Fixes

src/main/java/ru/betterend/noise/VoronoiNoise.java

@@ -0,0 +1,59 @@
+package ru.betterend.noise;
+
+import java.util.Random;
+
+import net.minecraft.util.math.MathHelper;
+import ru.betterend.util.MHelper;
+
+public class VoronoiNoise {
+	private static final Random RANDOM = new Random();
+	final int seed;
+	final double scale;
+	final double separation;
+
+	public VoronoiNoise(int seed, double side, double separation) {
+		this.seed = seed;
+		this.scale = 1.0 / side;
+		this.separation = MathHelper.clamp(separation, 0, 1);
+	}
+	
+	private int getSeed(int x, int y, int z) {
+		int h = seed + x * 374761393 + y * 668265263 + z;
+		h = (h ^ (h >> 13)) * 1274126177;
+		return h ^ (h >> 16);
+	}
+	
+	public double sample(float x, float y, float z) {
+		return sample(MHelper.floor(x), MHelper.floor(y), MHelper.floor(z));
+	}
+
+	public double sample(int x, int y, int z) {
+		double posX = x * scale;
+		double posY = y * scale;
+		double posZ = z * scale;
+		int posXI = MHelper.floor(posX);
+		int posYI = MHelper.floor(posY);
+		int posZI = MHelper.floor(posZ);
+		double distance = Double.MAX_VALUE;
+		for (int px = -1; px < 2; px++) {
+			double pointX = posXI + px;
+			for (int py = -1; py < 2; py++) {
+				double pointY = posYI + py;
+				for (int pz = -1; pz < 2; pz++) {
+					double pointZ = posZI + pz;
+					RANDOM.setSeed(getSeed(posXI + px, posYI + py, posZI + pz));
+					
+					double posXN = pointX + RANDOM.nextDouble() * separation;
+					double posYN = pointY + RANDOM.nextDouble() * separation;
+					double posZN = pointZ + RANDOM.nextDouble() * separation;
+					
+					double dist2 = MHelper.lengthSqr(posXN - posX, posYN - posY, posZN - posZ);
+					if (dist2 < distance) {
+						distance = dist2;
+					}
+				}
+			}
+		}
+		return distance;
+	}
+}