151 lines
5.6 KiB
C++
151 lines
5.6 KiB
C++
// Copyright (C) 2012 Rémi Bèges
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// This file is part of the "Nazara Engine".
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#include <Nazara/Core/Error.hpp>
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#include <Nazara/Noise/Config.hpp>
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#include <Nazara/Noise/Debug.hpp>
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template <typename T>
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NzPerlin4D<T>::NzPerlin4D()
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{
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int grad4Temp[][4] =
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{
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{0,1,1,1}, {0,1,1,-1}, {0,1,-1,1}, {0,1,-1,-1},
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{0,-1,1,1},{0,-1,1,-1},{0,-1,-1,1},{0,-1,-1,-1},
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{1,0,1,1}, {1,0,1,-1}, {1,0,-1,1}, {1,0,-1,-1},
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{-1,0,1,1},{-1,0,1,-1},{-1,0,-1,1},{-1,0,-1,-1},
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{1,1,0,1}, {1,1,0,-1}, {1,-1,0,1}, {1,-1,0,-1},
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{-1,1,0,1},{-1,1,0,-1},{-1,-1,0,1},{-1,-1,0,-1},
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{1,1,1,0}, {1,1,-1,0}, {1,-1,1,0}, {1,-1,-1,0},
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{-1,1,1,0},{-1,1,-1,0},{-1,-1,1,0},{-1,-1,-1,0}
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};
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for(int i(0) ; i < 32 ; ++i)
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for(int j(0) ; j < 4 ; ++j)
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gradient4[i][j] = grad4Temp[i][j];
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}
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template <typename T>
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T NzPerlin4D<T>::GetValue(T x, T y, T z, T w, T res)
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{
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nx = x/res;
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ny = y/res;
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nz = z/res;
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nw = w/res;
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x0 = fastfloor(nx);
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y0 = fastfloor(ny);
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z0 = fastfloor(nz);
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w0 = fastfloor(nw);
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ii = x0 & 255;
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jj = y0 & 255;
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kk = z0 & 255;
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ll = w0 & 255;
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gi0 = perm[ii + perm[jj + perm[kk + perm[ll ]]]] & 31;
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gi1 = perm[ii + 1 + perm[jj + perm[kk + perm[ll ]]]] & 31;
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gi2 = perm[ii + perm[jj + 1 + perm[kk + perm[ll ]]]] & 31;
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gi3 = perm[ii + 1 + perm[jj + 1 + perm[kk + perm[ll ]]]] & 31;
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gi4 = perm[ii + perm[jj + + perm[kk + 1 + perm[ll ]]]] & 31;
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gi5 = perm[ii + 1 + perm[jj + + perm[kk + 1 + perm[ll ]]]] & 31;
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gi6 = perm[ii + perm[jj + 1 + perm[kk + 1 + perm[ll ]]]] & 31;
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gi7 = perm[ii + 1 + perm[jj + 1 + perm[kk + 1 + perm[ll ]]]] & 31;
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gi8 = perm[ii + perm[jj + perm[kk + perm[ll + 1]]]] & 31;
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gi9 = perm[ii + 1 + perm[jj + perm[kk + perm[ll + 1]]]] & 31;
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gi10 = perm[ii + perm[jj + 1 + perm[kk + perm[ll + 1]]]] & 31;
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gi11 = perm[ii + 1 + perm[jj + 1 + perm[kk + perm[ll + 1]]]] & 31;
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gi12 = perm[ii + perm[jj + perm[kk + 1 + perm[ll + 1]]]] & 31;
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gi13 = perm[ii + 1 + perm[jj + perm[kk + 1 + perm[ll + 1]]]] & 31;
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gi14 = perm[ii + perm[jj + 1 + perm[kk + 1 + perm[ll + 1]]]] & 31;
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gi15 = perm[ii + 1 + perm[jj + 1 + perm[kk + 1 + perm[ll + 1]]]] & 31;
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temp.x = nx-x0;
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temp.y = ny-y0;
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temp.z = nz-z0;
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temp.w = nw-w0;
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Cx = temp.x * temp.x * temp.x * (temp.x * (temp.x * 6 - 15) + 10);
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Cy = temp.y * temp.y * temp.y * (temp.y * (temp.y * 6 - 15) + 10);
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Cz = temp.z * temp.z * temp.z * (temp.z * (temp.z * 6 - 15) + 10);
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Cw = temp.w * temp.w * temp.w * (temp.w * (temp.w * 6 - 15) + 10);
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s[0] = gradient4[gi0][0]*temp.x + gradient4[gi0][1]*temp.y + gradient4[gi0][2]*temp.z + gradient4[gi0][3]*temp.w;
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temp.x = nx-(x0+1);
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t[0] = gradient4[gi1][0]*temp.x + gradient4[gi1][1]*temp.y + gradient4[gi1][2]*temp.z + gradient4[gi1][3]*temp.w;
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temp.y = ny-(y0+1);
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v[0] = gradient4[gi3][0]*temp.x + gradient4[gi3][1]*temp.y + gradient4[gi3][2]*temp.z + gradient4[gi3][3]*temp.w;
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temp.x = nx-x0;
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u[0] = gradient4[gi2][0]*temp.x + gradient4[gi2][1]*temp.y + gradient4[gi2][2]*temp.z + gradient4[gi2][3]*temp.w;
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temp.y = ny-y0;
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temp.z = nz-(z0+1);
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s[1] = gradient4[gi4][0]*temp.x + gradient4[gi4][1]*temp.y + gradient4[gi4][2]*temp.z + gradient4[gi4][3]*temp.w;
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temp.x = nx-(x0+1);
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t[1] = gradient4[gi5][0]*temp.x + gradient4[gi5][1]*temp.y + gradient4[gi5][2]*temp.z + gradient4[gi5][3]*temp.w;
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temp.y = ny-(y0+1);
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v[1] = gradient4[gi7][0]*temp.x + gradient4[gi7][1]*temp.y + gradient4[gi7][2]*temp.z + gradient4[gi7][3]*temp.w;
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temp.x = nx-x0;
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u[1] = gradient4[gi6][0]*temp.x + gradient4[gi6][1]*temp.y + gradient4[gi6][2]*temp.z + gradient4[gi6][3]*temp.w;
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temp.y = ny-y0;
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temp.z = nz-z0;
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temp.w = nw-(w0+1);
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s[2] = gradient4[gi8][0]*temp.x + gradient4[gi8][1]*temp.y + gradient4[gi8][2]*temp.z + gradient4[gi8][3]*temp.w;
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temp.x = nx-(x0+1);
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t[2] = gradient4[gi9][0]*temp.x + gradient4[gi9][1]*temp.y + gradient4[gi9][2]*temp.z + gradient4[gi9][3]*temp.w;
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temp.y = ny-(y0+1);
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v[2] = gradient4[gi11][0]*temp.x + gradient4[gi11][1]*temp.y + gradient4[gi11][2]*temp.z + gradient4[gi11][3]*temp.w;
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temp.x = nx-x0;
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u[2] = gradient4[gi10][0]*temp.x + gradient4[gi10][1]*temp.y + gradient4[gi10][2]*temp.z + gradient4[gi10][3]*temp.w;
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temp.y = ny-y0;
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temp.z = nz-(z0+1);
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s[3] = gradient4[gi12][0]*temp.x + gradient4[gi12][1]*temp.y + gradient4[gi12][2]*temp.z + gradient4[gi12][3]*temp.w;
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temp.x = nx-(x0+1);
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t[3] = gradient4[gi13][0]*temp.x + gradient4[gi13][1]*temp.y + gradient4[gi13][2]*temp.z + gradient4[gi13][3]*temp.w;
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temp.y = ny-(y0+1);
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v[3] = gradient4[gi15][0]*temp.x + gradient4[gi15][1]*temp.y + gradient4[gi15][2]*temp.z + gradient4[gi15][3]*temp.w;
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temp.x = nx-x0;
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u[3] = gradient4[gi14][0]*temp.x + gradient4[gi14][1]*temp.y + gradient4[gi14][2]*temp.z + gradient4[gi14][3]*temp.w;
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Li1 = s[0] + Cx*(t[0]-s[0]);
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Li2 = u[0] + Cx*(v[0]-u[0]);
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Li3 = s[1] + Cx*(t[1]-s[1]);
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Li4 = u[1] + Cx*(v[1]-u[1]);
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Li5 = s[2] + Cx*(t[2]-s[2]);
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Li6 = u[2] + Cx*(v[2]-u[2]);
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Li7 = s[3] + Cx*(t[3]-s[3]);
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Li8 = u[3] + Cx*(v[3]-u[3]);
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Li9 = Li1 + Cy*(Li2-Li1);
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Li10 = Li3 + Cy*(Li4-Li3);
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Li11 = Li5 + Cy*(Li6-Li5);
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Li12 = Li7 + Cy*(Li8-Li7);
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Li13 = Li9 + Cz*(Li10-Li9);
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Li14 = Li11 + Cz*(Li12-Li11);
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return Li13 + Cw*(Li14-Li13);
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}
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#include <Nazara/Core/DebugOff.hpp>
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