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Fixes hash float negative 0 problem

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Before this was giving an error:

var a = {Vector2(1, 0): 5, Vector2(-1, 0): 7}
    print(a)
    print(a[Vector2(1, 0)])
    print(a[-Vector2(1, 0)])

This simple commit fixes the issue.
This commit is contained in:
Răzvan Cosmin Rădulescu 2016-10-04 10:57:16 +02:00
parent 12843167ca
commit 9ad0850301
1 changed files with 4 additions and 1 deletions
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5
core/hashfuncs.h
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@ -74,7 +74,10 @@ static inline uint32_t hash_djb2_one_float(float p_in,uint32_t p_prev=5381) {
float f;
uint32_t i;
} u;
u.f=p_in;
// handle -0 case
if (p_in==0.0f) u.f=0.0f;
else u.f=p_in;
return ((p_prev<<5)+p_prev)+u.i;
}