Math Tools

Collection of math tools. More...

Topics
	Movement

Functions
static float	MathTools::FastSqrt (float x)
	Calculate Sqrt without std::sqrt.
static float	MathTools::RandFloat (float lower, float upper)
	Generates Random Floating Point Number using std::random_device.
static float	MathTools::DegToRad (float a)
	Converts angle in degrees to angle in radians.
static float	MathTools::RadToDeg (float a)
	Converts angle in radians to angle in degrees.
static std::vector< Vect >	MathTools::ScreenToWorldPersp (float x, float y)
	Takes a screen position and returns the world position at the near and far clip plane.

Detailed Description

Collection of math tools.

Function Documentation

DegToRad()

float MathTools::DegToRad ( float a )

static

Converts angle in degrees to angle in radians.

Parameters

a

Returns

float

FastSqrt()

float MathTools::FastSqrt ( float x )

static

Calculate Sqrt without std::sqrt.

//Runs in 2-5 cycles compared to std::sqrt's 10+ but has an errors percantage between 1%-4.5%
//Can be as far off as 1 whole unit
float MathTools::FastSqrt(float x) {
    union { float f; uint32_t i; } u = { x };
    u.i = 0x1FBD1DF5 + (u.i >> 1);  // Magic number approximation
    return u.f;
}

Parameters

x

Returns

float

RadToDeg()

float MathTools::RadToDeg ( float a )

static

Converts angle in radians to angle in degrees.

Parameters

a

Returns

float

RandFloat()

float MathTools::RandFloat ( float lower, float upper )

static

Generates Random Floating Point Number using std::random_device.

Parameters

lower
upper

Returns

float

ScreenToWorldPersp()

std::vector< Vect > MathTools::ScreenToWorldPersp ( float x, float y )

static

Takes a screen position and returns the world position at the near and far clip plane.

Parameters

x
y

Returns

std::vector<Vect>