Miscellaneous Functions
[Base]

Functions
template<class VecPntT>
UInt32	osg::getMaxIndexAbs3 (const VecPntT &v)
Int32	osg::putenv (Char8 *string)
void	osg::osgsleep (UInt32 millisecs)
Real32	osg::osgrand (void)
bool	osg::osgIsBigEndian (void)

---

Detailed Description

ToDo

---

Function Documentation

template<class VecPntT>

UInt32 osg::getMaxIndexAbs3

(

const VecPntT &

v

)

[inline]

find the index that has the largest absolute value for a vec3/pnt3

Definition at line 1298 of file OSGBaseFunctions.inl.

References osg::osgabs().

Referenced by osg::Plane::transform().

{
    return 
        osgabs(v[0]) > osgabs(v[1]) ?
            (osgabs(v[0]) > osgabs(v[2]) ? 0 : 2) : 
            (osgabs(v[1]) > osgabs(v[2]) ? 1 : 2);
}

Int32 osg::putenv

(

Char8 *

string

)

[inline]

Definition at line 1311 of file OSGBaseFunctions.inl.

{
#if !defined(WIN32) || defined(BCC)
    return ::putenv(string);
#else
    return ::_putenv(string);
#endif
}

void osg::osgsleep

(

UInt32

millisecs

)

[inline]

Definition at line 1326 of file OSGBaseFunctions.inl.

Referenced by osg::getTimeStampFreq(), and osg::SceneFileHandler::readProgress().

{
#ifdef WIN32
    Sleep(millisecs);
#else

#if 0 // replaced by nanosleep to work around IRIX problems
    // Rough aproximation, have to find a better way soon (GV)

    if( (millisecs * 1000) > 1000000)
    {
        ::sleep(millisecs / 1000);
    }
    else
    {
        ::usleep(millisecs * 1000);
    }
    
#else

    struct timespec req;
    int ns;
    
    req.tv_sec = static_cast<long>(millisecs / 1000);
    req.tv_nsec = static_cast<long>((millisecs % 1000) * 1000);
    
    while((req.tv_sec > 0 || req.tv_nsec > 0) &&
          (ns = nanosleep(&req, &req)) < 0)
    {
        if(ns < 0 && errno != EINTR)
        {
            break;
        }
    }
        
#endif
#endif
}

Real32 osg::osgrand

(

void

)

[inline]

get a random value between 0 and 1

Definition at line 1371 of file OSGBaseFunctions.inl.

{
    return rand() / (Real32) RAND_MAX;
}

bool osg::osgIsBigEndian

(

void

)

[inline]

return true if the current system is big endian

Definition at line 1381 of file OSGBaseFunctions.inl.

References BIG_ENDIAN, and BYTE_ORDER.

Referenced by ImageOpen().

{
    return (BYTE_ORDER) == (BIG_ENDIAN);   
}