cl_input.c

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/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.

This file is part of Quake III Arena source code.

Quake III Arena source code 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.

Quake III Arena source code 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 Foobar; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
===========================================================================
*/
// cl.input.c  -- builds an intended movement command to send to the server

#include "client.h"

unsigned    frame_msec;
int         old_com_frameTime;

/*
===============================================================================

KEY BUTTONS

Continuous button event tracking is complicated by the fact that two different
input sources (say, mouse button 1 and the control key) can both press the
same button, but the button should only be released when both of the
pressing key have been released.

When a key event issues a button command (+forward, +attack, etc), it appends
its key number as argv(1) so it can be matched up with the release.

argv(2) will be set to the time the event happened, which allows exact
control even at low framerates when the down and up events may both get qued
at the same time.

===============================================================================
*/


kbutton_t   in_left, in_right, in_forward, in_back;
kbutton_t   in_lookup, in_lookdown, in_moveleft, in_moveright;
kbutton_t   in_strafe, in_speed;
kbutton_t   in_up, in_down;

kbutton_t   in_buttons[16];


qboolean    in_mlooking;


void IN_MLookDown( void ) {
    in_mlooking = qtrue;
}

void IN_MLookUp( void ) {
    in_mlooking = qfalse;
    if ( !cl_freelook->integer ) {
        IN_CenterView ();
    }
}

void IN_KeyDown( kbutton_t *b ) {
    int     k;
    char    *c;
    
    c = Cmd_Argv(1);
    if ( c[0] ) {
        k = atoi(c);
    } else {
        k = -1;     // typed manually at the console for continuous down
    }

    if ( k == b->down[0] || k == b->down[1] ) {
        return;     // repeating key
    }
    
    if ( !b->down[0] ) {
        b->down[0] = k;
    } else if ( !b->down[1] ) {
        b->down[1] = k;
    } else {
        Com_Printf ("Three keys down for a button!\n");
        return;
    }
    
    if ( b->active ) {
        return;     // still down
    }

    // save timestamp for partial frame summing
    c = Cmd_Argv(2);
    b->downtime = atoi(c);

    b->active = qtrue;
    b->wasPressed = qtrue;
}

void IN_KeyUp( kbutton_t *b ) {
    int     k;
    char    *c;
    unsigned    uptime;

    c = Cmd_Argv(1);
    if ( c[0] ) {
        k = atoi(c);
    } else {
        // typed manually at the console, assume for unsticking, so clear all
        b->down[0] = b->down[1] = 0;
        b->active = qfalse;
        return;
    }

    if ( b->down[0] == k ) {
        b->down[0] = 0;
    } else if ( b->down[1] == k ) {
        b->down[1] = 0;
    } else {
        return;     // key up without coresponding down (menu pass through)
    }
    if ( b->down[0] || b->down[1] ) {
        return;     // some other key is still holding it down
    }

    b->active = qfalse;

    // save timestamp for partial frame summing
    c = Cmd_Argv(2);
    uptime = atoi(c);
    if ( uptime ) {
        b->msec += uptime - b->downtime;
    } else {
        b->msec += frame_msec / 2;
    }

    b->active = qfalse;
}



/*
===============
CL_KeyState

Returns the fraction of the frame that the key was down
===============
*/
float CL_KeyState( kbutton_t *key ) {
    float       val;
    int         msec;

    msec = key->msec;
    key->msec = 0;

    if ( key->active ) {
        // still down
        if ( !key->downtime ) {
            msec = com_frameTime;
        } else {
            msec += com_frameTime - key->downtime;
        }
        key->downtime = com_frameTime;
    }

#if 0
    if (msec) {
        Com_Printf ("%i ", msec);
    }
#endif

    val = (float)msec / frame_msec;
    if ( val < 0 ) {
        val = 0;
    }
    if ( val > 1 ) {
        val = 1;
    }

    return val;
}



void IN_UpDown(void) {IN_KeyDown(&in_up);}
void IN_UpUp(void) {IN_KeyUp(&in_up);}
void IN_DownDown(void) {IN_KeyDown(&in_down);}
void IN_DownUp(void) {IN_KeyUp(&in_down);}
void IN_LeftDown(void) {IN_KeyDown(&in_left);}
void IN_LeftUp(void) {IN_KeyUp(&in_left);}
void IN_RightDown(void) {IN_KeyDown(&in_right);}
void IN_RightUp(void) {IN_KeyUp(&in_right);}
void IN_ForwardDown(void) {IN_KeyDown(&in_forward);}
void IN_ForwardUp(void) {IN_KeyUp(&in_forward);}
void IN_BackDown(void) {IN_KeyDown(&in_back);}
void IN_BackUp(void) {IN_KeyUp(&in_back);}
void IN_LookupDown(void) {IN_KeyDown(&in_lookup);}
void IN_LookupUp(void) {IN_KeyUp(&in_lookup);}
void IN_LookdownDown(void) {IN_KeyDown(&in_lookdown);}
void IN_LookdownUp(void) {IN_KeyUp(&in_lookdown);}
void IN_MoveleftDown(void) {IN_KeyDown(&in_moveleft);}
void IN_MoveleftUp(void) {IN_KeyUp(&in_moveleft);}
void IN_MoverightDown(void) {IN_KeyDown(&in_moveright);}
void IN_MoverightUp(void) {IN_KeyUp(&in_moveright);}

void IN_SpeedDown(void) {IN_KeyDown(&in_speed);}
void IN_SpeedUp(void) {IN_KeyUp(&in_speed);}
void IN_StrafeDown(void) {IN_KeyDown(&in_strafe);}
void IN_StrafeUp(void) {IN_KeyUp(&in_strafe);}

void IN_Button0Down(void) {IN_KeyDown(&in_buttons[0]);}
void IN_Button0Up(void) {IN_KeyUp(&in_buttons[0]);}
void IN_Button1Down(void) {IN_KeyDown(&in_buttons[1]);}
void IN_Button1Up(void) {IN_KeyUp(&in_buttons[1]);}
void IN_Button2Down(void) {IN_KeyDown(&in_buttons[2]);}
void IN_Button2Up(void) {IN_KeyUp(&in_buttons[2]);}
void IN_Button3Down(void) {IN_KeyDown(&in_buttons[3]);}
void IN_Button3Up(void) {IN_KeyUp(&in_buttons[3]);}
void IN_Button4Down(void) {IN_KeyDown(&in_buttons[4]);}
void IN_Button4Up(void) {IN_KeyUp(&in_buttons[4]);}
void IN_Button5Down(void) {IN_KeyDown(&in_buttons[5]);}
void IN_Button5Up(void) {IN_KeyUp(&in_buttons[5]);}
void IN_Button6Down(void) {IN_KeyDown(&in_buttons[6]);}
void IN_Button6Up(void) {IN_KeyUp(&in_buttons[6]);}
void IN_Button7Down(void) {IN_KeyDown(&in_buttons[7]);}
void IN_Button7Up(void) {IN_KeyUp(&in_buttons[7]);}
void IN_Button8Down(void) {IN_KeyDown(&in_buttons[8]);}
void IN_Button8Up(void) {IN_KeyUp(&in_buttons[8]);}
void IN_Button9Down(void) {IN_KeyDown(&in_buttons[9]);}
void IN_Button9Up(void) {IN_KeyUp(&in_buttons[9]);}
void IN_Button10Down(void) {IN_KeyDown(&in_buttons[10]);}
void IN_Button10Up(void) {IN_KeyUp(&in_buttons[10]);}
void IN_Button11Down(void) {IN_KeyDown(&in_buttons[11]);}
void IN_Button11Up(void) {IN_KeyUp(&in_buttons[11]);}
void IN_Button12Down(void) {IN_KeyDown(&in_buttons[12]);}
void IN_Button12Up(void) {IN_KeyUp(&in_buttons[12]);}
void IN_Button13Down(void) {IN_KeyDown(&in_buttons[13]);}
void IN_Button13Up(void) {IN_KeyUp(&in_buttons[13]);}
void IN_Button14Down(void) {IN_KeyDown(&in_buttons[14]);}
void IN_Button14Up(void) {IN_KeyUp(&in_buttons[14]);}
void IN_Button15Down(void) {IN_KeyDown(&in_buttons[15]);}
void IN_Button15Up(void) {IN_KeyUp(&in_buttons[15]);}

void IN_ButtonDown (void) {
    IN_KeyDown(&in_buttons[1]);}
void IN_ButtonUp (void) {
    IN_KeyUp(&in_buttons[1]);}

void IN_CenterView (void) {
    cl.viewangles[PITCH] = -SHORT2ANGLE(cl.snap.ps.delta_angles[PITCH]);
}


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

cvar_t  *cl_upspeed;
cvar_t  *cl_forwardspeed;
cvar_t  *cl_sidespeed;

cvar_t  *cl_yawspeed;
cvar_t  *cl_pitchspeed;

cvar_t  *cl_run;

cvar_t  *cl_anglespeedkey;


/*
================
CL_AdjustAngles

Moves the local angle positions
================
*/
void CL_AdjustAngles( void ) {
    float   speed;
    
    if ( in_speed.active ) {
        speed = 0.001 * cls.frametime * cl_anglespeedkey->value;
    } else {
        speed = 0.001 * cls.frametime;
    }

    if ( !in_strafe.active ) {
        cl.viewangles[YAW] -= speed*cl_yawspeed->value*CL_KeyState (&in_right);
        cl.viewangles[YAW] += speed*cl_yawspeed->value*CL_KeyState (&in_left);
    }

    cl.viewangles[PITCH] -= speed*cl_pitchspeed->value * CL_KeyState (&in_lookup);
    cl.viewangles[PITCH] += speed*cl_pitchspeed->value * CL_KeyState (&in_lookdown);
}

/*
================
CL_KeyMove

Sets the usercmd_t based on key states
================
*/
void CL_KeyMove( usercmd_t *cmd ) {
    int     movespeed;
    int     forward, side, up;

    //
    // adjust for speed key / running
    // the walking flag is to keep animations consistant
    // even during acceleration and develeration
    //
    if ( in_speed.active ^ cl_run->integer ) {
        movespeed = 127;
        cmd->buttons &= ~BUTTON_WALKING;
    } else {
        cmd->buttons |= BUTTON_WALKING;
        movespeed = 64;
    }

    forward = 0;
    side = 0;
    up = 0;
    if ( in_strafe.active ) {
        side += movespeed * CL_KeyState (&in_right);
        side -= movespeed * CL_KeyState (&in_left);
    }

    side += movespeed * CL_KeyState (&in_moveright);
    side -= movespeed * CL_KeyState (&in_moveleft);


    up += movespeed * CL_KeyState (&in_up);
    up -= movespeed * CL_KeyState (&in_down);

    forward += movespeed * CL_KeyState (&in_forward);
    forward -= movespeed * CL_KeyState (&in_back);

    cmd->forwardmove = ClampChar( forward );
    cmd->rightmove = ClampChar( side );
    cmd->upmove = ClampChar( up );
}

/*
=================
CL_MouseEvent
=================
*/
void CL_MouseEvent( int dx, int dy, int time ) {
    if ( cls.keyCatchers & KEYCATCH_UI ) {
        VM_Call( uivm, UI_MOUSE_EVENT, dx, dy );
    } else if (cls.keyCatchers & KEYCATCH_CGAME) {
        VM_Call (cgvm, CG_MOUSE_EVENT, dx, dy);
    } else {
        cl.mouseDx[cl.mouseIndex] += dx;
        cl.mouseDy[cl.mouseIndex] += dy;
    }
}

/*
=================
CL_JoystickEvent

Joystick values stay set until changed
=================
*/
void CL_JoystickEvent( int axis, int value, int time ) {
    if ( axis < 0 || axis >= MAX_JOYSTICK_AXIS ) {
        Com_Error( ERR_DROP, "CL_JoystickEvent: bad axis %i", axis );
    }
    cl.joystickAxis[axis] = value;
}

/*
=================
CL_JoystickMove
=================
*/
void CL_JoystickMove( usercmd_t *cmd ) {
    int     movespeed;
    float   anglespeed;

    if ( in_speed.active ^ cl_run->integer ) {
        movespeed = 2;
    } else {
        movespeed = 1;
        cmd->buttons |= BUTTON_WALKING;
    }

    if ( in_speed.active ) {
        anglespeed = 0.001 * cls.frametime * cl_anglespeedkey->value;
    } else {
        anglespeed = 0.001 * cls.frametime;
    }

    if ( !in_strafe.active ) {
        cl.viewangles[YAW] += anglespeed * cl_yawspeed->value * cl.joystickAxis[AXIS_SIDE];
    } else {
        cmd->rightmove = ClampChar( cmd->rightmove + cl.joystickAxis[AXIS_SIDE] );
    }

    if ( in_mlooking ) {
        cl.viewangles[PITCH] += anglespeed * cl_pitchspeed->value * cl.joystickAxis[AXIS_FORWARD];
    } else {
        cmd->forwardmove = ClampChar( cmd->forwardmove + cl.joystickAxis[AXIS_FORWARD] );
    }

    cmd->upmove = ClampChar( cmd->upmove + cl.joystickAxis[AXIS_UP] );
}

/*
=================
CL_MouseMove
=================
*/
void CL_MouseMove( usercmd_t *cmd ) {
    float   mx, my;
    float   accelSensitivity;
    float   rate;

    // allow mouse smoothing
    if ( m_filter->integer ) {
        mx = ( cl.mouseDx[0] + cl.mouseDx[1] ) * 0.5;
        my = ( cl.mouseDy[0] + cl.mouseDy[1] ) * 0.5;
    } else {
        mx = cl.mouseDx[cl.mouseIndex];
        my = cl.mouseDy[cl.mouseIndex];
    }
    cl.mouseIndex ^= 1;
    cl.mouseDx[cl.mouseIndex] = 0;
    cl.mouseDy[cl.mouseIndex] = 0;

    rate = sqrt( mx * mx + my * my ) / (float)frame_msec;
    accelSensitivity = cl_sensitivity->value + rate * cl_mouseAccel->value;

    // scale by FOV
    accelSensitivity *= cl.cgameSensitivity;

    if ( rate && cl_showMouseRate->integer ) {
        Com_Printf( "%f : %f\n", rate, accelSensitivity );
    }

    mx *= accelSensitivity;
    my *= accelSensitivity;

    if (!mx && !my) {
        return;
    }

    // add mouse X/Y movement to cmd
    if ( in_strafe.active ) {
        cmd->rightmove = ClampChar( cmd->rightmove + m_side->value * mx );
    } else {
        cl.viewangles[YAW] -= m_yaw->value * mx;
    }

    if ( (in_mlooking || cl_freelook->integer) && !in_strafe.active ) {
        cl.viewangles[PITCH] += m_pitch->value * my;
    } else {
        cmd->forwardmove = ClampChar( cmd->forwardmove - m_forward->value * my );
    }
}


/*
==============
CL_CmdButtons
==============
*/
void CL_CmdButtons( usercmd_t *cmd ) {
    int     i;

    //
    // figure button bits
    // send a button bit even if the key was pressed and released in
    // less than a frame
    //  
    for (i = 0 ; i < 15 ; i++) {
        if ( in_buttons[i].active || in_buttons[i].wasPressed ) {
            cmd->buttons |= 1 << i;
        }
        in_buttons[i].wasPressed = qfalse;
    }

    if ( cls.keyCatchers ) {
        cmd->buttons |= BUTTON_TALK;
    }

    // allow the game to know if any key at all is
    // currently pressed, even if it isn't bound to anything
    if ( anykeydown && !cls.keyCatchers ) {
        cmd->buttons |= BUTTON_ANY;
    }
}


/*
==============
CL_FinishMove
==============
*/
void CL_FinishMove( usercmd_t *cmd ) {
    int     i;

    // copy the state that the cgame is currently sending
    cmd->weapon = cl.cgameUserCmdValue;

    // send the current server time so the amount of movement
    // can be determined without allowing cheating
    cmd->serverTime = cl.serverTime;

    for (i=0 ; i<3 ; i++) {
        cmd->angles[i] = ANGLE2SHORT(cl.viewangles[i]);
    }
}


/*
=================
CL_CreateCmd
=================
*/
usercmd_t CL_CreateCmd( void ) {
    usercmd_t   cmd;
    vec3_t      oldAngles;

    VectorCopy( cl.viewangles, oldAngles );

    // keyboard angle adjustment
    CL_AdjustAngles ();
    
    Com_Memset( &cmd, 0, sizeof( cmd ) );

    CL_CmdButtons( &cmd );

    // get basic movement from keyboard
    CL_KeyMove( &cmd );

    // get basic movement from mouse
    CL_MouseMove( &cmd );

    // get basic movement from joystick
    CL_JoystickMove( &cmd );

    // check to make sure the angles haven't wrapped
    if ( cl.viewangles[PITCH] - oldAngles[PITCH] > 90 ) {
        cl.viewangles[PITCH] = oldAngles[PITCH] + 90;
    } else if ( oldAngles[PITCH] - cl.viewangles[PITCH] > 90 ) {
        cl.viewangles[PITCH] = oldAngles[PITCH] - 90;
    } 

    // store out the final values
    CL_FinishMove( &cmd );

    // draw debug graphs of turning for mouse testing
    if ( cl_debugMove->integer ) {
        if ( cl_debugMove->integer == 1 ) {
            SCR_DebugGraph( abs(cl.viewangles[YAW] - oldAngles[YAW]), 0 );
        }
        if ( cl_debugMove->integer == 2 ) {
            SCR_DebugGraph( abs(cl.viewangles[PITCH] - oldAngles[PITCH]), 0 );
        }
    }

    return cmd;
}


/*
=================
CL_CreateNewCommands

Create a new usercmd_t structure for this frame
=================
*/
void CL_CreateNewCommands( void ) {
    usercmd_t   *cmd;
    int         cmdNum;

    // no need to create usercmds until we have a gamestate
    if ( cls.state < CA_PRIMED ) {
        return;
    }

    frame_msec = com_frameTime - old_com_frameTime;

    // if running less than 5fps, truncate the extra time to prevent
    // unexpected moves after a hitch
    if ( frame_msec > 200 ) {
        frame_msec = 200;
    }
    old_com_frameTime = com_frameTime;


    // generate a command for this frame
    cl.cmdNumber++;
    cmdNum = cl.cmdNumber & CMD_MASK;
    cl.cmds[cmdNum] = CL_CreateCmd ();
    cmd = &cl.cmds[cmdNum];
}

/*
=================
CL_ReadyToSendPacket

Returns qfalse if we are over the maxpackets limit
and should choke back the bandwidth a bit by not sending
a packet this frame.  All the commands will still get
delivered in the next packet, but saving a header and
getting more delta compression will reduce total bandwidth.
=================
*/
qboolean CL_ReadyToSendPacket( void ) {
    int     oldPacketNum;
    int     delta;

    // don't send anything if playing back a demo
    if ( clc.demoplaying || cls.state == CA_CINEMATIC ) {
        return qfalse;
    }

    // If we are downloading, we send no less than 50ms between packets
    if ( *clc.downloadTempName &&
        cls.realtime - clc.lastPacketSentTime < 50 ) {
        return qfalse;
    }

    // if we don't have a valid gamestate yet, only send
    // one packet a second
    if ( cls.state != CA_ACTIVE && 
        cls.state != CA_PRIMED && 
        !*clc.downloadTempName &&
        cls.realtime - clc.lastPacketSentTime < 1000 ) {
        return qfalse;
    }

    // send every frame for loopbacks
    if ( clc.netchan.remoteAddress.type == NA_LOOPBACK ) {
        return qtrue;
    }

    // send every frame for LAN
    if ( Sys_IsLANAddress( clc.netchan.remoteAddress ) ) {
        return qtrue;
    }

    // check for exceeding cl_maxpackets
    if ( cl_maxpackets->integer < 15 ) {
        Cvar_Set( "cl_maxpackets", "15" );
    } else if ( cl_maxpackets->integer > 125 ) {
        Cvar_Set( "cl_maxpackets", "125" );
    }
    oldPacketNum = (clc.netchan.outgoingSequence - 1) & PACKET_MASK;
    delta = cls.realtime -  cl.outPackets[ oldPacketNum ].p_realtime;
    if ( delta < 1000 / cl_maxpackets->integer ) {
        // the accumulated commands will go out in the next packet
        return qfalse;
    }

    return qtrue;
}

/*
===================
CL_WritePacket

Create and send the command packet to the server
Including both the reliable commands and the usercmds

During normal gameplay, a client packet will contain something like:

4   sequence number
2   qport
4   serverid
4   acknowledged sequence number
4   clc.serverCommandSequence
<optional reliable commands>
1   clc_move or clc_moveNoDelta
1   command count
<count * usercmds>

===================
*/
void CL_WritePacket( void ) {
    msg_t       buf;
    byte        data[MAX_MSGLEN];
    int         i, j;
    usercmd_t   *cmd, *oldcmd;
    usercmd_t   nullcmd;
    int         packetNum;
    int         oldPacketNum;
    int         count, key;

    // don't send anything if playing back a demo
    if ( clc.demoplaying || cls.state == CA_CINEMATIC ) {
        return;
    }

    Com_Memset( &nullcmd, 0, sizeof(nullcmd) );
    oldcmd = &nullcmd;

    MSG_Init( &buf, data, sizeof(data) );

    MSG_Bitstream( &buf );
    // write the current serverId so the server
    // can tell if this is from the current gameState
    MSG_WriteLong( &buf, cl.serverId );

    // write the last message we received, which can
    // be used for delta compression, and is also used
    // to tell if we dropped a gamestate
    MSG_WriteLong( &buf, clc.serverMessageSequence );

    // write the last reliable message we received
    MSG_WriteLong( &buf, clc.serverCommandSequence );

    // write any unacknowledged clientCommands
    for ( i = clc.reliableAcknowledge + 1 ; i <= clc.reliableSequence ; i++ ) {
        MSG_WriteByte( &buf, clc_clientCommand );
        MSG_WriteLong( &buf, i );
        MSG_WriteString( &buf, clc.reliableCommands[ i & (MAX_RELIABLE_COMMANDS-1) ] );
    }

    // we want to send all the usercmds that were generated in the last
    // few packet, so even if a couple packets are dropped in a row,
    // all the cmds will make it to the server
    if ( cl_packetdup->integer < 0 ) {
        Cvar_Set( "cl_packetdup", "0" );
    } else if ( cl_packetdup->integer > 5 ) {
        Cvar_Set( "cl_packetdup", "5" );
    }
    oldPacketNum = (clc.netchan.outgoingSequence - 1 - cl_packetdup->integer) & PACKET_MASK;
    count = cl.cmdNumber - cl.outPackets[ oldPacketNum ].p_cmdNumber;
    if ( count > MAX_PACKET_USERCMDS ) {
        count = MAX_PACKET_USERCMDS;
        Com_Printf("MAX_PACKET_USERCMDS\n");
    }
    if ( count >= 1 ) {
        if ( cl_showSend->integer ) {
            Com_Printf( "(%i)", count );
        }

        // begin a client move command
        if ( cl_nodelta->integer || !cl.snap.valid || clc.demowaiting
            || clc.serverMessageSequence != cl.snap.messageNum ) {
            MSG_WriteByte (&buf, clc_moveNoDelta);
        } else {
            MSG_WriteByte (&buf, clc_move);
        }

        // write the command count
        MSG_WriteByte( &buf, count );

        // use the checksum feed in the key
        key = clc.checksumFeed;
        // also use the message acknowledge
        key ^= clc.serverMessageSequence;
        // also use the last acknowledged server command in the key
        key ^= Com_HashKey(clc.serverCommands[ clc.serverCommandSequence & (MAX_RELIABLE_COMMANDS-1) ], 32);

        // write all the commands, including the predicted command
        for ( i = 0 ; i < count ; i++ ) {
            j = (cl.cmdNumber - count + i + 1) & CMD_MASK;
            cmd = &cl.cmds[j];
            MSG_WriteDeltaUsercmdKey (&buf, key, oldcmd, cmd);
            oldcmd = cmd;
        }
    }

    //
    // deliver the message
    //
    packetNum = clc.netchan.outgoingSequence & PACKET_MASK;
    cl.outPackets[ packetNum ].p_realtime = cls.realtime;
    cl.outPackets[ packetNum ].p_serverTime = oldcmd->serverTime;
    cl.outPackets[ packetNum ].p_cmdNumber = cl.cmdNumber;
    clc.lastPacketSentTime = cls.realtime;

    if ( cl_showSend->integer ) {
        Com_Printf( "%i ", buf.cursize );
    }

    CL_Netchan_Transmit (&clc.netchan, &buf);   

    // clients never really should have messages large enough
    // to fragment, but in case they do, fire them all off
    // at once
    // TTimo: this causes a packet burst, which is bad karma for winsock
    // added a WARNING message, we'll see if there are legit situations where this happens
    while ( clc.netchan.unsentFragments ) {
        Com_DPrintf( "WARNING: #462 unsent fragments (not supposed to happen!)\n" );
        CL_Netchan_TransmitNextFragment( &clc.netchan );
    }
}

/*
=================
CL_SendCmd

Called every frame to builds and sends a command packet to the server.
=================
*/
void CL_SendCmd( void ) {
    // don't send any message if not connected
    if ( cls.state < CA_CONNECTED ) {
        return;
    }

    // don't send commands if paused
    if ( com_sv_running->integer && sv_paused->integer && cl_paused->integer ) {
        return;
    }

    // we create commands even if a demo is playing,
    CL_CreateNewCommands();

    // don't send a packet if the last packet was sent too recently
    if ( !CL_ReadyToSendPacket() ) {
        if ( cl_showSend->integer ) {
            Com_Printf( ". " );
        }
        return;
    }

    CL_WritePacket();
}

/*
============
CL_InitInput
============
*/
void CL_InitInput( void ) {
    Cmd_AddCommand ("centerview",IN_CenterView);

    Cmd_AddCommand ("+moveup",IN_UpDown);
    Cmd_AddCommand ("-moveup",IN_UpUp);
    Cmd_AddCommand ("+movedown",IN_DownDown);
    Cmd_AddCommand ("-movedown",IN_DownUp);
    Cmd_AddCommand ("+left",IN_LeftDown);
    Cmd_AddCommand ("-left",IN_LeftUp);
    Cmd_AddCommand ("+right",IN_RightDown);
    Cmd_AddCommand ("-right",IN_RightUp);
    Cmd_AddCommand ("+forward",IN_ForwardDown);
    Cmd_AddCommand ("-forward",IN_ForwardUp);
    Cmd_AddCommand ("+back",IN_BackDown);
    Cmd_AddCommand ("-back",IN_BackUp);
    Cmd_AddCommand ("+lookup", IN_LookupDown);
    Cmd_AddCommand ("-lookup", IN_LookupUp);
    Cmd_AddCommand ("+lookdown", IN_LookdownDown);
    Cmd_AddCommand ("-lookdown", IN_LookdownUp);
    Cmd_AddCommand ("+strafe", IN_StrafeDown);
    Cmd_AddCommand ("-strafe", IN_StrafeUp);
    Cmd_AddCommand ("+moveleft", IN_MoveleftDown);
    Cmd_AddCommand ("-moveleft", IN_MoveleftUp);
    Cmd_AddCommand ("+moveright", IN_MoverightDown);
    Cmd_AddCommand ("-moveright", IN_MoverightUp);
    Cmd_AddCommand ("+speed", IN_SpeedDown);
    Cmd_AddCommand ("-speed", IN_SpeedUp);
    Cmd_AddCommand ("+attack", IN_Button0Down);
    Cmd_AddCommand ("-attack", IN_Button0Up);
    Cmd_AddCommand ("+button0", IN_Button0Down);
    Cmd_AddCommand ("-button0", IN_Button0Up);
    Cmd_AddCommand ("+button1", IN_Button1Down);
    Cmd_AddCommand ("-button1", IN_Button1Up);
    Cmd_AddCommand ("+button2", IN_Button2Down);
    Cmd_AddCommand ("-button2", IN_Button2Up);
    Cmd_AddCommand ("+button3", IN_Button3Down);
    Cmd_AddCommand ("-button3", IN_Button3Up);
    Cmd_AddCommand ("+button4", IN_Button4Down);
    Cmd_AddCommand ("-button4", IN_Button4Up);
    Cmd_AddCommand ("+button5", IN_Button5Down);
    Cmd_AddCommand ("-button5", IN_Button5Up);
    Cmd_AddCommand ("+button6", IN_Button6Down);
    Cmd_AddCommand ("-button6", IN_Button6Up);
    Cmd_AddCommand ("+button7", IN_Button7Down);
    Cmd_AddCommand ("-button7", IN_Button7Up);
    Cmd_AddCommand ("+button8", IN_Button8Down);
    Cmd_AddCommand ("-button8", IN_Button8Up);
    Cmd_AddCommand ("+button9", IN_Button9Down);
    Cmd_AddCommand ("-button9", IN_Button9Up);
    Cmd_AddCommand ("+button10", IN_Button10Down);
    Cmd_AddCommand ("-button10", IN_Button10Up);
    Cmd_AddCommand ("+button11", IN_Button11Down);
    Cmd_AddCommand ("-button11", IN_Button11Up);
    Cmd_AddCommand ("+button12", IN_Button12Down);
    Cmd_AddCommand ("-button12", IN_Button12Up);
    Cmd_AddCommand ("+button13", IN_Button13Down);
    Cmd_AddCommand ("-button13", IN_Button13Up);
    Cmd_AddCommand ("+button14", IN_Button14Down);
    Cmd_AddCommand ("-button14", IN_Button14Up);
    Cmd_AddCommand ("+mlook", IN_MLookDown);
    Cmd_AddCommand ("-mlook", IN_MLookUp);

    cl_nodelta = Cvar_Get ("cl_nodelta", "0", 0);
    cl_debugMove = Cvar_Get ("cl_debugMove", "0", 0);
}

---