Math

Detailed Description

Functions
Float64	StepEx (Float64 a, Float64 x)
Float32	Boxstep (Float32 a, Float32 b, Float32 x)
Float64	Boxstep (Float64 a, Float64 b, Float64 x)
Float32	Smoothstep (Float32 a, Float32 b, Float32 x)
Float64	Smoothstep (Float64 a, Float64 b, Float64 x)
Float32	Modulo (Float32 a, Float32 b)
Float64	Modulo (Float64 a, Float64 b)
Int32	LModulo (Int32 a, Int32 b)
Int64	LModulo (Int64 a, Int64 b)
Float32	Bias (Float32 b, Float32 x)
Float64	Bias (Float64 b, Float64 x)
Float32	Truncate (Float32 x)
Float64	Truncate (Float64 x)

Function Documentation

StepEx()

Float64 cinema::StepEx	(	Float64	a,
		Float64	x
	)

Returns 1.0 if x is greater than or equal to a, else 0.0.

Parameters

[in]	a	A double-precision floating point value.
[in]	x	A double-precision floating point value.

Returns

The step value (0.0 or 1.0).

Boxstep() [1/2]

Float32 cinema::Boxstep	(	Float32	a,
		Float32	b,
		Float32	x
	)

Returns 0.0 if x is less than a and 1.0 if x is greater than b, else returns x mapped on the range [a,b].

Parameters

[in]	a	A single-precision floating point value.
[in]	b	A single-precision floating point value.
[in]	x	A single-precision floating point value.

Returns

The box stepped value between 0.0 and 1.0.

Boxstep() [2/2]

Float64 cinema::Boxstep	(	Float64	a,
		Float64	b,
		Float64	x
	)

Returns 0.0 if x is less than a and 1.0 if x is greater than b, else returns x mapped on the range [a,b].

Parameters

[in]	a	A double-precision floating point value.
[in]	b	A double-precision floating point value.
[in]	x	A double-precision floating point value.

Returns

The box stepped value between 0.0 and 1.0.

Smoothstep() [1/2]

Float32 cinema::Smoothstep	(	Float32	a,
		Float32	b,
		Float32	x
	)

Returns 0.0 if x is less than a and 1.0 if x is greater than b, else returns x mapped on the range [a,b].

Note

The mapping is smoothed using an ease-in/ease-out curve.

Parameters

[in]	a	A single-precision floating point value.
[in]	b	A single-precision floating point value.
[in]	x	A single-precision floating point value.

Returns

The smoothed stepped value between 0.0 and 1.0.

Smoothstep() [2/2]

Float64 cinema::Smoothstep	(	Float64	a,
		Float64	b,
		Float64	x
	)

Returns 0.0 if x is less than a and 1.0 if x is greater than b, else returns x mapped on the range [a,b].

Note

The mapping is smoothed using an ease-in/ease-out curve.

Parameters

[in]	a	A double-precision floating point value.
[in]	b	A double-precision floating point value.
[in]	x	A double-precision floating point value.

Returns

The smoothed stepped value between 0.0 and 1.0.

Modulo() [1/2]

Float32 cinema::Modulo	(	Float32	a,
		Float32	b
	)

Returns a modulo b.

Parameters

[in]	a	A single-precision floating point value.
[in]	b	A single-precision floating point value.

Returns

The modulo value.

Modulo() [2/2]

Float64 cinema::Modulo	(	Float64	a,
		Float64	b
	)

Returns a modulo b.

Parameters

[in]	a	A double-precision floating point value.
[in]	b	A double-precision floating point value.

Returns

The modulo value.

LModulo() [1/2]

Int32 cinema::LModulo	(	Int32	a,
		Int32	b
	)

Returns a modulo b (integer modulo).

Parameters

[in]	a	A 32-bit integer value.
[in]	b	A 32-bit integer value.

Returns

The modulo value.

LModulo() [2/2]

Int64 cinema::LModulo	(	Int64	a,
		Int64	b
	)

Returns a modulo b (integer modulo).

Parameters

[in]	a	A 64-bit integer value.
[in]	b	A 64-bit integer value.

Returns

The modulo value.

Bias() [1/2]

Float32 cinema::Bias	(	Float32	b,
		Float32	x
	)

Returns the bias as the defined in the book "Texturing and Modeling" by Ebert.

Parameters

[in]	b	The bias value.
[in]	x	A single-precision floating point value.

Returns

The bias value.

Bias() [2/2]

Float64 cinema::Bias	(	Float64	b,
		Float64	x
	)

Returns the bias as the defined in the book "Texturing and Modeling" by Ebert.

Parameters

[in]	b	The bias value.
[in]	x	A double-precision floating point value.

Returns

The bias value.

Truncate() [1/2]

Float32 cinema::Truncate

(

Float32

x

)

Returns the next integer value towards zero.

Parameters

[in]

x

The 32-bit floating point value to truncate.

Returns

The truncated value.

Truncate() [2/2]

Float64 cinema::Truncate

(

Float64

x

)

Returns the next integer value towards zero.

Parameters

[in]

x

The 64-bit floating point value to truncate.

Returns

The truncated value.