package com.hypixel.hytale.builtin.hytalegenerator.fields.noise;
import javax.annotation.Nonnull;
class Simplex {
private static final double F2 = 0.5 * (Math.sqrt(3.0) - 1.0);
private static final double G2 = (3.0 - Math.sqrt(3.0)) / 6.0;
private static final double F3 = 0.3333333333333333;
private static final double G3 = 0.16666666666666666;
private static final double F4 = (Math.sqrt(5.0) - 1.0) / 4.0;
private static final double G4 = (5.0 - Math.sqrt(5.0)) / 20.0;
private static final Grad[] grad3 = new Grad[]{new Grad(1.0, 1.0, 0.0), new Grad(-1.0, 1.0, 0.0), new Grad(1.0, -1.0, 0.0), new Grad(-1.0, -1.0, 0.0), new Grad(1.0, 0.0, 1.0), new Grad(-1.0, 0.0, 1.0), new Grad(1.0, 0.0, -1.0), new Grad(-1.0, 0.0, -1.0), new Grad(0.0, 1.0, 1.0), new Grad(0.0, -1.0, 1.0), new Grad(0.0, 1.0, -1.0), new Grad(0.0, -1.0, -1.0)};
private static final Grad[] grad4 = new Grad[]{new Grad(0.0, 1.0, 1.0, 1.0), new Grad(0.0, 1.0, 1.0, -1.0), new Grad(0.0, 1.0, -1.0, 1.0), new Grad(0.0, 1.0, -1.0, -1.0), new Grad(0.0, -1.0, 1.0, 1.0), new Grad(0.0, -1.0, 1.0, -1.0), new Grad(0.0, -1.0, -1.0, 1.0), new Grad(0.0, -1.0, -1.0, -1.0), new Grad(1.0, 0.0, 1.0, 1.0), new Grad(1.0, 0.0, 1.0, -1.0), new Grad(1.0, 0.0, -1.0, 1.0), new Grad(1.0, 0.0, -1.0, -1.0), new Grad(-1.0, 0.0, 1.0, 1.0), new Grad(-1.0, 0.0, 1.0, -1.0), new Grad(-1.0, 0.0, -1.0, 1.0), new Grad(-1.0, 0.0, -1.0, -1.0), new Grad(1.0, 1.0, 0.0, 1.0), new Grad(1.0, 1.0, 0.0, -1.0), new Grad(1.0, -1.0, 0.0, 1.0), new Grad(1.0, -1.0, 0.0, -1.0), new Grad(-1.0, 1.0, 0.0, 1.0), new Grad(-1.0, 1.0, 0.0, -1.0), new Grad(-1.0, -1.0, 0.0, 1.0), new Grad(-1.0, -1.0, 0.0, -1.0), new Grad(1.0, 1.0, 1.0, 0.0), new Grad(1.0, 1.0, -1.0, 0.0), new Grad(1.0, -1.0, 1.0, 0.0), new Grad(1.0, -1.0, -1.0, 0.0), new Grad(-1.0, 1.0, 1.0, 0.0), new Grad(-1.0, 1.0, -1.0, 0.0), new Grad(-1.0, -1.0, 1.0, 0.0), new Grad(-1.0, -1.0, -1.0, 0.0)};
private static final short[] p = new short[]{151, 160, 137, 91, 90, 15, 131, 13, 201, 95, 96, 53, 194, 233, 7, 225, 140, 36, 103, 30, 69, 142, 8, 99, 37, 240, 21, 10, 23, 190, 6, 148, 247, 120, 234, 75, 0, 26, 197, 62, 94, 252, 219, 203, 117, 35, 11, 32, 57, 177, 33, 88, 237, 149, 56, 87, 174, 20, 125, 136, 171, 168, 68, 175, 74, 165, 71, 134, 139, 48, 27, 166, 77, 146, 158, 231, 83, 111, 229, 122, 60, 211, 133, 230, 220, 105, 92, 41, 55, 46, 245, 40, 244, 102, 143, 54, 65, 25, 63, 161, 1, 216, 80, 73, 209, 76, 132, 187, 208, 89, 18, 169, 200, 196, 135, 130, 116, 188, 159, 86, 164, 100, 109, 198, 173, 186, 3, 64, 52, 217, 226, 250, 124, 123, 5, 202, 38, 147, 118, 126, 255, 82, 85, 212, 207, 206, 59, 227, 47, 16, 58, 17, 182, 189, 28, 42, 223, 183, 170, 213, 119, 248, 152, 2, 44, 154, 163, 70, 221, 153, 101, 155, 167, 43, 172, 9, 129, 22, 39, 253, 19, 98, 108, 110, 79, 113, 224, 232, 178, 185, 112, 104, 218, 246, 97, 228, 251, 34, 242, 193, 238, 210, 144, 12, 191, 179, 162, 241, 81, 51, 145, 235, 249, 14, 239, 107, 49, 192, 214, 31, 181, 199, 106, 157, 184, 84, 204, 176, 115, 121, 50, 45, 127, 4, 150, 254, 138, 236, 205, 93, 222, 114, 67, 29, 24, 72, 243, 141, 128, 195, 78, 66, 215, 61, 156, 180};
private static final short[] perm = new short[512];
private static final short[] permMod12 = new short[512];
Simplex() {
}
private static int fastfloor(double x) {
int xi = (int)x;
return x < (double)xi ? xi - 1 : xi;
}
private static double dot(@Nonnull Grad g, double x, double y) {
return g.x * x + g.y * y;
}
private static double dot(@Nonnull Grad g, double x, double y, double z) {
return g.x * x + g.y * y + g.z * z;
}
private static double dot(@Nonnull Grad g, double x, double y, double z, double w) {
return g.x * x + g.y * y + g.z * z + g.w * w;
}
public static double noise(double xin, double yin) {
double s = (xin + yin) * F2;
int i = fastfloor(xin + s);
int j = fastfloor(yin + s);
double t = (double)(i + j) * G2;
double X0 = (double)i - t;
double Y0 = (double)j - t;
double x0 = xin - X0;
double y0 = yin - Y0;
int i1;
int j1;
if (x0 > y0) {
i1 = 1;
j1 = 0;
} else {
i1 = 0;
j1 = 1;
}
double x1 = x0 - (double)i1 + G2;
double y1 = y0 - (double)j1 + G2;
double x2 = x0 - 1.0 + 2.0 * G2;
double y2 = y0 - 1.0 + 2.0 * G2;
int ii = i & 255;
int jj = j & 255;
int gi0 = permMod12[ii + perm[jj]];
int gi1 = permMod12[ii + i1 + perm[jj + j1]];
int gi2 = permMod12[ii + 1 + perm[jj + 1]];
double t0 = 0.5 - x0 * x0 - y0 * y0;
double n0;
if (t0 < 0.0) {
n0 = 0.0;
} else {
t0 *= t0;
n0 = t0 * t0 * dot(grad3[gi0], x0, y0);
}
double t1 = 0.5 - x1 * x1 - y1 * y1;
double n1;
if (t1 < 0.0) {
n1 = 0.0;
} else {
t1 *= t1;
n1 = t1 * t1 * dot(grad3[gi1], x1, y1);
}
double t2 = 0.5 - x2 * x2 - y2 * y2;
double n2;
if (t2 < 0.0) {
n2 = 0.0;
} else {
t2 *= t2;
n2 = t2 * t2 * dot(grad3[gi2], x2, y2);
}
return 70.0 * (n0 + n1 + n2);
}
public static double noise(double xin, double yin, double zin) {
double s = (xin + yin + zin) * 0.3333333333333333;
int i = fastfloor(xin + s);
int j = fastfloor(yin + s);
int k = fastfloor(zin + s);
double t = (double)(i + j + k) * 0.16666666666666666;
double X0 = (double)i - t;
double Y0 = (double)j - t;
double Z0 = (double)k - t;
double x0 = xin - X0;
double y0 = yin - Y0;
double z0 = zin - Z0;
int i1;
int j1;
int k1;
int i2;
int j2;
int k2;
if (x0 >= y0) {
if (y0 >= z0) {
i1 = 1;
j1 = 0;
k1 = 0;
i2 = 1;
j2 = 1;
k2 = 0;
} else if (x0 >= z0) {
i1 = 1;
j1 = 0;
k1 = 0;
i2 = 1;
j2 = 0;
k2 = 1;
} else {
i1 = 0;
j1 = 0;
k1 = 1;
i2 = 1;
j2 = 0;
k2 = 1;
}
} else if (y0 < z0) {
i1 = 0;
j1 = 0;
k1 = 1;
i2 = 0;
j2 = 1;
k2 = 1;
} else if (x0 < z0) {
i1 = 0;
j1 = 1;
k1 = 0;
i2 = 0;
j2 = 1;
k2 = 1;
} else {
i1 = 0;
j1 = 1;
k1 = 0;
i2 = 1;
j2 = 1;
k2 = 0;
}
double x1 = x0 - (double)i1 + 0.16666666666666666;
double y1 = y0 - (double)j1 + 0.16666666666666666;
double z1 = z0 - (double)k1 + 0.16666666666666666;
double x2 = x0 - (double)i2 + 0.3333333333333333;
double y2 = y0 - (double)j2 + 0.3333333333333333;
double z2 = z0 - (double)k2 + 0.3333333333333333;
double x3 = x0 - 1.0 + 0.5;
double y3 = y0 - 1.0 + 0.5;
double z3 = z0 - 1.0 + 0.5;
int ii = i & 255;
int jj = j & 255;
int kk = k & 255;
int gi0 = permMod12[ii + perm[jj + perm[kk]]];
int gi1 = permMod12[ii + i1 + perm[jj + j1 + perm[kk + k1]]];
int gi2 = permMod12[ii + i2 + perm[jj + j2 + perm[kk + k2]]];
int gi3 = permMod12[ii + 1 + perm[jj + 1 + perm[kk + 1]]];
double t0 = 0.6 - x0 * x0 - y0 * y0 - z0 * z0;
double n0;
if (t0 < 0.0) {
n0 = 0.0;
} else {
t0 *= t0;
n0 = t0 * t0 * dot(grad3[gi0], x0, y0, z0);
}
double t1 = 0.6 - x1 * x1 - y1 * y1 - z1 * z1;
double n1;
if (t1 < 0.0) {
n1 = 0.0;
} else {
t1 *= t1;
n1 = t1 * t1 * dot(grad3[gi1], x1, y1, z1);
}
double t2 = 0.6 - x2 * x2 - y2 * y2 - z2 * z2;
double n2;
if (t2 < 0.0) {
n2 = 0.0;
} else {
t2 *= t2;
n2 = t2 * t2 * dot(grad3[gi2], x2, y2, z2);
}
double t3 = 0.6 - x3 * x3 - y3 * y3 - z3 * z3;
double n3;
if (t3 < 0.0) {
n3 = 0.0;
} else {
t3 *= t3;
n3 = t3 * t3 * dot(grad3[gi3], x3, y3, z3);
}
return 32.0 * (n0 + n1 + n2 + n3);
}
public static double noise(double x, double y, double z, double w) {
double s = (x + y + z + w) * F4;
int i = fastfloor(x + s);
int j = fastfloor(y + s);
int k = fastfloor(z + s);
int l = fastfloor(w + s);
double t = (double)(i + j + k + l) * G4;
double X0 = (double)i - t;
double Y0 = (double)j - t;
double Z0 = (double)k - t;
double W0 = (double)l - t;
double x0 = x - X0;
double y0 = y - Y0;
double z0 = z - Z0;
double w0 = w - W0;
int rankx = 0;
int ranky = 0;
int rankz = 0;
int rankw = 0;
if (x0 > y0) {
++rankx;
} else {
++ranky;
}
if (x0 > z0) {
++rankx;
} else {
++rankz;
}
if (x0 > w0) {
++rankx;
} else {
++rankw;
}
if (y0 > z0) {
++ranky;
} else {
++rankz;
}
if (y0 > w0) {
++ranky;
} else {
++rankw;
}
if (z0 > w0) {
++rankz;
} else {
++rankw;
}
int i1 = rankx >= 3 ? 1 : 0;
int j1 = ranky >= 3 ? 1 : 0;
int k1 = rankz >= 3 ? 1 : 0;
int l1 = rankw >= 3 ? 1 : 0;
int i2 = rankx >= 2 ? 1 : 0;
int j2 = ranky >= 2 ? 1 : 0;
int k2 = rankz >= 2 ? 1 : 0;
int l2 = rankw >= 2 ? 1 : 0;
int i3 = rankx >= 1 ? 1 : 0;
int j3 = ranky >= 1 ? 1 : 0;
int k3 = rankz >= 1 ? 1 : 0;
int l3 = rankw >= 1 ? 1 : 0;
double x1 = x0 - (double)i1 + G4;
double y1 = y0 - (double)j1 + G4;
double z1 = z0 - (double)k1 + G4;
double w1 = w0 - (double)l1 + G4;
double x2 = x0 - (double)i2 + 2.0 * G4;
double y2 = y0 - (double)j2 + 2.0 * G4;
double z2 = z0 - (double)k2 + 2.0 * G4;
double w2 = w0 - (double)l2 + 2.0 * G4;
double x3 = x0 - (double)i3 + 3.0 * G4;
double y3 = y0 - (double)j3 + 3.0 * G4;
double z3 = z0 - (double)k3 + 3.0 * G4;
double w3 = w0 - (double)l3 + 3.0 * G4;
double x4 = x0 - 1.0 + 4.0 * G4;
double y4 = y0 - 1.0 + 4.0 * G4;
double z4 = z0 - 1.0 + 4.0 * G4;
double w4 = w0 - 1.0 + 4.0 * G4;
int ii = i & 255;
int jj = j & 255;
int kk = k & 255;
int ll = l & 255;
int gi0 = perm[ii + perm[jj + perm[kk + perm[ll]]]] % 32;
int gi1 = perm[ii + i1 + perm[jj + j1 + perm[kk + k1 + perm[ll + l1]]]] % 32;
int gi2 = perm[ii + i2 + perm[jj + j2 + perm[kk + k2 + perm[ll + l2]]]] % 32;
int gi3 = perm[ii + i3 + perm[jj + j3 + perm[kk + k3 + perm[ll + l3]]]] % 32;
int gi4 = perm[ii + 1 + perm[jj + 1 + perm[kk + 1 + perm[ll + 1]]]] % 32;
double t0 = 0.5 - x0 * x0 - y0 * y0 - z0 * z0 - w0 * w0;
double n0;
if (t0 < 0.0) {
n0 = 0.0;
} else {
t0 *= t0;
n0 = t0 * t0 * dot(grad4[gi0], x0, y0, z0, w0);
}
double t1 = 0.6 - x1 * x1 - y1 * y1 - z1 * z1 - w1 * w1;
double n1;
if (t1 < 0.0) {
n1 = 0.0;
} else {
t1 *= t1;
n1 = t1 * t1 * dot(grad4[gi1], x1, y1, z1, w1);
}
double t2 = 0.6 - x2 * x2 - y2 * y2 - z2 * z2 - w2 * w2;
double n2;
if (t2 < 0.0) {
n2 = 0.0;
} else {
t2 *= t2;
n2 = t2 * t2 * dot(grad4[gi2], x2, y2, z2, w2);
}
double t3 = 0.6 - x3 * x3 - y3 * y3 - z3 * z3 - w3 * w3;
double n3;
if (t3 < 0.0) {
n3 = 0.0;
} else {
t3 *= t3;
n3 = t3 * t3 * dot(grad4[gi3], x3, y3, z3, w3);
}
double t4 = 0.6 - x4 * x4 - y4 * y4 - z4 * z4 - w4 * w4;
double n4;
if (t4 < 0.0) {
n4 = 0.0;
} else {
t4 *= t4;
n4 = t4 * t4 * dot(grad4[gi4], x4, y4, z4, w4);
}
return 27.0 * (n0 + n1 + n2 + n3 + n4);
}
static {
for(int i = 0; i < 512; ++i) {
perm[i] = p[i & 255];
permMod12[i] = (short)(perm[i] % 12);
}
}
private static class Grad {
double x;
double y;
double z;
double w;
Grad(double x, double y, double z) {
this.x = x;
this.y = y;
this.z = z;
}
Grad(double x, double y, double z, double w) {
this.x = x;
this.y = y;
this.z = z;
this.w = w;
}
}
}