306 lines
3.6 KiB
JavaScript
306 lines
3.6 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
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function init() {
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const _p2 = [
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66,
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215,
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61,
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156,
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180
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];
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for (let i = 0; i < 256; i++) {
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_p2[256 + i] = _p2[i];
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}
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return _p2;
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}
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const _p = /* @__PURE__ */ init();
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function fade(t) {
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return t * t * t * (t * (t * 6 - 15) + 10);
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}
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function lerp(t, a, b) {
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return a + t * (b - a);
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}
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function grad(hash, x, y, z) {
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const h = hash & 15;
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const u = h < 8 ? x : y, v = h < 4 ? y : h == 12 || h == 14 ? x : z;
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return ((h & 1) == 0 ? u : -u) + ((h & 2) == 0 ? v : -v);
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}
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class ImprovedNoise {
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noise(x, y, z) {
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const floorX = Math.floor(x), floorY = Math.floor(y), floorZ = Math.floor(z);
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const X = floorX & 255, Y = floorY & 255, Z = floorZ & 255;
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x -= floorX;
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y -= floorY;
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z -= floorZ;
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const xMinus1 = x - 1, yMinus1 = y - 1, zMinus1 = z - 1;
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const u = fade(x), v = fade(y), w = fade(z);
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const A = _p[X] + Y, AA = _p[A] + Z, AB = _p[A + 1] + Z, B = _p[X + 1] + Y, BA = _p[B] + Z, BB = _p[B + 1] + Z;
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return lerp(
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w,
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lerp(
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v,
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lerp(u, grad(_p[AA], x, y, z), grad(_p[BA], xMinus1, y, z)),
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lerp(u, grad(_p[AB], x, yMinus1, z), grad(_p[BB], xMinus1, yMinus1, z))
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),
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lerp(
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v,
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lerp(u, grad(_p[AA + 1], x, y, zMinus1), grad(_p[BA + 1], xMinus1, y, zMinus1)),
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lerp(u, grad(_p[AB + 1], x, yMinus1, zMinus1), grad(_p[BB + 1], xMinus1, yMinus1, zMinus1))
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)
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);
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}
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}
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exports.ImprovedNoise = ImprovedNoise;
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//# sourceMappingURL=ImprovedNoise.cjs.map
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