Magazyn Amiga 14/MA_Cover_14.iso/source/c/q1source_amy/qw/client/cl_input.c

C/C++ Source or Header | 1999-12-21 | 13.2 KB | 534 lines

/*
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"

cvar_t    cl_nodelta = {"cl_nodelta","0"};

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

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
0 if held then released, and
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)
{
    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_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;
    }
}

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

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

//
// allways dump the first two message, because it may contain leftover inputs
// from the last level
//
    if (++cl.movemessages <= 2)
        return;
//
// 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;

    // send milliseconds of time to apply the move
    ms = host_frametime * 1000;
    if (ms > 250)
        ms = 100;        // time was unreasonable
    cmd->msec = ms;

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

    cmd->impulse = in_impulse;
    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] = ((int)(cmd->angles[i]*65536.0/360)&65535) * (360.0/65536.0);
}

/*
=================
CL_SendCmd
=================
*/
void CL_SendCmd (void)
{
    sizebuf_t    buf;
    byte        data[128];
    int            i;
    usercmd_t    *cmd, *oldcmd;
    int            checksumIndex;
    int            lost;
    int            seq_hash;

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

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

//    seq_hash = (cls.netchan.outgoing_sequence & 0xffff) ; // ^ QW_CHECK_HASH;
    seq_hash = cls.netchan.outgoing_sequence;

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

    // allow mice or other external controllers to add to the move
    IN_Move (cmd);

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

    CL_FinishMove(cmd);

    Cam_FinishMove(cmd);

// send this and the previous cmds in the message, so
// if the last packet was dropped, it can be recovered
    buf.maxsize = 128;
    buf.cursize = 0;
    buf.data = data;

    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);

    i = (cls.netchan.outgoing_sequence-2) & UPDATE_MASK;
    cmd = &cl.frames[i].cmd;
    MSG_WriteDeltaUsercmd (&buf, &nullcmd, cmd);
    oldcmd = cmd;

    i = (cls.netchan.outgoing_sequence-1) & UPDATE_MASK;
    cmd = &cl.frames[i].cmd;
    MSG_WriteDeltaUsercmd (&buf, oldcmd, cmd);
    oldcmd = cmd;

    i = (cls.netchan.outgoing_sequence) & UPDATE_MASK;
    cmd = &cl.frames[i].cmd;
    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,
        seq_hash);

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

    if (cl.validsequence && !cl_nodelta.value && cls.state == ca_active &&
        !cls.demorecording)
    {
        cl.frames[cls.netchan.outgoing_sequence&UPDATE_MASK].delta_sequence = cl.validsequence;
        MSG_WriteByte (&buf, clc_delta);
        MSG_WriteByte (&buf, cl.validsequence&255);
    }
    else
        cl.frames[cls.netchan.outgoing_sequence&UPDATE_MASK].delta_sequence = -1;

    if (cls.demorecording)
        CL_WriteDemoCmd(cmd);

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



/*
============
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);

    Cvar_RegisterVariable (&cl_nodelta);
}

/*
============
CL_ClearStates
============
*/
void CL_ClearStates (void)
{
}