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/*

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

// Quake is a trademark of Id Software, Inc., (c) 1996 Id Software, Inc. All

// rights reserved.

#include "quakedef.h"

/*

===============================================================================

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;

kbutton_t	in_up, in_down;

int			in_impulse;

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

	{

		Con_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 = 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) {

KeyUp(&in_mlook);

if ( !(in_mlook.state&1) &&  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) {KeyDown(&in_attack);}

void IN_AttackUp(void) {KeyUp(&in_attack);}

void IN_UseDown (void) {KeyDown(&in_use);}

void IN_UseUp (void) {KeyUp(&in_use);}

void IN_JumpDown (void) {KeyDown(&in_jump);}

void IN_JumpUp (void) {KeyUp(&in_jump);}

void IN_Impulse (void) {in_impulse=Q_atoi(Cmd_Argv(1));}

/*

===============

CL_KeyState

Returns 0.25 if a key was pressed and released during the frame,

0.5 if it was pressed and held

1.0 if held for the entire time

===============

*/

float CL_KeyState (kbutton_t *key)

{

	float		val;

	qboolean	impulsedown, impulseup, down;

	impulsedown = key->state & 2;

	impulseup = key->state & 4;

	down = key->state & 1;

	val = 0;

	if (impulsedown && !impulseup)

		if (down)

			val = 0.5;	// pressed and held this frame

		else

			val = 0;	//	I_Error ();

	if (impulseup && !impulsedown)

		if (down)

			val = 0;	//	I_Error ();

		else

			val = 0;	// released this frame

	if (!impulsedown && !impulseup)

		if (down)

			val = 1.0;	// held the entire frame

		else

			val = 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_t	cl_forwardspeed = {"cl_forwardspeed","200", true};

cvar_t	cl_backspeed = {"cl_backspeed","200", true};

cvar_t	cl_sidespeed = {"cl_sidespeed","350"};

cvar_t	cl_movespeedkey = {"cl_movespeedkey","2.0"};

cvar_t	cl_yawspeed = {"cl_yawspeed","140"};

cvar_t	cl_pitchspeed = {"cl_pitchspeed","150"};

cvar_t	cl_anglespeedkey = {"cl_anglespeedkey","1.5"};

/*

================

CL_AdjustAngles

Moves the local angle positions

================

*/

void CL_AdjustAngles (void)

{

	float	speed;

	float	up, down;

	if (in_speed.state & 1)

		speed = host_frametime * cl_anglespeedkey.value;

	else

		speed = host_frametime;

	if (!(in_strafe.state & 1))

	{

		cl.viewangles[YAW] -= speed*cl_yawspeed.value*CL_KeyState (&in_right);

		cl.viewangles[YAW] += speed*cl_yawspeed.value*CL_KeyState (&in_left);

		cl.viewangles[YAW] = anglemod(cl.viewangles[YAW]);

	}

	if (in_klook.state & 1)

	{

		V_StopPitchDrift ();

		cl.viewangles[PITCH] -= speed*cl_pitchspeed.value * CL_KeyState (&in_forward);

		cl.viewangles[PITCH] += speed*cl_pitchspeed.value * CL_KeyState (&in_back);

	}

	up = CL_KeyState (&in_lookup);

	down = CL_KeyState(&in_lookdown);

	cl.viewangles[PITCH] -= speed*cl_pitchspeed.value * up;

	cl.viewangles[PITCH] += speed*cl_pitchspeed.value * down;

	if (up || down)

		V_StopPitchDrift ();

	if (cl.viewangles[PITCH] > 80)

		cl.viewangles[PITCH] = 80;

	if (cl.viewangles[PITCH] < -70)

		cl.viewangles[PITCH] = -70;

	if (cl.viewangles[ROLL] > 50)

		cl.viewangles[ROLL] = 50;

	if (cl.viewangles[ROLL] < -50)

		cl.viewangles[ROLL] = -50;

}

/*

================

CL_BaseMove

Send the intended movement message to the server

================

*/

void CL_BaseMove (usercmd_t *cmd)

{

	if (cls.signon != SIGNONS)

		return;

	CL_AdjustAngles ();

	Q_memset (cmd, 0, sizeof(*cmd));

	if (in_strafe.state & 1)

	{

		cmd->sidemove += cl_sidespeed.value * CL_KeyState (&in_right);

		cmd->sidemove -= cl_sidespeed.value * CL_KeyState (&in_left);

	}

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

	cmd->sidemove -= cl_sidespeed.value * CL_KeyState (&in_moveleft);

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

	cmd->upmove -= cl_upspeed.value * CL_KeyState (&in_down);

	if (! (in_klook.state & 1) )

	{

		cmd->forwardmove += cl_forwardspeed.value * CL_KeyState (&in_forward);

		cmd->forwardmove -= cl_backspeed.value * CL_KeyState (&in_back);

	}

//

// 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 QUAKE2

	cmd->lightlevel = cl.light_level;

#endif

}

/*

==============

CL_SendMove

==============

*/

void CL_SendMove (usercmd_t *cmd)

{

	int		i;

	int		bits;

	sizebuf_t	buf;

	byte	data[128];

	buf.maxsize = 128;

	buf.cursize = 0;

	buf.data = data;

	cl.cmd = *cmd;

//

// send the movement message

//

    MSG_WriteByte (&buf, clc_move);

	MSG_WriteFloat (&buf, cl.mtime[0]);	// so server can get ping times

	for (i=0 ; i<3 ; i++)

		MSG_WriteAngle (&buf, cl.viewangles[i]);

    MSG_WriteShort (&buf, cmd->forwardmove);

    MSG_WriteShort (&buf, cmd->sidemove);

    MSG_WriteShort (&buf, cmd->upmove);

//

// send button bits

//

	bits = 0;

	if ( in_attack.state & 3 )

		bits |= 1;

	in_attack.state &= ~2;

	if (in_jump.state & 3)

		bits |= 2;

	in_jump.state &= ~2;

    MSG_WriteByte (&buf, bits);

    MSG_WriteByte (&buf, in_impulse);

	in_impulse = 0;

#ifdef QUAKE2

//

// light level

//

	MSG_WriteByte (&buf, cmd->lightlevel);

#endif

//

// deliver the message

//

	if (cls.demoplayback)

		return;

//

// allways dump the first two message, because it may contain leftover inputs

// from the last level

//

	if (++cl.movemessages <= 2)

		return;

	if (NET_SendUnreliableMessage (cls.netcon, &buf) == -1)

	{

		Con_Printf ("CL_SendMove: lost server connection\n");

		CL_Disconnect ();

	}

}

/*

============

CL_InitInput

============

*/

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 ("+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 ("+klook", IN_KLookDown);

	Cmd_AddCommand ("-klook", IN_KLookUp);

	Cmd_AddCommand ("+mlook", IN_MLookDown);

	Cmd_AddCommand ("-mlook", IN_MLookUp);

}