONQUAD        70 // [vector] origin
#define TE_BLOOD2                       71 // [vector] origin
#define TE_SMALLFLASH           72 // [vector] origin
#define TE_CUSTOMFLASH          73 // [vector] origin [byte] radius / 8 - 1 [byte] lifetime / 256 - 1 [byte] red [byte] green [byte] blue
#define TE_FLAMEJET                     74 // [vector] origin [vector] velocity [byte] count
#define TE_PLASMABURN           75 // [vector] origin
// LordHavoc: Tei grabbed these codes
#define TE_TEI_G3                       76 // [vector] start [vector] end [vector] angles
#define TE_TEI_SMOKE            77 // [vector] origin [vector] dir [byte] count
#define TE_TEI_BIGEXPLOSION     78 // [vector] origin
#define TE_TEI_PLASMAHIT        79 // [vector} origin [vector] dir [byte] count


// these are bits for the 'flags' field of the entity_state_t
#define RENDER_STEP 1
#define RENDER_GLOWTRAIL 2
#define RENDER_VIEWMODEL 4
#define RENDER_EXTERIORMODEL 8
#define RENDER_LOWPRECISION 16 // send as low precision coordinates to save bandwidth
#define RENDER_COLORMAPPED 32
#define RENDER_SHADOW 64 // cast shadow

typedef struct
{
        double time; // time this state was built
        vec3_t origin;
        vec3_t angles;
        int number; // entity number this state is for
        unsigned short active; // true if a valid state
        unsigned short modelindex;
        unsigned short frame;
        unsigned short effects;
        qbyte colormap;
        qbyte skin;
        qbyte alpha;
        qbyte scale;
        qbyte glowsize;
        qbyte glowcolor;
        qbyte flags;
}
entity_state_t;

typedef struct
{
        double time;
        int framenum;
        int firstentity; // index into entitydata, modulo MAX_ENTITY_DATABASE
        int endentity; // index into entitydata, firstentity + numentities
}
entity_frameinfo_t;

#define MAX_ENTITY_HISTORY 64
#define MAX_ENTITY_DATABASE 4096

typedef struct
{
        // note: these can be far out of range, modulo with MAX_ENTITY_DATABASE to get a valid range (which may wrap)
        // start and end of used area, when adding a new update to database, store at endpos, and increment endpos
        // when removing updates from database, nudge down frames array to only contain useful frames
        // this logic should explain better:
        // if (numframes >= MAX_ENTITY_HISTORY || (frames[numframes - 1].endentity - frames[0].firstentity) + entitiestoadd > MAX_ENTITY_DATABASE)
        //     flushdatabase();
        // note: if numframes == 0, insert at start (0 in entitydata)
        // the only reason this system is used is to avoid copying memory when frames are removed
        int numframes;
        int ackframe; // server only: last acknowledged frame
        vec3_t eye;
        entity_frameinfo_t frames[MAX_ENTITY_HISTORY];
        entity_state_t entitydata[MAX_ENTITY_DATABASE];
}
entity_database_t;

// build entity data in this, to pass to entity read/write functions
typedef struct
{
        double time;
        int framenum;
        int numentities;
        vec3_t eye;
        entity_state_t entitydata[MAX_ENTITY_DATABASE];
}
entity_frame_t;

// LordHavoc: these are in approximately sorted order, according to cost and
// likelyhood of being used for numerous objects in a frame

// note that the bytes are not written/read in this order, this is only the
// order of the bits to minimize overhead from extend bytes

// enough to describe a nail, gib, shell casing, bullet hole, or rocket
#define E_ORIGIN1               (1<<0)
#define E_ORIGIN2               (1<<1)
#define E_ORIGIN3               (1<<2)
#define E_ANGLE1                (1<<3)
#define E_ANGLE2                (1<<4)
#define E_ANGLE3                (1<<5)
#define E_MODEL1                (1<<6)
#define E_EXTEND1               (1<<7)

// enough to describe almost anything
#define E_FRAME1                (1<<8)
#define E_EFFECTS1              (1<<9)
#define E_ALPHA                 (1<<10)
#define E_SCALE                 (1<<11)
#define E_COLORMAP              (1<<12)
#define E_SKIN                  (1<<13)
#define E_FLAGS                 (1<<14)
#define E_EXTEND2               (1<<15)

// players, custom color glows, high model numbers
#define E_FRAME2                (1<<16)
#define E_MODEL2                (1<<17)
#define E_EFFECTS2              (1<<18)
#define E_GLOWSIZE              (1<<19)
#define E_GLOWCOLOR             (1<<20)
#define E_UNUSED1               (1<<21)
#define E_UNUSED2               (1<<22)
#define E_EXTEND3               (1<<23)

#define E_SOUND1                (1<<24)
#define E_SOUNDVOL              (1<<25)
#define E_SOUNDATTEN    (1<<26)
#define E_UNUSED4               (1<<27)
#define E_UNUSED5               (1<<28)
#define E_UNUSED6               (1<<29)
#define E_UNUSED7               (1<<30)
#define E_EXTEND4               (1<<31)

void ClearStateToDefault(entity_state_t *s);
// (server) clears the database to contain no frames (thus delta compression
// compresses against nothing)
void EntityFrame_ClearDatabase(entity_database_t *d);
// (server and client) removes frames older than 'frame' from database
void EntityFrame_AckFrame(entity_database_t *d, int frame);
// (server) clears frame, to prepare for adding entities
void EntityFrame_Clear(entity_frame_t *f, vec3_t eye);
// (server) allocates an entity slot in frame, returns NULL if full
entity_state_t *EntityFrame_NewEntity(entity_frame_t *f, int number);
// (server and client) reads a frame from the database
void EntityFrame_FetchFrame(entity_database_t *d, int framenum, entity_frame_t *f);
// (server and client) adds a entity_frame to the database, for future
// reference
void EntityFrame_AddFrame(entity_database_t *d, entity_frame_t *f);
// (server) writes a frame to network stream
void EntityFrame_Write(entity_database_t *d, entity_frame_t *f, sizebuf_t *msg);
// (client) reads a frame from network stream
void EntityFrame_Read(entity_database_t *d);
// (client) returns the frame number of the most recent frame recieved
int EntityFrame_MostRecentlyRecievedFrameNum(entity_database_t *d);

#endif