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Allow HMM_PowerF to try and compute negative bases

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This commit is contained in:
Matt Mascarenhas
2016-08-31 03:16:13 +01:00
parent fcc3052ed4
commit 7e42f3d7c8
2 changed files with 1 additions and 10 deletions
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9
HandmadeMath.h
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@@ -680,14 +680,7 @@ HMM_Power(float Base, int Exponent)
HINLINE float HINLINE float
HMM_PowerF(float Base, float Exponent) HMM_PowerF(float Base, float Exponent)
{ {
if (Base > 0) return expf(Exponent * logf(Base));
{
return expf(Exponent * logf(Base));
}
else
{
return -expf(Exponent * logf(-Base));
}
} }
HINLINE float HINLINE float

2
test/hmm_test.cpp
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@@ -61,9 +61,7 @@ TEST(ScalarMath, PowerF)
{ {
EXPECT_FLOAT_EQ(HMM_PowerF(2.0f, 0), 1.0f); EXPECT_FLOAT_EQ(HMM_PowerF(2.0f, 0), 1.0f);
EXPECT_NEAR(HMM_PowerF(2.0f, 4.1), 17.148376f, 0.0001f); EXPECT_NEAR(HMM_PowerF(2.0f, 4.1), 17.148376f, 0.0001f);
EXPECT_NEAR(HMM_PowerF(-2.0f, 4.1), -17.148376f, 0.0001f);
EXPECT_NEAR(HMM_PowerF(2.0f, -2.5), 0.176777f, 0.0001f); EXPECT_NEAR(HMM_PowerF(2.0f, -2.5), 0.176777f, 0.0001f);
EXPECT_NEAR(HMM_PowerF(-2.0f, -2.5), -0.176777f, 0.0001f);
} }
TEST(ScalarMath, Lerp) TEST(ScalarMath, Lerp)