A collection of common math functions. More...

Static Public Member Functions
static FP	Abs (FP value)
	Returns the absolute value of the argument. More...

static FP	Acos (FP value)
	Returns the arc-cosine of value - the angle in radians whose cosine is value . More...

static FP	AngleBetweenDegrees (FP source, FP target)
	Calculates the smallest signed angle between any two angles. F.e. angle between -179 and 179 is -2. Rotation is ccw. More...

static Int64	AngleBetweenDegreesRaw (Int64 source, Int64 target)
	Same as AngleBetweenDegrees using Raw optimization. More...

static FP	AngleBetweenRadians (FP source, FP target)
	Calculates the smallest signed angle between any two angles. More...

static Int64	AngleBetweenRadiansRaw (Int64 source, Int64 target)
	Same as AngleBetweenDegrees using Raw optimization. More...

static FP	Asin (FP value)
	Returns the arc-sine of value - the angle in radians whose sine is value . More...

static FP	Atan (FP value)
	Returns the arc-tangent of value - the angle in radians whose tangent is value . More...

static FP	Atan2 (FP y, FP x)
	Returns the angle in radians whose Tan(FP) is y /x . This function returns correct angle even if x is zero. More...

static FP	Barycentric (FP value1, FP value2, FP value3, FP t1, FP t2)
	Performs barycentric interpolation. More...

static FP	CatmullRom (FP value1, FP value2, FP value3, FP value4, FP t)
	Performs Cotmull-Rom interpolation. More...

static FP	Ceiling (FP value)
	Returns the smallest integer larger than or equal to value . More...

static Int32	CeilToInt (FP value)
	Returns the smallest integer larger than or equal to value . More...

static FP	Clamp (FP value, FP min, FP max)
	Clamps the given value between the given minimum and maximum values. More...

static Int32	Clamp (Int32 value, Int32 min, Int32 max)
	Clamps the given value between the given minimum and maximum values. More...

static Int64	Clamp (Int64 value, Int64 min, Int64 max)
	Clamps the given value between the given minimum and maximum values. More...

static FP	Clamp01 (FP value)
	Clamps the given value between 0 and 1. More...

static FP	ClampUseable (FP value)
	Clamps the given value between FP.UseableMin and FP.UseableMax. More...

static FP	Cos (FP rad)
	Returns the cosine of angle rad . More...

static FP	CosHighPrecision (FP rad)
	Returns the high precision cosine of angle rad . More...

static FP	Exp (FP x)
	Returns e raised to the specified power. The max relative error is ~0.3% in the range of [-6, 32]. More...

static FP	Floor (FP value)
	Returns the largest integer smaller than or equal to value . More...

static Int32	FloorToInt (FP value)
	Returns the largest integer smaller than or equal to value . More...

static FP	Fraction (FP value)
	Returns the fractional part of the argument. More...

static FP	Hermite (FP value1, FP tangent1, FP value2, FP tangent2, FP t)
	Performs cubic Hermite interpolation. More...

static FP	InverseLerp (FP start, FP end, FP value)
	Calculates the linear parameter that produces the interpolant value within the range [start , end ]. The result is clamped to the range [0, 1]. More...

static FP	InverseLerpUnclamped (FP start, FP end, FP value)
	Calculates the linear parameter that produces the interpolant value within the range [start , end ]. More...

static FP	Lerp (FP start, FP end, FP t)
	Linearly interpolates between start and end by t . t is clamped to the range [0, 1] More...

static FP	LerpRadians (FP start, FP end, FP t)
	Linearly interpolates between start and end by t . t is clamped to the range [0, 1]. The difference between start and end is converted to a [-Pi/2, Pi/2] range. More...

static FP	LerpUnclamped (FP start, FP end, FP t)
	Linearly interpolates between start and end by t . More...

static FP	Ln (FP value)
	Returns natural logarithm of value . More...

static FP	Log (FP value, FP logBase)
	Returns logarithm of value in base logBase . It is much more performant and precise to use Log2, Log10 and Ln if logBase is 2, 10 or e. More...

static FP	Log10 (FP value)
	Returns logarithm of value in base 10. More...

static FP	Log2 (FP value)
	Returns logarithm of value in base 2. More...

static Int32	Log2CeilingToInt (FP value)
	Returns celining of the logarithm of value in base 2. It is much faster than calling FPMath.Log2(FP) and then FPMath.CeilToInt(FP) More...

static Int32	Log2FloorToInt (FP value)
	Returns floor of the logarithm of value in base 2. It is much faster than calling FPMath.Log2(FP) and then FPMath.FloorToInt(FP) More...

static FP	Max (FP val1, FP val2)
	Returns the largest of two or more values. More...

static FP	Max (params FP[] numbers)
	Returns the largest of two or more values. More...

static FP	Min (FP val1, FP val2)
	Returns the smallest of two or more values. More...

static FP	Min (params FP[] numbers)
	Returns the smallest of two or more values. More...

static void	MinMax (FP a, FP b, out FP min, out FP max)

static FP	ModuloClamped (FP a, FP n)
	Performs modulo operation without forcing the sign of the dividend: So that ModuloClamped(-9, 10) = 1. More...

static Int64	ModuloClamped (Int64 a, Int64 n)
	Performs modulo operation without forcing the sign of the dividend: So that ModuloClamped(-9, 10) = 1. More...

static Int32	NextPowerOfTwo (Int32 value)
	Returns the next power of two that is equal to, or greater than, the argument. More...

static FP	Repeat (FP t, FP length)
	Loops the value t , so that it is never larger than length and never smaller than 0. More...

static FP	Round (FP value)
	Returns value rounded to the nearest integer. More...

static Int32	RoundToInt (FP value)
	Returns value rounded to the nearest integer. More...

static FP	Sign (FP value)
	Returns the sign of value . More...

static Int32	SignInt (FP value)
	Returns the sign of value . More...

static FP	SignZero (FP value)
	Returns the sign of value if it is non-zero. More...

static Int32	SignZeroInt (FP value)
	Returns the sign of value if it is non-zero. More...

static FP	Sin (FP rad)
	Returns the sine of angle rad . More...

static void	SinCos (FP rad, out FP sin, out FP cos)
	Calculates sine and cosine of angle rad . It is faster than calling Sin(FP) and Cos(FP) separately. More...

static void	SinCosHighPrecision (FP rad, out FP sin, out FP cos)
	Calculates high precision sine and cosine of angle rad . It is faster than calling SinHighPrecision(FP) and CosHighPrecision(FP) separately. More...

static FP	SinHighPrecision (FP rad)
	Returns the high precision sine of angle rad . More...

static FP	SmoothStep (FP start, FP end, FP t)
	Interpolates between start and end with smoothing at the limits. Equivalent of calling Hermite(FP, FP, FP, FP, FP) with tangents set to 0 and clamping t between 0 and 1. More...

static FP	Sqrt (FP value)
	Returns square root of value . More...

static FP	Tan (FP rad)
	Returns the tangent of angle rad . More...

Detailed Description

A collection of common math functions.

Member Function Documentation

◆ Sign()

static FP Photon.Deterministic.FPMath.Sign ( FP value )

inlinestatic

Returns the sign of value .

Parameters

value

Returns: 1 when positive or zero, -1 when negative

◆ SignZero()

static FP Photon.Deterministic.FPMath.SignZero ( FP value )

inlinestatic

Returns the sign of value if it is non-zero.

Parameters

value

Returns: 1 when positive, 0 when zero, -1 when negative

◆ SignInt()

static Int32 Photon.Deterministic.FPMath.SignInt ( FP value )

inlinestatic

Returns the sign of value .

Parameters

value

Returns: 1 when positive or zero, -1 when negative

◆ SignZeroInt()

static Int32 Photon.Deterministic.FPMath.SignZeroInt ( FP value )

inlinestatic

Returns the sign of value if it is non-zero.

Parameters

value

Returns: 1 when positive, 0 when zero, -1 when negative

◆ NextPowerOfTwo()

static Int32 Photon.Deterministic.FPMath.NextPowerOfTwo ( Int32 value )

inlinestatic

Returns the next power of two that is equal to, or greater than, the argument.

Parameters

value

Returns

◆ Abs()

static FP Photon.Deterministic.FPMath.Abs ( FP value )

inlinestatic

Returns the absolute value of the argument.

Parameters

value

Returns

◆ Round()

static FP Photon.Deterministic.FPMath.Round ( FP value )

inlinestatic

Returns value rounded to the nearest integer.

Parameters

value

Returns

◆ RoundToInt()

static Int32 Photon.Deterministic.FPMath.RoundToInt ( FP value )

inlinestatic

Returns value rounded to the nearest integer.

Parameters

value

Returns

◆ Floor()

static FP Photon.Deterministic.FPMath.Floor ( FP value )

inlinestatic

Returns the largest integer smaller than or equal to value .

Parameters

value

Returns

◆ FloorToInt()

static Int32 Photon.Deterministic.FPMath.FloorToInt ( FP value )

inlinestatic

Returns the largest integer smaller than or equal to value .

Parameters

value

Returns

◆ Ceiling()

static FP Photon.Deterministic.FPMath.Ceiling ( FP value )

inlinestatic

Returns the smallest integer larger than or equal to value .

Parameters

value

Returns

◆ CeilToInt()

static Int32 Photon.Deterministic.FPMath.CeilToInt ( FP value )

inlinestatic

Returns the smallest integer larger than or equal to value .

Parameters

value

Returns

◆ Max() [1/2]

static FP Photon.Deterministic.FPMath.Max	(	FP	val1,
		FP	val2
	)

inlinestatic

Returns the largest of two or more values.

Parameters

val1
val2

Returns

◆ Min() [1/2]

static FP Photon.Deterministic.FPMath.Min	(	FP	val1,
		FP	val2
	)

inlinestatic

Returns the smallest of two or more values.

Parameters

val1
val2

Returns

◆ Min() [2/2]

static FP Photon.Deterministic.FPMath.Min ( params FP[] numbers )

inlinestatic

Returns the smallest of two or more values.

Parameters

numbers

Returns

◆ Max() [2/2]

static FP Photon.Deterministic.FPMath.Max ( params FP[] numbers )

inlinestatic

Returns the largest of two or more values.

Parameters

numbers

Returns

◆ MinMax()

static void Photon.Deterministic.FPMath.MinMax	(	FP	a,
		FP	b,
		out FP	min,
		out FP	max
	)

inlinestatic

Parameters

a
b
min
max

◆ Clamp() [1/3]

static FP Photon.Deterministic.FPMath.Clamp	(	FP	value,
		FP	min,
		FP	max
	)

inlinestatic

Clamps the given value between the given minimum and maximum values.

Parameters

value
min
max

Returns

◆ Clamp01()

static FP Photon.Deterministic.FPMath.Clamp01 ( FP value )

inlinestatic

Clamps the given value between 0 and 1.

Parameters

value

Returns

◆ Clamp() [2/3]

static Int32 Photon.Deterministic.FPMath.Clamp	(	Int32	value,
		Int32	min,
		Int32	max
	)

inlinestatic

Clamps the given value between the given minimum and maximum values.

Parameters

value
min
max

Returns

◆ Clamp() [3/3]

static Int64 Photon.Deterministic.FPMath.Clamp	(	Int64	value,
		Int64	min,
		Int64	max
	)

inlinestatic

Clamps the given value between the given minimum and maximum values.

Parameters

value
min
max

Returns

◆ ClampUseable()

static FP Photon.Deterministic.FPMath.ClampUseable ( FP value )

inlinestatic

Clamps the given value between FP.UseableMin and FP.UseableMax.

Parameters

value

Returns

◆ Fraction()

static FP Photon.Deterministic.FPMath.Fraction ( FP value )

inlinestatic

Returns the fractional part of the argument.

Parameters

value

Returns

◆ Repeat()

static FP Photon.Deterministic.FPMath.Repeat	(	FP	t,
		FP	length
	)

inlinestatic

Loops the value t , so that it is never larger than length and never smaller than 0.

Parameters

t
length

Returns

◆ LerpRadians()

static FP Photon.Deterministic.FPMath.LerpRadians	(	FP	start,
		FP	end,
		FP	t
	)

inlinestatic

Linearly interpolates between start and end by t . t is clamped to the range [0, 1]. The difference between start and end is converted to a [-Pi/2, Pi/2] range.

Parameters

start
end
t

Returns

◆ Lerp()

static FP Photon.Deterministic.FPMath.Lerp	(	FP	start,
		FP	end,
		FP	t
	)

inlinestatic

Linearly interpolates between start and end by t . t is clamped to the range [0, 1]

Parameters

start
end
t

Returns

◆ LerpUnclamped()

static FP Photon.Deterministic.FPMath.LerpUnclamped	(	FP	start,
		FP	end,
		FP	t
	)

inlinestatic

Linearly interpolates between start and end by t .

Parameters

start
end
t

Returns

◆ InverseLerp()

static FP Photon.Deterministic.FPMath.InverseLerp	(	FP	start,
		FP	end,
		FP	value
	)

inlinestatic

Calculates the linear parameter that produces the interpolant value within the range [start , end ]. The result is clamped to the range [0, 1].

Returns 0 if start and end are equal.

Parameters

start
end
value

Returns

◆ InverseLerpUnclamped()

static FP Photon.Deterministic.FPMath.InverseLerpUnclamped	(	FP	start,
		FP	end,
		FP	value
	)

inlinestatic

Calculates the linear parameter that produces the interpolant value within the range [start , end ].

The resultant factor is NOT clamped to the range [0, 1].

Returns 0 if start and end are equal.

Parameters

start
end
value

Returns

◆ SmoothStep()

static FP Photon.Deterministic.FPMath.SmoothStep	(	FP	start,
		FP	end,
		FP	t
	)

inlinestatic

Interpolates between start and end with smoothing at the limits. Equivalent of calling Hermite(FP, FP, FP, FP, FP) with tangents set to 0 and clamping t between 0 and 1.

Parameters

start
end
t

Returns

◆ Sqrt()

static FP Photon.Deterministic.FPMath.Sqrt ( FP value )

inlinestatic

Returns square root of value .

FPLut needs to be initialised.

Parameters

value

Returns

Exceptions

System.ArgumentOutOfRangeException Thrown when value is less than 0

◆ Barycentric()

static FP Photon.Deterministic.FPMath.Barycentric	(	FP	value1,
		FP	value2,
		FP	value3,
		FP	t1,
		FP	t2
	)

inlinestatic

Performs barycentric interpolation.

Parameters

value1
value2
value3
t1
t2

Returns: value1 + (value2 - value1 ) * t1 + (value3 - value1 ) * t2

◆ CatmullRom()

static FP Photon.Deterministic.FPMath.CatmullRom	(	FP	value1,
		FP	value2,
		FP	value3,
		FP	value4,
		FP	t
	)

inlinestatic

Performs Cotmull-Rom interpolation.

Parameters

value1
value2
value3
value4
t

Returns

◆ Hermite()

static FP Photon.Deterministic.FPMath.Hermite	(	FP	value1,
		FP	tangent1,
		FP	value2,
		FP	tangent2,
		FP	t
	)

inlinestatic

Performs cubic Hermite interpolation.

Parameters

value1
tangent1
value2
tangent2
t

Returns

◆ ModuloClamped() [1/2]

static Int64 Photon.Deterministic.FPMath.ModuloClamped	(	Int64	a,
		Int64	n
	)

inlinestatic

Performs modulo operation without forcing the sign of the dividend: So that ModuloClamped(-9, 10) = 1.

Parameters

a	Dividend
n	Divisor

Returns: Remainder after division

Exceptions

System.InvalidOperationException	When n > Int64.MaxValue >> 2 or n < Int64.MinValue >> 2
System.DivideByZeroException	When n == 0

◆ ModuloClamped() [2/2]

static FP Photon.Deterministic.FPMath.ModuloClamped	(	FP	a,
		FP	n
	)

inlinestatic

Performs modulo operation without forcing the sign of the dividend: So that ModuloClamped(-9, 10) = 1.

Parameters

a	Dividend
n	Divisor

Returns: Remainder after division

Exceptions

System.InvalidOperationException	When n > FP.UseableMax or n < FP.UseableMin
System.DivideByZeroException	When n == 0

◆ AngleBetweenDegrees()

static FP Photon.Deterministic.FPMath.AngleBetweenDegrees	(	FP	source,
		FP	target
	)

inlinestatic

Calculates the smallest signed angle between any two angles. F.e. angle between -179 and 179 is -2. Rotation is ccw.

Parameters

source	Source angle in degrees
target	Target angle in degrees

Returns

◆ AngleBetweenDegreesRaw()

static Int64 Photon.Deterministic.FPMath.AngleBetweenDegreesRaw	(	Int64	source,
		Int64	target
	)

inlinestatic

Same as AngleBetweenDegrees using Raw optimization.

Parameters

source	Source angle in degrees (Raw)
target	Target angle in degrees (Raw)

Returns

◆ AngleBetweenRadians()

static FP Photon.Deterministic.FPMath.AngleBetweenRadians	(	FP	source,
		FP	target
	)

inlinestatic

Calculates the smallest signed angle between any two angles.

Parameters

source	Source angle in radians
target	Target angle in radians

Returns

◆ AngleBetweenRadiansRaw()

static Int64 Photon.Deterministic.FPMath.AngleBetweenRadiansRaw	(	Int64	source,
		Int64	target
	)

inlinestatic

Same as AngleBetweenDegrees using Raw optimization.

Parameters

source	Source angle in radians (Raw)
target	Target angle in radians (Raw)

Returns

◆ Log2FloorToInt()

static Int32 Photon.Deterministic.FPMath.Log2FloorToInt ( FP value )

inlinestatic

Returns floor of the logarithm of value in base 2. It is much faster than calling FPMath.Log2(FP) and then FPMath.FloorToInt(FP)

FPLut needs to be initialised.

Parameters

value

Returns

◆ Log2CeilingToInt()

static Int32 Photon.Deterministic.FPMath.Log2CeilingToInt ( FP value )

inlinestatic

Returns celining of the logarithm of value in base 2. It is much faster than calling FPMath.Log2(FP) and then FPMath.CeilToInt(FP)

FPLut needs to be initialised.

Parameters

value

Returns

◆ Log2()

static FP Photon.Deterministic.FPMath.Log2 ( FP value )

inlinestatic

Returns logarithm of value in base 2.

FPLut needs to be initialised.

Parameters

value

Returns

◆ Ln()

static FP Photon.Deterministic.FPMath.Ln ( FP value )

inlinestatic

Returns natural logarithm of value .

FPLut needs to be initialised.

Parameters

value

Returns

◆ Log10()

static FP Photon.Deterministic.FPMath.Log10 ( FP value )

inlinestatic

Returns logarithm of value in base 10.

FPLut needs to be initialised.

Parameters

value

Returns

◆ Log()

static FP Photon.Deterministic.FPMath.Log	(	FP	value,
		FP	logBase
	)

inlinestatic

Returns logarithm of value in base logBase . It is much more performant and precise to use Log2, Log10 and Ln if logBase is 2, 10 or e.

FPLut needs to be initialised.

Parameters

value
logBase

Returns

◆ Exp()

static FP Photon.Deterministic.FPMath.Exp ( FP x )

inlinestatic

Returns e raised to the specified power. The max relative error is ~0.3% in the range of [-6, 32].

Parameters

x

Returns

◆ Sin()

static FP Photon.Deterministic.FPMath.Sin ( FP rad )

inlinestatic

Returns the sine of angle rad .

FPLut needs to be initialised.

Parameters

rad	Angle in radians

Returns

◆ SinHighPrecision()

static FP Photon.Deterministic.FPMath.SinHighPrecision ( FP rad )

inlinestatic

Returns the high precision sine of angle rad .

FPLut needs to be initialised.

Parameters

rad	Angle in radians

Returns

◆ Cos()

static FP Photon.Deterministic.FPMath.Cos ( FP rad )

inlinestatic

Returns the cosine of angle rad .

FPLut needs to be initialised.

Parameters

rad	Angle in radians

Returns

◆ CosHighPrecision()

static FP Photon.Deterministic.FPMath.CosHighPrecision ( FP rad )

inlinestatic

Returns the high precision cosine of angle rad .

FPLut needs to be initialised.

Parameters

rad	Angle in radians

Returns

◆ SinCos()

static void Photon.Deterministic.FPMath.SinCos	(	FP	rad,
		out FP	sin,
		out FP	cos
	)

inlinestatic

Calculates sine and cosine of angle rad . It is faster than calling Sin(FP) and Cos(FP) separately.

FPLut needs to be initialised.

Parameters

rad	Angle in radians
sin
cos

◆ SinCosHighPrecision()

static void Photon.Deterministic.FPMath.SinCosHighPrecision	(	FP	rad,
		out FP	sin,
		out FP	cos
	)

inlinestatic

Calculates high precision sine and cosine of angle rad . It is faster than calling SinHighPrecision(FP) and CosHighPrecision(FP) separately.

FPLut needs to be initialised.

Parameters

rad	Angle in radians
sin
cos

◆ Tan()

static FP Photon.Deterministic.FPMath.Tan ( FP rad )

inlinestatic

Returns the tangent of angle rad .

FPLut needs to be initialised.

Parameters

rad	Angle in radians

Returns

◆ Asin()

static FP Photon.Deterministic.FPMath.Asin ( FP value )

inlinestatic

Returns the arc-sine of value - the angle in radians whose sine is value .

FPLut needs to be initialised.

Parameters

value

Returns

◆ Acos()

static FP Photon.Deterministic.FPMath.Acos ( FP value )

inlinestatic

Returns the arc-cosine of value - the angle in radians whose cosine is value .

FPLut needs to be initialised.

Parameters

value

Returns

◆ Atan()

static FP Photon.Deterministic.FPMath.Atan ( FP value )

inlinestatic

Returns the arc-tangent of value - the angle in radians whose tangent is value .

FPLut needs to be initialised.

Parameters

value

Returns

◆ Atan2()

static FP Photon.Deterministic.FPMath.Atan2	(	FP	y,
		FP	x
	)

inlinestatic

Returns the angle in radians whose Tan(FP) is y /x . This function returns correct angle even if x is zero.

FPLut needs to be initialised.

Parameters

y
x

Returns

Photon Quantum 2.1.1

Static Public Member Functions

Detailed Description

Member Function Documentation

◆ Sign()

◆ SignZero()

◆ SignInt()

◆ SignZeroInt()

◆ NextPowerOfTwo()

◆ Abs()

◆ Round()

◆ RoundToInt()

◆ Floor()

◆ FloorToInt()

◆ Ceiling()

◆ CeilToInt()

◆ Max() [1/2]

◆ Min() [1/2]

◆ Min() [2/2]

◆ Max() [2/2]

◆ MinMax()

◆ Clamp() [1/3]

◆ Clamp01()

◆ Clamp() [2/3]

◆ Clamp() [3/3]

◆ ClampUseable()

◆ Fraction()

◆ Repeat()

◆ LerpRadians()

◆ Lerp()

◆ LerpUnclamped()

◆ InverseLerp()

◆ InverseLerpUnclamped()

◆ SmoothStep()

◆ Sqrt()

◆ Barycentric()

◆ CatmullRom()

◆ Hermite()

◆ ModuloClamped() [1/2]

◆ ModuloClamped() [2/2]

◆ AngleBetweenDegrees()

◆ AngleBetweenDegreesRaw()

◆ AngleBetweenRadians()

◆ AngleBetweenRadiansRaw()

◆ Log2FloorToInt()

◆ Log2CeilingToInt()

◆ Log2()

◆ Ln()

◆ Log10()

◆ Log()

◆ Exp()

◆ Sin()

◆ SinHighPrecision()

◆ Cos()

◆ CosHighPrecision()

◆ SinCos()

◆ SinCosHighPrecision()

◆ Tan()

◆ Asin()

◆ Acos()

◆ Atan()

◆ Atan2()