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Suppressed perlin1d, added perlin 2,3,4 and simplex 2 classes + minor

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fixes/optimisations on noisemachine
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Remi Beges
2012-05-30 19:30:51 +02:00
parent 57d9af6b56
commit 784787cd79
8 changed files with 584 additions and 0 deletions
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include/Nazara/Noise/Perlin3D.inl Normal file
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// Copyright (C) 2012 Rémi Bèges
// This file is part of the "Nazara Engine".
// For conditions of distribution and use, see copyright notice in Config.hpp
#include <Nazara/Noise/Error.hpp>
#include <Nazara/Noise/Config.hpp>
#include <Nazara/Noise/Debug.hpp>
template <typename T>
NzPerlin3D<T>::NzPerlin3D()
{
int grad3Temp[][3] = {
{1,1,0},{-1,1,0},{1,-1,0},{-1,-1,0},
{1,0,1},{-1,0,1},{1,0,-1},{-1,0,-1},
{0,1,1},{0,-1,1},{0,1,-1},{0,-1,-1},
{1,1,0},{-1,1,0},{0,-1,1},{0,-1,-1}
};
for(int i(0) ; i < 16 ; ++i)
for(int j(0) ; j < 3 ; ++j)
gradient3[i][j] = grad3Temp[i][j];
}
template <typename T>
T NzPerlin3D<T>::GetValue(T x, T y, T z, T res)
{
nx = x/res;
ny = y/res;
nz = z/res;
x0 = static_cast<int>(nx);
y0 = static_cast<int>(ny);
z0 = static_cast<int>(nz);
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;
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;
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;
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);
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);
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;
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);
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);
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);
}