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Diffstat (limited to 'src/include/glm/gtc/round.inl')
| -rw-r--r-- | src/include/glm/gtc/round.inl | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/src/include/glm/gtc/round.inl b/src/include/glm/gtc/round.inl new file mode 100644 index 0000000..a1beda5 --- /dev/null +++ b/src/include/glm/gtc/round.inl @@ -0,0 +1,155 @@ +/// @ref gtc_round
+
+#include "../integer.hpp"
+#include "../ext/vector_integer.hpp"
+
+namespace glm{
+namespace detail
+{
+ template<bool is_float, bool is_signed>
+ struct compute_roundMultiple {};
+
+ template<>
+ struct compute_roundMultiple<true, true>
+ {
+ template<typename genType>
+ GLM_FUNC_QUALIFIER static genType call(genType Source, genType Multiple)
+ {
+ if (Source >= genType(0))
+ return Source - std::fmod(Source, Multiple);
+ else
+ {
+ genType Tmp = Source + genType(1);
+ return Tmp - std::fmod(Tmp, Multiple) - Multiple;
+ }
+ }
+ };
+
+ template<>
+ struct compute_roundMultiple<false, false>
+ {
+ template<typename genType>
+ GLM_FUNC_QUALIFIER static genType call(genType Source, genType Multiple)
+ {
+ if (Source >= genType(0))
+ return Source - Source % Multiple;
+ else
+ {
+ genType Tmp = Source + genType(1);
+ return Tmp - Tmp % Multiple - Multiple;
+ }
+ }
+ };
+
+ template<>
+ struct compute_roundMultiple<false, true>
+ {
+ template<typename genType>
+ GLM_FUNC_QUALIFIER static genType call(genType Source, genType Multiple)
+ {
+ if (Source >= genType(0))
+ return Source - Source % Multiple;
+ else
+ {
+ genType Tmp = Source + genType(1);
+ return Tmp - Tmp % Multiple - Multiple;
+ }
+ }
+ };
+}//namespace detail
+
+ //////////////////
+ // ceilPowerOfTwo
+
+ template<typename genType>
+ GLM_FUNC_QUALIFIER genType ceilPowerOfTwo(genType value)
+ {
+ return detail::compute_ceilPowerOfTwo<1, genType, defaultp, std::numeric_limits<genType>::is_signed>::call(vec<1, genType, defaultp>(value)).x;
+ }
+
+ template<length_t L, typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<L, T, Q> ceilPowerOfTwo(vec<L, T, Q> const& v)
+ {
+ return detail::compute_ceilPowerOfTwo<L, T, Q, std::numeric_limits<T>::is_signed>::call(v);
+ }
+
+ ///////////////////
+ // floorPowerOfTwo
+
+ template<typename genType>
+ GLM_FUNC_QUALIFIER genType floorPowerOfTwo(genType value)
+ {
+ return isPowerOfTwo(value) ? value : static_cast<genType>(1) << findMSB(value);
+ }
+
+ template<length_t L, typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<L, T, Q> floorPowerOfTwo(vec<L, T, Q> const& v)
+ {
+ return detail::functor1<vec, L, T, T, Q>::call(floorPowerOfTwo, v);
+ }
+
+ ///////////////////
+ // roundPowerOfTwo
+
+ template<typename genIUType>
+ GLM_FUNC_QUALIFIER genIUType roundPowerOfTwo(genIUType value)
+ {
+ if(isPowerOfTwo(value))
+ return value;
+
+ genIUType const prev = static_cast<genIUType>(1) << findMSB(value);
+ genIUType const next = prev << static_cast<genIUType>(1);
+ return (next - value) < (value - prev) ? next : prev;
+ }
+
+ template<length_t L, typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<L, T, Q> roundPowerOfTwo(vec<L, T, Q> const& v)
+ {
+ return detail::functor1<vec, L, T, T, Q>::call(roundPowerOfTwo, v);
+ }
+
+ //////////////////////
+ // ceilMultiple
+
+ template<typename genType>
+ GLM_FUNC_QUALIFIER genType ceilMultiple(genType Source, genType Multiple)
+ {
+ return detail::compute_ceilMultiple<std::numeric_limits<genType>::is_iec559, std::numeric_limits<genType>::is_signed>::call(Source, Multiple);
+ }
+
+ template<length_t L, typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<L, T, Q> ceilMultiple(vec<L, T, Q> const& Source, vec<L, T, Q> const& Multiple)
+ {
+ return detail::functor2<vec, L, T, Q>::call(ceilMultiple, Source, Multiple);
+ }
+
+ //////////////////////
+ // floorMultiple
+
+ template<typename genType>
+ GLM_FUNC_QUALIFIER genType floorMultiple(genType Source, genType Multiple)
+ {
+ return detail::compute_floorMultiple<std::numeric_limits<genType>::is_iec559, std::numeric_limits<genType>::is_signed>::call(Source, Multiple);
+ }
+
+ template<length_t L, typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<L, T, Q> floorMultiple(vec<L, T, Q> const& Source, vec<L, T, Q> const& Multiple)
+ {
+ return detail::functor2<vec, L, T, Q>::call(floorMultiple, Source, Multiple);
+ }
+
+ //////////////////////
+ // roundMultiple
+
+ template<typename genType>
+ GLM_FUNC_QUALIFIER genType roundMultiple(genType Source, genType Multiple)
+ {
+ return detail::compute_roundMultiple<std::numeric_limits<genType>::is_iec559, std::numeric_limits<genType>::is_signed>::call(Source, Multiple);
+ }
+
+ template<length_t L, typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<L, T, Q> roundMultiple(vec<L, T, Q> const& Source, vec<L, T, Q> const& Multiple)
+ {
+ return detail::functor2<vec, L, T, Q>::call(roundMultiple, Source, Multiple);
+ }
+}//namespace glm
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