sid/NazaraEngine
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Replaced templates by float

Browse Source 
*Since only valid template parameters were float and double, the whole
template aspect has been removed.
Double precision would only be used in extremely rare occasions
(applications needing high precision and slow performances), it is not
relevant to template the whole module for it.


Former-commit-id: fc6dd028189c608a6a7b4c312b3e5e3f53a01fd7
This commit is contained in:
Remi Beges
2012-10-27 18:59:39 +02:00
parent 745b9dbbd1
commit 9fef43951b
25 changed files with 239 additions and 346 deletions
Download Patch File Download Diff File Expand all files Collapse all files

154
src/Nazara/Noise/Simplex3D.cpp Normal file
View File

@@ -0,0 +1,154 @@
// Copyright (C) 2012 Rémi Bèges
// This file is part of the "Nazara Engine - Noise module"
// For conditions of distribution and use, see copyright notice in Config.hpp
#include <Nazara/Core/Error.hpp>
#include <Nazara/Noise/Config.hpp>
#include <Nazara/Noise/Simplex3D.hpp>
#include <Nazara/Noise/Debug.hpp>
NzSimplex3D::NzSimplex3D()
{
SkewCoeff3D = 1/3.;
UnskewCoeff3D = 1/6.;
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}};
for(int i(0) ; i < 12 ; ++i)
for(int j(0) ; j < 3 ; ++j)
gradient3[i][j] = grad3Temp[i][j];
}
float NzSimplex3D::GetValue(float x, float y, float z, float resolution)
{
x *= resolution;
y *= resolution;
z *= resolution;
sum = (x + y + z) * SkewCoeff3D;
skewedCubeOrigin.x = fastfloor(x + sum);
skewedCubeOrigin.y = fastfloor(y + sum);
skewedCubeOrigin.z = fastfloor(z + sum);
sum = (skewedCubeOrigin.x + skewedCubeOrigin.y + skewedCubeOrigin.z) * UnskewCoeff3D;
unskewedCubeOrigin.x = skewedCubeOrigin.x - sum;
unskewedCubeOrigin.y = skewedCubeOrigin.y - sum;
unskewedCubeOrigin.z = skewedCubeOrigin.z - sum;
unskewedDistToOrigin.x = x - unskewedCubeOrigin.x;
unskewedDistToOrigin.y = y - unskewedCubeOrigin.y;
unskewedDistToOrigin.z = z - unskewedCubeOrigin.z;
if(unskewedDistToOrigin.x >= unskewedDistToOrigin.y)
{
if(unskewedDistToOrigin.y >= unskewedDistToOrigin.z)
{
off1.x = 1;
off1.y = 0;
off1.z = 0;
off2.x = 1;
off2.y = 1;
off2.z = 0;
}
else if(unskewedDistToOrigin.x >= unskewedDistToOrigin.z)
{
off1.x = 1;
off1.y = 0;
off1.z = 0;
off2.x = 1;
off2.y = 0;
off2.z = 1;
}
else
{
off1.x = 0;
off1.y = 0;
off1.z = 1;
off2.x = 1;
off2.y = 0;
off2.z = 1;
}
}
else
{
if(unskewedDistToOrigin.y < unskewedDistToOrigin.z)
{
off1.x = 0;
off1.y = 0;
off1.z = 1;
off2.x = 0;
off2.y = 1;
off2.z = 1;
}
else if(unskewedDistToOrigin.x < unskewedDistToOrigin.z)
{
off1.x = 0;
off1.y = 1;
off1.z = 0;
off2.x = 0;
off2.y = 1;
off2.z = 1;
}
else
{
off1.x = 0;
off1.y = 1;
off1.z = 0;
off2.x = 1;
off2.y = 1;
off2.z = 0;
}
}
d1 = unskewedDistToOrigin;
d2.x = d1.x - off1.x + UnskewCoeff3D;
d2.y = d1.y - off1.y + UnskewCoeff3D;
d2.z = d1.z - off1.z + UnskewCoeff3D;
d3.x = d1.x - off2.x + 2*UnskewCoeff3D;
d3.y = d1.y - off2.y + 2*UnskewCoeff3D;
d3.z = d1.z - off2.z + 2*UnskewCoeff3D;
d4.x = d1.x - 1.0 + 3*UnskewCoeff3D;
d4.y = d1.y - 1.0 + 3*UnskewCoeff3D;
d4.z = d1.z - 1.0 + 3*UnskewCoeff3D;
ii = skewedCubeOrigin.x & 255;
jj = skewedCubeOrigin.y & 255;
kk = skewedCubeOrigin.z & 255;
gi0 = perm[ii + perm[jj + perm[kk ]]] % 12;
gi1 = perm[ii + off1.x + perm[jj + off1.y + perm[kk + off1.z]]] % 12;
gi2 = perm[ii + off2.x + perm[jj + off2.y + perm[kk + off2.z]]] % 12;
gi3 = perm[ii + 1 + perm[jj + 1 + perm[kk + 1 ]]] % 12;
c1 = 0.6 - d1.x * d1.x - d1.y * d1.y - d1.z * d1.z;
c2 = 0.6 - d2.x * d2.x - d2.y * d2.y - d2.z * d2.z;
c3 = 0.6 - d3.x * d3.x - d3.y * d3.y - d3.z * d3.z;
c4 = 0.6 - d4.x * d4.x - d4.y * d4.y - d4.z * d4.z;
if(c1 < 0)
n1 = 0;
else
n1 = c1*c1*c1*c1*(gradient3[gi0][0] * d1.x + gradient3[gi0][1] * d1.y + gradient3[gi0][2] * d1.z);
if(c2 < 0)
n2 = 0;
else
n2 = c2*c2*c2*c2*(gradient3[gi1][0] * d2.x + gradient3[gi1][1] * d2.y + gradient3[gi1][2] * d2.z);
if(c3 < 0)
n3 = 0;
else
n3 = c3*c3*c3*c3*(gradient3[gi2][0] * d3.x + gradient3[gi2][1] * d3.y + gradient3[gi2][2] * d3.z);
if(c4 < 0)
n4 = 0;
else
n4 = c4*c4*c4*c4*(gradient3[gi3][0] * d4.x + gradient3[gi3][1] * d4.y + gradient3[gi3][2] * d4.z);
return (n1+n2+n3+n4)*32;
}