From 180aad05decc7eefa87e4e45d6747c48f40e5361 Mon Sep 17 00:00:00 2001
From: Tyler Murphy <tylerm@tylerm.dev>
Date: Mon, 17 Apr 2023 12:12:01 -0400
Subject: save

---
 .../tylermurphy/Minecraft/Gen/WorldGenerator.java  | 112 +++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100755 src/main/java/net/tylermurphy/Minecraft/Gen/WorldGenerator.java

(limited to 'src/main/java/net/tylermurphy/Minecraft/Gen/WorldGenerator.java')

diff --git a/src/main/java/net/tylermurphy/Minecraft/Gen/WorldGenerator.java b/src/main/java/net/tylermurphy/Minecraft/Gen/WorldGenerator.java
new file mode 100755
index 0000000..b912ccd
--- /dev/null
+++ b/src/main/java/net/tylermurphy/Minecraft/Gen/WorldGenerator.java
@@ -0,0 +1,112 @@
+package net.tylermurphy.Minecraft.Gen;
+
+import net.tylermurphy.Minecraft.Chunk.Chunk;
+import net.tylermurphy.Minecraft.Chunk.PerlinNoise;
+import net.tylermurphy.Minecraft.Scene.World;
+
+public class WorldGenerator {
+
+	private static int OCTAVES = 2;
+	private static int AMPLITUDE = 10;
+	private static int ROUGHNESS = 3;
+
+	public static int generateHeight(int x, int z) {
+		float total = 0;
+		float d = (float) Math.pow(2, OCTAVES-1);
+		for(int i=0;i<OCTAVES;i++){
+			float freq = (float) (Math.pow(2, i) / d);
+			float amp = (float) Math.pow(ROUGHNESS, i) * AMPLITUDE;
+			total += getInterpolatedNoise((x)*freq, (z)*freq) * amp;
+		}
+		return (int) total+100;
+	}
+
+	private static float interpolate(float a, float b, float blend){
+		double theta = blend * Math.PI;
+		float f = (float)(1f - Math.cos(theta)) * 0.5f;
+		return a * (1f - f) + b * f;
+	}
+
+	private static float getInterpolatedNoise(float x, float z){
+		int intX = (int) x;
+		int intZ = (int) z;
+		float fracX = x - intX;
+		float fracZ = z - intZ;
+
+		float v1 = (float) PerlinNoise.getNoise(World.seed, intX, intZ);
+		float v2 = (float) PerlinNoise.getNoise(World.seed, intX + 1, intZ);
+		float v3 = (float) PerlinNoise.getNoise(World.seed, intX, intZ + 1);
+		float v4 = (float) PerlinNoise.getNoise(World.seed, intX + 1, intZ + 1);
+		float i1 = interpolate(v1, v2, fracX);
+		float i2 = interpolate(v3, v4, fracX);
+		return interpolate(i1, i2, fracZ);
+	}
+
+	private static void generateLandscape(Chunk c) {
+		for(int x=0;x<16;x++) {
+			for(int z=0;z<16;z++) {
+				int top = generateHeight(c.gridX*16+x, c.gridZ*16+z);
+				for(int y=0;y<256;y++) {
+					if(top<=95) {
+						if(y < top) c.cubes[x][y][z] = 14;
+						else if(y == top) c.cubes[x][y][z] = 13;
+						else if(y <= 90) c.cubes[x][y][z] = 17;
+						else c.cubes[x][y][z] = -1;
+					} else {
+						if(y < top - 90) c.cubes[x][y][z] = 2;
+						else if(y < top) c.cubes[x][y][z] = 1;
+						else if(y == top) c.cubes[x][y][z] = 0;
+						else c.cubes[x][y][z] = -1;
+					}
+				}
+			}
+		}
+	}
+
+	private static void generateNature(Chunk c) {
+		for(int x=0;x<16;x++) {
+			for(int z=0;z<16;z++) {
+				int top = generateHeight(c.gridX*16+x, c.gridZ*16+z);
+				double n1 = PerlinNoise.getNoise(c.chunk_seed, x*2+z, z/2-x,PerlinNoise.NoiseType.WhiteNoise);
+				double n2 = PerlinNoise.getNoise(c.chunk_seed, z*5-z*2, x/4+6-x*5,PerlinNoise.NoiseType.WhiteNoise);
+				double n3 = PerlinNoise.getNoise(c.chunk_seed, x/5+17, z/14,PerlinNoise.NoiseType.WhiteNoise);
+				double n4 = PerlinNoise.getNoise(c.chunk_seed, z+5, (int)Math.pow(x,2),PerlinNoise.NoiseType.WhiteNoise);
+				if(top<=95) {
+					if(n1*n2/n3*n4>2 && top > 90) {
+						c.cubes[x][top+1][z] = 15;
+						c.cubes[x][top+2][z] = 15;
+						c.cubes[x][top+3][z] = 15;
+					}
+				} else {
+					if(n1*n2/n4*n3>2 && top > 90) {
+						if(x < 1 || x > 14 || z < 1 || z > 14) continue;
+						c.cubes[x][top+1][z] = 10;
+						c.cubes[x][top+2][z] = 10;
+						c.cubes[x][top+3][z] = 10;
+
+						c.cubes[x-1][top+3][z] = 12;
+						c.cubes[x-1][top+3][z+1] = 12;
+						c.cubes[x][top+3][z+1] = 12;
+						c.cubes[x+1][top+3][z+1] = 12;
+						c.cubes[x+1][top+3][z] = 12;
+						c.cubes[x+1][top+3][z-1] = 12;
+						c.cubes[x][top+3][z-1] = 12;
+						c.cubes[x-1][top+3][z-1] = 12;
+
+						c.cubes[x+1][top+4][z] = 12;
+						c.cubes[x-1][top+4][z] = 12;
+						c.cubes[x][top+4][z+1] = 12;
+						c.cubes[x][top+4][z-1] = 12;
+						c.cubes[x][top+4][z] = 12;
+					}
+				}
+			}
+		}
+	}
+
+	public static void generate(Chunk c) {
+		generateLandscape(c);
+		generateNature(c);
+	}
+	
+}
-- 
cgit v1.2.3-freya