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authorLaG1924 <12997935+LaG1924@users.noreply.github.com>2017-05-12 15:49:50 +0200
committerLaG1924 <12997935+LaG1924@users.noreply.github.com>2017-05-12 15:49:50 +0200
commite62817b8252974b8a98393275874ee303840bf13 (patch)
tree4565935f06e369f4a84410b0c098958e07a750c7 /depedencies/include/glm/gtx/bit.inl
parent2017-05-10 (diff)
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Diffstat (limited to 'depedencies/include/glm/gtx/bit.inl')
-rw-r--r--depedencies/include/glm/gtx/bit.inl93
1 files changed, 93 insertions, 0 deletions
diff --git a/depedencies/include/glm/gtx/bit.inl b/depedencies/include/glm/gtx/bit.inl
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+++ b/depedencies/include/glm/gtx/bit.inl
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+/// @ref gtx_bit
+/// @file glm/gtx/bit.inl
+
+namespace glm
+{
+ ///////////////////
+ // highestBitValue
+
+ template <typename genIUType>
+ GLM_FUNC_QUALIFIER genIUType highestBitValue(genIUType Value)
+ {
+ genIUType tmp = Value;
+ genIUType result = genIUType(0);
+ while(tmp)
+ {
+ result = (tmp & (~tmp + 1)); // grab lowest bit
+ tmp &= ~result; // clear lowest bit
+ }
+ return result;
+ }
+
+ template <typename T, precision P, template <typename, precision> class vecType>
+ GLM_FUNC_QUALIFIER vecType<T, P> highestBitValue(vecType<T, P> const & v)
+ {
+ return detail::functor1<T, T, P, vecType>::call(highestBitValue, v);
+ }
+
+ ///////////////////
+ // lowestBitValue
+
+ template <typename genIUType>
+ GLM_FUNC_QUALIFIER genIUType lowestBitValue(genIUType Value)
+ {
+ return (Value & (~Value + 1));
+ }
+
+ template <typename T, precision P, template <typename, precision> class vecType>
+ GLM_FUNC_QUALIFIER vecType<T, P> lowestBitValue(vecType<T, P> const & v)
+ {
+ return detail::functor1<T, T, P, vecType>::call(lowestBitValue, v);
+ }
+
+ ///////////////////
+ // powerOfTwoAbove
+
+ template <typename genType>
+ GLM_FUNC_QUALIFIER genType powerOfTwoAbove(genType value)
+ {
+ return isPowerOfTwo(value) ? value : highestBitValue(value) << 1;
+ }
+
+ template <typename T, precision P, template <typename, precision> class vecType>
+ GLM_FUNC_QUALIFIER vecType<T, P> powerOfTwoAbove(vecType<T, P> const & v)
+ {
+ return detail::functor1<T, T, P, vecType>::call(powerOfTwoAbove, v);
+ }
+
+ ///////////////////
+ // powerOfTwoBelow
+
+ template <typename genType>
+ GLM_FUNC_QUALIFIER genType powerOfTwoBelow(genType value)
+ {
+ return isPowerOfTwo(value) ? value : highestBitValue(value);
+ }
+
+ template <typename T, precision P, template <typename, precision> class vecType>
+ GLM_FUNC_QUALIFIER vecType<T, P> powerOfTwoBelow(vecType<T, P> const & v)
+ {
+ return detail::functor1<T, T, P, vecType>::call(powerOfTwoBelow, v);
+ }
+
+ /////////////////////
+ // powerOfTwoNearest
+
+ template <typename genType>
+ GLM_FUNC_QUALIFIER genType powerOfTwoNearest(genType value)
+ {
+ if(isPowerOfTwo(value))
+ return value;
+
+ genType const prev = highestBitValue(value);
+ genType const next = prev << 1;
+ return (next - value) < (value - prev) ? next : prev;
+ }
+
+ template <typename T, precision P, template <typename, precision> class vecType>
+ GLM_FUNC_QUALIFIER vecType<T, P> powerOfTwoNearest(vecType<T, P> const & v)
+ {
+ return detail::functor1<T, T, P, vecType>::call(powerOfTwoNearest, v);
+ }
+
+}//namespace glm