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Test the squared length of a vector before normalizing

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Chris Robinson 2012-06-28 20:54:10 -07:00
parent 1c096b101d
commit 524c88c402
1 changed files with 6 additions and 8 deletions
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14
OpenAL32/Include/alu.h
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@ -281,15 +281,13 @@ static __inline ALfloat aluDotproduct(const ALfloat *inVector1, const ALfloat *i
static __inline void aluNormalize(ALfloat *inVector)
{
ALfloat length, inverse_length;
length = aluSqrt(aluDotproduct(inVector, inVector));
if(length > 0.0f)
ALfloat lengthsqr = aluDotproduct(inVector, inVector);
if(lengthsqr > 0.0f)
{
inverse_length = 1.0f/length;
inVector[0] *= inverse_length;
inVector[1] *= inverse_length;
inVector[2] *= inverse_length;
ALfloat inv_length = 1.0f/aluSqrt(lengthsqr);
inVector[0] *= inv_length;
inVector[1] *= inv_length;
inVector[2] *= inv_length;
}
}