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Former-commit-id: b459cfe0c83f651cc660d42f7d3014c3b146f345
This commit is contained in:
Lynix
2015-09-24 00:55:57 +02:00
parent ce3bbf6c78
commit dea3fb4e39
87 changed files with 1206 additions and 1205 deletions
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110
src/Nazara/Noise/Simplex2D.cpp
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@@ -9,83 +9,83 @@
NzSimplex2D::NzSimplex2D()
{
float grad2Temp[][2] = {{1,1},{-1,1},{1,-1},{-1,-1},
{1,0},{-1,0},{0,1},{0,-1}};
float grad2Temp[][2] = {{1,1},{-1,1},{1,-1},{-1,-1},
{1,0},{-1,0},{0,1},{0,-1}};
for(int i(0) ; i < 8 ; ++i)
for(int j(0) ; j < 2 ; ++j)
gradient2[i][j] = grad2Temp[i][j];
for(int i(0) ; i < 8 ; ++i)
for(int j(0) ; j < 2 ; ++j)
gradient2[i][j] = grad2Temp[i][j];
SkewCoeff2D = 0.5f*(std::sqrt(3.f) - 1.f);
UnskewCoeff2D = (3.f-std::sqrt(3.f))/6.f;
SkewCoeff2D = 0.5f*(std::sqrt(3.f) - 1.f);
UnskewCoeff2D = (3.f-std::sqrt(3.f))/6.f;
}
NzSimplex2D::NzSimplex2D(unsigned int seed) : NzSimplex2D()
{
this->SetNewSeed(seed);
this->ShufflePermutationTable();
this->SetNewSeed(seed);
this->ShufflePermutationTable();
}
float NzSimplex2D::GetValue(float x, float y, float resolution)
{
x *= resolution;
y *= resolution;
x *= resolution;
y *= resolution;
sum = (x + y) * SkewCoeff2D;
skewedCubeOrigin.x = fastfloor(x + sum);
skewedCubeOrigin.y = fastfloor(y + sum);
sum = (x + y) * SkewCoeff2D;
skewedCubeOrigin.x = fastfloor(x + sum);
skewedCubeOrigin.y = fastfloor(y + sum);
sum = (skewedCubeOrigin.x + skewedCubeOrigin.y) * UnskewCoeff2D;
unskewedCubeOrigin.x = skewedCubeOrigin.x - sum;
unskewedCubeOrigin.y = skewedCubeOrigin.y - sum;
sum = (skewedCubeOrigin.x + skewedCubeOrigin.y) * UnskewCoeff2D;
unskewedCubeOrigin.x = skewedCubeOrigin.x - sum;
unskewedCubeOrigin.y = skewedCubeOrigin.y - sum;
unskewedDistToOrigin.x = x - unskewedCubeOrigin.x;
unskewedDistToOrigin.y = y - unskewedCubeOrigin.y;
unskewedDistToOrigin.x = x - unskewedCubeOrigin.x;
unskewedDistToOrigin.y = y - unskewedCubeOrigin.y;
if(unskewedDistToOrigin.x > unskewedDistToOrigin.y)
{
off1.x = 1;
off1.y = 0;
}
else
{
off1.x = 0;
off1.y = 1;
}
if(unskewedDistToOrigin.x > unskewedDistToOrigin.y)
{
off1.x = 1;
off1.y = 0;
}
else
{
off1.x = 0;
off1.y = 1;
}
d1 = - unskewedDistToOrigin;
d1 = - unskewedDistToOrigin;
d2.x = d1.x + off1.x - UnskewCoeff2D;
d2.y = d1.y + off1.y - UnskewCoeff2D;
d2.x = d1.x + off1.x - UnskewCoeff2D;
d2.y = d1.y + off1.y - UnskewCoeff2D;
d3.x = d1.x + 1.f - 2.f * UnskewCoeff2D;
d3.y = d1.y + 1.f - 2.f * UnskewCoeff2D;
d3.x = d1.x + 1.f - 2.f * UnskewCoeff2D;
d3.y = d1.y + 1.f - 2.f * UnskewCoeff2D;
ii = skewedCubeOrigin.x & 255;
jj = skewedCubeOrigin.y & 255;
ii = skewedCubeOrigin.x & 255;
jj = skewedCubeOrigin.y & 255;
gi0 = perm[ii + perm[jj ]] & 7;
gi1 = perm[ii + off1.x + perm[jj + off1.y]] & 7;
gi2 = perm[ii + 1 + perm[jj + 1 ]] & 7;
gi0 = perm[ii + perm[jj ]] & 7;
gi1 = perm[ii + off1.x + perm[jj + off1.y]] & 7;
gi2 = perm[ii + 1 + perm[jj + 1 ]] & 7;
c1 = 0.5f - d1.x * d1.x - d1.y * d1.y;
c2 = 0.5f - d2.x * d2.x - d2.y * d2.y;
c3 = 0.5f - d3.x * d3.x - d3.y * d3.y;
c1 = 0.5f - d1.x * d1.x - d1.y * d1.y;
c2 = 0.5f - d2.x * d2.x - d2.y * d2.y;
c3 = 0.5f - d3.x * d3.x - d3.y * d3.y;
if(c1 < 0)
n1 = 0;
else
n1 = c1*c1*c1*c1*(gradient2[gi0][0] * d1.x + gradient2[gi0][1] * d1.y);
if(c1 < 0)
n1 = 0;
else
n1 = c1*c1*c1*c1*(gradient2[gi0][0] * d1.x + gradient2[gi0][1] * d1.y);
if(c2 < 0)
n2 = 0;
else
n2 = c2*c2*c2*c2*(gradient2[gi1][0] * d2.x + gradient2[gi1][1] * d2.y);
if(c2 < 0)
n2 = 0;
else
n2 = c2*c2*c2*c2*(gradient2[gi1][0] * d2.x + gradient2[gi1][1] * d2.y);
if(c3 < 0)
n3 = 0;
else
n3 = c3*c3*c3*c3*(gradient2[gi2][0] * d3.x + gradient2[gi2][1] * d3.y);
if(c3 < 0)
n3 = 0;
else
n3 = c3*c3*c3*c3*(gradient2[gi2][0] * d3.x + gradient2[gi2][1] * d3.y);
return (n1+n2+n3)*70.f;
return (n1+n2+n3)*70.f;
}