C# Class MS.Internal.DoubleUtil

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Public Methods

Method	Description
AreClose ( Point point1, Point point2 ) : bool	Compares two points for fuzzy equality. This function helps compensate for the fact that double values can acquire error when operated upon
AreClose ( Rect rect1, Rect rect2 ) : bool	Compares two rectangles for fuzzy equality. This function helps compensate for the fact that double values can acquire error when operated upon
AreClose ( Size size1, Size size2 ) : bool	Compares two Size instances for fuzzy equality. This function helps compensate for the fact that double values can acquire error when operated upon
AreClose ( System vector1, System vector2 ) : bool	Compares two Vector instances for fuzzy equality. This function helps compensate for the fact that double values can acquire error when operated upon
AreClose ( double value1, double value2 ) : bool	AreClose - Returns whether or not two doubles are "close". That is, whether or not they are within epsilon of each other. Note that this epsilon is proportional to the numbers themselves to that AreClose survives scalar multiplication. There are plenty of ways for this to return false even for numbers which are theoretically identical, so no code calling this should fail to work if this returns false. This is important enough to repeat: NB: NO CODE CALLING THIS FUNCTION SHOULD DEPEND ON ACCURATE RESULTS - this should be used for optimizations only.
DoubleToInt ( double val ) : int
GreaterThan ( double value1, double value2 ) : bool	GreaterThan - Returns whether or not the first double is greater than the second double. That is, whether or not the first is strictly greater than and not within epsilon of the other number. Note that this epsilon is proportional to the numbers themselves to that AreClose survives scalar multiplication. Note, There are plenty of ways for this to return false even for numbers which are theoretically identical, so no code calling this should fail to work if this returns false. This is important enough to repeat: NB: NO CODE CALLING THIS FUNCTION SHOULD DEPEND ON ACCURATE RESULTS - this should be used for optimizations only.
GreaterThanOrClose ( double value1, double value2 ) : bool	GreaterThanOrClose - Returns whether or not the first double is greater than or close to the second double. That is, whether or not the first is strictly greater than or within epsilon of the other number. Note that this epsilon is proportional to the numbers themselves to that AreClose survives scalar multiplication. Note, There are plenty of ways for this to return false even for numbers which are theoretically identical, so no code calling this should fail to work if this returns false. This is important enough to repeat: NB: NO CODE CALLING THIS FUNCTION SHOULD DEPEND ON ACCURATE RESULTS - this should be used for optimizations only.
IsBetweenZeroAndOne ( double val ) : bool
IsNaN ( double value ) : bool
IsOne ( double value ) : bool	IsOne - Returns whether or not the double is "close" to 1. Same as AreClose(double, 1), but this is faster.
IsZero ( double value ) : bool	IsZero - Returns whether or not the double is "close" to 0. Same as AreClose(double, 0), but this is faster.
LessThan ( double value1, double value2 ) : bool	LessThan - Returns whether or not the first double is less than the second double. That is, whether or not the first is strictly less than and not within epsilon of the other number. Note that this epsilon is proportional to the numbers themselves to that AreClose survives scalar multiplication. Note, There are plenty of ways for this to return false even for numbers which are theoretically identical, so no code calling this should fail to work if this returns false. This is important enough to repeat: NB: NO CODE CALLING THIS FUNCTION SHOULD DEPEND ON ACCURATE RESULTS - this should be used for optimizations only.
LessThanOrClose ( double value1, double value2 ) : bool	LessThanOrClose - Returns whether or not the first double is less than or close to the second double. That is, whether or not the first is strictly less than or within epsilon of the other number. Note that this epsilon is proportional to the numbers themselves to that AreClose survives scalar multiplication. Note, There are plenty of ways for this to return false even for numbers which are theoretically identical, so no code calling this should fail to work if this returns false. This is important enough to repeat: NB: NO CODE CALLING THIS FUNCTION SHOULD DEPEND ON ACCURATE RESULTS - this should be used for optimizations only.
RectHasNaN ( Rect r ) : bool	rectHasNaN - this returns true if this rect has X, Y , Height or Width as NaN.

Method Details

AreClose() public static method

Compares two points for fuzzy equality. This function helps compensate for the fact that double values can acquire error when operated upon

public static AreClose ( Point point1, Point point2 ) : bool
point1	Point	The first point to compare
point2	Point	The second point to compare
return	bool

AreClose() public static method

Compares two rectangles for fuzzy equality. This function helps compensate for the fact that double values can acquire error when operated upon

public static AreClose ( Rect rect1, Rect rect2 ) : bool
rect1	System.Windows.Rect	The first rectangle to compare
rect2	System.Windows.Rect	The second rectangle to compare
return	bool

AreClose() public static method

Compares two Size instances for fuzzy equality. This function helps compensate for the fact that double values can acquire error when operated upon

public static AreClose ( Size size1, Size size2 ) : bool
size1	System.Windows.Size	The first size to compare
size2	System.Windows.Size	The second size to compare
return	bool

AreClose() public static method

Compares two Vector instances for fuzzy equality. This function helps compensate for the fact that double values can acquire error when operated upon

public static AreClose ( System vector1, System vector2 ) : bool
vector1	System	The first Vector to compare
vector2	System	The second Vector to compare
return	bool

AreClose() public static method

AreClose - Returns whether or not two doubles are "close". That is, whether or not they are within epsilon of each other. Note that this epsilon is proportional to the numbers themselves to that AreClose survives scalar multiplication. There are plenty of ways for this to return false even for numbers which are theoretically identical, so no code calling this should fail to work if this returns false. This is important enough to repeat: NB: NO CODE CALLING THIS FUNCTION SHOULD DEPEND ON ACCURATE RESULTS - this should be used for optimizations *only*.

public static AreClose ( double value1, double value2 ) : bool
value1	double	The first double to compare.
value2	double	The second double to compare.
return	bool

DoubleToInt() public static method

public static DoubleToInt ( double val ) : int
val	double
return	int

GreaterThan() public static method

GreaterThan - Returns whether or not the first double is greater than the second double. That is, whether or not the first is strictly greater than *and* not within epsilon of the other number. Note that this epsilon is proportional to the numbers themselves to that AreClose survives scalar multiplication. Note, There are plenty of ways for this to return false even for numbers which are theoretically identical, so no code calling this should fail to work if this returns false. This is important enough to repeat: NB: NO CODE CALLING THIS FUNCTION SHOULD DEPEND ON ACCURATE RESULTS - this should be used for optimizations *only*.

public static GreaterThan ( double value1, double value2 ) : bool
value1	double	The first double to compare.
value2	double	The second double to compare.
return	bool

GreaterThanOrClose() public static method

GreaterThanOrClose - Returns whether or not the first double is greater than or close to the second double. That is, whether or not the first is strictly greater than or within epsilon of the other number. Note that this epsilon is proportional to the numbers themselves to that AreClose survives scalar multiplication. Note, There are plenty of ways for this to return false even for numbers which are theoretically identical, so no code calling this should fail to work if this returns false. This is important enough to repeat: NB: NO CODE CALLING THIS FUNCTION SHOULD DEPEND ON ACCURATE RESULTS - this should be used for optimizations *only*.

public static GreaterThanOrClose ( double value1, double value2 ) : bool
value1	double	The first double to compare.
value2	double	The second double to compare.
return	bool

IsBetweenZeroAndOne() public static method

public static IsBetweenZeroAndOne ( double val ) : bool
val	double
return	bool

IsNaN() public static method

public static IsNaN ( double value ) : bool
value	double
return	bool

IsOne() public static method

IsOne - Returns whether or not the double is "close" to 1. Same as AreClose(double, 1), but this is faster.

public static IsOne ( double value ) : bool
value	double	The double to compare to 1.
return	bool

IsZero() public static method

IsZero - Returns whether or not the double is "close" to 0. Same as AreClose(double, 0), but this is faster.

public static IsZero ( double value ) : bool
value	double	The double to compare to 0.
return	bool

LessThan() public static method

LessThan - Returns whether or not the first double is less than the second double. That is, whether or not the first is strictly less than *and* not within epsilon of the other number. Note that this epsilon is proportional to the numbers themselves to that AreClose survives scalar multiplication. Note, There are plenty of ways for this to return false even for numbers which are theoretically identical, so no code calling this should fail to work if this returns false. This is important enough to repeat: NB: NO CODE CALLING THIS FUNCTION SHOULD DEPEND ON ACCURATE RESULTS - this should be used for optimizations *only*.

public static LessThan ( double value1, double value2 ) : bool
value1	double	The first double to compare.
value2	double	The second double to compare.
return	bool

LessThanOrClose() public static method

LessThanOrClose - Returns whether or not the first double is less than or close to the second double. That is, whether or not the first is strictly less than or within epsilon of the other number. Note that this epsilon is proportional to the numbers themselves to that AreClose survives scalar multiplication. Note, There are plenty of ways for this to return false even for numbers which are theoretically identical, so no code calling this should fail to work if this returns false. This is important enough to repeat: NB: NO CODE CALLING THIS FUNCTION SHOULD DEPEND ON ACCURATE RESULTS - this should be used for optimizations *only*.

public static LessThanOrClose ( double value1, double value2 ) : bool
value1	double	The first double to compare.
value2	double	The second double to compare.
return	bool

RectHasNaN() public static method

rectHasNaN - this returns true if this rect has X, Y , Height or Width as NaN.

public static RectHasNaN ( Rect r ) : bool
r	System.Windows.Rect	The rectangle to test
return	bool