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java.lang.Object | +--net.rim.device.api.util.MathUtilities
Provides some basic numeric operations.
| Method Summary | ||
static double |
acos(double x)
Return the arc cosine of the value x. |
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static double |
asin(double x)
Return the arc sine of the value x. |
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static double |
atan(double x)
Return the arc tangent of the value x. |
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static double |
atan2(double y,
double x)
Converts rectangular coordinates (x,y) to polar coordinates (r,theta). |
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static int |
clamp(int low,
int value,
int high)
Clamps provided value between a lower and upper bound. |
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static double |
exp(double x)
Return the exponential (base e) of x. |
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static double |
ldexp(double x,
int exp)
Returns the result of multiplying x (the significand) by 2 raised to the power of exp (the exponent). |
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static double |
log(double x)
Return the natural logarithm (base e) of x. |
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static int |
log2(int value)
Returns the log base 2 of the unsigned value rounded down. |
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static int |
log2(long value)
Returns the log base 2 of the unsigned value rounded down. |
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static double |
pow(double x,
double y)
Return x raised to the power of y. |
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static long |
round(double a)
Returns the closest long to the argument. |
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static int |
round(float a)
Returns the closest int to the argument. |
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static int |
wrap(int low,
int value,
int high)
Wraps provided value around a lower and upper bound. |
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| Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Method Detail |
public static double acos(double x)
x.x - the value.public static double asin(double x)
x.x - the value.public static double atan(double x)
x.x - the value.
public static double atan2(double y,
double x)
y - the abscissa coordinate.x - the ordinate coordinate.
public static int clamp(int low,
int value,
int high)
Note: This method only produces sensible results if the lower bound is less than, or equal to, the higher bound.
low - Lower bound value.value - Value to clamp.high - Upper bound value.public static double exp(double x)
x - the power to raise e to.
public static double ldexp(double x,
int exp)
x (the significand) by 2 raised to the power of exp (the exponent).x - the significand.exp - the exponent.public static double log(double x)
x - a number greater than zero.public static int log2(int value)
The value zero and one both return zero.
value - The unsigned value to calculate log2 on.public static int log2(long value)
The value zero and one both return a log2 result of zero.
value - The unsigned value to calculate log2 on.
public static double pow(double x,
double y)
x raised to the power of y.x - the base value.y - the exponent.public static long round(double a)
long to the argument. The result
is rounded to an integer by adding 1/2 if positive or
subtracting 1/2 if negative, taking the floor of the
result, and casting the result to type long.
Special cases:
Long.MIN_VALUE, the result is
equal to the value of Long.MIN_VALUE.
Long.MAX_VALUE, the result is
equal to the value of Long.MAX_VALUE.
a - a floating-point value to be rounded to a
long.long value.Long.MAX_VALUE,
Long.MIN_VALUEpublic static int round(float a)
int to the argument. The
result is rounded to an integer by adding 1/2 if positive or
subtracting 1/2 if negative, taking the floor of the
result, and casting the result to type int.
Special cases:
Integer.MIN_VALUE, the result is
equal to the value of Integer.MIN_VALUE.
Integer.MAX_VALUE, the result is
equal to the value of Integer.MAX_VALUE.
a - a floating-point value to be rounded to an integer.int value.Integer.MAX_VALUE,
Integer.MIN_VALUE
public static int wrap(int low,
int value,
int high)
Note: This method only produces sensible results if the lower bound is less than, or equal to, the higher bound.
low - Lower bound value.value - Value to wrap.high - Upper bound value.
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