cl_input.c

/*
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.

*/
// cl.input.c  -- builds an intended movement command to send to the server

#include "quakedef.h"
#include "movie.h"
#ifdef GLQUAKE
#include "gl_model.h"
#include "gl_local.h"
#else
#include "r_model.h"
#include "r_local.h"
#endif
#include "teamplay.h"
#include "input.h"
#include "pmove.h"		// PM_FLY etc


cvar_t	cl_nodelta = {"cl_nodelta","0"};
cvar_t	cl_c2spps = {"cl_c2spps","0"};
cvar_t	cl_c2sImpulseBackup = {"cl_c2sImpulseBackup","3"};
cvar_t  cl_weaponhide = {"cl_weaponhide", "0"};
cvar_t  cl_weaponpreselect = {"cl_weaponpreselect", "0"};

cvar_t	cl_smartjump = {"cl_smartjump", "1"};

extern cvar_t cl_independentPhysics;
extern qbool physframe;
extern double physframetime;

#ifdef JSS_CAM
cvar_t cam_zoomspeed = {"cam_zoomspeed", "300"};
cvar_t cam_zoomaccel = {"cam_zoomaccel", "2000"};
#endif

#define CL_INPUT_WEAPONHIDE() ((cl_weaponhide.integer == 1) \
	|| ((cl_weaponhide.integer == 2) && (cl.deathmatch == 1)))

/*
===============================================================================
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 a parameter to the command so it can be matched up with
the release.

state bit 0 is the current state of the key
state bit 1 is edge triggered on the up to down transition
state bit 2 is edge triggered on the down to up transition
===============================================================================
*/

kbutton_t	in_mlook, in_klook;
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, in_use, in_jump, in_attack, in_attack2;
kbutton_t	in_up, in_down;

int			in_impulse;
#define MAXWEAPONS 10
int weapon_order[MAXWEAPONS] = {2, 1};

int IN_BestWeapon (void);

void 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->state & 1)
		return;		// still down
	b->state |= 1 + 2;	// down + impulse down
}

void KeyUp (kbutton_t *b) {
	int k;
	char *c;
	
	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->state &= ~1;		// now up
		b->state |= 4; 		// impulse up
		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

	if (!(b->state & 1))
		return;		// still up (this should not happen)
	b->state &= ~1;		// now up
	b->state |= 4; 		// impulse up
}

void IN_KLookDown (void) {KeyDown(&in_klook);}
void IN_KLookUp (void) {KeyUp(&in_klook);}

void IN_MLookDown (void) {KeyDown(&in_mlook);}
void IN_MLookUp (void) {
	if (concussioned) return;
	KeyUp(&in_mlook);
	if (!mlook_active && lookspring.value)
		V_StartPitchDrift();
}

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

void IN_SpeedDown(void) {KeyDown(&in_speed);}
void IN_SpeedUp(void) {KeyUp(&in_speed);}
void IN_StrafeDown(void) {KeyDown(&in_strafe);}
void IN_StrafeUp(void) {KeyUp(&in_strafe);}

void IN_AttackDown(void) {
	int best;
	if (cl_weaponpreselect.value && (best = IN_BestWeapon()))
			in_impulse = best;
	
	KeyDown(&in_attack);
}

void IN_AttackUp(void) {
	if (CL_INPUT_WEAPONHIDE()) {
		// performs "weapon 2 1"
		// that means: if player has shotgun and shells, select shotgun, otherwise select axe
		in_impulse = (cl.stats[STAT_ITEMS] & IT_SHOTGUN && cl.stats[STAT_SHELLS] >= 1) ? 2 : 1; 
	}
	KeyUp(&in_attack);
}

void IN_UseDown (void) {KeyDown(&in_use);}
void IN_UseUp (void) {KeyUp(&in_use);}
void IN_Attack2Down (void) { KeyDown(&in_attack2);}
void IN_Attack2Up (void) { KeyUp(&in_attack2);}


void IN_JumpDown(void) {
	qbool up;
	int pmt;

	if (cls.state != ca_active || !cl_smartjump.value || cls.demoplayback)
		up = false;
	else if (cl.spectator)
		up = (Cam_TrackNum() == -1);
	else if (cl.stats[STAT_HEALTH] <= 0)
		up = false;
	else if (cl.validsequence && (
	((pmt = cl.frames[cl.validsequence & UPDATE_MASK].playerstate[cl.playernum].pm_type) == PM_FLY)
	|| pmt == PM_SPECTATOR || pmt == PM_OLD_SPECTATOR))
		up = true;
	else if (cl.waterlevel >= 2 && !(cl.teamfortress && (in_forward.state & 1)))
		up = true;
	else
		up = false;

	KeyDown(up ? &in_up : &in_jump);
}
void IN_JumpUp(void) {
	if (cl_smartjump.value)
		KeyUp(&in_up);
	KeyUp(&in_jump);
}

// called within 'impulse' or 'weapon' commands, remembers it's first 10 (MAXWEAPONS) arguments
void IN_RememberWpOrder (void) {
	int i, c;
	c = Cmd_Argc() - 1;

	for (i = 0; i < MAXWEAPONS; i++) 
		weapon_order[i] = (i < c) ? Q_atoi(Cmd_Argv(i+1)) : 0;
}

// picks the best available (carried & having some ammunition) weapon according to users current preference
int IN_BestWeapon (void) {
	int i, imp, items;
	// we select at least 'some' weapon to get 'no ammo.' or 'no weapon.' message again
	int best = weapon_order[0];

	items = cl.stats[STAT_ITEMS];

	for (i = MAXWEAPONS - 1; i >= 0; i--) {
		imp = weapon_order[i];
		if (imp < 1 || imp > 8)
			continue;

		switch (imp) {
			case 1:
				if (items & IT_AXE)
					best = 1;
				break;
			case 2:
				if (items & IT_SHOTGUN && cl.stats[STAT_SHELLS] >= 1)
					best = 2;
				break;
			case 3:
				if (items & IT_SUPER_SHOTGUN && cl.stats[STAT_SHELLS] >= 2)
					best = 3;
				break;
			case 4:
				if (items & IT_NAILGUN && cl.stats[STAT_NAILS] >= 1)
					best = 4;
				break;
			case 5:
				if (items & IT_SUPER_NAILGUN && cl.stats[STAT_NAILS] >= 2)
					best = 5;
				break;
			case 6:
				if (items & IT_GRENADE_LAUNCHER && cl.stats[STAT_ROCKETS] >= 1)
					best = 6;
				break;
			case 7:
				if (items & IT_ROCKET_LAUNCHER && cl.stats[STAT_ROCKETS] >= 1)
					best = 7;
				break;
			case 8:
				if (items & IT_LIGHTNING && cl.stats[STAT_CELLS] >= 1)
					best = 8;
		}
	}

	return best;
}

void IN_Impulse (void) {
	int best;

	in_impulse = Q_atoi(Cmd_Argv(1));

	if (Cmd_Argc() <= 2)
		return;

	// if more than one argument, select immediately the best weapon
	IN_RememberWpOrder();
	if ((best = IN_BestWeapon()))
		in_impulse = best;
}

// this is the same command as impulse but cl_weaponpreselect can be used in here, while for impulses cannot be used
void IN_Weapon(void) {
	int c, best, mode;
	if ((c = Cmd_Argc() - 1) < 1) {
		Com_Printf("Usage: %s w1 [w2 [w3..]]\nWill pre-select best available weapon from given sequence.\n", Cmd_Argv(0));
		return;
	}

	// read user input
	IN_RememberWpOrder();

	best = IN_BestWeapon();

	mode = (int) cl_weaponpreselect.value;

	// cl_weaponpreselect behaviour:
	// 0: select best weapon right now
	// 1: always only pre-select; switch to it on +attack
	// 2: user is holding +attack -> select, otherwise just pre-select
	// 3: same like 1, but only in deathmatch 1
	// 4: same like 2, but only in deathmatch 1
	if (mode == 3) {
		mode = (cl.deathmatch == 1) ? 1 : 0;
	}
	else if (mode == 4) {
		mode = (cl.deathmatch == 1) ? 2 : 0;
	}

	switch (mode) {
		case 2:
			if ((in_attack.state & 3) && best) // user is holding +attack and there is some weapon available
				in_impulse = best;
			break;
		case 1: break;	// don't select weapon immediately
		default: case 0:	// no pre-selection
			if (best)
				in_impulse = best;
			
			break;
	}
}

/*
Returns 0.25 if a key was pressed and released during the frame,
0.5 if it was pressed and held
0 if held then released, and
1.0 if held for the entire time
*/
float CL_KeyState (kbutton_t *key, qbool lookbutton) {
	float val;
	qbool impulsedown, impulseup, down;
	
	impulsedown = key->state & 2;
	impulseup = key->state & 4;
	down = key->state & 1;
	val = 0.0;
	
	if (impulsedown && !impulseup) {
		if (down)
			val = lookbutton ? 0.5 : 1.0;	// pressed and held this frame
		else
			val = 0;	// I_Error ();
	}
	if (impulseup && !impulsedown) {
		if (down)
			val = 0.0;	// I_Error ();
		else
			val = 0.0;	// released this frame
	}
	if (!impulsedown && !impulseup)	{
		if (down)
			val = 1.0;	// held the entire frame
		else
			val = 0.0;	// up the entire frame
	}
	if (impulsedown && impulseup) {
		if (down)
			val = 0.75;	// released and re-pressed this frame
		else
			val = 0.25;	// pressed and released this frame
	}

	key->state &= 1;		// clear impulses
	
	return val;
}

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

cvar_t	cl_upspeed = {"cl_upspeed","200", CVAR_ARCHIVE};
cvar_t	cl_forwardspeed = {"cl_forwardspeed","400", CVAR_ARCHIVE};
cvar_t	cl_backspeed = {"cl_backspeed","400", CVAR_ARCHIVE};
cvar_t	cl_sidespeed = {"cl_sidespeed","400", CVAR_ARCHIVE};

cvar_t	cl_movespeedkey = {"cl_movespeedkey","2.0", CVAR_ARCHIVE};
cvar_t	cl_anglespeedkey = {"cl_anglespeedkey","1.5", CVAR_ARCHIVE};

cvar_t	cl_yawspeed = {"cl_yawspeed","140", CVAR_ARCHIVE};
cvar_t	cl_pitchspeed = {"cl_pitchspeed","150", CVAR_ARCHIVE};

cvar_t	lookspring = {"lookspring","0",CVAR_ARCHIVE};
cvar_t	lookstrafe = {"lookstrafe","0",CVAR_ARCHIVE};
cvar_t	sensitivity = {"sensitivity","12",CVAR_ARCHIVE};
cvar_t	cursor_sensitivity = {"scr_cursor_sensitivity", "1", CVAR_ARCHIVE};
cvar_t	freelook = {"freelook","1",CVAR_ARCHIVE};

cvar_t	m_pitch = {"m_pitch","0.022", CVAR_ARCHIVE};
cvar_t	m_yaw = {"m_yaw","0.022", CVAR_ARCHIVE};
cvar_t	m_forward = {"m_forward","1"};
cvar_t	m_side = {"m_side","0.8"};
cvar_t	m_accel = {"m_accel", "0", CVAR_ARCHIVE};


void CL_Rotate_f (void) {
	if (Cmd_Argc() != 2) {
		Com_Printf("Usage: %s <degrees>\n", Cmd_Argv(0));
		return;
	}
	if ((cl.fpd & FPD_LIMIT_YAW) || allow_scripts.value < 2)
		return;
	cl.viewangles[YAW] += atof(Cmd_Argv(1));
	cl.viewangles[YAW] = anglemod(cl.viewangles[YAW]);
}

//Moves the local angle positions
void CL_AdjustAngles (void) {
	float basespeed, speed, up, down, frametime;

	if (Movie_IsCapturing() && movie_steadycam.value)
		frametime = movie_fps.value > 0 ? 1.0 / movie_fps.value : 1 / 30.0;
	else
		frametime = cls.trueframetime;

	basespeed = ((in_speed.state & 1) ? cl_anglespeedkey.value : 1);

	
	if (!(in_strafe.state & 1)) {
		speed = basespeed * cl_yawspeed.value;
		if ((cl.fpd & FPD_LIMIT_YAW) || allow_scripts.value < 2)
			speed = bound(-900, speed, 900);
		speed *= frametime;
		cl.viewangles[YAW] -= speed * CL_KeyState(&in_right, true);
		cl.viewangles[YAW] += speed * CL_KeyState(&in_left, true);
		cl.viewangles[YAW] = anglemod(cl.viewangles[YAW]);
	}

	
	speed = basespeed * cl_pitchspeed.value;
	if ((cl.fpd & FPD_LIMIT_PITCH) || allow_scripts.value == 0)
		speed = bound(-700, speed, 700);
	speed *= frametime;
	if (in_klook.state & 1)	{
		V_StopPitchDrift ();
		cl.viewangles[PITCH] -= speed * CL_KeyState(&in_forward, true);
		cl.viewangles[PITCH] += speed * CL_KeyState(&in_back, true);
	}

	
	up = CL_KeyState(&in_lookup, true);
	down = CL_KeyState(&in_lookdown, true);
	cl.viewangles[PITCH] -= speed * up;
	cl.viewangles[PITCH] += speed * down;
	if (up || down)
		V_StopPitchDrift();

	if (cl.viewangles[PITCH] > cl.maxpitch)
		cl.viewangles[PITCH] = cl.maxpitch;
	if (cl.viewangles[PITCH] < cl.minpitch)
		cl.viewangles[PITCH] = cl.minpitch;

	//cl.viewangles[PITCH] = bound(cl.min!pitch, cl.viewangles[PITCH], cl.ma!xpitch);
	cl.viewangles[ROLL] = bound(-50, cl.viewangles[ROLL], 50);		
} 

//Send the intended movement message to the server
void CL_BaseMove (usercmd_t *cmd) {	
	CL_AdjustAngles ();
	
	memset (cmd, 0, sizeof(*cmd));
	
	VectorCopy (cl.viewangles, cmd->angles);
	if (in_strafe.state & 1) {
		cmd->sidemove += cl_sidespeed.value * CL_KeyState (&in_right, false);
		cmd->sidemove -= cl_sidespeed.value * CL_KeyState (&in_left, false);
	}

	cmd->sidemove += cl_sidespeed.value * CL_KeyState (&in_moveright, false);
	cmd->sidemove -= cl_sidespeed.value * CL_KeyState (&in_moveleft, false);

	cmd->upmove += cl_upspeed.value * CL_KeyState (&in_up, false);
	cmd->upmove -= cl_upspeed.value * CL_KeyState (&in_down, false);

	if (!(in_klook.state & 1)) {	
		cmd->forwardmove += cl_forwardspeed.value * CL_KeyState (&in_forward, false);
		cmd->forwardmove -= cl_backspeed.value * CL_KeyState (&in_back, false);
	}	

	// adjust for speed key
	if (in_speed.state & 1)	{
		cmd->forwardmove *= cl_movespeedkey.value;
		cmd->sidemove *= cl_movespeedkey.value;
		cmd->upmove *= cl_movespeedkey.value;
	}	
	
#ifdef JSS_CAM
{
	static float zoomspeed = 0;

	if ((cls.demoplayback || cl.spectator) && Cvar_Value("cam_thirdperson") && !Cvar_Value("cam_lockpos"))
	{
		zoomspeed -= CL_KeyState(&in_forward, false) * cls.trueframetime * cam_zoomaccel.value;
		zoomspeed += CL_KeyState(&in_back, false) * cls.trueframetime * cam_zoomaccel.value;
		if (!CL_KeyState(&in_forward, false) && !CL_KeyState(&in_back, false)) {
			if (zoomspeed > 0) {
				zoomspeed -= cls.trueframetime * cam_zoomaccel.value;
				if (zoomspeed < 0)
					zoomspeed = 0;
			}
			else if (zoomspeed < 0) {
				zoomspeed += cls.trueframetime * cam_zoomaccel.value;
				if (zoomspeed > 0)
					zoomspeed = 0;
			}
		}
		zoomspeed = bound (-cam_zoomspeed.value, zoomspeed, cam_zoomspeed.value);

		if (zoomspeed) {
			float dist = Cvar_Value("cam_dist");

			dist += cls.trueframetime * zoomspeed;
			if (dist < 0)
				dist = 0;
			Cvar_SetValue (Cvar_Find("cam_dist"),  dist);
		}
	}
}
#endif
}

int MakeChar (int i) {
	i &= ~3;
	if (i < -127 * 4)
		i = -127 * 4;
	if (i > 127 * 4)
		i = 127 * 4;
	return i;
}

void CL_FinishMove (usercmd_t *cmd) {
	int i, ms;
	float frametime;
	static double extramsec = 0;
	extern cvar_t allow_scripts; 

	if (Movie_IsCapturing() && movie_steadycam.value)
		frametime = movie_fps.value > 0 ? 1.0 / movie_fps.value : 1 / 30.0;
	else
		frametime = cls.trueframetime;

	// figure button bits
	if ( in_attack.state & 3 )
		cmd->buttons |= 1;
	in_attack.state &= ~2;

	if (in_jump.state & 3)
		cmd->buttons |= 2;
	in_jump.state &= ~2;

	if (in_use.state & 3)
		cmd->buttons |= 4;
	in_use.state &= ~2;

	if (in_attack2.state & 3)
		cmd->buttons |= 8;
	in_attack2.state &= ~2;

	// send milliseconds of time to apply the move
	//#fps	extramsec += cls.frametime * 1000;
	extramsec += (cl_independentPhysics.value == 0 ? frametime : physframetime) * 1000;	//#fps
	ms = extramsec;
	extramsec -= ms;
	if (ms > 250)
		ms = 100;		// time was unreasonable
	cmd->msec = ms;

	VectorCopy (cl.viewangles, cmd->angles);

	// shaman RFE 1030281 {
	// KTPro's KFJump == impulse 156
	// KTPro's KRJump == impulse 164
	if ( *Info_ValueForKey(cl.serverinfo, "kmod") && (
		((in_impulse == 156) && (cl.fpd & FPD_LIMIT_YAW || allow_scripts.value < 2)) ||
		((in_impulse == 164) && (cl.fpd & FPD_LIMIT_PITCH || allow_scripts.value == 0))
		)
	) {
			cmd->impulse = 0;
	} else {
		cmd->impulse = in_impulse;
	}
	// } shaman RFE 1030281
	in_impulse = 0;

	// chop down so no extra bits are kept that the server wouldn't get
	cmd->forwardmove = MakeChar (cmd->forwardmove);
	cmd->sidemove = MakeChar (cmd->sidemove);
	cmd->upmove = MakeChar (cmd->upmove);

	for (i = 0; i < 3; i++)
		cmd->angles[i] = (Q_rint(cmd->angles[i] * 65536.0 / 360.0) & 65535) * (360.0 / 65536.0);
}

void CL_SendClientCommand(qbool reliable, char *format, ...)
{
	va_list		argptr;
	char		string[2048];

	if (cls.demoplayback)
		return;	// no point.

	va_start (argptr, format);
	vsnprintf (string, sizeof(string), format, argptr);
	va_end (argptr);

	if (reliable)
	{
		MSG_WriteByte (&cls.netchan.message, clc_stringcmd);
		MSG_WriteString (&cls.netchan.message, string);
	}
	else
	{
		MSG_WriteByte (&cls.cmdmsg, clc_stringcmd);
		MSG_WriteString (&cls.cmdmsg, string);
	}
}

int cmdtime_msec = 0;

void CL_SendCmd (void) {
	sizebuf_t buf;
	byte data[128];
	usercmd_t *cmd, *oldcmd;
	int i, checksumIndex, lost;
	qbool dontdrop;
	static float pps_balance = 0;
	static int dropcount = 0;

	if (cls.demoplayback && !cls.mvdplayback)	
		return; // sendcmds come from the demo

#ifdef FTE_PEXT_CHUNKEDDOWNLOADS
	CL_SendChunkDownloadReq();
#endif

	// save this command off for prediction
	i = cls.netchan.outgoing_sequence & UPDATE_MASK;
	cmd = &cl.frames[i].cmd;
	cl.frames[i].senttime = cls.realtime;
	cl.frames[i].receivedtime = -1;		// we haven't gotten a reply yet

	// update network stats table
	i = cls.netchan.outgoing_sequence&NETWORK_STATS_MASK;
	network_stats[i].delta = 0;     // filled-in later
	network_stats[i].sentsize = 0;  // filled-in later
	network_stats[i].senttime = cls.realtime;
	network_stats[i].receivedtime = -1;

	// get basic movement from keyboard
	CL_BaseMove (cmd);

	// allow mice or other external controllers to add to the move

	if (cl_independentPhysics.value == 0 || (physframe && cl_independentPhysics.value != 0)) {
		IN_Move(cmd);
	}

	// if we are spectator, try autocam
	if (cl.spectator)
		Cam_Track(cmd);

	CL_FinishMove(cmd);
	cmdtime_msec += cmd->msec;

	Cam_FinishMove(cmd);

	if (cls.mvdplayback) {		
		CL_CalcPlayerFPS(&cl.players[cl.playernum], cmd->msec);
        cls.netchan.outgoing_sequence++;
		return;
	}

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

	SZ_Write (&buf, cls.cmdmsg.data, cls.cmdmsg.cursize);
	if (cls.cmdmsg.overflowed)
		Com_DPrintf("cls.cmdmsg overflowed\n");
	SZ_Clear (&cls.cmdmsg);

	// begin a client move command
	MSG_WriteByte (&buf, clc_move);

	// save the position for a checksum byte
	checksumIndex = buf.cursize;
	MSG_WriteByte (&buf, 0);

	// write our lossage percentage
	lost = CL_CalcNet();
	MSG_WriteByte (&buf, (byte)lost);

	// send this and the previous two cmds in the message, so if the last packet was dropped, it can be recovered
	dontdrop = false;

	i = (cls.netchan.outgoing_sequence - 2) & UPDATE_MASK;
	cmd = &cl.frames[i].cmd;
	if (cl_c2sImpulseBackup.value >= 2)
		dontdrop = dontdrop || cmd->impulse;
	MSG_WriteDeltaUsercmd (&buf, &nullcmd, cmd);
	oldcmd = cmd;

	i = (cls.netchan.outgoing_sequence - 1) & UPDATE_MASK;
	cmd = &cl.frames[i].cmd;
	if (cl_c2sImpulseBackup.value >= 3)
		dontdrop = dontdrop || cmd->impulse;
	MSG_WriteDeltaUsercmd (&buf, oldcmd, cmd);
	oldcmd = cmd;

	i = (cls.netchan.outgoing_sequence) & UPDATE_MASK;
	cmd = &cl.frames[i].cmd;
	if (cl_c2sImpulseBackup.value >= 1)
		dontdrop = dontdrop || cmd->impulse;
	MSG_WriteDeltaUsercmd (&buf, oldcmd, cmd);

	// calculate a checksum over the move commands
	buf.data[checksumIndex] = COM_BlockSequenceCRCByte(
		buf.data + checksumIndex + 1, buf.cursize - checksumIndex - 1,
		cls.netchan.outgoing_sequence);

	// request delta compression of entities
	if (cls.netchan.outgoing_sequence - cl.validsequence >= UPDATE_BACKUP - 1) {
		cl.validsequence = 0;
		cl.delta_sequence = 0;
	}

	if (cl.delta_sequence && !cl_nodelta.value && cls.state == ca_active) {
		cl.frames[cls.netchan.outgoing_sequence & UPDATE_MASK].delta_sequence = cl.delta_sequence;
		MSG_WriteByte (&buf, clc_delta);
		MSG_WriteByte (&buf, cl.delta_sequence & 255);

		// network stats table
		network_stats[cls.netchan.outgoing_sequence&NETWORK_STATS_MASK].delta = 1;
	} else {
		cl.frames[cls.netchan.outgoing_sequence & UPDATE_MASK].delta_sequence = -1;
	}

	if (cls.demorecording)
		CL_WriteDemoCmd (cmd);

	if (cl_c2spps.value) {
		pps_balance += cls.frametime;
		// never drop more than 2 messages in a row -- that'll cause PL
		// and don't drop if one of the last two movemessages have an impulse
		if (pps_balance > 0 || dropcount >= 2 || dontdrop) {
			float	pps;
			pps = cl_c2spps.value;
			if (pps < 10) pps = 10;
			if (pps > 72) pps = 72;
			pps_balance -= 1 / pps;
			// bound pps_balance. FIXME: is there a better way?
			if (pps_balance > 0.1) pps_balance = 0.1;
			if (pps_balance < -0.1) pps_balance = -0.1;
			dropcount = 0;
		} else {
			// don't count this message when calculating PL
			cl.frames[i].receivedtime = -3;
			// drop this message
			cls.netchan.outgoing_sequence++;
			dropcount++;
			return;
		}
	} else {
		pps_balance = 0;
		dropcount = 0;
	}

	cl.frames[cls.netchan.outgoing_sequence&UPDATE_MASK].sentsize = buf.cursize + 8;    // 8 = PACKET_HEADER
	// network stats table
	network_stats[cls.netchan.outgoing_sequence&NETWORK_STATS_MASK].sentsize = buf.cursize + 8;

	// deliver the message
	Netchan_Transmit (&cls.netchan, buf.cursize, buf.data);	
}

void CL_InitInput (void) {
	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_AttackDown);
	Cmd_AddCommand ("-attack", IN_AttackUp);
	Cmd_AddCommand ("+attack2", IN_Attack2Down);
	Cmd_AddCommand ("-attack2", IN_Attack2Up);
	Cmd_AddCommand ("+use", IN_UseDown);
	Cmd_AddCommand ("-use", IN_UseUp);
	Cmd_AddCommand ("+jump", IN_JumpDown);
	Cmd_AddCommand ("-jump", IN_JumpUp);
	Cmd_AddCommand ("impulse", IN_Impulse);
	Cmd_AddCommand ("weapon", IN_Weapon);
	Cmd_AddCommand ("+klook", IN_KLookDown);
	Cmd_AddCommand ("-klook", IN_KLookUp);
	Cmd_AddCommand ("+mlook", IN_MLookDown);
	Cmd_AddCommand ("-mlook", IN_MLookUp);

	
	Cmd_AddCommand ("rotate",CL_Rotate_f);

	Cvar_SetCurrentGroup(CVAR_GROUP_INPUT_KEYBOARD);

	Cvar_Register (&cl_smartjump);
	Cvar_Register (&cl_weaponhide);
	Cvar_Register (&cl_weaponpreselect);

	Cvar_Register (&cl_upspeed);
	Cvar_Register (&cl_forwardspeed);
	Cvar_Register (&cl_backspeed);
	Cvar_Register (&cl_sidespeed);
	Cvar_Register (&cl_movespeedkey);
	Cvar_Register (&cl_yawspeed);
	Cvar_Register (&cl_pitchspeed);
	Cvar_Register (&cl_anglespeedkey);

	Cvar_SetCurrentGroup(CVAR_GROUP_INPUT_MISC);
	Cvar_Register (&lookspring);
	Cvar_Register (&lookstrafe);
	Cvar_Register (&sensitivity);
	Cvar_Register (&cursor_sensitivity);	
	Cvar_Register (&freelook);

	Cvar_SetCurrentGroup(CVAR_GROUP_INPUT_MOUSE);
	Cvar_Register (&m_pitch);
	Cvar_Register (&m_yaw);
	Cvar_Register (&m_forward);
	Cvar_Register (&m_side);
	Cvar_Register (&m_accel);

	Cvar_SetCurrentGroup(CVAR_GROUP_NETWORK);
	Cvar_Register (&cl_nodelta);
	Cvar_Register (&cl_c2sImpulseBackup);
	Cvar_Register (&cl_c2spps);

	Cvar_ResetCurrentGroup();
	
#ifdef JSS_CAM
	Cvar_SetCurrentGroup(CVAR_GROUP_SPECTATOR);
	Cvar_Register (&cam_zoomspeed);
	Cvar_Register (&cam_zoomaccel);
	Cvar_ResetCurrentGroup();
#endif
}