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AK: Add mix

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Jelle Raaijmakers 2022-01-04 15:01:25 +01:00 • committed by Linus Groh
parent 10efbfb09e
commit 8da0925d6d
2 changed files with 21 additions and 0 deletions
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7
AK/StdLibExtras.h
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@ -91,6 +91,12 @@ constexpr T clamp(const T& value, const IdentityType<T>& min, const IdentityType
return value; return value;
} }
template<typename T, typename U>
constexpr T mix(T const& v1, T const& v2, U const& interpolation)
{
return v1 + (v2 - v1) * interpolation;
}
template<typename T, typename U> template<typename T, typename U>
constexpr T ceil_div(T a, U b) constexpr T ceil_div(T a, U b)
{ {
@ -167,6 +173,7 @@ using AK::exchange;
using AK::is_constant_evaluated; using AK::is_constant_evaluated;
using AK::max; using AK::max;
using AK::min; using AK::min;
using AK::mix;
using AK::RawPtr; using AK::RawPtr;
using AK::swap; using AK::swap;
using AK::to_underlying; using AK::to_underlying;

14
Tests/AK/TestStdLibExtras.cpp
View file

@ -12,6 +12,20 @@
#include <AK/Variant.h> #include <AK/Variant.h>
#include <AK/Vector.h> #include <AK/Vector.h>
TEST_CASE(mix)
{
double a = 1.0;
double b = 3.0;
EXPECT_APPROXIMATE(mix(a, b, 0.0), 1.0);
EXPECT_APPROXIMATE(mix(a, b, 0.5), 2.0);
EXPECT_APPROXIMATE(mix(a, b, 1.0), 3.0);
EXPECT_APPROXIMATE(mix(b, a, 0.0), 3.0);
EXPECT_APPROXIMATE(mix(b, a, 0.5), 2.0);
EXPECT_APPROXIMATE(mix(b, a, 1.0), 1.0);
}
TEST_CASE(swap) TEST_CASE(swap)
{ {
int i = 4; int i = 4;