split worldgen

Sources/Voxelotl/World.swift

@@ -2,11 +2,11 @@ import Foundation
 
 public class World {
   private var _chunks: Dictionary<SIMD3<Int>, Chunk>
-  private var noise: ImprovedPerlin<Float>!
-  private var noise2: SimplexNoise<Float>!
+  private var _generator: WorldGenerator
 
   public init() {
     self._chunks = [:]
+    self._generator = WorldGenerator()
   }
 
   func getBlock(at position: SIMD3<Int>) -> Block {
@@ -19,40 +19,21 @@ public class World {
     self._chunks[position &>> Chunk.shift]?.setBlock(at: position, type: type)
   }
 
-  func generate(width: Int, height: Int, depth: Int, random: inout any RandomProvider) {
-    self.noise = ImprovedPerlin<Float>(random: &random)
-    self.noise2 = SimplexNoise<Float>(random: &random)
-
-    for x in 0..<width {
+  func generate(width: Int, height: Int, depth: Int, seed: UInt64) {
+    self._generator.reset(seed: seed)
+    let orig = SIMD3(width, height, depth) / 2
+    for z in 0..<depth {
       for y in 0..<height {
-        for z in 0..<depth {
-          let chunkID = SIMD3(x, y, z) &- SIMD3(width, height, depth) / 2
-          self.generate(chunkID: chunkID)
+        for x in 0..<width {
+          let chunkID = SIMD3(x, y, z) &- orig
+          self._chunks[chunkID] = self._generator.makeChunk(id: chunkID)
         }
       }
     }
   }
 
   func generate(chunkID: SIMD3<Int>) {
-    let chunkOrigin = chunkID &<< Chunk.shift
-    var chunk = Chunk(position: chunkOrigin)
-    chunk.fill(allBy: { position in
-      let fpos = SIMD3<Float>(position)
-        let threshold: Float = 0.6
-        let value = fpos.y / Float(Chunk.size)
-          + self.noise.get(fpos * 0.05) * 1.1
-          + self.noise.get(fpos * 0.10) * 0.5
-          + self.noise.get(fpos * 0.30) * 0.23
-      return if value < threshold {
-        .solid(.init(
-          hue:        Float16(180 + self.noise2.get(fpos * 0.05) * 180),
-          saturation: Float16(0.5 + self.noise2.get(SIMD4(fpos * 0.05, 4)) * 0.5),
-          value:      Float16(0.5 + self.noise2.get(SIMD4(fpos * 0.05, 9)) * 0.5).lerp(0.5, 1)).linear)
-      } else {
-        .air
-      }
-    })
-    self._chunks[chunkID] = chunk
+    self._chunks[chunkID] = self._generator.makeChunk(id: chunkID)
   }
 
   var instances: [Instance] {