st/code/client/cl_input.c

/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
Copyright (C) 2007 HermitWorks Entertainment Corporation

This file is part of the Space Trader source code.

The Space Trader 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.

The Space Trader 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 the Space Trader source code; 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 Q_EXTERNAL_CALL IN_MLookDown( void ) {
	in_mlooking = qtrue;
}

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

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

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

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

void Q_EXTERNAL_CALL 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 x, int y, bool absolute )
{
	if( absolute )
	{
		if ( cls.keyCatchers & KEYCATCH_UI )
		{
			int c = VM_Call( uivm, UI_MOUSE_EVENT, 0, x, y );
			Sys_SetCursor( c );
		}
		else if( cls.keyCatchers & KEYCATCH_CGAME )
		{
			VM_Call (cgvm, CG_MOUSE_EVENT, x, y);
		}
	}
	else if( !cls.keyCatchers )
	{
		cl.mouseDx[cl.mouseIndex] += x;
		cl.mouseDy[cl.mouseIndex] += y;
	}
}

/*
=================
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 don't have a valid gamestate yet, only send
	// one packet a second
	if ( cls.state != CA_ACTIVE && 
		cls.state != CA_PRIMED && 
		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, CL_GetReliableCommand( i ) );
	}

	// 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( CL_GetReliableServerCommand( clc.serverCommandSequence ), 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);
}