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Work on sub biomes

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This commit is contained in:
Adubbz 2014-05-10 20:19:47 +10:00
parent 4781166766
commit e100e97c2a
5 changed files with 242 additions and 77 deletions
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5
src/main/java/biomesoplenty/api/content/BOPCBiomes.java
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@ -65,6 +65,11 @@ public class BOPCBiomes
public static BiomeGenBase woodland;
//Sub Biomes
public static BiomeGenBase kelpForest;
//Nether Biomes
public static BiomeGenBase corruptedSands;
public static BiomeGenBase phantasmagoricInferno;
public static BiomeGenBase boneyard;
public static BiomeGenBase visceralHeap;
}

9
src/main/java/biomesoplenty/common/biomes/BOPSubBiome.java
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@ -7,14 +7,13 @@ import biomesoplenty.common.world.layer.GenLayerSubBiome;
public abstract class BOPSubBiome extends BOPBiome
{
public int minRadius;
public int maxRadius;
/**Smaller numbers zoom in the noise field (biomes are less common)*/
public double zoom;
/**The strength the field must reach to replace the biome. Larger numbers result in smaller patches.*/
public double threshold;
public BOPSubBiome(int biomeID)
{
super(biomeID);
this.minRadius = 2;
this.maxRadius = 5;
}
}

74
src/main/java/biomesoplenty/common/core/BOPBiomes.java
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@ -1,63 +1,6 @@
package biomesoplenty.common.core;
import static biomesoplenty.api.content.BOPCBiomes.alps;
import static biomesoplenty.api.content.BOPCBiomes.arctic;
import static biomesoplenty.api.content.BOPCBiomes.bambooForest;
import static biomesoplenty.api.content.BOPCBiomes.bayou;
import static biomesoplenty.api.content.BOPCBiomes.bog;
import static biomesoplenty.api.content.BOPCBiomes.borealForest;
import static biomesoplenty.api.content.BOPCBiomes.brushland;
import static biomesoplenty.api.content.BOPCBiomes.canyon;
import static biomesoplenty.api.content.BOPCBiomes.chaparral;
import static biomesoplenty.api.content.BOPCBiomes.cherryBlossomGrove;
import static biomesoplenty.api.content.BOPCBiomes.coniferousForest;
import static biomesoplenty.api.content.BOPCBiomes.crag;
import static biomesoplenty.api.content.BOPCBiomes.deadForest;
import static biomesoplenty.api.content.BOPCBiomes.deadSwamp;
import static biomesoplenty.api.content.BOPCBiomes.deciduousForest;
import static biomesoplenty.api.content.BOPCBiomes.dunes;
import static biomesoplenty.api.content.BOPCBiomes.fen;
import static biomesoplenty.api.content.BOPCBiomes.flowerField;
import static biomesoplenty.api.content.BOPCBiomes.frostForest;
import static biomesoplenty.api.content.BOPCBiomes.grassland;
import static biomesoplenty.api.content.BOPCBiomes.grove;
import static biomesoplenty.api.content.BOPCBiomes.heathland;
import static biomesoplenty.api.content.BOPCBiomes.highland;
import static biomesoplenty.api.content.BOPCBiomes.jadeCliffs;
import static biomesoplenty.api.content.BOPCBiomes.lavenderFields;
import static biomesoplenty.api.content.BOPCBiomes.lushDesert;
import static biomesoplenty.api.content.BOPCBiomes.lushSwamp;
import static biomesoplenty.api.content.BOPCBiomes.mapleWoods;
import static biomesoplenty.api.content.BOPCBiomes.marsh;
import static biomesoplenty.api.content.BOPCBiomes.meadow;
import static biomesoplenty.api.content.BOPCBiomes.moor;
import static biomesoplenty.api.content.BOPCBiomes.mountain;
import static biomesoplenty.api.content.BOPCBiomes.mysticGrove;
import static biomesoplenty.api.content.BOPCBiomes.ominousWoods;
import static biomesoplenty.api.content.BOPCBiomes.originValley;
import static biomesoplenty.api.content.BOPCBiomes.outback;
import static biomesoplenty.api.content.BOPCBiomes.prairie;
import static biomesoplenty.api.content.BOPCBiomes.quagmire;
import static biomesoplenty.api.content.BOPCBiomes.rainforest;
import static biomesoplenty.api.content.BOPCBiomes.redwoodForest;
import static biomesoplenty.api.content.BOPCBiomes.sacredSprings;
import static biomesoplenty.api.content.BOPCBiomes.seasonalForest;
import static biomesoplenty.api.content.BOPCBiomes.shield;
import static biomesoplenty.api.content.BOPCBiomes.shrubland;
import static biomesoplenty.api.content.BOPCBiomes.silkglades;
import static biomesoplenty.api.content.BOPCBiomes.sludgepit;
import static biomesoplenty.api.content.BOPCBiomes.snowyConiferousForest;
import static biomesoplenty.api.content.BOPCBiomes.spruceWoods;
import static biomesoplenty.api.content.BOPCBiomes.temperateRainforest;
import static biomesoplenty.api.content.BOPCBiomes.thicket;
import static biomesoplenty.api.content.BOPCBiomes.timber;
import static biomesoplenty.api.content.BOPCBiomes.tropicalRainforest;
import static biomesoplenty.api.content.BOPCBiomes.tropics;
import static biomesoplenty.api.content.BOPCBiomes.tundra;
import static biomesoplenty.api.content.BOPCBiomes.volcano;
import static biomesoplenty.api.content.BOPCBiomes.wasteland;
import static biomesoplenty.api.content.BOPCBiomes.wetland;
import static biomesoplenty.api.content.BOPCBiomes.woodland;
import static biomesoplenty.api.content.BOPCBiomes.*;
import java.util.ArrayList;
import java.util.List;
@ -136,6 +79,7 @@ import biomesoplenty.common.biomes.overworld.BiomeGenVolcano;
import biomesoplenty.common.biomes.overworld.BiomeGenWasteland;
import biomesoplenty.common.biomes.overworld.BiomeGenWetland;
import biomesoplenty.common.biomes.overworld.BiomeGenWoodland;
import biomesoplenty.common.biomes.overworld.subbiomes.ocean.BiomeGenKelpForest;
import biomesoplenty.common.configuration.BOPConfigurationBiomeGen;
import biomesoplenty.common.configuration.BOPConfigurationIDs;
import biomesoplenty.common.configuration.BOPConfigurationMisc;
@ -233,16 +177,12 @@ public class BOPBiomes
wetland = registerOverworldBiome(BiomeGenWetland.class, "Wetland", TemperatureType.WARM, 10);
woodland = registerOverworldBiome(BiomeGenWoodland.class, "Woodland", TemperatureType.WARM, 10);
//Sub Biomes
//new BiomeGenKelpForest(BOPConfigurationIDs.oceanKelpID).setBiomeName("Kelp Forest");
//Nether Biomes
registerNetherBiome(BiomeGenCorruptedSands.class, "Corrupted Sands", 10);
corruptedSands = registerNetherBiome(BiomeGenCorruptedSands.class, "Corrupted Sands", 10);
//registerBiome(new BiomeEntry(new BiomeGenUndergarden(BOPConfigurationIDs.netherUndergardenID).setBiomeName("Undergarden"), 10), -1);
registerNetherBiome(BiomeGenPhantasmagoricInferno.class, "Phantasmagoric Inferno", 10);
registerNetherBiome(BiomeGenBoneyard.class, "Boneyard", 10);
registerNetherBiome(BiomeGenVisceralHeap.class, "Visceral Heap", 10);
phantasmagoricInferno = registerNetherBiome(BiomeGenPhantasmagoricInferno.class, "Phantasmagoric Inferno", 10);
boneyard = registerNetherBiome(BiomeGenBoneyard.class, "Boneyard", 10);
visceralHeap = registerNetherBiome(BiomeGenVisceralHeap.class, "Visceral Heap", 10);
}
private static void addSpawnBiomes()
@ -413,7 +353,7 @@ public class BOPBiomes
{
if (BOPBiomeManager.overworldSubBiomes[parent] == null) BOPBiomeManager.overworldSubBiomes[parent] = new ArrayList();
BOPBiomeManager.overworldBiomes[parent].add(entry);
BOPBiomeManager.overworldSubBiomes[parent].add(entry);
}
}

7
src/main/java/biomesoplenty/common/world/layer/GenLayerSubBiome.java
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@ -7,6 +7,7 @@ import net.minecraft.world.gen.layer.IntCache;
import biomesoplenty.api.BOPBiomeManager;
import biomesoplenty.api.BOPBiomeManager.BiomeEntry;
import biomesoplenty.common.biomes.BOPSubBiome;
import biomesoplenty.common.world.noise.SimplexNoise;
public class GenLayerSubBiome extends GenLayer
{
@ -35,13 +36,11 @@ public class GenLayerSubBiome extends GenLayer
if (selectedSubBiome != null)
{
/*if (SimplexNoise.noise((xi + x) * selectedSubBiome.getZoom(), (zi + z) * selectedSubBiome.getZoom()) > selectedSubBiome.getThreshold())
if (SimplexNoise.noise((xi + x) * selectedSubBiome.zoom, (zi + z) * selectedSubBiome.zoom) > selectedSubBiome.threshold)
{
System.out.println(SimplexNoise.noise((xi + x) * selectedSubBiome.getZoom(), (zi + z) * selectedSubBiome.getZoom()));
System.out.printf("Replaced Biome at %d, %d\n", xi + x, zi + z);
outputBiomeIDs[xi + zi * width] = selectedSubBiome.biomeID;
}
else outputBiomeIDs[xi + zi * width] = currentBiomeId;*/
else outputBiomeIDs[xi + zi * width] = currentBiomeId;
}
else
{

222
src/main/java/biomesoplenty/common/world/noise/SimplexNoise.java Normal file
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@ -0,0 +1,222 @@
package biomesoplenty.common.world.noise;
/**
* A speed-improved simplex noise algorithm for 2D, 3D and 4D in Java.
*
* Based on example code by Stefan Gustavson (stegu@itn.liu.se).
* Optimisations by Peter Eastman (peastman@drizzle.stanford.edu).
* Better rank ordering method by Stefan Gustavson in 2012.
*
* This could be speeded up even further, but it's useful as it is.
*
* Version 2012-03-09
*
* This code was placed in the public domain by its original author,
* Stefan Gustavson. You may use it as you see fit, but
* attribution is appreciated.
*
*/
public final class SimplexNoise { // Simplex noise in 2D, 3D and 4D
private static Grad[] grad3 = {new Grad(1, 1, 0), new Grad(-1, 1, 0), new Grad(1, -1, 0), new Grad(-1, -1, 0),
new Grad(1, 0, 1), new Grad(-1, 0, 1),
new Grad(1, 0, -1), new Grad(-1, 0, -1), new Grad(0, 1, 1), new Grad(0, -1, 1), new Grad(0, 1, -1), new Grad(0, -1, -1)};
// private static Grad grad4[]= {new Grad(0,1,1,1),new Grad(0,1,1,-1),new Grad(0,1,-1,1),new Grad(0,1,-1,-1),
// new Grad(0,-1,1,1),new Grad(0,-1,1,-1),new Grad(0,-1,-1,1),new Grad(0,-1,-1,-1),
// new Grad(1,0,1,1),new Grad(1,0,1,-1),new Grad(1,0,-1,1),new Grad(1,0,-1,-1),
// new Grad(-1,0,1,1),new Grad(-1,0,1,-1),new Grad(-1,0,-1,1),new Grad(-1,0,-1,-1),
// new Grad(1,1,0,1),new Grad(1,1,0,-1),new Grad(1,-1,0,1),new Grad(1,-1,0,-1),
// new Grad(-1,1,0,1),new Grad(-1,1,0,-1),new Grad(-1,-1,0,1),new Grad(-1,-1,0,-1),
// new Grad(1,1,1,0),new Grad(1,1,-1,0),new Grad(1,-1,1,0),new Grad(1,-1,-1,0),
// new Grad(-1,1,1,0),new Grad(-1,1,-1,0),new Grad(-1,-1,1,0),new Grad(-1,-1,-1,0)};
private static short[] p = {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};
// To remove the need for index wrapping, double the permutation table length
private static short[] perm = new short[512];
private static short[] permMod12 = new short[512];
static {
for (int i = 0; i < 512; i++) {
perm[i] = p[i & 255];
permMod12[i] = (short) (perm[i] % 12);
}
}
// Skewing and unskewing factors for 2, 3, and 4 dimensions
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 = 1.0/3.0;
// private static final double G3 = 1.0/6.0;
// 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;
/**
* Deactivate constructor
*/
private SimplexNoise() {
}
// This method is a *lot* faster than using (int)Math.floor(x)
private static int fastfloor(double x) {
int xi = (int) x;
return x < xi ? xi - 1 : xi;
}
private static double dot(Grad g, double x, double y) {
return g.x * x + g.y * y;
}
// private static double dot(Grad g, double x, double y, double z) {
// return g.x*x + g.y*y + g.z*z; }
//
// private static double dot(Grad g, double x, double y, double z, double w) {
// return g.x*x + g.y*y + g.z*z + g.w*w; }
// 2D simplex noise
public static double noise(double xin, double yin) {
double n0, n1, n2; // Noise contributions from the three corners
// Skew the input space to determine which simplex cell we're in
double s = (xin + yin) * F2; // Hairy factor for 2D
int i = fastfloor(xin + s);
int j = fastfloor(yin + s);
double t = (i + j) * G2;
double originX0 = i - t; // Unskew the cell origin back to (x,y) space
double originY0 = j - t;
double x0 = xin - originX0; // The x,y distances from the cell origin
double y0 = yin - originY0;
// For the 2D case, the simplex shape is an equilateral triangle.
// Determine which simplex we are in.
int i1, j1; // Offsets for second (middle) corner of simplex in (i,j) coords
if (x0 > y0) {
i1 = 1;
j1 = 0;
} else {
// lower triangle, XY order: (0,0)->(1,0)->(1,1)
i1 = 0;
j1 = 1;
} // upper triangle, YX order: (0,0)->(0,1)->(1,1)
// A step of (1,0) in (i,j) means a step of (1-c,-c) in (x,y), and
// a step of (0,1) in (i,j) means a step of (-c,1-c) in (x,y), where
// c = (3-sqrt(3))/6
double x1 = x0 - i1 + G2; // Offsets for middle corner in (x,y) unskewed coords
double y1 = y0 - j1 + G2;
double x2 = x0 - 1.0 + 2.0 * G2; // Offsets for last corner in (x,y) unskewed coords
double y2 = y0 - 1.0 + 2.0 * G2;
// Work out the hashed gradient indices of the three simplex corners
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]];
// Calculate the contribution from the three corners
double t0 = 0.5 - x0 * x0 - y0 * y0;
if (t0 < 0) {
n0 = 0.0;
} else {
t0 *= t0;
n0 = t0 * t0 * dot(grad3[gi0], x0, y0); // (x,y) of grad3 used for 2D gradient
}
double t1 = 0.5 - x1 * x1 - y1 * y1;
if (t1 < 0) {
n1 = 0.0;
} else {
t1 *= t1;
n1 = t1 * t1 * dot(grad3[gi1], x1, y1);
}
double t2 = 0.5 - x2 * x2 - y2 * y2;
if (t2 < 0) {
n2 = 0.0;
} else {
t2 *= t2;
n2 = t2 * t2 * dot(grad3[gi2], x2, y2);
}
// Add contributions from each corner to get the final noise value.
// The result is scaled to return values in the interval [-1,1].
return 70.0 * (n0 + n1 + n2);
}
/*
*
* // 3D simplex noise public static double noise(double xin, double yin, double zin) { double n0, n1, n2, n3; // Noise contributions from the four corners
* // Skew the input space to determine which simplex cell we're in double s = (xin+yin+zin)*F3; // Very nice and simple skew factor for 3D int i =
* fastfloor(xin+s); int j = fastfloor(yin+s); int k = fastfloor(zin+s); double t = (i+j+k)*G3; double X0 = i-t; // Unskew the cell origin back to (x,y,z)
* space double Y0 = j-t; double Z0 = k-t; double x0 = xin-X0; // The x,y,z distances from the cell origin double y0 = yin-Y0; double z0 = zin-Z0; // For
* the 3D case, the simplex shape is a slightly irregular tetrahedron. // Determine which simplex we are in. int i1, j1, k1; // Offsets for second corner of
* simplex in (i,j,k) coords int i2, j2, k2; // Offsets for third corner of simplex in (i,j,k) coords if(x0>=y0) { if(y0>=z0) { i1=1; j1=0; k1=0; i2=1;
* j2=1; k2=0; } // X Y Z order else if(x0>=z0) { i1=1; j1=0; k1=0; i2=1; j2=0; k2=1; } // X Z Y order else { i1=0; j1=0; k1=1; i2=1; j2=0; k2=1; } // Z X Y
* order } else { // x0<y0 if(y0<z0) { i1=0; j1=0; k1=1; i2=0; j2=1; k2=1; } // Z Y X order else if(x0<z0) { i1=0; j1=1; k1=0; i2=0; j2=1; k2=1; } // Y Z X
* order else { i1=0; j1=1; k1=0; i2=1; j2=1; k2=0; } // Y X Z order } // A step of (1,0,0) in (i,j,k) means a step of (1-c,-c,-c) in (x,y,z), // a step of
* (0,1,0) in (i,j,k) means a step of (-c,1-c,-c) in (x,y,z), and // a step of (0,0,1) in (i,j,k) means a step of (-c,-c,1-c) in (x,y,z), where // c = 1/6.
* double x1 = x0 - i1 + G3; // Offsets for second corner in (x,y,z) coords double y1 = y0 - j1 + G3; double z1 = z0 - k1 + G3; double x2 = x0 - i2 +
* 2.0*G3; // Offsets for third corner in (x,y,z) coords double y2 = y0 - j2 + 2.0*G3; double z2 = z0 - k2 + 2.0*G3; double x3 = x0 - 1.0 + 3.0*G3; //
* Offsets for last corner in (x,y,z) coords double y3 = y0 - 1.0 + 3.0*G3; double z3 = z0 - 1.0 + 3.0*G3; // Work out the hashed gradient indices of the
* four simplex corners 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]]]; //
* Calculate the contribution from the four corners double t0 = 0.6 - x0*x0 - y0*y0 - z0*z0; if(t0<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; if(t1<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; if(t2<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; if(t3<0) n3 = 0.0; else { t3 *= t3; n3 = t3 * t3 * dot(grad3[gi3], x3, y3, z3); } // Add contributions from each corner to get the final
* noise value. // The result is scaled to stay just inside [-1,1] return 32.0*(n0 + n1 + n2 + n3); }
*
*
* // 4D simplex noise, better simplex rank ordering method 2012-03-09 public static double noise(double x, double y, double z, double w) {
*
* double n0, n1, n2, n3, n4; // Noise contributions from the five corners // Skew the (x,y,z,w) space to determine which cell of 24 simplices we're in
* double s = (x + y + z + w) * F4; // Factor for 4D skewing int i = fastfloor(x + s); int j = fastfloor(y + s); int k = fastfloor(z + s); int l =
* fastfloor(w + s); double t = (i + j + k + l) * G4; // Factor for 4D unskewing double X0 = i - t; // Unskew the cell origin back to (x,y,z,w) space double
* Y0 = j - t; double Z0 = k - t; double W0 = l - t; double x0 = x - X0; // The x,y,z,w distances from the cell origin double y0 = y - Y0; double z0 = z -
* Z0; double w0 = w - W0; // For the 4D case, the simplex is a 4D shape I won't even try to describe. // To find out which of the 24 possible simplices
* we're in, we need to // determine the magnitude ordering of x0, y0, z0 and w0. // Six pair-wise comparisons are performed between each possible pair //
* of the four coordinates, and the results are used to rank the numbers. 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, j1, k1, l1; // The integer offsets for the second simplex corner int i2, j2, k2, l2; // The integer offsets
* for the third simplex corner int i3, j3, k3, l3; // The integer offsets for the fourth simplex corner // simplex[c] is a 4-vector with the numbers 0, 1,
* 2 and 3 in some order. // Many values of c will never occur, since e.g. x>y>z>w makes x<z, y<w and x<w // impossible. Only the 24 indices which have
* non-zero entries make any sense. // We use a thresholding to set the coordinates in turn from the largest magnitude. // Rank 3 denotes the largest
* coordinate. i1 = rankx >= 3 ? 1 : 0; j1 = ranky >= 3 ? 1 : 0; k1 = rankz >= 3 ? 1 : 0; l1 = rankw >= 3 ? 1 : 0; // Rank 2 denotes the second largest
* coordinate. i2 = rankx >= 2 ? 1 : 0; j2 = ranky >= 2 ? 1 : 0; k2 = rankz >= 2 ? 1 : 0; l2 = rankw >= 2 ? 1 : 0; // Rank 1 denotes the second smallest
* coordinate. i3 = rankx >= 1 ? 1 : 0; j3 = ranky >= 1 ? 1 : 0; k3 = rankz >= 1 ? 1 : 0; l3 = rankw >= 1 ? 1 : 0; // The fifth corner has all coordinate
* offsets = 1, so no need to compute that. double x1 = x0 - i1 + G4; // Offsets for second corner in (x,y,z,w) coords double y1 = y0 - j1 + G4; double z1 =
* z0 - k1 + G4; double w1 = w0 - l1 + G4; double x2 = x0 - i2 + 2.0*G4; // Offsets for third corner in (x,y,z,w) coords double y2 = y0 - j2 + 2.0*G4;
* double z2 = z0 - k2 + 2.0*G4; double w2 = w0 - l2 + 2.0*G4; double x3 = x0 - i3 + 3.0*G4; // Offsets for fourth corner in (x,y,z,w) coords double y3 = y0
* - j3 + 3.0*G4; double z3 = z0 - k3 + 3.0*G4; double w3 = w0 - l3 + 3.0*G4; double x4 = x0 - 1.0 + 4.0*G4; // Offsets for last corner in (x,y,z,w) coords
* double y4 = y0 - 1.0 + 4.0*G4; double z4 = z0 - 1.0 + 4.0*G4; double w4 = w0 - 1.0 + 4.0*G4; // Work out the hashed gradient indices of the five simplex
* corners 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; // Calculate the contribution from the
* five corners double t0 = 0.6 - x0*x0 - y0*y0 - z0*z0 - w0*w0; if(t0<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; if(t1<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; if(t2<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; if(t3<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;
* if(t4<0) n4 = 0.0; else { t4 *= t4; n4 = t4 * t4 * dot(grad4[gi4], x4, y4, z4, w4); } // Sum up and scale the result to cover the range [-1,1] return
* 27.0 * (n0 + n1 + n2 + n3 + n4); }
*/
// Inner class to speed upp gradient computations
// (array access is a lot slower than member access)
private static class Grad {
double x, y, z, 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;
}
}
}