ir.c File Reference

#include <stdio.h>
#include <math.h>
#include <time.h>
#include <unistd.h>
#include "definitions.h"
#include "wiiuse_internal.h"
#include "ir.h"

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Macros
#define	HEIGHT   (384.0f / 512.0f)
#define	MAX_SB_SLOPE   0.7f
#define	MIN_SB_WIDTH   0.1f
#define	SB_MIDDOT_REJECT   0.05f
#define	SB_WIDTH   19.5f
#define	SB_DOT_WIDTH   2.25f
#define	SB_DOT_HEIGHT   1.0f
#define	SB_DOT_WIDTH_RATIO   (SB_DOT_WIDTH / SB_WIDTH)
#define	SB_DOT_HEIGHT_RATIO   (SB_DOT_HEIGHT / SB_WIDTH)
#define	SB_OFF_SCREEN_X   0.0f
#define	SB_OFF_SCREEN_Y   0.0f
#define	SB_SINGLE_NOGUESS_DISTANCE   (100.0 * 100.0)
#define	SB_Z_COEFFICIENT   256.0f
#define	WIIMOTE_FOV_COEFFICIENT   0.39f
#define	SQUARED(x)   ((x)*(x))
#define	WMAX(x, y)   ((x>y)?(x):(y))
#define	WMIN(x, y)   ((x<y)?(x):(y))
#define	SMOOTH_IR_RADIUS   8.0f
#define	SMOOTH_IR_SPEED   0.25f
#define	SMOOTH_IR_DEADZONE   2.5f
#define	ERROR_MAX_COUNT   8
#define	GLITCH_MAX_COUNT   5
#define	GLITCH_DIST   (150.0f * 150.0f)

Enumerations
enum	{ IR_STATE_DEAD = 0, IR_STATE_GOOD, IR_STATE_SINGLE, IR_STATE_LOST }

Functions
static int	ir_correct_for_bounds (float *x, float *y, enum aspect_t aspect, int offset_x, int offset_y)
	Correct for the IR bounding box. More...
static void	ir_convert_to_vres (float *x, float *y, enum aspect_t aspect, unsigned int vx, unsigned int vy)
	Interpolate the point to the user defined virtual screen resolution. More...
static int	get_ir_sens (struct wiimote_t *wm, char **block1, char **block2)
	Get the IR sensitivity settings. More...
static void	rotate_dots (struct fdot_t *in, struct fdot_t *out, int count, float ang)
void	wiiuse_set_ir_mode (struct wiimote_t *wm)
void	wiiuse_set_ir (struct wiimote_t *wm, int status)
void	wiiuse_set_ir_vres (struct wiimote_t *wm, unsigned int x, unsigned int y)
	Set the virtual screen resolution for IR tracking. More...
void	wiiuse_set_ir_position (struct wiimote_t *wm, enum ir_position_t pos)
	Set the XY position for the IR cursor. More...
void	wiiuse_set_aspect_ratio (struct wiimote_t *wm, enum aspect_t aspect)
	Set the aspect ratio of the TV/monitor. More...
void	wiiuse_set_ir_sensitivity (struct wiimote_t *wm, int level)
	Set the IR sensitivity. More...
void	calculate_basic_ir (struct wiimote_t *wm, ubyte *data)
	Calculate the data from the IR spots. Basic IR mode. More...
void	calculate_extended_ir (struct wiimote_t *wm, ubyte *data)
	Calculate the data from the IR spots. Extended IR mode. More...
void	find_sensorbar (struct ir_t *ir, struct orient_t *orient)
	Interpret IR data into more user friendly variables. More...
void	apply_ir_smoothing (struct ir_t *ir)
	Smooth the IR pointer position. More...
void	interpret_ir_data (struct ir_t *ir, struct orient_t *orient)
	Interpret IR data into more user friendly variables. More...
float	calc_yaw (struct ir_t *ir)
	Calculate yaw given the IR data. More...

Macro Definition Documentation

ERROR_MAX_COUNT

#define ERROR_MAX_COUNT   8

GLITCH_DIST

#define GLITCH_DIST   (150.0f * 150.0f)

GLITCH_MAX_COUNT

#define GLITCH_MAX_COUNT   5

HEIGHT

#define HEIGHT   (384.0f / 512.0f)

MAX_SB_SLOPE

#define MAX_SB_SLOPE   0.7f

MIN_SB_WIDTH

#define MIN_SB_WIDTH   0.1f

SB_DOT_HEIGHT

#define SB_DOT_HEIGHT   1.0f

SB_DOT_HEIGHT_RATIO

#define SB_DOT_HEIGHT_RATIO   (SB_DOT_HEIGHT / SB_WIDTH)

SB_DOT_WIDTH

#define SB_DOT_WIDTH   2.25f

SB_DOT_WIDTH_RATIO

#define SB_DOT_WIDTH_RATIO   (SB_DOT_WIDTH / SB_WIDTH)

SB_MIDDOT_REJECT

#define SB_MIDDOT_REJECT   0.05f

SB_OFF_SCREEN_X

#define SB_OFF_SCREEN_X   0.0f

SB_OFF_SCREEN_Y

#define SB_OFF_SCREEN_Y   0.0f

SB_SINGLE_NOGUESS_DISTANCE

#define SB_SINGLE_NOGUESS_DISTANCE   (100.0 * 100.0)

SB_WIDTH

#define SB_WIDTH   19.5f

SB_Z_COEFFICIENT

#define SB_Z_COEFFICIENT   256.0f

SMOOTH_IR_DEADZONE

#define SMOOTH_IR_DEADZONE   2.5f

SMOOTH_IR_RADIUS

#define SMOOTH_IR_RADIUS   8.0f

SMOOTH_IR_SPEED

#define SMOOTH_IR_SPEED   0.25f

SQUARED

#define SQUARED

(

x

)

((x)*(x))

WIIMOTE_FOV_COEFFICIENT

#define WIIMOTE_FOV_COEFFICIENT   0.39f

WMAX

#define WMAX	(		x,
			y
	)		((x>y)?(x):(y))

WMIN

#define WMIN	(		x,
			y
	)		((x<y)?(x):(y))

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
IR_STATE_DEAD
IR_STATE_GOOD
IR_STATE_SINGLE
IR_STATE_LOST

Function Documentation

apply_ir_smoothing()

void apply_ir_smoothing

(

struct ir_t *

ir

)

Smooth the IR pointer position.

Parameters

ir	Pointer to an ir_t structure.

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calc_yaw()

float calc_yaw

(

struct ir_t *

ir

)

Calculate yaw given the IR data.

Parameters

ir	IR data structure.

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calculate_basic_ir()

void calculate_basic_ir	(	struct wiimote_t *	wm,
		ubyte *	data
	)

Calculate the data from the IR spots. Basic IR mode.

Parameters

wm	Pointer to a wiimote_t structure.
data	Data returned by the wiimote for the IR spots.

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calculate_extended_ir()

void calculate_extended_ir	(	struct wiimote_t *	wm,
		ubyte *	data
	)

Calculate the data from the IR spots. Extended IR mode.

Parameters

wm	Pointer to a wiimote_t structure.
data	Data returned by the wiimote for the IR spots.

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find_sensorbar()

void find_sensorbar	(	struct ir_t *	ir,
		struct orient_t *	orient
	)

Interpret IR data into more user friendly variables.

Parameters

wm	Pointer to a wiimote_t structure.

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get_ir_sens()

static int get_ir_sens ( struct wiimote_t *  wm, char **  block1, char **  block2  )

static

Get the IR sensitivity settings.

Parameters

wm	Pointer to a wiimote_t structure.
block1	[out] Pointer to where block1 will be set.
block2	[out] Pointer to where block2 will be set.

Returns

Returns the sensitivity level.

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interpret_ir_data()

void interpret_ir_data	(	struct ir_t *	ir,
		struct orient_t *	orient
	)

Interpret IR data into more user friendly variables.

Parameters

ir	Pointer to an ir_t structure.
orient	Pointer to an orient_t structure.

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ir_convert_to_vres()

static void ir_convert_to_vres ( float *  x, float *  y, enum aspect_t  aspect, unsigned int  vx, unsigned int  vy  )

static

Interpolate the point to the user defined virtual screen resolution.

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ir_correct_for_bounds()

static int ir_correct_for_bounds ( float *  x, float *  y, enum aspect_t  aspect, int  offset_x, int  offset_y  )

static

Correct for the IR bounding box.

Parameters

x	[out] The current X, it will be updated if valid.
y	[out] The current Y, it will be updated if valid.
aspect	Aspect ratio of the screen.
offset_x	The X offset of the bounding box.
offset_y	The Y offset of the bounding box.

Returns

Returns 1 if the point is valid and was updated.

Nintendo was smart with this bit. They sacrifice a little precision for a big increase in usability.

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rotate_dots()

static void rotate_dots ( struct fdot_t *  in, struct fdot_t *  out, int  count, float  ang  )

static

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wiiuse_set_aspect_ratio()

void wiiuse_set_aspect_ratio	(	struct wiimote_t *	wm,
		enum aspect_t	aspect
	)

Set the aspect ratio of the TV/monitor.

Parameters

wm	Pointer to a wiimote_t structure.
aspect	Either WIIUSE_ASPECT_16_9 or WIIUSE_ASPECT_4_3

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wiiuse_set_ir()

void wiiuse_set_ir	(	struct wiimote_t *	wm,
		int	status
	)

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wiiuse_set_ir_mode()

void wiiuse_set_ir_mode

(

struct wiimote_t *

wm

)

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wiiuse_set_ir_position()

void wiiuse_set_ir_position	(	struct wiimote_t *	wm,
		enum ir_position_t	pos
	)

Set the XY position for the IR cursor.

Parameters

wm	Pointer to a wiimote_t structure.

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wiiuse_set_ir_sensitivity()

void wiiuse_set_ir_sensitivity	(	struct wiimote_t *	wm,
		int	level
	)

Set the IR sensitivity.

Parameters

wm	Pointer to a wiimote_t structure.
level	1-5, same as Wii system sensitivity setting.

If the level is < 1, then level will be set to 1. If the level is > 5, then level will be set to 5.

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wiiuse_set_ir_vres()

void wiiuse_set_ir_vres	(	struct wiimote_t *	wm,
		unsigned int	x,
		unsigned int	y
	)

Set the virtual screen resolution for IR tracking.

Parameters

wm	Pointer to a wiimote_t structure.
status	1 to enable, 0 to disable.

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