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  1. import java.util.*;
  2.  
  3. class Hoge {
  4. 	public static void main(String[] args) {
  5. 		// input ex: 25.4 0.45 129.3
  6. 		Scanner sc = new Scanner(System.in);
  7. 		double x = sc.nextDouble();
  8. 		double y = sc.nextDouble();
  9. 		double z = sc.nextDouble();
  10. 		double n = ImprovedNoise.noise(x, y, z);
  11. 		System.out.println("x:" + x + " y:" + y + " z:" + z + " n:" + n);
  12. 	}
  13. }
  14.  
  15. // JAVA REFERENCE IMPLEMENTATION OF IMPROVED NOISE - COPYRIGHT 2002 KEN PERLIN.
  16.  
  17. //public
  18.  final class ImprovedNoise {
  19.    static public double noise(double x, double y, double z) {
  20.       int X = (int)Math.floor(x) & 255,                  // FIND UNIT CUBE THAT
  21.           Y = (int)Math.floor(y) & 255,                  // CONTAINS POINT.
  22.           Z = (int)Math.floor(z) & 255;
  23.       x -= Math.floor(x);                                // FIND RELATIVE X,Y,Z
  24.       y -= Math.floor(y);                                // OF POINT IN CUBE.
  25.       z -= Math.floor(z);
  26.       double u = fade(x),                                // COMPUTE FADE CURVES
  27.              v = fade(y),                                // FOR EACH OF X,Y,Z.
  28.              w = fade(z);
  29.       int A = p[X  ]+Y, AA = p[A]+Z, AB = p[A+1]+Z,      // HASH COORDINATES OF
  30.           B = p[X+1]+Y, BA = p[B]+Z, BB = p[B+1]+Z;      // THE 8 CUBE CORNERS,
  31.  
  32.       return lerp(w, lerp(v, lerp(u, grad(p[AA  ], x  , y  , z   ),  // AND ADD
  33.                                      grad(p[BA  ], x-1, y  , z   )), // BLENDED
  34.                              lerp(u, grad(p[AB  ], x  , y-1, z   ),  // RESULTS
  35.                                      grad(p[BB  ], x-1, y-1, z   ))),// FROM  8
  36.                      lerp(v, lerp(u, grad(p[AA+1], x  , y  , z-1 ),  // CORNERS
  37.                                      grad(p[BA+1], x-1, y  , z-1 )), // OF CUBE
  38.                              lerp(u, grad(p[AB+1], x  , y-1, z-1 ),
  39.                                      grad(p[BB+1], x-1, y-1, z-1 ))));
  40.    }
  41.    static double fade(double t) { return t * t * t * (t * (t * 6 - 15) + 10); }
  42.    static double lerp(double t, double a, double b) { return a + t * (b - a); }
  43.    static double grad(int hash, double x, double y, double z) {
  44.       int h = hash & 15;                      // CONVERT LO 4 BITS OF HASH CODE
  45.       double u = h<8 ? x : y,                 // INTO 12 GRADIENT DIRECTIONS.
  46.              v = h<4 ? y : h==12||h==14 ? x : z;
  47.       return ((h&1) == 0 ? u : -u) + ((h&2) == 0 ? v : -v);
  48.    }
  49.    static final int p[] = new int[512], permutation[] = { 151,160,137,91,90,15,
  50.    131,13,201,95,96,53,194,233,7,225,140,36,103,30,69,142,8,99,37,240,21,10,23,
  51.    190, 6,148,247,120,234,75,0,26,197,62,94,252,219,203,117,35,11,32,57,177,33,
  52.    88,237,149,56,87,174,20,125,136,171,168, 68,175,74,165,71,134,139,48,27,166,
  53.    77,146,158,231,83,111,229,122,60,211,133,230,220,105,92,41,55,46,245,40,244,
  54.    102,143,54, 65,25,63,161, 1,216,80,73,209,76,132,187,208, 89,18,169,200,196,
  55.    135,130,116,188,159,86,164,100,109,198,173,186, 3,64,52,217,226,250,124,123,
  56.    5,202,38,147,118,126,255,82,85,212,207,206,59,227,47,16,58,17,182,189,28,42,
  57.    223,183,170,213,119,248,152, 2,44,154,163, 70,221,153,101,155,167, 43,172,9,
  58.    129,22,39,253, 19,98,108,110,79,113,224,232,178,185, 112,104,218,246,97,228,
  59.    251,34,242,193,238,210,144,12,191,179,162,241, 81,51,145,235,249,14,239,107,
  60.    49,192,214, 31,181,199,106,157,184, 84,204,176,115,121,50,45,127, 4,150,254,
  61.    138,236,205,93,222,114,67,29,24,72,243,141,128,195,78,66,215,61,156,180
  62.    };
  63.    static { for (int i=0; i < 256 ; i++) p[256+i] = p[i] = permutation[i]; }
  64. }
  65.  
Success #stdin #stdout 0.07s 2184192KB
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25.4 0.45 129.3
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x:25.4 y:0.45 z:129.3 n:0.46539827681365775
https://ideone.com/Pd8ceq
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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