sr_math_utils Namespace Reference

Namespaces
namespace	filters
Classes
class	Random_
Typedefs
typedef boost::detail::thread::singleton < class Random_ >	Random
Functions
static uint64_t	counter_with_overflow (uint64_t full_value, uint16_t new_value)
static int	ipow (int base, int exp)
static bool	is_bit_mask_index_false (int bit_mask, int index)
static bool	is_bit_mask_index_true (int bit_mask, int index)
static double	linear_interpolate_ (double x, double x0, double y0, double x1, double y1)
static int	sign (double x)
static double	to_degrees (double rad)
static double	to_rad (double degrees)
Variables
static const double	pi = 3.14159265

---

Typedef Documentation

typedef boost::detail::thread::singleton< class Random_ > sr_math_utils::Random

This is the usable singleton of the Random class.

The typical usage for this class is: -> generate double betwen 0 and 1 sr_math_utils::Random::instance().generate<double>()

-> generate integer between 0 and 10 sr_math_utils::Random::instance().generate<int>(0, 10)

-> generate double betwen 0 and 10 sr_math_utils::Random::instance().generate<double>(0, 10)

Definition at line 329 of file sr_math_utils.hpp.

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Function Documentation

static uint64_t sr_math_utils::counter_with_overflow	(	uint64_t	full_value,
		uint16_t	new_value
	)		[inline, static]

Increment a counter given a value which can overflow.

WARNING: only works if called often enough: if new_value > last_value but overflowed between the 2 calls, then we're not able to detect the overflow.

Parameters:

full_value	the full value (with no overflow)
new_value	the new value we received from the motor.

Returns:

The new full value

Definition at line 104 of file sr_math_utils.hpp.

static int sr_math_utils::ipow	(	int	base,
		int	exp
	)		[inline, static]

Definition at line 66 of file sr_math_utils.hpp.

static bool sr_math_utils::is_bit_mask_index_false	(	int	bit_mask,
		int	index
	)		[inline, static]

Definition at line 88 of file sr_math_utils.hpp.

static bool sr_math_utils::is_bit_mask_index_true	(	int	bit_mask,
		int	index
	)		[inline, static]

Definition at line 80 of file sr_math_utils.hpp.

static double sr_math_utils::linear_interpolate_	(	double	x,
		double	x0,
		double	y0,
		double	x1,
		double	y1
	)		[inline, static]

Interpolate linearly between the 2 points, for the given value

y = y0 + (x-x0)*((y1-y0)/(x1-x0))

Parameters:

x	the X value to compute the interpolation for.
x0	the X value of our first point
y0	the Y value of our first point
x1	the X value of our second point
y1	the Y value of our second point

Returns:

the computed Y value (calibrated value)

Definition at line 131 of file sr_math_utils.hpp.

static int sr_math_utils::sign

(

double

x

)

[inline, static]

Checks the sign of a given number.

Parameters:

x	the number we want to study.

Returns:

1 if x is positive, -1 if negative.

Definition at line 154 of file sr_math_utils.hpp.

static double sr_math_utils::to_degrees

(

double

rad

)

[inline, static]

Convert an angle in degrees to an angle in degrees.

Parameters:

degrees

the value in radians.

Returns:

the value in degrees.

Definition at line 61 of file sr_math_utils.hpp.

static double sr_math_utils::to_rad

(

double

degrees

)

[inline, static]

Convert an angle in degrees to an angle in radians.

Parameters:

degrees

the value in degrees

Returns:

the value in radians.

Definition at line 49 of file sr_math_utils.hpp.

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Variable Documentation

const double sr_math_utils::pi = 3.14159265 [static]

Definition at line 40 of file sr_math_utils.hpp.