U4DEngine::U4DNumerical Class Reference

The U4DNumerical provides numerical robustness in floating point comparison, rounding errors and random number generation. More...

Public Member Functions
	U4DNumerical ()
	Default constructor for U4DNumerical.
	~U4DNumerical ()
	Default destructor for U4DNumerical.
bool	areEqualAbs (float uNumber1, float uNumber2, float uEpsilon)
	Method which compares if two floating value are equal using absolute comparison. More...
bool	areEqualRel (float uNumber1, float uNumber2, float uEpsilon)
	Method which compares if two floating value are equal using relative comparison. More...
bool	areEqual (float uNumber1, float uNumber2, float uEpsilon)
	Method which compares if two floating value are equal. More...
float	getRandomNumberBetween (float uMinValue, float uMaxValue)
	Document this.
matrix_float4x4	convertToSIMD (U4DEngine::U4DMatrix4n &uMatrix)
	Converts 4x4 matrix to SIMD format. More...
matrix_float3x3	convertToSIMD (U4DEngine::U4DMatrix3n &uMatrix)
	Converts 3x3 matrix to SIMD format. More...
vector_float4	convertToSIMD (U4DEngine::U4DVector4n &uVector)
	Converts vector of 4 dimensions into SIMD format. More...
vector_float3	convertToSIMD (U4DEngine::U4DVector3n &uVector)
	Converts vector of 3 dimensions into SIMD format. More...
vector_float2	convertToSIMD (U4DEngine::U4DVector2n &uVector)
	Converts vector of 2 dimensions into SIMD format. More...
float	remapValue (float uValue, U4DVector2n &uRangeFrom, U4DVector2n &uRangeTo)
	Sets property used to determine if entity is within frustum. More...

Detailed Description

The U4DNumerical provides numerical robustness in floating point comparison, rounding errors and random number generation.

Member Function Documentation

areEqual()

bool U4DEngine::U4DNumerical::areEqual	(	float	uNumber1,
		float	uNumber2,
		float	uEpsilon
	)

Method which compares if two floating value are equal.

Parameters

uNumber1	Floating value to compare
uNumber2	Floating value to compare
uEpsilon	Epsilon used in comparison

Returns

Returns true if two floating value are equal

areEqualAbs()

bool U4DEngine::U4DNumerical::areEqualAbs	(	float	uNumber1,
		float	uNumber2,
		float	uEpsilon
	)

Method which compares if two floating value are equal using absolute comparison.

Parameters

uNumber1	Floating value to compare
uNumber2	Floating value to compare
uEpsilon	Epsilon used in comparison

Returns

Returns true if two floating value are equal

areEqualRel()

bool U4DEngine::U4DNumerical::areEqualRel	(	float	uNumber1,
		float	uNumber2,
		float	uEpsilon
	)

Method which compares if two floating value are equal using relative comparison.

Parameters

uNumber1	Floating value to compare
uNumber2	Floating value to compare
uEpsilon	Epsilon used in comparison

Returns

Returns true if two floating value are equal

convertToSIMD() [1/5]

matrix_float3x3 U4DEngine::U4DNumerical::convertToSIMD

(

U4DEngine::U4DMatrix3n &

uMatrix

)

Converts 3x3 matrix to SIMD format.

Converts 3x3 matrix to SIMD format used by the GPU shaders

Parameters

uMatrix

3x3 Matrix

Returns

Matrix in SIMD format

convertToSIMD() [2/5]

matrix_float4x4 U4DEngine::U4DNumerical::convertToSIMD

(

U4DEngine::U4DMatrix4n &

uMatrix

)

Converts 4x4 matrix to SIMD format.

Converts 4x4 matrix to SIMD format used by the GPU shaders

Parameters

uMatrix

3x3 Matrix

Returns

Matrix in SIMD format

convertToSIMD() [3/5]

vector_float2 U4DEngine::U4DNumerical::convertToSIMD

(

U4DEngine::U4DVector2n &

uVector

)

Converts vector of 2 dimensions into SIMD format.

Converts vector of 2n dimentsions into SIMD format

Parameters

uVector

2n vector dimension

Returns

vector in SIMD format

convertToSIMD() [4/5]

vector_float3 U4DEngine::U4DNumerical::convertToSIMD

(

U4DEngine::U4DVector3n &

uVector

)

Converts vector of 3 dimensions into SIMD format.

Converts vector of 3n dimentsions into SIMD format

Parameters

uVector

3n vector dimension

Returns

vector in SIMD format

convertToSIMD() [5/5]

vector_float4 U4DEngine::U4DNumerical::convertToSIMD

(

U4DEngine::U4DVector4n &

uVector

)

Converts vector of 4 dimensions into SIMD format.

Converts vector of 4n dimentsions into SIMD format

Parameters

uVector

4n vector dimension

Returns

vector in SIMD format

remapValue()

float U4DEngine::U4DNumerical::remapValue	(	float	uValue,
		U4DVector2n &	uRangeFrom,
		U4DVector2n &	uRangeTo
	)

Sets property used to determine if entity is within frustum.

If the property is set, the entity is rendered, else is ignored

Parameters

uValue

true for is within the frustum, false if is not