Add TooFar to util.hh

This commit is contained in:
Eryn Wells 2014-08-10 10:49:45 -07:00
parent 990d2b4c11
commit 30d0570010
2 changed files with 8 additions and 48 deletions

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@ -15,56 +15,9 @@
#include "basics/matrix.hh"
#include "basics/ray.hh"
#include "basics/types.hh"
#include "basics/util.hh"
#include "basics/vector.hh"
/**
* A very small constant. If a value is between EPSILON and 0.0, it is
* considered to be zero.
*/
const Double EPSILON = 1.0e-10;
/**
* The maximum distance a ray can travel. This is the maximum value t can be.
*/
const Double MAX_DISTANCE = 1.0e7;
/**
* Determine if the value is "close enough" to zero. Takes the absolute value
* and compares it to `EPSILON`.
*
* @see EPSILON
*
* @param [in] value The value to check
* @returns `true` if the value is close enough to zero
*/
template <typename T>
inline bool
NearZero(const T value)
{
return std::fabs(value) < EPSILON;
}
/**
* Determine if two values are "close enough" to be considered equal. Subtracts
* one from the other and checks if the result is near zero.
*
* @see NearZero
*
* @param [in] left The left parameter
* @param [in] right The right parameter
* @returns `true` if the values are close enough to be equal
*/
template <typename T>
inline bool
NearlyEqual(const T left,
const T right)
{
return NearZero(left - right);
}
inline bool
TooFar(const Double& value)
{

View file

@ -57,5 +57,12 @@ NearlyEqual(T left,
return NearZero(left - right);
}
inline bool
TooFar(const Double& value)
{
return value > MAX_DISTANCE;
}
#endif /* __BASICS_UTIL_HH__ */