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3d perlin noise was not generating proper results.

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Shyotl
2015-06-01 16:36:35 -05:00
parent a7ba5145cc
commit c965df0901
1 changed files with 2 additions and 2 deletions
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4
indra/llmath/llperlin.h
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@@ -91,7 +91,7 @@ public:
D = lerp(A, B, s[VY]); D = lerp(A, B, s[VY]);
return lerp(C, D, s[VZ]); return lerp(C, D, s[VZ]) * 0.77f;
} }
template <typename T> template <typename T>
static F32 turbulence(const T& vec, F32 freq, U32 wrap_at = 256) static F32 turbulence(const T& vec, F32 freq, U32 wrap_at = 256)
@@ -159,7 +159,7 @@ private:
const U32 limit = llclamp(wrap_at, U32(1), U32(256)); const U32 limit = llclamp(wrap_at, U32(1), U32(256));
for (U32 i = 0; i < N; ++i) for (U32 i = 0; i < N; ++i)
{ {
const S32 t_S32 = lltrunc(vec[i]); const S32 t_S32 = llfloor(vec[i]);
b[i][0] = (t_S32) % limit; b[i][0] = (t_S32) % limit;
b[i][1] = (t_S32 + 1) % limit; b[i][1] = (t_S32 + 1) % limit;
r[i][0] = vec[i] - F32(t_S32); r[i][0] = vec[i] - F32(t_S32);