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change implementation of square root

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MPC 2018-12-20 17:37:06 -03:00
parent 70ce880248
commit 8d42a47fdd
1 changed files with 4 additions and 1 deletions
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5
src/m_fixed.c
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@ -125,7 +125,10 @@ fixed_t FixedEuclidean(fixed_t x2, fixed_t y2, fixed_t x1, fixed_t y1)
{
INT64 dx = x2-x1;
INT64 dy = y2-y1;
return (fixed_t)llrint(sqrt(dx*dx+dy*dy));
union {INT64 i; float x;} u;
u.x = (dx*dx+dy*dy);
u.i = (1<<29) + (u.i >> 1) - (1<<22);
return (fixed_t)llrintf(u.x);
}
vector2_t *FV2_Load(vector2_t *vec, fixed_t x, fixed_t y)