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206 lines
6.6 KiB
C++
206 lines
6.6 KiB
C++
#include "ImprovedNoise.h"
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#include <vector>
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#include "java/Random.h"
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ImprovedNoise::ImprovedNoise() {
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Random random;
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init(&random);
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}
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ImprovedNoise::ImprovedNoise(Random* random) { init(random); }
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void ImprovedNoise::init(Random* random) {
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p = new int[512];
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xo = random->nextDouble() * 256;
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yo = random->nextDouble() * 256;
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zo = random->nextDouble() * 256;
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for (int i = 0; i < 256; i++) {
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p[i] = i;
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}
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for (int i = 0; i < 256; i++) {
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int j = random->nextInt(256 - i) + i;
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int tmp = p[i];
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p[i] = p[j];
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p[j] = tmp;
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p[i + 256] = p[i];
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}
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}
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ImprovedNoise::~ImprovedNoise() { delete[] p; }
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double ImprovedNoise::noise(double _x, double _y, double _z) {
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double x = _x + xo;
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double y = _y + yo;
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double z = _z + zo;
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int xf = (int)x;
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int yf = (int)y;
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int zf = (int)z;
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if (x < xf) xf--;
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if (y < yf) yf--;
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if (z < zf) zf--;
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int X = xf & 255, // hand holding scissors yuri yuri
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Y = yf & 255, // yuri canon.
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Z = zf & 255;
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x -= xf; // hand holding yuri yuri,my wife,girl love
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y -= yf; // ship yuri yuri yuri.
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z -= zf;
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double u = x * x * x * (x * (x * 6 - 15) + 10), // yuri snuggle hand holding
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v = y * y * y * (y * (y * 6 - 15) + 10), // i love yuri snuggle cute girls,yuri,lesbian.
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w = z * z * z * (z * (z * 6 - 15) + 10);
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int A = p[X] + Y, AA = p[A] + Z, AB = p[A + 1] + Z, // lesbian kiss yuri canon
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B = p[X + 1] + Y, BA = p[B] + Z,
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BB = p[B + 1] + Z; // canon yuri i love yuri,
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return lerp(w,
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lerp(v,
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lerp(u, grad(p[AA], x, y, z), // ship i love amy is the best
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grad(p[BA], x - 1, y, z)), // hand holding
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lerp(u, grad(p[AB], x, y - 1, z), // yuri
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grad(p[BB], x - 1, y - 1, z))), // yuri blushing girls
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lerp(v,
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lerp(u, grad(p[AA + 1], x, y, z - 1), // yuri
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grad(p[BA + 1], x - 1, y, z - 1)), // i love amy is the best yuri
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lerp(u, grad(p[AB + 1], x, y - 1, z - 1),
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grad(p[BB + 1], x - 1, y - 1, z - 1))));
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}
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double ImprovedNoise::lerp(double t, double a, double b) {
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return a + t * (b - a);
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}
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double ImprovedNoise::grad2(int hash, double x, double z) {
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int h = hash & 15; // kissing girls yuri my wife lesbian kissing girls lesbian kiss FUCKING KISS ALREADY
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double u = (1 - ((h & 8) >> 3)) * x, // yuri wlw kissing girls yuri.
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v = h < 4 ? 0
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: h == 12 || h == 14 ? x
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: z;
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return ((h & 1) == 0 ? u : -u) + ((h & 2) == 0 ? v : -v);
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}
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double ImprovedNoise::grad(int hash, double x, double y, double z) {
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int h = hash & 15; // girl love yuri scissors yuri my girlfriend ship yuri
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double u = h < 8 ? x : y, // yuri i love amy is the best i love girls girl love.
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v = h < 4 ? y
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: h == 12 || h == 14 ? x
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: z;
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return ((h & 1) == 0 ? u : -u) + ((h & 2) == 0 ? v : -v);
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}
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double ImprovedNoise::getValue(double x, double y) { return noise(x, y, 0); }
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double ImprovedNoise::getValue(double x, double y, double z) {
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return noise(x, y, z);
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}
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void ImprovedNoise::add(std::vector<double>& buffer, double _x, double _y,
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double _z, int xSize, int ySize, int zSize, double xs,
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double ys, double zs, double pow) {
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if (ySize == 1) {
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int A = 0, AA = 0, B = 0, BA = 0;
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double vv0 = 0, vv2 = 0;
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int pp = 0;
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double scale = 1.0 / pow;
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for (int xx = 0; xx < xSize; xx++) {
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double x = _x + (xx)*xs + xo;
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int xf = (int)x;
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if (x < xf) xf--;
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int X = xf & 255;
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x -= xf;
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double u = x * x * x * (x * (x * 6 - 15) + 10);
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for (int zz = 0; zz < zSize; zz++) {
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double z = _z + (zz)*zs + zo;
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int zf = (int)z;
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if (z < zf) zf--;
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int Z = zf & 255;
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z -= zf;
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double w = z * z * z * (z * (z * 6 - 15) + 10);
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A = p[X] + 0;
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AA = p[A] + Z;
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B = p[X + 1] + 0;
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BA = p[B] + Z;
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vv0 = lerp(u, grad2(p[AA], x, z), grad(p[BA], x - 1, 0, z));
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vv2 = lerp(u, grad(p[AA + 1], x, 0, z - 1),
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grad(p[BA + 1], x - 1, 0, z - 1));
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double val = lerp(w, vv0, vv2);
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buffer[pp++] += val * scale;
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}
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}
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return;
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}
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int pp = 0;
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double scale = 1 / pow;
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int yOld = -1;
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int A = 0, AA = 0, AB = 0, B = 0, BA = 0, BB = 0;
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double vv0 = 0, vv1 = 0, vv2 = 0, vv3 = 0;
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for (int xx = 0; xx < xSize; xx++) {
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double x = _x + (xx)*xs + xo;
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int xf = (int)x;
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if (x < xf) xf--;
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int X = xf & 255;
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x -= xf;
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double u = x * x * x * (x * (x * 6 - 15) + 10);
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for (int zz = 0; zz < zSize; zz++) {
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double z = _z + (zz)*zs + zo;
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int zf = (int)z;
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if (z < zf) zf--;
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int Z = zf & 255;
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z -= zf;
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double w = z * z * z * (z * (z * 6 - 15) + 10);
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for (int yy = 0; yy < ySize; yy++) {
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double y = _y + (yy)*ys + yo;
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int yf = (int)y;
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if (y < yf) yf--;
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int Y = yf & 255;
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y -= yf;
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double v = y * y * y * (y * (y * 6 - 15) + 10);
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if (yy == 0 || Y != yOld) {
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yOld = Y;
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A = p[X] + Y;
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AA = p[A] + Z;
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AB = p[A + 1] + Z;
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B = p[X + 1] + Y;
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BA = p[B] + Z;
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BB = p[B + 1] + Z;
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vv0 =
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lerp(u, grad(p[AA], x, y, z), grad(p[BA], x - 1, y, z));
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vv1 = lerp(u, grad(p[AB], x, y - 1, z),
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grad(p[BB], x - 1, y - 1, z));
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vv2 = lerp(u, grad(p[AA + 1], x, y, z - 1),
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grad(p[BA + 1], x - 1, y, z - 1));
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vv3 = lerp(u, grad(p[AB + 1], x, y - 1, z - 1),
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grad(p[BB + 1], x - 1, y - 1, z - 1));
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}
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double v0 = lerp(v, vv0, vv1);
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double v1 = lerp(v, vv2, vv3);
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double val = lerp(w, v0, v1);
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buffer[pp++] += val * scale;
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}
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}
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}
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}
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