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Perlin 2,3,4 optimisations + Simplex imp fixed + improved architecture

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This commit is contained in:
Remi Beges
2012-06-05 22:00:09 +02:00
parent 4d975fa67e
commit 5d7f8acbc8
14 changed files with 307 additions and 317 deletions
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78
include/Nazara/Noise/Perlin3D.inl
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@@ -24,78 +24,68 @@ NzPerlin3D<T>::NzPerlin3D()
template <typename T>
T NzPerlin3D<T>::GetValue(T x, T y, T z, T res)
{
nx = x/res;
ny = y/res;
nz = z/res;
x /= res;
y /= res;
z /= res;
x0 = static_cast<int>(nx);
y0 = static_cast<int>(ny);
z0 = static_cast<int>(nz);
x0 = fastfloor(x);
y0 = fastfloor(y);
z0 = fastfloor(z);
ii = x0 & 255;
jj = y0 & 255;
kk = z0 & 255;
gi0 = perm[ii + perm[jj + perm[kk]]] % 16;
gi1 = perm[ii + 1 + perm[jj + perm[kk]]] % 16;
gi2 = perm[ii + perm[jj + 1 + perm[kk]]] % 16;
gi3 = perm[ii + 1 + perm[jj + 1 + perm[kk]]] % 16;
gi0 = perm[ii + perm[jj + perm[kk]]] & 15;
gi1 = perm[ii + 1 + perm[jj + perm[kk]]] & 15;
gi2 = perm[ii + perm[jj + 1 + perm[kk]]] & 15;
gi3 = perm[ii + 1 + perm[jj + 1 + perm[kk]]] & 15;
gi4 = perm[ii + perm[jj + perm[kk + 1]]] % 16;
gi5 = perm[ii + 1 + perm[jj + perm[kk + 1]]] % 16;
gi6 = perm[ii + perm[jj + 1 + perm[kk + 1]]] % 16;
gi7 = perm[ii + 1 + perm[jj + 1 + perm[kk + 1]]] % 16;
gi4 = perm[ii + perm[jj + perm[kk + 1]]] & 15;
gi5 = perm[ii + 1 + perm[jj + perm[kk + 1]]] & 15;
gi6 = perm[ii + perm[jj + 1 + perm[kk + 1]]] & 15;
gi7 = perm[ii + 1 + perm[jj + 1 + perm[kk + 1]]] & 15;
temp.x = x-x0;
temp.y = y-y0;
temp.z = z-z0;
Cx = temp.x * temp.x * temp.x * (temp.x * (temp.x * 6 - 15) + 10);
Cy = temp.y * temp.y * temp.y * (temp.y * (temp.y * 6 - 15) + 10);
Cz = temp.z * temp.z * temp.z * (temp.z * (temp.z * 6 - 15) + 10);
temp.x = nx-x0;
temp.y = ny-y0;
temp.z = nz-z0;
s[0] = gradient3[gi0][0]*temp.x + gradient3[gi0][1]*temp.y + gradient3[gi0][2]*temp.z;
temp.x = nx-(x0+1);
temp.y = ny-y0;
temp.x = x-(x0+1);
t[0] = gradient3[gi1][0]*temp.x + gradient3[gi1][1]*temp.y + gradient3[gi1][2]*temp.z;
temp.x = nx-x0;
temp.y = ny-(y0+1);
u[0] = gradient3[gi2][0]*temp.x + gradient3[gi2][1]*temp.y + gradient3[gi2][2]*temp.z;
temp.x = nx-(x0+1);
temp.y = ny-(y0+1);
temp.y = y-(y0+1);
v[0] = gradient3[gi3][0]*temp.x + gradient3[gi3][1]*temp.y + gradient3[gi3][2]*temp.z;
temp.x = nx-x0;
temp.y = ny-y0;
temp.z = nz-(z0+1);
temp.x = x-x0;
u[0] = gradient3[gi2][0]*temp.x + gradient3[gi2][1]*temp.y + gradient3[gi2][2]*temp.z;
temp.x = x-x0;
temp.y = y-y0;
temp.z = z-(z0+1);
s[1] = gradient3[gi4][0]*temp.x + gradient3[gi4][1]*temp.y + gradient3[gi4][2]*temp.z;
temp.x = nx-(x0+1);
temp.y = ny-y0;
temp.x = x-(x0+1);
t[1] = gradient3[gi5][0]*temp.x + gradient3[gi5][1]*temp.y + gradient3[gi5][2]*temp.z;
temp.x = nx-x0;
temp.y = ny-(y0+1);
u[1] = gradient3[gi6][0]*temp.x + gradient3[gi6][1]*temp.y + gradient3[gi6][2]*temp.z;
temp.x = nx-(x0+1);
temp.y = ny-(y0+1);
temp.y = y-(y0+1);
v[1] = gradient3[gi7][0]*temp.x + gradient3[gi7][1]*temp.y + gradient3[gi7][2]*temp.z;
tmp = nx-x0;
Cx = tmp * tmp * tmp * (tmp * (tmp * 6 - 15) + 10);
temp.x = x-x0;
u[1] = gradient3[gi6][0]*temp.x + gradient3[gi6][1]*temp.y + gradient3[gi6][2]*temp.z;
Li1 = s[0] + Cx*(t[0]-s[0]);
Li2 = u[0] + Cx*(v[0]-u[0]);
Li3 = s[1] + Cx*(t[1]-s[1]);
Li4 = u[1] + Cx*(v[1]-u[1]);
tmp = ny-y0;
Cy = tmp * tmp * tmp * (tmp * (tmp * 6 - 15) + 10);
Li5 = Li1 + Cy*(Li2-Li1);
Li6 = Li3 + Cy*(Li4-Li3);
tmp = nz-z0;
Cz = tmp * tmp * tmp * (tmp * (tmp * 6 - 15) + 10);
return Li5 + Cz*(Li6-Li5);
}