nv Namespace Reference

Classes
struct	Equal
struct	hash
struct	hash< int >
struct	hash< Uint32 >
struct	Weld

Functions
Uint32	nextPowerOfTwo (Uint32 x)
bool	isPowerOfTwo (Uint32 n)
	Return true if n is a power of two.

Function Documentation

isPowerOfTwo()

bool nv::isPowerOfTwo ( Uint32  n )

inline

Return true if n is a power of two.

nextPowerOfTwo()

Uint32 nv::nextPowerOfTwo ( Uint32  x )

inline

Return the next power of two.

See also

http://graphics.stanford.edu/~seander/bithacks.html

Warning

Behaviour for 0 is undefined.

Note

isPowerOfTwo(x) == true -> nextPowerOfTwo(x) == x

nextPowerOfTwo(x) = 2 << log2(x-1)