in_win.c

Quake 2 Source code for students by Theerthan You can also download from idsoftwares.com

/*
===========
IN_Move
===========
*/
void IN_Move (usercmd_t *cmd)
{
	IN_MouseMove (cmd);

	if (ActiveApp)
		IN_JoyMove (cmd);
}


/*
===================
IN_ClearStates
===================
*/
void IN_ClearStates (void)
{
	mx_accum = 0;
	my_accum = 0;
	mouse_oldbuttonstate = 0;
}


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

JOYSTICK

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

/* 
=============== 
IN_StartupJoystick 
=============== 
*/  
void IN_StartupJoystick (void) 
{ 
	int			numdevs;
	JOYCAPS		jc;
	MMRESULT	mmr;
	cvar_t		*cv;

 	// assume no joystick
	joy_avail = false; 

	// abort startup if user requests no joystick
	cv = Cvar_Get ("in_initjoy", "1", CVAR_NOSET);
	if ( !cv->value ) 
		return; 
 
	// verify joystick driver is present
	if ((numdevs = joyGetNumDevs ()) == 0)
	{
//		Com_Printf ("\njoystick not found -- driver not present\n\n");
		return;
	}

	// cycle through the joystick ids for the first valid one
	for (joy_id=0 ; joy_id<numdevs ; joy_id++)
	{
		memset (&ji, 0, sizeof(ji));
		ji.dwSize = sizeof(ji);
		ji.dwFlags = JOY_RETURNCENTERED;

		if ((mmr = joyGetPosEx (joy_id, &ji)) == JOYERR_NOERROR)
			break;
	} 

	// abort startup if we didn't find a valid joystick
	if (mmr != JOYERR_NOERROR)
	{
		Com_Printf ("\njoystick not found -- no valid joysticks (%x)\n\n", mmr);
		return;
	}

	// get the capabilities of the selected joystick
	// abort startup if command fails
	memset (&jc, 0, sizeof(jc));
	if ((mmr = joyGetDevCaps (joy_id, &jc, sizeof(jc))) != JOYERR_NOERROR)
	{
		Com_Printf ("\njoystick not found -- invalid joystick capabilities (%x)\n\n", mmr); 
		return;
	}

	// save the joystick's number of buttons and POV status
	joy_numbuttons = jc.wNumButtons;
	joy_haspov = jc.wCaps & JOYCAPS_HASPOV;

	// old button and POV states default to no buttons pressed
	joy_oldbuttonstate = joy_oldpovstate = 0;

	// mark the joystick as available and advanced initialization not completed
	// this is needed as cvars are not available during initialization

	joy_avail = true; 
	joy_advancedinit = false;

	Com_Printf ("\njoystick detected\n\n"); 
}


/*
===========
RawValuePointer
===========
*/
PDWORD RawValuePointer (int axis)
{
	switch (axis)
	{
	case JOY_AXIS_X:
		return &ji.dwXpos;
	case JOY_AXIS_Y:
		return &ji.dwYpos;
	case JOY_AXIS_Z:
		return &ji.dwZpos;
	case JOY_AXIS_R:
		return &ji.dwRpos;
	case JOY_AXIS_U:
		return &ji.dwUpos;
	case JOY_AXIS_V:
		return &ji.dwVpos;
	}
}


/*
===========
Joy_AdvancedUpdate_f
===========
*/
void Joy_AdvancedUpdate_f (void)
{

	// called once by IN_ReadJoystick and by user whenever an update is needed
	// cvars are now available
	int	i;
	DWORD dwTemp;

	// initialize all the maps
	for (i = 0; i < JOY_MAX_AXES; i++)
	{
		dwAxisMap[i] = AxisNada;
		dwControlMap[i] = JOY_ABSOLUTE_AXIS;
		pdwRawValue[i] = RawValuePointer(i);
	}

	if( joy_advanced->value == 0.0)
	{
		// default joystick initialization
		// 2 axes only with joystick control
		dwAxisMap[JOY_AXIS_X] = AxisTurn;
		// dwControlMap[JOY_AXIS_X] = JOY_ABSOLUTE_AXIS;
		dwAxisMap[JOY_AXIS_Y] = AxisForward;
		// dwControlMap[JOY_AXIS_Y] = JOY_ABSOLUTE_AXIS;
	}
	else
	{
		if (strcmp (joy_name->string, "joystick") != 0)
		{
			// notify user of advanced controller
			Com_Printf ("\n%s configured\n\n", joy_name->string);
		}

		// advanced initialization here
		// data supplied by user via joy_axisn cvars
		dwTemp = (DWORD) joy_advaxisx->value;
		dwAxisMap[JOY_AXIS_X] = dwTemp & 0x0000000f;
		dwControlMap[JOY_AXIS_X] = dwTemp & JOY_RELATIVE_AXIS;
		dwTemp = (DWORD) joy_advaxisy->value;
		dwAxisMap[JOY_AXIS_Y] = dwTemp & 0x0000000f;
		dwControlMap[JOY_AXIS_Y] = dwTemp & JOY_RELATIVE_AXIS;
		dwTemp = (DWORD) joy_advaxisz->value;
		dwAxisMap[JOY_AXIS_Z] = dwTemp & 0x0000000f;
		dwControlMap[JOY_AXIS_Z] = dwTemp & JOY_RELATIVE_AXIS;
		dwTemp = (DWORD) joy_advaxisr->value;
		dwAxisMap[JOY_AXIS_R] = dwTemp & 0x0000000f;
		dwControlMap[JOY_AXIS_R] = dwTemp & JOY_RELATIVE_AXIS;
		dwTemp = (DWORD) joy_advaxisu->value;
		dwAxisMap[JOY_AXIS_U] = dwTemp & 0x0000000f;
		dwControlMap[JOY_AXIS_U] = dwTemp & JOY_RELATIVE_AXIS;
		dwTemp = (DWORD) joy_advaxisv->value;
		dwAxisMap[JOY_AXIS_V] = dwTemp & 0x0000000f;
		dwControlMap[JOY_AXIS_V] = dwTemp & JOY_RELATIVE_AXIS;
	}

	// compute the axes to collect from DirectInput
	joy_flags = JOY_RETURNCENTERED | JOY_RETURNBUTTONS | JOY_RETURNPOV;
	for (i = 0; i < JOY_MAX_AXES; i++)
	{
		if (dwAxisMap[i] != AxisNada)
		{
			joy_flags |= dwAxisFlags[i];
		}
	}
}


/*
===========
IN_Commands
===========
*/
void IN_Commands (void)
{
	int		i, key_index;
	DWORD	buttonstate, povstate;

	if (!joy_avail)
	{
		return;
	}

	
	// loop through the joystick buttons
	// key a joystick event or auxillary event for higher number buttons for each state change
	buttonstate = ji.dwButtons;
	for (i=0 ; i < joy_numbuttons ; i++)
	{
		if ( (buttonstate & (1<<i)) && !(joy_oldbuttonstate & (1<<i)) )
		{
			key_index = (i < 4) ? K_JOY1 : K_AUX1;
			Key_Event (key_index + i, true, 0);
		}

		if ( !(buttonstate & (1<<i)) && (joy_oldbuttonstate & (1<<i)) )
		{
			key_index = (i < 4) ? K_JOY1 : K_AUX1;
			Key_Event (key_index + i, false, 0);
		}
	}
	joy_oldbuttonstate = buttonstate;

	if (joy_haspov)
	{
		// convert POV information into 4 bits of state information
		// this avoids any potential problems related to moving from one
		// direction to another without going through the center position
		povstate = 0;
		if(ji.dwPOV != JOY_POVCENTERED)
		{
			if (ji.dwPOV == JOY_POVFORWARD)
				povstate |= 0x01;
			if (ji.dwPOV == JOY_POVRIGHT)
				povstate |= 0x02;
			if (ji.dwPOV == JOY_POVBACKWARD)
				povstate |= 0x04;
			if (ji.dwPOV == JOY_POVLEFT)
				povstate |= 0x08;
		}
		// determine which bits have changed and key an auxillary event for each change
		for (i=0 ; i < 4 ; i++)
		{
			if ( (povstate & (1<<i)) && !(joy_oldpovstate & (1<<i)) )
			{
				Key_Event (K_AUX29 + i, true, 0);
			}

			if ( !(povstate & (1<<i)) && (joy_oldpovstate & (1<<i)) )
			{
				Key_Event (K_AUX29 + i, false, 0);
			}
		}
		joy_oldpovstate = povstate;
	}
}


/* 
=============== 
IN_ReadJoystick
=============== 
*/  
qboolean IN_ReadJoystick (void)
{

	memset (&ji, 0, sizeof(ji));
	ji.dwSize = sizeof(ji);
	ji.dwFlags = joy_flags;

	if (joyGetPosEx (joy_id, &ji) == JOYERR_NOERROR)
	{
		return true;
	}
	else
	{
		// read error occurred
		// turning off the joystick seems too harsh for 1 read error,\
		// but what should be done?
		// Com_Printf ("IN_ReadJoystick: no response\n");
		// joy_avail = false;
		return false;
	}
}


/*
===========
IN_JoyMove
===========
*/
void IN_JoyMove (usercmd_t *cmd)
{
	float	speed, aspeed;
	float	fAxisValue;
	int		i;

	// complete initialization if first time in
	// this is needed as cvars are not available at initialization time
	if( joy_advancedinit != true )
	{
		Joy_AdvancedUpdate_f();
		joy_advancedinit = true;
	}

	// verify joystick is available and that the user wants to use it
	if (!joy_avail || !in_joystick->value)
	{
		return; 
	}
 
	// collect the joystick data, if possible
	if (IN_ReadJoystick () != true)
	{
		return;
	}

	if ( (in_speed.state & 1) ^ (int)cl_run->value)
		speed = 2;
	else
		speed = 1;
	aspeed = speed * cls.frametime;

	// loop through the axes
	for (i = 0; i < JOY_MAX_AXES; i++)
	{
		// get the floating point zero-centered, potentially-inverted data for the current axis
		fAxisValue = (float) *pdwRawValue[i];
		// move centerpoint to zero
		fAxisValue -= 32768.0;

		// convert range from -32768..32767 to -1..1 
		fAxisValue /= 32768.0;

		switch (dwAxisMap[i])
		{
		case AxisForward:
			if ((joy_advanced->value == 0.0) && mlooking)
			{
				// user wants forward control to become look control
				if (fabs(fAxisValue) > joy_pitchthreshold->value)
				{		
					// if mouse invert is on, invert the joystick pitch value
					// only absolute control support here (joy_advanced is false)
					if (m_pitch->value < 0.0)
					{
						cl.viewangles[PITCH] -= (fAxisValue * joy_pitchsensitivity->value) * aspeed * cl_pitchspeed->value;
					}
					else
					{
						cl.viewangles[PITCH] += (fAxisValue * joy_pitchsensitivity->value) * aspeed * cl_pitchspeed->value;
					}
				}
			}
			else
			{
				// user wants forward control to be forward control
				if (fabs(fAxisValue) > joy_forwardthreshold->value)
				{
					cmd->forwardmove += (fAxisValue * joy_forwardsensitivity->value) * speed * cl_forwardspeed->value;
				}
			}
			break;

		case AxisSide:
			if (fabs(fAxisValue) > joy_sidethreshold->value)
			{
				cmd->sidemove += (fAxisValue * joy_sidesensitivity->value) * speed * cl_sidespeed->value;
			}
			break;

		case AxisUp:
			if (fabs(fAxisValue) > joy_upthreshold->value)
			{
				cmd->upmove += (fAxisValue * joy_upsensitivity->value) * speed * cl_upspeed->value;
			}
			break;

		case AxisTurn:
			if ((in_strafe.state & 1) || (lookstrafe->value && mlooking))
			{
				// user wants turn control to become side control
				if (fabs(fAxisValue) > joy_sidethreshold->value)
				{
					cmd->sidemove -= (fAxisValue * joy_sidesensitivity->value) * speed * cl_sidespeed->value;
				}
			}
			else
			{
				// user wants turn control to be turn control
				if (fabs(fAxisValue) > joy_yawthreshold->value)
				{
					if(dwControlMap[i] == JOY_ABSOLUTE_AXIS)
					{
						cl.viewangles[YAW] += (fAxisValue * joy_yawsensitivity->value) * aspeed * cl_yawspeed->value;
					}
					else
					{
						cl.viewangles[YAW] += (fAxisValue * joy_yawsensitivity->value) * speed * 180.0;
					}

				}
			}
			break;

		case AxisLook:
			if (mlooking)
			{
				if (fabs(fAxisValue) > joy_pitchthreshold->value)
				{
					// pitch movement detected and pitch movement desired by user
					if(dwControlMap[i] == JOY_ABSOLUTE_AXIS)
					{
						cl.viewangles[PITCH] += (fAxisValue * joy_pitchsensitivity->value) * aspeed * cl_pitchspeed->value;
					}
					else
					{
						cl.viewangles[PITCH] += (fAxisValue * joy_pitchsensitivity->value) * speed * 180.0;
					}
				}
			}
			break;

		default:
			break;
		}
	}
}