Quake-2

cl_input.c (12968B)

---

 /*
 Copyright (C) 1997-2001 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 "client.h"
 
 cvar_t	*cl_nodelta;
 
 extern	unsigned	sys_frame_time;
 unsigned	frame_msec;
 unsigned	old_sys_frame_time;
 
 /*
 ===============================================================================
 
 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
 
 
 Key_Event (int key, qboolean down, unsigned time);
 
   +mlook src time
 
 ===============================================================================
 */
 
 
 kbutton_t	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_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
 	{
 		Com_Printf ("Three keys down for a button!\n");
 		return;
 	}
 	
 	if (b->state & 1)
 		return;		// still down
 
 	// save timestamp
 	c = Cmd_Argv(2);
 	b->downtime = atoi(c);
 	if (!b->downtime)
 		b->downtime = sys_frame_time - 100;
 
 	b->state |= 1 + 2;	// down + impulse down
 }
 
 void 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->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)
 
 	// save timestamp
 	c = Cmd_Argv(2);
 	uptime = atoi(c);
 	if (uptime)
 		b->msec += uptime - b->downtime;
 	else
 		b->msec += 10;
 
 	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_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_Impulse (void) {in_impulse=atoi(Cmd_Argv(1));}
 
 /*
 ===============
 CL_KeyState
 
 Returns the fraction of the frame that the key was down
 ===============
 */
 float CL_KeyState (kbutton_t *key)
 {
 	float		val;
 	int			msec;
 
 	key->state &= 1;		// clear impulses
 
 	msec = key->msec;
 	key->msec = 0;
 
 	if (key->state)
 	{	// still down
 		msec += sys_frame_time - key->downtime;
 		key->downtime = sys_frame_time;
 	}
 
 #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;
 }
 
 
 
 
 //==========================================================================
 
 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;
 	float	up, down;
 	
 	if (in_speed.state & 1)
 		speed = cls.frametime * cl_anglespeedkey->value;
 	else
 		speed = cls.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);
 	}
 	if (in_klook.state & 1)
 	{
 		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;
 }
 
 /*
 ================
 CL_BaseMove
 
 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);
 		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_forwardspeed->value * CL_KeyState (&in_back);
 	}	
 
 //
 // adjust for speed key / running
 //
 	if ( (in_speed.state & 1) ^ (int)(cl_run->value) )
 	{
 		cmd->forwardmove *= 2;
 		cmd->sidemove *= 2;
 		cmd->upmove *= 2;
 	}	
 }
 
 void CL_ClampPitch (void)
 {
 	float	pitch;
 
 	pitch = SHORT2ANGLE(cl.frame.playerstate.pmove.delta_angles[PITCH]);
 	if (pitch > 180)
 		pitch -= 360;
 	if (cl.viewangles[PITCH] + pitch > 89)
 		cl.viewangles[PITCH] = 89 - pitch;
 	if (cl.viewangles[PITCH] + pitch < -89)
 		cl.viewangles[PITCH] = -89 - pitch;
 }
 
 /*
 ==============
 CL_FinishMove
 ==============
 */
 void CL_FinishMove (usercmd_t *cmd)
 {
 	int		ms;
 	int		i;
 
 //
 // figure button bits
 //	
 	if ( in_attack.state & 3 )
 		cmd->buttons |= BUTTON_ATTACK;
 	in_attack.state &= ~2;
 	
 	if (in_use.state & 3)
 		cmd->buttons |= BUTTON_USE;
 	in_use.state &= ~2;
 
 	if (anykeydown && cls.key_dest == key_game)
 		cmd->buttons |= BUTTON_ANY;
 
 	// send milliseconds of time to apply the move
 	ms = cls.frametime * 1000;
 	if (ms > 250)
 		ms = 100;		// time was unreasonable
 	cmd->msec = ms;
 
 	CL_ClampPitch ();
 	for (i=0 ; i<3 ; i++)
 		cmd->angles[i] = ANGLE2SHORT(cl.viewangles[i]);
 
 	cmd->impulse = in_impulse;
 	in_impulse = 0;
 
 // send the ambient light level at the player's current position
 	cmd->lightlevel = (byte)cl_lightlevel->value;
 }
 
 /*
 =================
 CL_CreateCmd
 =================
 */
 usercmd_t CL_CreateCmd (void)
 {
 	usercmd_t	cmd;
 
 	frame_msec = sys_frame_time - old_sys_frame_time;
 	if (frame_msec < 1)
 		frame_msec = 1;
 	if (frame_msec > 200)
 		frame_msec = 200;
 	
 	// get basic movement from keyboard
 	CL_BaseMove (&cmd);
 
 	// allow mice or other external controllers to add to the move
 	IN_Move (&cmd);
 
 	CL_FinishMove (&cmd);
 
 	old_sys_frame_time = sys_frame_time;
 
 //cmd.impulse = cls.framecount;
 
 	return cmd;
 }
 
 
 void IN_CenterView (void)
 {
 	cl.viewangles[PITCH] = -SHORT2ANGLE(cl.frame.playerstate.pmove.delta_angles[PITCH]);
 }
 
 /*
 ============
 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_AttackDown);
 	Cmd_AddCommand ("-attack", IN_AttackUp);
 	Cmd_AddCommand ("+use", IN_UseDown);
 	Cmd_AddCommand ("-use", IN_UseUp);
 	Cmd_AddCommand ("impulse", IN_Impulse);
 	Cmd_AddCommand ("+klook", IN_KLookDown);
 	Cmd_AddCommand ("-klook", IN_KLookUp);
 
 	cl_nodelta = Cvar_Get ("cl_nodelta", "0", 0);
 }
 
 
 
 /*
 =================
 CL_SendCmd
 =================
 */
 void CL_SendCmd (void)
 {
 	sizebuf_t	buf;
 	byte		data[128];
 	int			i;
 	usercmd_t	*cmd, *oldcmd;
 	usercmd_t	nullcmd;
 	int			checksumIndex;
 
 	// build a command even if not connected
 
 	// save this command off for prediction
 	i = cls.netchan.outgoing_sequence & (CMD_BACKUP-1);
 	cmd = &cl.cmds[i];
 	cl.cmd_time[i] = cls.realtime;	// for netgraph ping calculation
 
 	*cmd = CL_CreateCmd ();
 
 	cl.cmd = *cmd;
 
 	if (cls.state == ca_disconnected || cls.state == ca_connecting)
 		return;
 
 	if ( cls.state == ca_connected)
 	{
 		if (cls.netchan.message.cursize	|| curtime - cls.netchan.last_sent > 1000 )
 			Netchan_Transmit (&cls.netchan, 0, buf.data);	
 		return;
 	}
 
 	// send a userinfo update if needed
 	if (userinfo_modified)
 	{
 		CL_FixUpGender();
 		userinfo_modified = false;
 		MSG_WriteByte (&cls.netchan.message, clc_userinfo);
 		MSG_WriteString (&cls.netchan.message, Cvar_Userinfo() );
 	}
 
 	SZ_Init (&buf, data, sizeof(data));
 
 	if (cmd->buttons && cl.cinematictime > 0 && !cl.attractloop 
 		&& cls.realtime - cl.cinematictime > 1000)
 	{	// skip the rest of the cinematic
 		SCR_FinishCinematic ();
 	}
 
 	// begin a client move command
 	MSG_WriteByte (&buf, clc_move);
 
 	// save the position for a checksum byte
 	checksumIndex = buf.cursize;
 	MSG_WriteByte (&buf, 0);
 
 	// let the server know what the last frame we
 	// got was, so the next message can be delta compressed
 	if (cl_nodelta->value || !cl.frame.valid || cls.demowaiting)
 		MSG_WriteLong (&buf, -1);	// no compression
 	else
 		MSG_WriteLong (&buf, cl.frame.serverframe);
 
 	// send this and the previous cmds in the message, so
 	// if the last packet was dropped, it can be recovered
 	i = (cls.netchan.outgoing_sequence-2) & (CMD_BACKUP-1);
 	cmd = &cl.cmds[i];
 	memset (&nullcmd, 0, sizeof(nullcmd));
 	MSG_WriteDeltaUsercmd (&buf, &nullcmd, cmd);
 	oldcmd = cmd;
 
 	i = (cls.netchan.outgoing_sequence-1) & (CMD_BACKUP-1);
 	cmd = &cl.cmds[i];
 	MSG_WriteDeltaUsercmd (&buf, oldcmd, cmd);
 	oldcmd = cmd;
 
 	i = (cls.netchan.outgoing_sequence) & (CMD_BACKUP-1);
 	cmd = &cl.cmds[i];
 	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);
 
 	//
 	// deliver the message
 	//
 	Netchan_Transmit (&cls.netchan, buf.cursize, buf.data);	
 }