Xash3D FWGS engine.
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/*
joyinput.c - joystick common input code
Copyright (C) 2016 a1batross
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 3 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.
*/
#ifndef XASH_DEDICATED
#include "common.h"
#include "input.h"
#include "keydefs.h"
#include "joyinput.h"
#include "client.h"
#include "gl_local.h"
#if defined(XASH_SDL)
#include "platform/sdl/events.h"
#endif
#ifndef SHRT_MAX
#define SHRT_MAX 0x7FFF
#endif
typedef enum engineAxis_e
{
JOY_AXIS_SIDE = 0,
JOY_AXIS_FWD,
JOY_AXIS_PITCH,
JOY_AXIS_YAW,
JOY_AXIS_RT,
JOY_AXIS_LT,
JOY_AXIS_NULL
} engineAxis_t;
#define MAX_AXES JOY_AXIS_NULL
#define JOY_SIMULATED_HAT_ID ( -1 )
// index - axis num come from event
// value - inner axis
static engineAxis_t joyaxesmap[MAX_AXES] =
{
JOY_AXIS_SIDE, // left stick, x
JOY_AXIS_FWD, // left stick, y
JOY_AXIS_PITCH, // right stick, y
JOY_AXIS_YAW, // right stick, x
JOY_AXIS_RT, // right trigger
JOY_AXIS_LT // left trigger
};
static struct joy_axis_s
{
short val;
short prevval;
} joyaxis[MAX_AXES] = { 0 };
static qboolean initialized = false, forcedisable = false;
static convar_t *joy_enable;
static byte currentbinding; // add posibility to remap keys, to place it in joykeys[]
float IN_TouchDrawText( float x1, float y1, float x2, float y2, const char *s, byte *color, float size );
float IN_TouchDrawCharacter( float x, float y, int number, float size );
convar_t *joy_pitch;
convar_t *joy_yaw;
convar_t *joy_forward;
convar_t *joy_side;
convar_t *joy_found;
convar_t *joy_index;
convar_t *joy_lt_threshold;
convar_t *joy_rt_threshold;
convar_t *joy_side_deadzone;
convar_t *joy_forward_deadzone;
convar_t *joy_side_key_threshold;
convar_t *joy_forward_key_threshold;
convar_t *joy_pitch_deadzone;
convar_t *joy_yaw_deadzone;
convar_t *joy_axis_binding;
/*
============
Joy_IsActive
============
*/
qboolean Joy_IsActive( void )
{
return !forcedisable && initialized;
}
/*
============
Joy_HatMotionEvent
DPad events
============
*/
void Joy_HatMotionEvent( int id, byte hat, byte value )
{
struct
{
int mask;
int key;
} keys[] =
{
{ JOY_HAT_UP, K_UPARROW },
{ JOY_HAT_DOWN, K_DOWNARROW },
{ JOY_HAT_LEFT, K_LEFTARROW },
{ JOY_HAT_RIGHT, K_RIGHTARROW },
};
int i;
if( !initialized )
return;
for( i = 0; i < ARRAYSIZE( keys ); i++ )
{
if( value & keys[i].mask )
{
if( !Key_IsDown( keys[i].key ))
Key_Event( keys[i].key, true );
}
else
{
if( Key_IsDown( keys[i].key ))
Key_Event( keys[i].key, false );
}
}
}
/*
=============
Joy_ProcessTrigger
=============
*/
void Joy_ProcessTrigger( const engineAxis_t engineAxis, short value )
{
int trigButton = 0, trigThreshold = 0;
switch( engineAxis )
{
case JOY_AXIS_RT:
trigButton = K_JOY2;
trigThreshold = joy_rt_threshold->integer;
break;
case JOY_AXIS_LT:
trigButton = K_JOY1;
trigThreshold = joy_lt_threshold->integer;
break;
default:
MsgDev( D_ERROR, "Joy_ProcessTrigger: invalid axis = %i", engineAxis );
break;
}
// update axis values
joyaxis[engineAxis].prevval = joyaxis[engineAxis].val;
joyaxis[engineAxis].val = value;
if( joyaxis[engineAxis].val > trigThreshold &&
joyaxis[engineAxis].prevval <= trigThreshold ) // ignore random press
{
Key_Event( trigButton, true );
}
else if( joyaxis[engineAxis].val < trigThreshold &&
joyaxis[engineAxis].prevval >= trigThreshold ) // we're unpressing (inverted)
{
Key_Event( trigButton, false );
}
}
int Joy_GetHatValueForAxis( const engineAxis_t engineAxis )
{
int threshold, negative, positive;
switch( engineAxis )
{
case JOY_AXIS_SIDE:
threshold = joy_side_key_threshold->integer;
negative = JOY_HAT_LEFT;
positive = JOY_HAT_RIGHT;
break;
case JOY_AXIS_FWD:
threshold = joy_side_key_threshold->integer;
negative = JOY_HAT_UP;
positive = JOY_HAT_DOWN;
break;
default:
ASSERT( false ); // only fwd/side axes can emit key events
return 0;
}
// similar code in Joy_ProcessTrigger
if( joyaxis[engineAxis].val > threshold &&
joyaxis[engineAxis].prevval <= threshold ) // ignore random press
{
return positive;
}
if( joyaxis[engineAxis].val < -threshold &&
joyaxis[engineAxis].prevval >= -threshold ) // we're unpressing (inverted)
{
return negative;
}
return 0;
}
/*
=============
Joy_ProcessStick
=============
*/
void Joy_ProcessStick( const engineAxis_t engineAxis, short value )
{
int deadzone = 0;
switch( engineAxis )
{
case JOY_AXIS_FWD: deadzone = joy_forward_deadzone->integer; break;
case JOY_AXIS_SIDE: deadzone = joy_side_deadzone->integer; break;
case JOY_AXIS_PITCH: deadzone = joy_pitch_deadzone->integer; break;
case JOY_AXIS_YAW: deadzone = joy_yaw_deadzone->integer; break;
default:
MsgDev( D_ERROR, "Joy_ProcessStick: invalid axis = %i", engineAxis );
break;
}
if( value < deadzone && value > -deadzone )
value = 0; // caught new event in deadzone, fill it with zero(no motion)
// update axis values
joyaxis[engineAxis].prevval = joyaxis[engineAxis].val;
joyaxis[engineAxis].val = value;
// fwd/side axis simulate hat movement
if( ( engineAxis == JOY_AXIS_SIDE || engineAxis == JOY_AXIS_FWD ) &&
( CL_IsInMenu() || CL_IsInConsole() ) )
{
int val = 0;
val |= Joy_GetHatValueForAxis( JOY_AXIS_SIDE );
val |= Joy_GetHatValueForAxis( JOY_AXIS_FWD );
Joy_HatMotionEvent( JOY_SIMULATED_HAT_ID, 0, val );
}
}
/*
=============
Joy_AxisMotionEvent
Axis events
=============
*/
void Joy_AxisMotionEvent( int id, byte axis, short value )
{
byte engineAxis;
if( !initialized )
return;
if( axis >= MAX_AXES )
{
MsgDev( D_INFO, "Only 6 axes is supported\n" );
return;
}
engineAxis = joyaxesmap[axis]; // convert to engine inner axis control
if( engineAxis == JOY_AXIS_NULL )
return;
if( value == joyaxis[engineAxis].val )
return; // it is not an update
if( engineAxis >= JOY_AXIS_RT )
Joy_ProcessTrigger( engineAxis, value );
else
Joy_ProcessStick( engineAxis, value );
}
/*
=============
Joy_BallMotionEvent
Trackball events. UNDONE
=============
*/
void Joy_BallMotionEvent( int id, byte ball, short xrel, short yrel )
{
//if( !initialized )
// return;
}
/*
=============
Joy_ButtonEvent
Button events
=============
*/
void Joy_ButtonEvent( int id, byte button, byte down )
{
if( !initialized )
return;
// generic game button code.
if( button > 32 )
{
int origbutton = button;
button = ( button & 31 ) + K_AUX1;
MsgDev( D_INFO, "Only 32 joybuttons is supported, converting %i button ID to %s\n", origbutton, Key_KeynumToString( button ) );
}
else button += K_AUX1;
Key_Event( button, down );
}
/*
=============
Joy_RemoveEvent
Called when joystick is removed. For future expansion
=============
*/
void Joy_RemoveEvent( int id )
{
if( !forcedisable && initialized && joy_found->integer )
Cvar_SetFloat("joy_found", joy_found->value - 1.0f);
}
/*
=============
Joy_RemoveEvent
Called when joystick is removed. For future expansion
=============
*/
void Joy_AddEvent( int id )
{
if( forcedisable )
return;
initialized = true;
Cvar_SetFloat("joy_found", joy_found->value + 1.0f);
}
/*
=============
Joy_FinalizeMove
Append movement from axis. Called everyframe
=============
*/
void Joy_FinalizeMove( float *fw, float *side, float *dpitch, float *dyaw )
{
if( !initialized || !joy_enable->integer )
return;
if( joy_axis_binding->modified )
{
char bind[7] = { 0 }; // fill it with zeros
size_t i;
Q_strncpy( bind, joy_axis_binding->string, sizeof(bind) );
for( i = 0; i < sizeof(bind); i++ )
{
switch( bind[i] )
{
case 's': joyaxesmap[i] = JOY_AXIS_SIDE; break;
case 'f': joyaxesmap[i] = JOY_AXIS_FWD; break;
case 'y': joyaxesmap[i] = JOY_AXIS_YAW; break;
case 'p': joyaxesmap[i] = JOY_AXIS_PITCH; break;
case 'r': joyaxesmap[i] = JOY_AXIS_RT; break;
case 'l': joyaxesmap[i] = JOY_AXIS_LT; break;
default : joyaxesmap[i] = JOY_AXIS_NULL; break;
}
}
joy_axis_binding->modified = false;
}
*fw -= joy_forward->value * (float)joyaxis[JOY_AXIS_FWD ].val/(float)SHRT_MAX; // must be form -1.0 to 1.0
*side += joy_side->value * (float)joyaxis[JOY_AXIS_SIDE].val/(float)SHRT_MAX;
#if !defined(XASH_SDL)
*dpitch += joy_pitch->value * (float)joyaxis[JOY_AXIS_PITCH].val/(float)SHRT_MAX * host.realframetime; // abs axis rotate is frametime related
*dyaw -= joy_yaw->value * (float)joyaxis[JOY_AXIS_YAW ].val/(float)SHRT_MAX * host.realframetime;
#else
// HACKHACK: SDL have inverted look axis.
*dpitch -= joy_pitch->value * (float)joyaxis[JOY_AXIS_PITCH].val/(float)SHRT_MAX * host.realframetime;
*dyaw += joy_yaw->value * (float)joyaxis[JOY_AXIS_YAW ].val/(float)SHRT_MAX * host.realframetime;
#endif
}
/*
=============
Joy_Init
Main init procedure
=============
*/
void Joy_Init( void )
{
joy_pitch = Cvar_Get( "joy_pitch", "100.0", CVAR_ARCHIVE, "joystick pitch sensitivity" );
joy_yaw = Cvar_Get( "joy_yaw", "100.0", CVAR_ARCHIVE, "joystick yaw sensitivity" );
joy_side = Cvar_Get( "joy_side", "1.0", CVAR_ARCHIVE, "joystick side sensitivity. Values from -1.0 to 1.0" );
joy_forward = Cvar_Get( "joy_forward", "1.0", CVAR_ARCHIVE, "joystick forward sensitivity. Values from -1.0 to 1.0" );
joy_lt_threshold = Cvar_Get( "joy_lt_threshold", "-16384", CVAR_ARCHIVE, "left trigger threshold. Value from -32768 to 32767");
joy_rt_threshold = Cvar_Get( "joy_rt_threshold", "-16384", CVAR_ARCHIVE, "right trigger threshold. Value from -32768 to 32767" );
// emit a key event at 75% axis move
joy_side_key_threshold = Cvar_Get( "joy_side_key_threshold", "24576", CVAR_ARCHIVE, "side axis key event emit threshold. Value from 0 to 32767" );
joy_forward_key_threshold = Cvar_Get( "joy_forward_key_threshold", "24576", CVAR_ARCHIVE, "forward axis key event emit threshold. Value from 0 to 32767");
// by default, we rely on deadzone detection come from system, but some glitchy devices report false deadzones
joy_side_deadzone = Cvar_Get( "joy_side_deadzone", "0", CVAR_ARCHIVE, "side axis deadzone. Value from 0 to 32767" );
joy_forward_deadzone = Cvar_Get( "joy_forward_deadzone", "0", CVAR_ARCHIVE, "forward axis deadzone. Value from 0 to 32767");
joy_pitch_deadzone = Cvar_Get( "joy_pitch_deadzone", "0", CVAR_ARCHIVE, "pitch axis deadzone. Value from 0 to 32767");
joy_yaw_deadzone = Cvar_Get( "joy_yaw_deadzone", "0", CVAR_ARCHIVE, "yaw axis deadzone. Value from 0 to 32767" );
joy_axis_binding = Cvar_Get( "joy_axis_binding", "sfpyrl", CVAR_ARCHIVE, "axis hardware id to engine inner axis binding, "
"s - side, f - forward, y - yaw, p - pitch, r - left trigger, l - right trigger" );
joy_found = Cvar_Get( "joy_found", "0", CVAR_READ_ONLY, "total num of connected joysticks" );
// we doesn't loaded config.cfg yet, so this cvar is not archive.
// change by +set joy_index in cmdline
joy_index = Cvar_Get( "joy_index", "0", CVAR_READ_ONLY, "current active joystick" );
joy_enable = Cvar_Get( "joy_enable", "1", CVAR_ARCHIVE, "enable joystick" );
if( Sys_CheckParm("-nojoy" ) )
{
forcedisable = true;
return;
}
#if defined(XASH_SDL)
// SDL can tell us about connected joysticks
Cvar_SetFloat( "joy_found", SDLash_JoyInit( joy_index->integer ) );
#elif defined(ANDROID)
// Initalized after first Joy_AddEvent
#else
#warning "Any platform must implement platform-dependent JoyInit, start event system. Otherwise no joystick support"
#endif
if( joy_found->integer > 0 )
initialized = true;
else
initialized = false;
}
/*
===========
Joy_Shutdown
Shutdown joystick code
===========
*/
void Joy_Shutdown( void )
{
Cvar_SetFloat( "joy_found", 0 );
initialized = false;
}
#endif // XASH_DEDICATED