[xonotic/darkplaces.git] / client.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.

*/
// client.h

#ifndef CLIENT_H
#define CLIENT_H

#include "matrixlib.h"

// LordHavoc: 256 dynamic lights
#define MAX_DLIGHTS 256

// this is the maximum number of input packets that can be predicted
#define CL_MAX_USERCMDS 256

// flags for rtlight rendering
#define LIGHTFLAG_NORMALMODE 1
#define LIGHTFLAG_REALTIMEMODE 2

typedef struct effect_s
{
        int active;
        vec3_t origin;
        float starttime;
        float framerate;
        int modelindex;
        int startframe;
        int endframe;
        // these are for interpolation
        int frame;
        double frame1time;
        double frame2time;
}
cl_effect_t;

typedef struct beam_s
{
        int             entity;
        // draw this as lightning polygons, or a model?
        int             lightning;
        struct model_s  *model;
        float   endtime;
        vec3_t  start, end;
}
beam_t;

typedef struct rtlight_s
{
        // shadow volumes are done entirely in model space, so there are no matrices for dealing with them...  they just use the origin

        // note that the world to light matrices are inversely scaled (divided) by lightradius

        // core properties
        // matrix for transforming light filter coordinates to world coordinates
        matrix4x4_t matrix_lighttoworld;
        // matrix for transforming world coordinates to light filter coordinates
        matrix4x4_t matrix_worldtolight;
        // typically 1 1 1, can be lower (dim) or higher (overbright)
        vec3_t color;
        // size of the light (remove?)
        vec_t radius;
        // light filter
        char cubemapname[64];
        // light style to monitor for brightness
        int style;
        // whether light should render shadows
        int shadow;
        // intensity of corona to render
        vec_t corona;
        // radius scale of corona to render (1.0 means same as light radius)
        vec_t coronasizescale;
        // ambient intensity to render
        vec_t ambientscale;
        // diffuse intensity to render
        vec_t diffusescale;
        // specular intensity to render
        vec_t specularscale;
        // LIGHTFLAG_* flags
        int flags;

        // generated properties
        // used only for shadow volumes
        vec3_t shadoworigin;
        // culling
        vec3_t cullmins;
        vec3_t cullmaxs;
        // culling
        //vec_t cullradius;
        // squared cullradius
        //vec_t cullradius2;

        // rendering properties, updated each time a light is rendered
        // this is rtlight->color * d_lightstylevalue
        vec3_t currentcolor;
        // this is R_Shadow_Cubemap(rtlight->cubemapname)
        rtexture_t *currentcubemap;

        // static light info
        // true if this light should be compiled as a static light
        int isstatic;
        // true if this is a compiled world light, cleared if the light changes
        int compiled;
        // premade shadow volumes to render for world entity
        shadowmesh_t *static_meshchain_shadow;
        // used for visibility testing (more exact than bbox)
        int static_numleafs;
        int static_numleafpvsbytes;
        int *static_leaflist;
        unsigned char *static_leafpvs;
        // surfaces seen by light
        int static_numsurfaces;
        int *static_surfacelist;
        // flag bits indicating which triangles of the world model should cast
        // shadows, and which ones should be lit
        //
        // this avoids redundantly scanning the triangles in each surface twice
        // for whether they should cast shadows, once in culling and once in the
        // actual shadowmarklist production.
        int static_numshadowtrispvsbytes;
        unsigned char *static_shadowtrispvs;
        // this allows the lighting batch code to skip backfaces andother culled
        // triangles not relevant for lighting
        // (important on big surfaces such as terrain)
        int static_numlighttrispvsbytes;
        unsigned char *static_lighttrispvs;
}
rtlight_t;

typedef struct dlight_s
{
        // destroy light after this time
        // (dlight only)
        vec_t die;
        // the entity that owns this light (can be NULL)
        // (dlight only)
        struct entity_render_s *ent;
        // location
        // (worldlight: saved to .rtlights file)
        vec3_t origin;
        // worldlight orientation
        // (worldlight only)
        // (worldlight: saved to .rtlights file)
        vec3_t angles;
        // dlight orientation/scaling/location
        // (dlight only)
        matrix4x4_t matrix;
        // color of light
        // (worldlight: saved to .rtlights file)
        vec3_t color;
        // cubemap name to use on this light
        // (worldlight: saved to .rtlights file)
        char cubemapname[64];
        // make light flash while selected
        // (worldlight only)
        int selected;
        // brightness (not really radius anymore)
        // (worldlight: saved to .rtlights file)
        vec_t radius;
        // drop intensity this much each second
        // (dlight only)
        vec_t decay;
        // intensity value which is dropped over time
        // (dlight only)
        vec_t intensity;
        // initial values for intensity to modify
        // (dlight only)
        vec_t initialradius;
        vec3_t initialcolor;
        // light style which controls intensity of this light
        // (worldlight: saved to .rtlights file)
        int style;
        // cast shadows
        // (worldlight: saved to .rtlights file)
        int shadow;
        // corona intensity
        // (worldlight: saved to .rtlights file)
        vec_t corona;
        // radius scale of corona to render (1.0 means same as light radius)
        // (worldlight: saved to .rtlights file)
        vec_t coronasizescale;
        // ambient intensity to render
        // (worldlight: saved to .rtlights file)
        vec_t ambientscale;
        // diffuse intensity to render
        // (worldlight: saved to .rtlights file)
        vec_t diffusescale;
        // specular intensity to render
        // (worldlight: saved to .rtlights file)
        vec_t specularscale;
        // LIGHTFLAG_* flags
        // (worldlight: saved to .rtlights file)
        int flags;
        // linked list of world lights
        // (worldlight only)
        struct dlight_s *next;
        // embedded rtlight struct for renderer
        // (worldlight only)
        rtlight_t rtlight;
}
dlight_t;

typedef struct frameblend_s
{
        int frame;
        float lerp;
}
frameblend_t;

// LordHavoc: this struct is intended for the renderer but some fields are
// used by the client.
//
// The renderer should not rely on any changes to this struct to be persistent
// across multiple frames because temp entities are wiped every frame, but it
// is acceptable to cache things in this struct that are not critical.
//
// For example the r_cullentities_trace code does such caching.
typedef struct entity_render_s
{
        // location
        //vec3_t origin;
        // orientation
        //vec3_t angles;
        // transform matrix for model to world
        matrix4x4_t matrix;
        // transform matrix for world to model
        matrix4x4_t inversematrix;
        // opacity (alpha) of the model
        float alpha;
        // size the model is shown
        float scale;

        // NULL = no model
        dp_model_t *model;
        // number of the entity represents, or 0 for non-network entities
        int entitynumber;
        // literal colormap colors for renderer, if both are 0 0 0 it is not colormapped
        vec3_t colormap_pantscolor;
        vec3_t colormap_shirtcolor;
        // light, particles, etc
        int effects;
        // qw CTF flags and other internal-use-only effect bits
        int internaleffects;
        // for Alias models
        int skinnum;
        // render flags
        int flags;

        // colormod tinting of models
        float colormod[3];

        // interpolated animation

        // frame that the model is interpolating from
        int frame1;
        // frame that the model is interpolating to
        int frame2;
        // interpolation factor, usually computed from frame2time
        float framelerp;
        // time frame1 began playing (for framegroup animations)
        double frame1time;
        // time frame2 began playing (for framegroup animations)
        double frame2time;

        // calculated by the renderer (but not persistent)

        // calculated during R_AddModelEntities
        vec3_t mins, maxs;
        // 4 frame numbers (-1 if not used) and their blending scalers (0-1), if interpolation is not desired, use frame instead
        frameblend_t frameblend[4];

        // current lighting from map (updated ONLY by client code, not renderer)
        vec3_t modellight_ambient;
        vec3_t modellight_diffuse; // q3bsp
        vec3_t modellight_lightdir; // q3bsp

        // FIELDS UPDATED BY RENDERER:
        // last time visible during trace culling
        double last_trace_visibility;
}
entity_render_t;

typedef struct entity_persistent_s
{
        vec3_t trail_origin;

        // particle trail
        float trail_time;
        qboolean trail_allowed; // set to false by teleports, true by update code, prevents bad lerps

        // muzzleflash fading
        float muzzleflash;

        // interpolated movement

        // start time of move
        float lerpstarttime;
        // time difference from start to end of move
        float lerpdeltatime;
        // the move itself, start and end
        float oldorigin[3];
        float oldangles[3];
        float neworigin[3];
        float newangles[3];
}
entity_persistent_t;

typedef struct entity_s
{
        // baseline state (default values)
        entity_state_t state_baseline;
        // previous state (interpolating from this)
        entity_state_t state_previous;
        // current state (interpolating to this)
        entity_state_t state_current;

        // used for regenerating parts of render
        entity_persistent_t persistent;

        // the only data the renderer should know about
        entity_render_t render;
}
entity_t;

typedef struct usercmd_s
{
        vec3_t  viewangles;

// intended velocities
        float   forwardmove;
        float   sidemove;
        float   upmove;

        vec3_t  cursor_screen;
        vec3_t  cursor_start;
        vec3_t  cursor_end;
        vec3_t  cursor_impact;
        vec3_t  cursor_normal;
        vec_t   cursor_fraction;
        int             cursor_entitynumber;

        double time; // time the move is executed for (cl_movement: clienttime, non-cl_movement: receivetime)
        double receivetime; // time the move was received at
        double clienttime; // time to which server state the move corresponds to
        int msec; // for predicted moves
        int buttons;
        int impulse;
        int sequence;
        qboolean applied; // if false we're still accumulating a move
        qboolean predicted; // if true the sequence should be sent as 0

        // derived properties
        double frametime;
        qboolean canjump;
        qboolean jump;
        qboolean crouch;
} usercmd_t;

typedef struct lightstyle_s
{
        int             length;
        char    map[MAX_STYLESTRING];
} lightstyle_t;

typedef struct scoreboard_s
{
        char    name[MAX_SCOREBOARDNAME];
        int             frags;
        int             colors; // two 4 bit fields
        // QW fields:
        int             qw_userid;
        char    qw_userinfo[MAX_USERINFO_STRING];
        float   qw_entertime;
        int             qw_ping;
        int             qw_packetloss;
        int             qw_spectator;
        char    qw_team[8];
        char    qw_skin[MAX_QPATH];
} scoreboard_t;

typedef struct cshift_s
{
        float   destcolor[3];
        float   percent;                // 0-255
        float   alphafade;      // (any speed)
} cshift_t;

#define CSHIFT_CONTENTS 0
#define CSHIFT_DAMAGE   1
#define CSHIFT_BONUS    2
#define CSHIFT_POWERUP  3
#define CSHIFT_VCSHIFT  4
#define NUM_CSHIFTS             5

#define NAME_LENGTH     64


//
// client_state_t should hold all pieces of the client state
//

#define SIGNONS         4                       // signon messages to receive before connected

#define MAX_DEMOS               8
#define MAX_DEMONAME    16

typedef enum cactive_e
{
        ca_uninitialized,       // during early startup
        ca_dedicated,           // a dedicated server with no ability to start a client
        ca_disconnected,        // full screen console with no connection
        ca_connected            // valid netcon, talking to a server
}
cactive_t;

typedef enum qw_downloadtype_e
{
        dl_none,
        dl_single,
        dl_skin,
        dl_model,
        dl_sound
}
qw_downloadtype_t;

typedef enum capturevideoformat_e
{
        CAPTUREVIDEOFORMAT_AVI_I420
}
capturevideoformat_t;

typedef struct capturevideostate_s
{
        double starttime;
        double framerate;
        // for AVI saving some values have to be written after capture ends
        fs_offset_t videofile_firstchunkframes_offset;
        fs_offset_t videofile_totalframes_offset1;
        fs_offset_t videofile_totalframes_offset2;
        fs_offset_t videofile_totalsampleframes_offset;
        int videofile_ix_master_audio_inuse;
        fs_offset_t videofile_ix_master_audio_inuse_offset;
        fs_offset_t videofile_ix_master_audio_start_offset;
        int videofile_ix_master_video_inuse;
        fs_offset_t videofile_ix_master_video_inuse_offset;
        fs_offset_t videofile_ix_master_video_start_offset;
        fs_offset_t videofile_ix_movistart;
        fs_offset_t position;
        qfile_t *videofile;
        qboolean active;
        qboolean realtime;
        qboolean error;
        qboolean canseek;
        capturevideoformat_t format;
        int soundrate;
        int frame;
        int soundsampleframe; // for AVI saving
        unsigned char *screenbuffer;
        unsigned char *outbuffer;
        sizebuf_t riffbuffer;
        unsigned char riffbufferdata[128];
        // note: riffindex buffer has an allocated ->data member, not static like most!
        sizebuf_t riffindexbuffer;
        int riffstacklevel;
        fs_offset_t riffstackstartoffset[4];
        fs_offset_t riffstacksizehint[4];
        const char *riffstackfourcc[4];
        short rgbtoyuvscaletable[3][3][256];
        unsigned char yuvnormalizetable[3][256];
        char basename[64];
        int width, height;
}
capturevideostate_t;

#define CL_MAX_DOWNLOADACKS 4

typedef struct cl_downloadack_s
{
        int start, size;
}
cl_downloadack_t;

typedef struct cl_soundstats_s
{
        int mixedsounds;
        int totalsounds;
        int latency_milliseconds;
}
cl_soundstats_t;

//
// the client_static_t structure is persistent through an arbitrary number
// of server connections
//
typedef struct client_static_s
{
        cactive_t state;

        // all client memory allocations go in these pools
        mempool_t *levelmempool;
        mempool_t *permanentmempool;

// demo loop control
        // -1 = don't play demos
        int demonum;
        // list of demos in loop
        char demos[MAX_DEMOS][MAX_DEMONAME];
        // the actively playing demo (set by CL_PlayDemo_f)
        char demoname[MAX_QPATH];

// demo recording info must be here, because record is started before
// entering a map (and clearing client_state_t)
        qboolean demorecording;
        fs_offset_t demo_lastcsprogssize;
        int demo_lastcsprogscrc;
        qboolean demoplayback;
        qboolean timedemo;
        // -1 = use normal cd track
        int forcetrack;
        qfile_t *demofile;
        // realtime at second frame of timedemo (LordHavoc: changed to double)
        double td_starttime;
        int td_frames; // total frames parsed
        double td_onesecondnexttime;
        double td_onesecondframes;
        double td_onesecondrealtime;
        double td_onesecondminfps;
        double td_onesecondmaxfps;
        double td_onesecondavgfps;
        int td_onesecondavgcount;
        // LordHavoc: pausedemo
        qboolean demopaused;

        // sound mixer statistics for showsound display
        cl_soundstats_t soundstats;

        qboolean connect_trying;
        int connect_remainingtries;
        double connect_nextsendtime;
        lhnetsocket_t *connect_mysocket;
        lhnetaddress_t connect_address;
        // protocol version of the server we're connected to
        // (kept outside client_state_t because it's used between levels)
        protocolversion_t protocol;

// connection information
        // 0 to SIGNONS
        int signon;
        // network connection
        netconn_t *netcon;

        // download information
        // (note: qw_download variables are also used)
        cl_downloadack_t dp_downloadack[CL_MAX_DOWNLOADACKS];

        // input sequence numbers are not reset on level change, only connect
        int movesequence;
        int servermovesequence;

        // quakeworld stuff below

        // value of "qport" cvar at time of connection
        int qw_qport;
        // copied from cls.netcon->qw. variables every time they change, or set by demos (which have no cls.netcon)
        int qw_incoming_sequence;
        int qw_outgoing_sequence;

        // current file download buffer (only saved when file is completed)
        char qw_downloadname[MAX_QPATH];
        unsigned char *qw_downloadmemory;
        int qw_downloadmemorycursize;
        int qw_downloadmemorymaxsize;
        int qw_downloadnumber;
        int qw_downloadpercent;
        qw_downloadtype_t qw_downloadtype;
        // transfer rate display
        double qw_downloadspeedtime;
        int qw_downloadspeedcount;
        int qw_downloadspeedrate;
        qboolean qw_download_deflate;

        // current file upload buffer (for uploading screenshots to server)
        unsigned char *qw_uploaddata;
        int qw_uploadsize;
        int qw_uploadpos;

        // user infostring
        // this normally contains the following keys in quakeworld:
        // password spectator name team skin topcolor bottomcolor rate noaim msg *ver *ip
        char userinfo[MAX_USERINFO_STRING];

        // video capture stuff
        capturevideostate_t capturevideo;
}
client_static_t;

extern client_static_t  cls;

typedef struct client_movementqueue_s
{
        double time;
        float frametime;
        int sequence;
        float viewangles[3];
        float move[3];
        qboolean jump;
        qboolean crouch;
        qboolean canjump;
}
client_movementqueue_t;

//[515]: csqc
typedef struct
{
        qboolean drawworld;
        qboolean drawenginesbar;
        qboolean drawcrosshair;
}csqc_vidvars_t;

typedef enum
{
        PARTICLE_BILLBOARD = 0,
        PARTICLE_SPARK = 1,
        PARTICLE_ORIENTED_DOUBLESIDED = 2,
        PARTICLE_BEAM = 3,
        PARTICLE_INVALID = -1
}
porientation_t;

typedef enum
{
        PBLEND_ALPHA = 0,
        PBLEND_ADD = 1,
        PBLEND_INVMOD = 2,
        PBLEND_INVALID = -1
}
pblend_t;

typedef struct particletype_s
{
        pblend_t blendmode;
        porientation_t orientation;
        qboolean lighting;
}
particletype_t;

typedef enum
{
        pt_dead, pt_alphastatic, pt_static, pt_spark, pt_beam, pt_rain, pt_raindecal, pt_snow, pt_bubble, pt_blood, pt_smoke, pt_decal, pt_entityparticle, pt_total
}
ptype_t;

typedef struct decal_s
{
        // fields used by rendering:  (40 bytes)
        unsigned short  typeindex;
        unsigned short  texnum;
        vec3_t                  org;
        vec3_t                  normal;
        float                   size;
        float                   alpha; // 0-255
        unsigned char   color[3];
        unsigned char   unused1;

        // fields not used by rendering: (36 bytes in 32bit, 40 bytes in 64bit)
        float                   time2; // used for decal fade
        unsigned int    owner; // decal stuck to this entity
        dp_model_t                      *ownermodel; // model the decal is stuck to (used to make sure the entity is still alive)
        vec3_t                  relativeorigin; // decal at this location in entity's coordinate space
        vec3_t                  relativenormal; // decal oriented this way relative to entity's coordinate space
}
decal_t;

typedef struct particle_s
{
        // fields used by rendering: (40 bytes)
        unsigned char   typeindex;
        pblend_t   blendmode;
        porientation_t   orientation;
        unsigned char   texnum;
        vec3_t                  org;
        vec3_t                  vel; // velocity of particle, or orientation of decal, or end point of beam
        float                   size;
        float                   alpha; // 0-255
        unsigned char   color[3];
        unsigned char   qualityreduction; // enables skipping of this particle according to r_refdef.view.qualityreduction
        float           stretch; // only for sparks

        // fields not used by rendering:  (40 bytes)
        float                   sizeincrease; // rate of size change per second
        float                   alphafade; // how much alpha reduces per second
        float                   time2; // used for snow fluttering and decal fade
        float                   bounce; // how much bounce-back from a surface the particle hits (0 = no physics, 1 = stop and slide, 2 = keep bouncing forever, 1.5 is typical)
        float                   gravity; // how much gravity affects this particle (1.0 = normal gravity, 0.0 = none)
        float                   airfriction; // how much air friction affects this object (objects with a low mass/size ratio tend to get more air friction)
        float                   liquidfriction; // how much liquid friction affects this object (objects with a low mass/size ratio tend to get more liquid friction)
        float                   delayedcollisions; // time that p->bounce becomes active
        float                   delayedspawn; // time that particle appears and begins moving
        float                   die; // time when this particle should be removed, regardless of alpha
}
particle_t;

typedef enum cl_parsingtextmode_e
{
        CL_PARSETEXTMODE_NONE,
        CL_PARSETEXTMODE_PING,
        CL_PARSETEXTMODE_STATUS,
        CL_PARSETEXTMODE_STATUS_PLAYERID,
        CL_PARSETEXTMODE_STATUS_PLAYERIP
}
cl_parsingtextmode_t;

typedef struct cl_locnode_s
{
        struct cl_locnode_s *next;
        char *name;
        vec3_t mins, maxs;
}
cl_locnode_t;

typedef struct showlmp_s
{
        qboolean        isactive;
        float           x;
        float           y;
        char            label[32];
        char            pic[128];
}
showlmp_t;

//
// the client_state_t structure is wiped completely at every
// server signon
//
typedef struct client_state_s
{
        // true if playing in a local game and no one else is connected
        int islocalgame;

        // send a clc_nop periodically until connected
        float sendnoptime;

        // current input being accumulated by mouse/joystick/etc input
        usercmd_t cmd;
        // latest moves sent to the server that have not been confirmed yet
        usercmd_t movecmd[CL_MAX_USERCMDS];

// information for local display
        // health, etc
        int stats[MAX_CL_STATS];
        float *statsf; // points to stats[] array
        // last known inventory bit flags, for blinking
        int olditems;
        // cl.time of acquiring item, for blinking
        float item_gettime[32];
        // last known STAT_ACTIVEWEAPON
        int activeweapon;
        // cl.time of changing STAT_ACTIVEWEAPON
        float weapontime;
        // use pain anim frame if cl.time < this
        float faceanimtime;
        // for stair smoothing
        float stairsmoothz;
        double stairsmoothtime;

        // color shifts for damage, powerups
        cshift_t cshifts[NUM_CSHIFTS];
        // and content types
        cshift_t prev_cshifts[NUM_CSHIFTS];

// the client maintains its own idea of view angles, which are
// sent to the server each frame.  The server sets punchangle when
// the view is temporarily offset, and an angle reset commands at the start
// of each level and after teleporting.

        // mviewangles is read from demo
        // viewangles is either client controlled or lerped from mviewangles
        vec3_t mviewangles[2], viewangles;
        // update by server, used by qc to do weapon recoil
        vec3_t mpunchangle[2], punchangle;
        // update by server, can be used by mods to kick view around
        vec3_t mpunchvector[2], punchvector;
        // update by server, used for lean+bob (0 is newest)
        vec3_t mvelocity[2], velocity;
        // update by server, can be used by mods for zooming
        vec_t mviewzoom[2], viewzoom;
        // if true interpolation the mviewangles and other interpolation of the
        // player is disabled until the next network packet
        // this is used primarily by teleporters, and when spectating players
        // special checking of the old fixangle[1] is used to differentiate
        // between teleporting and spectating
        qboolean fixangle[2];

        // client movement simulation
        // these fields are only updated by CL_ClientMovement (called by CL_SendMove after parsing each network packet)
        // set by CL_ClientMovement_Replay functions
        qboolean movement_predicted;
        // if true the CL_ClientMovement_Replay function will update origin, etc
        qboolean movement_replay;
        // simulated data (this is valid even if cl.movement is false)
        vec3_t movement_origin;
        vec3_t movement_velocity;
        // whether the replay should allow a jump at the first sequence
        qboolean movement_replay_canjump;

// pitch drifting vars
        float idealpitch;
        float pitchvel;
        qboolean nodrift;
        float driftmove;
        double laststop;

//[515]: added for csqc purposes
        float sensitivityscale;
        csqc_vidvars_t csqc_vidvars;    //[515]: these parms must be set to true by default
        qboolean csqc_wantsmousemove;
        struct model_s *csqc_model_precache[MAX_MODELS];

        // local amount for smoothing stepups
        //float crouch;

        // sent by server
        qboolean paused;
        qboolean onground;
        qboolean inwater;

        // used by bob
        qboolean oldonground;
        double lastongroundtime;
        double hitgroundtime;

        // don't change view angle, full screen, etc
        int intermission;
        // latched at intermission start
        double completed_time;

        // the timestamp of the last two messages
        double mtime[2];

        // clients view of time, time should be between mtime[0] and mtime[1] to
        // generate a lerp point for other data, oldtime is the previous frame's
        // value of time, frametime is the difference between time and oldtime
        // note: cl.time may be beyond cl.mtime[0] if packet loss is occuring, it
        // is only forcefully limited when a packet is received
        double time, oldtime;
        // how long it has been since the previous client frame in real time
        // (not game time, for that use cl.time - cl.oldtime)
        double realframetime;

        // copy of realtime from last recieved message, for net trouble icon
        float last_received_message;

// information that is static for the entire time connected to a server
        struct model_s *model_precache[MAX_MODELS];
        struct sfx_s *sound_precache[MAX_SOUNDS];

        // FIXME: this is a lot of memory to be keeping around, this really should be dynamically allocated and freed somehow
        char model_name[MAX_MODELS][MAX_QPATH];
        char sound_name[MAX_SOUNDS][MAX_QPATH];

        // for display on solo scoreboard
        char levelname[40];
        // cl_entitites[cl.viewentity] = player
        int viewentity;
        // the real player entity (normally same as viewentity,
        // different than viewentity if mod uses chasecam or other tricks)
        int realplayerentity;
        // this is updated to match cl.viewentity whenever it is in the clients
        // range, basically this is used in preference to cl.realplayerentity for
        // most purposes because when spectating another player it should show
        // their information rather than yours
        int playerentity;
        // max players that can be in this game
        int maxclients;
        // type of game (deathmatch, coop, singleplayer)
        int gametype;

        // models and sounds used by engine code (particularly cl_parse.c)
        dp_model_t *model_bolt;
        dp_model_t *model_bolt2;
        dp_model_t *model_bolt3;
        dp_model_t *model_beam;
        sfx_t *sfx_wizhit;
        sfx_t *sfx_knighthit;
        sfx_t *sfx_tink1;
        sfx_t *sfx_ric1;
        sfx_t *sfx_ric2;
        sfx_t *sfx_ric3;
        sfx_t *sfx_r_exp3;
        // indicates that the file "sound/misc/talk2.wav" was found (for use by team chat messages)
        qboolean foundtalk2wav;

// refresh related state

        // cl_entitites[0].model
        struct model_s *worldmodel;

        // the gun model
        entity_t viewent;

        // cd audio
        int cdtrack, looptrack;

// frag scoreboard

        // [cl.maxclients]
        scoreboard_t *scores;

        // keep track of svc_print parsing state (analyzes ping reports and status reports)
        cl_parsingtextmode_t parsingtextmode;
        int parsingtextplayerindex;
        // set by scoreboard code when sending ping command, this causes the next ping results to be hidden
        // (which could eat the wrong ping report if the player issues one
        //  manually, but they would still see a ping report, just a later one
        //  caused by the scoreboard code rather than the one they intentionally
        //  issued)
        int parsingtextexpectingpingforscores;

        // entity database stuff
        // latest received entity frame numbers
#define LATESTFRAMENUMS 3
        int latestframenums[LATESTFRAMENUMS];
        entityframe_database_t *entitydatabase;
        entityframe4_database_t *entitydatabase4;
        entityframeqw_database_t *entitydatabaseqw;

        // keep track of quake entities because they need to be killed if they get stale
        int lastquakeentity;
        unsigned char isquakeentity[MAX_EDICTS];

        // bounding boxes for clientside movement
        vec3_t playerstandmins;
        vec3_t playerstandmaxs;
        vec3_t playercrouchmins;
        vec3_t playercrouchmaxs;

        int max_entities;
        int max_static_entities;
        int max_effects;
        int max_beams;
        int max_dlights;
        int max_lightstyle;
        int max_brushmodel_entities;
        int max_particles;
        int max_decals;
        int max_showlmps;

        entity_t *entities;
        unsigned char *entities_active;
        entity_t *static_entities;
        cl_effect_t *effects;
        beam_t *beams;
        dlight_t *dlights;
        lightstyle_t *lightstyle;
        int *brushmodel_entities;
        particle_t *particles;
        decal_t *decals;
        showlmp_t *showlmps;

        int num_entities;
        int num_static_entities;
        int num_brushmodel_entities;
        int num_effects;
        int num_beams;
        int num_dlights;
        int num_particles;
        int num_decals;
        int num_showlmps;

        double particles_updatetime;
        double decals_updatetime;
        int free_particle;
        int free_decal;

        // cl_serverextension_download feature
        int loadmodel_current;
        int downloadmodel_current;
        int loadmodel_total;
        int loadsound_current;
        int downloadsound_current;
        int loadsound_total;
        qboolean downloadcsqc;
        qboolean loadcsqc;
        qboolean loadbegun;
        qboolean loadfinished;

        // quakeworld stuff

        // local copy of the server infostring
        char qw_serverinfo[MAX_SERVERINFO_STRING];

        // time of last qw "pings" command sent to server while showing scores
        double last_ping_request;

        // used during connect
        int qw_servercount;

        // updated from serverinfo
        int qw_teamplay;

        // unused: indicates whether the player is spectating
        // use cl.scores[cl.playerentity-1].qw_spectator instead
        //qboolean qw_spectator;

        // last time an input packet was sent
        double lastpackettime;

        // movement parameters for client prediction
        float movevars_wallfriction;
        float movevars_waterfriction;
        float movevars_friction;
        float movevars_timescale;
        float movevars_gravity;
        float movevars_stopspeed;
        float movevars_maxspeed;
        float movevars_spectatormaxspeed;
        float movevars_accelerate;
        float movevars_airaccelerate;
        float movevars_wateraccelerate;
        float movevars_entgravity;
        float movevars_jumpvelocity;
        float movevars_edgefriction;
        float movevars_maxairspeed;
        float movevars_stepheight;
        float movevars_airaccel_qw;
        float movevars_airaccel_sideways_friction;

        // models used by qw protocol
        int qw_modelindex_spike;
        int qw_modelindex_player;
        int qw_modelindex_flag;
        int qw_modelindex_s_explod;

        vec3_t qw_intermission_origin;
        vec3_t qw_intermission_angles;

        // 255 is the most nails the QW protocol could send
        int qw_num_nails;
        vec_t qw_nails[255][6];

        float qw_weaponkick;

        int qw_validsequence;

        int qw_deltasequence[QW_UPDATE_BACKUP];

        // csqc stuff:
        // server entity number corresponding to a clientside entity
        unsigned short csqc_server2csqcentitynumber[MAX_EDICTS];
        qboolean csqc_loaded;
        vec3_t csqc_origin;
        vec3_t csqc_angles;
        qboolean csqc_usecsqclistener;
        matrix4x4_t csqc_listenermatrix;
        char csqc_printtextbuf[MAX_INPUTLINE];

        // collision culling data
        world_t world;

        // loc file stuff (points and boxes describing locations in the level)
        cl_locnode_t *locnodes;
        // this is updated to cl.movement_origin whenever health is < 1
        // used by %d print in say/say_team messages if cl_locs_enable is on
        vec3_t lastdeathorigin;

        // processing buffer used by R_BuildLightMap, reallocated as needed,
        // freed on each level change
        size_t buildlightmapmemorysize;
        unsigned char *buildlightmapmemory;
}
client_state_t;

//
// cvars
//
extern cvar_t cl_name;
extern cvar_t cl_color;
extern cvar_t cl_rate;
extern cvar_t cl_pmodel;
extern cvar_t cl_playermodel;
extern cvar_t cl_playerskin;

extern cvar_t rcon_password;
extern cvar_t rcon_address;

extern cvar_t cl_upspeed;
extern cvar_t cl_forwardspeed;
extern cvar_t cl_backspeed;
extern cvar_t cl_sidespeed;

extern cvar_t cl_movespeedkey;

extern cvar_t cl_yawspeed;
extern cvar_t cl_pitchspeed;

extern cvar_t cl_anglespeedkey;

extern cvar_t cl_autofire;

extern cvar_t cl_shownet;
extern cvar_t cl_nolerp;
extern cvar_t cl_nettimesyncfactor;
extern cvar_t cl_nettimesyncboundmode;
extern cvar_t cl_nettimesyncboundtolerance;

extern cvar_t cl_pitchdriftspeed;
extern cvar_t lookspring;
extern cvar_t lookstrafe;
extern cvar_t sensitivity;

extern cvar_t freelook;

extern cvar_t m_pitch;
extern cvar_t m_yaw;
extern cvar_t m_forward;
extern cvar_t m_side;

extern cvar_t cl_autodemo;
extern cvar_t cl_autodemo_nameformat;

extern cvar_t r_draweffects;

extern cvar_t cl_explosions_alpha_start;
extern cvar_t cl_explosions_alpha_end;
extern cvar_t cl_explosions_size_start;
extern cvar_t cl_explosions_size_end;
extern cvar_t cl_explosions_lifetime;
extern cvar_t cl_stainmaps;
extern cvar_t cl_stainmaps_clearonload;

extern cvar_t cl_prydoncursor;

extern cvar_t cl_locs_enable;

extern client_state_t cl;

extern void CL_AllocLightFlash (entity_render_t *ent, matrix4x4_t *matrix, float radius, float red, float green, float blue, float decay, float lifetime, int cubemapnum, int style, int shadowenable, vec_t corona, vec_t coronasizescale, vec_t ambientscale, vec_t diffusescale, vec_t specularscale, int flags);

cl_locnode_t *CL_Locs_FindNearest(const vec3_t point);
void CL_Locs_FindLocationName(char *buffer, size_t buffersize, vec3_t point);

//=============================================================================

//
// cl_main
//

void CL_Shutdown (void);
void CL_Init (void);

void CL_EstablishConnection(const char *host);

void CL_Disconnect (void);
void CL_Disconnect_f (void);

void CL_UpdateRenderEntity(entity_render_t *ent);
void CL_SetEntityColormapColors(entity_render_t *ent, int colormap);
void CL_UpdateViewEntities(void);

//
// cl_input
//
typedef struct kbutton_s
{
        int             down[2];                // key nums holding it down
        int             state;                  // low bit is down state
}
kbutton_t;

extern  kbutton_t       in_mlook, in_klook;
extern  kbutton_t       in_strafe;
extern  kbutton_t       in_speed;

void CL_InitInput (void);
void CL_SendMove (void);

void CL_ValidateState(entity_state_t *s);
void CL_MoveLerpEntityStates(entity_t *ent);
void CL_LerpUpdate(entity_t *e);
void CL_ParseTEnt (void);
void CL_NewBeam (int ent, vec3_t start, vec3_t end, dp_model_t *m, int lightning);
void CL_RelinkBeams (void);
void CL_Beam_CalculatePositions (const beam_t *b, vec3_t start, vec3_t end);
void CL_ClientMovement_Replay(void);

void CL_ClearTempEntities (void);
entity_render_t *CL_NewTempEntity (void);

void CL_Effect(vec3_t org, int modelindex, int startframe, int framecount, float framerate);

void CL_ClearState (void);
void CL_ExpandEntities(int num);
void CL_SetInfo(const char *key, const char *value, qboolean send, qboolean allowstarkey, qboolean allowmodel, qboolean quiet);


void CL_UpdateWorld (void);
void CL_WriteToServer (void);
void CL_Input (void);
extern int cl_ignoremousemoves;


float CL_KeyState (kbutton_t *key);
const char *Key_KeynumToString (int keynum);
int Key_StringToKeynum (const char *str);

//
// cl_demo.c
//
void CL_StopPlayback(void);
void CL_ReadDemoMessage(void);
void CL_WriteDemoMessage(sizebuf_t *mesage);

void CL_CutDemo(unsigned char **buf, fs_offset_t *filesize);
void CL_PasteDemo(unsigned char **buf, fs_offset_t *filesize);

void CL_NextDemo(void);
void CL_Stop_f(void);
void CL_Record_f(void);
void CL_PlayDemo_f(void);
void CL_TimeDemo_f(void);

//
// cl_parse.c
//
void CL_Parse_Init(void);
void CL_Parse_Shutdown(void);
void CL_ParseServerMessage(void);
void CL_Parse_DumpPacket(void);
void CL_Parse_ErrorCleanUp(void);
void QW_CL_StartUpload(unsigned char *data, int size);
extern cvar_t qport;

//
// view
//
void V_StartPitchDrift (void);
void V_StopPitchDrift (void);

void V_Init (void);
float V_CalcRoll (vec3_t angles, vec3_t velocity);
void V_UpdateBlends (void);
void V_ParseDamage (void);

//
// cl_part
//

extern cvar_t cl_particles;
extern cvar_t cl_particles_quality;
extern cvar_t cl_particles_size;
extern cvar_t cl_particles_quake;
extern cvar_t cl_particles_blood;
extern cvar_t cl_particles_blood_alpha;
extern cvar_t cl_particles_blood_bloodhack;
extern cvar_t cl_particles_bulletimpacts;
extern cvar_t cl_particles_explosions_sparks;
extern cvar_t cl_particles_explosions_shell;
extern cvar_t cl_particles_rain;
extern cvar_t cl_particles_snow;
extern cvar_t cl_particles_smoke;
extern cvar_t cl_particles_smoke_alpha;
extern cvar_t cl_particles_smoke_alphafade;
extern cvar_t cl_particles_sparks;
extern cvar_t cl_particles_bubbles;
extern cvar_t cl_decals;
extern cvar_t cl_decals_time;
extern cvar_t cl_decals_fadetime;

void CL_Particles_Clear(void);
void CL_Particles_Init(void);
void CL_Particles_Shutdown(void);

typedef enum effectnameindex_s
{
        EFFECT_NONE,
        EFFECT_TE_GUNSHOT,
        EFFECT_TE_GUNSHOTQUAD,
        EFFECT_TE_SPIKE,
        EFFECT_TE_SPIKEQUAD,
        EFFECT_TE_SUPERSPIKE,
        EFFECT_TE_SUPERSPIKEQUAD,
        EFFECT_TE_WIZSPIKE,
        EFFECT_TE_KNIGHTSPIKE,
        EFFECT_TE_EXPLOSION,
        EFFECT_TE_EXPLOSIONQUAD,
        EFFECT_TE_TAREXPLOSION,
        EFFECT_TE_TELEPORT,
        EFFECT_TE_LAVASPLASH,
        EFFECT_TE_SMALLFLASH,
        EFFECT_TE_FLAMEJET,
        EFFECT_EF_FLAME,
        EFFECT_TE_BLOOD,
        EFFECT_TE_SPARK,
        EFFECT_TE_PLASMABURN,
        EFFECT_TE_TEI_G3,
        EFFECT_TE_TEI_SMOKE,
        EFFECT_TE_TEI_BIGEXPLOSION,
        EFFECT_TE_TEI_PLASMAHIT,
        EFFECT_EF_STARDUST,
        EFFECT_TR_ROCKET,
        EFFECT_TR_GRENADE,
        EFFECT_TR_BLOOD,
        EFFECT_TR_WIZSPIKE,
        EFFECT_TR_SLIGHTBLOOD,
        EFFECT_TR_KNIGHTSPIKE,
        EFFECT_TR_VORESPIKE,
        EFFECT_TR_NEHAHRASMOKE,
        EFFECT_TR_NEXUIZPLASMA,
        EFFECT_TR_GLOWTRAIL,
        EFFECT_SVC_PARTICLE,
        EFFECT_TOTAL
}
effectnameindex_t;

int CL_ParticleEffectIndexForName(const char *name);
const char *CL_ParticleEffectNameForIndex(int i);
void CL_ParticleEffect(int effectindex, float pcount, const vec3_t originmins, const vec3_t originmaxs, const vec3_t velocitymins, const vec3_t velocitymaxs, entity_t *ent, int palettecolor);
void CL_ParticleTrail(int effectindex, float pcount, const vec3_t originmins, const vec3_t originmaxs, const vec3_t velocitymins, const vec3_t velocitymaxs, entity_t *ent, int palettecolor, qboolean spawndlight, qboolean spawnparticles);
void CL_ParseParticleEffect (void);
void CL_ParticleCube (const vec3_t mins, const vec3_t maxs, const vec3_t dir, int count, int colorbase, vec_t gravity, vec_t randomvel);
void CL_ParticleRain (const vec3_t mins, const vec3_t maxs, const vec3_t dir, int count, int colorbase, int type);
void CL_EntityParticles (const entity_t *ent);
void CL_ParticleExplosion (const vec3_t org);
void CL_ParticleExplosion2 (const vec3_t org, int colorStart, int colorLength);
void R_NewExplosion(const vec3_t org);

void Debug_PolygonBegin(const char *picname, int flags);
void Debug_PolygonVertex(float x, float y, float z, float s, float t, float r, float g, float b, float a);
void Debug_PolygonEnd(void);

#include "cl_screen.h"

extern qboolean sb_showscores;

float FogPoint_World(const vec3_t p);
float FogPoint_Model(const vec3_t p);
float FogForDistance(vec_t dist);

typedef struct r_refdef_stats_s
{
        int renders;
        int entities;
        int entities_surfaces;
        int entities_triangles;
        int world_leafs;
        int world_portals;
        int world_surfaces;
        int world_triangles;
        int lightmapupdates;
        int lightmapupdatepixels;
        int particles;
        int decals;
        int meshes;
        int meshes_elements;
        int lights;
        int lights_clears;
        int lights_scissored;
        int lights_lighttriangles;
        int lights_shadowtriangles;
        int lights_dynamicshadowtriangles;
        int bloom;
        int bloom_copypixels;
        int bloom_drawpixels;
}
r_refdef_stats_t;

typedef struct r_refdef_view_s
{
        // view information (changes multiple times per frame)
        // if any of these variables change then r_refdef.viewcache must be regenerated
        // by calling R_View_Update
        // (which also updates viewport, scissor, colormask)

        // it is safe and expected to copy this into a structure on the stack and
        // call the renderer recursively, then restore from the stack afterward
        // (as long as R_View_Update is called)

        // eye position information
        matrix4x4_t matrix, inverse_matrix;
        vec3_t origin;
        vec3_t forward;
        vec3_t left;
        vec3_t right;
        vec3_t up;
        int numfrustumplanes;
        mplane_t frustum[6];
        qboolean useclipplane;
        qboolean usecustompvs; // uses r_refdef.viewcache.pvsbits as-is rather than computing it
        mplane_t clipplane;
        float frustum_x, frustum_y;
        vec3_t frustumcorner[4];
        // if turned off it renders an ortho view
        int useperspective;
        float ortho_x, ortho_y;

        // screen area to render in
        int x;
        int y;
        int z;
        int width;
        int height;
        int depth;

        // which color components to allow (for anaglyph glasses)
        int colormask[4];

        // global RGB color multiplier for rendering, this is required by HDR
        float colorscale;

        // whether to call R_ClearScreen before rendering stuff
        qboolean clear;
        // if true, don't clear or do any post process effects (bloom, etc)
        qboolean isoverlay;

        // whether to draw r_showtris and such, this is only true for the main
        // view render, all secondary renders (HDR, mirrors, portals, cameras,
        // distortion effects, etc) omit such debugging information
        qboolean showdebug;

        // these define which values to use in GL_CullFace calls to request frontface or backface culling
        int cullface_front;
        int cullface_back;

        // render quality (0 to 1) - affects r_drawparticles_drawdistance and others
        float quality;
}
r_refdef_view_t;

typedef struct r_refdef_viewcache_s
{
        // these properties are generated by R_View_Update()

        // which entities are currently visible for this viewpoint
        // (the used range is 0...r_refdef.scene.numentities)
        unsigned char entityvisible[MAX_EDICTS];
        // flag arrays used for visibility checking on world model
        // (all other entities have no per-surface/per-leaf visibility checks)
        // TODO: dynamic resize according to r_refdef.scene.worldmodel->brush.num_clusters
        unsigned char world_pvsbits[(32768+7)>>3]; // FIXME: buffer overflow on huge maps
        // TODO: dynamic resize according to r_refdef.scene.worldmodel->brush.num_leafs
        unsigned char world_leafvisible[32768]; // FIXME: buffer overflow on huge maps
        // TODO: dynamic resize according to r_refdef.scene.worldmodel->num_surfaces
        unsigned char world_surfacevisible[262144]; // FIXME: buffer overflow on huge maps
        // if true, the view is currently in a leaf without pvs data
        qboolean world_novis;
}
r_refdef_viewcache_t;

// TODO: really think about which fields should go into scene and which one should stay in refdef [1/7/2008 Black]
// maybe also refactor some of the functions to support different setting sources (ie. fogenabled, etc.) for different scenes
typedef struct r_refdef_scene_s {
        // whether to call S_ExtraUpdate during render to reduce sound chop
        qboolean extraupdate;

        // (client gameworld) time for rendering time based effects
        double time;

        // the world
        entity_render_t *worldentity;

        // same as worldentity->model
        dp_model_t *worldmodel;

        // renderable entities (excluding world)
        entity_render_t **entities;
        int numentities;
        int maxentities;

        // field of temporary entities that is reset each (client) frame
        entity_render_t *tempentities;
        int numtempentities;
        int maxtempentities;

        // renderable dynamic lights
        rtlight_t lights[MAX_DLIGHTS];
        int numlights;

        // intensities for light styles right now, controls rtlights
        float rtlightstylevalue[256];   // float fraction of base light value
        // 8.8bit fixed point intensities for light styles
        // controls intensity lightmap layers
        unsigned short lightstylevalue[256];    // 8.8 fraction of base light value

        float ambient;

        qboolean rtworld;
        qboolean rtworldshadows;
        qboolean rtdlight;
        qboolean rtdlightshadows;
} r_refdef_scene_t;

typedef struct r_refdef_s
{
        // these fields define the basic rendering information for the world
        // but not the view, which could change multiple times in one rendered
        // frame (for example when rendering textures for certain effects)

        // these are set for water warping before
        // frustum_x/frustum_y are calculated
        float frustumscale_x, frustumscale_y;

        // current view settings (these get reset a few times during rendering because of water rendering, reflections, etc)
        r_refdef_view_t view;
        r_refdef_viewcache_t viewcache;

        // minimum visible distance (pixels closer than this disappear)
        double nearclip;
        // maximum visible distance (pixels further than this disappear in 16bpp modes,
        // in 32bpp an infinite-farclip matrix is used instead)
        double farclip;

        // fullscreen color blend
        float viewblend[4];

        r_refdef_scene_t scene;

        vec3_t fogcolor;
        vec_t fogrange;
        vec_t fograngerecip;
        vec_t fogmasktabledistmultiplier;
#define FOGMASKTABLEWIDTH 1024
        float fogmasktable[FOGMASKTABLEWIDTH];
        float fogmasktable_start, fogmasktable_alpha, fogmasktable_range, fogmasktable_density;
        float fog_density;
        float fog_red;
        float fog_green;
        float fog_blue;
        float fog_alpha;
        float fog_start;
        float fog_end;
        qboolean fogenabled;
        qboolean oldgl_fogenable;

        qboolean draw2dstage;

        // true during envmap command capture
        qboolean envmap;

        // brightness of world lightmaps and related lighting
        // (often reduced when world rtlights are enabled)
        float lightmapintensity;
        // whether to draw world lights realtime, dlights realtime, and their shadows
        float polygonfactor;
        float polygonoffset;
        float shadowpolygonfactor;
        float shadowpolygonoffset;

        // rendering stats for r_speeds display
        // (these are incremented in many places)
        r_refdef_stats_t stats;
}
r_refdef_t;

extern r_refdef_t r_refdef;

#endif