initial voxel implementation

Sources/Voxelotl/CMakeLists.txt

@@ -3,6 +3,8 @@ add_executable(Voxelotl MACOSX_BUNDLE
 
   test.png
 
+  Chunk.swift
+
   shadertypes.h
   shader.metal
 

Sources/Voxelotl/Chunk.swift

@@ -0,0 +1,57 @@
+public struct Chunk {
+  public static let chunkSize: Int = 16
+  
+  public let position: SIMD3<Int>
+  private var blocks: [Block]
+  
+  init(position: SIMD3<Int>, blocks: [Block]) {
+    self.position = position
+    self.blocks = blocks
+  }
+  
+  init(position: SIMD3<Int>) {
+    self.position = position
+    self.blocks = Array(
+      repeating: BlockType.air,
+      count: Chunk.chunkSize * Chunk.chunkSize * Chunk.chunkSize
+    ).map { type in Block(type) }
+  }
+
+  func getBlockInternally(at position: SIMD3<Int>) -> Block {
+    blocks[position.x + position.y * Chunk.chunkSize + position.z * Chunk.chunkSize * Chunk.chunkSize]
+  }
+  
+  mutating func setBlockInternally(at position: SIMD3<Int>, type: BlockType) {
+    blocks[position.x + position.y * Chunk.chunkSize + position.z * Chunk.chunkSize * Chunk.chunkSize].type = type
+  }
+  
+  mutating func fill(allBy calculation: () -> BlockType) {
+    blocks.indices.forEach { i in
+      blocks[i].type = calculation()
+    }
+  }
+  
+  func forEach(block perform: (SIMD3<Int>, Block) -> Void) {
+    for x in 0..<Chunk.chunkSize {
+      for y in 0..<Chunk.chunkSize {
+        for z in 0..<Chunk.chunkSize {
+          perform(SIMD3(x, y, z), blocks[x + y * Chunk.chunkSize + z * Chunk.chunkSize * Chunk.chunkSize])
+        }
+      }
+    }
+  }
+}
+
+public enum BlockType: Equatable {
+  case air
+  case solid(Color<Float16>)
+}
+
+public struct Block {
+  public var type: BlockType
+  
+  
+  public init(_ type: BlockType) {
+    self.type = type
+  }
+}

Sources/Voxelotl/Game.swift

@@ -1,4 +1,5 @@
 import simd
+import Foundation
 
 struct Box {
   var geometry: AABB
@@ -24,26 +25,54 @@ struct Instance {
   }
 }
 
-let boxes: [Box] = [
-  Box(geometry: .fromUnitCube(
-    position: .init( 0,  -1,  0) * 2,
-    scale:    .init(10, 0.1, 10) * 2)),
-  Box(geometry: .fromUnitCube(
-    position: .init(-2.5, 0, -3) * 2,
-    scale:    .init(repeating: 2)),
-    color:    .init(rgb888: 0xFF80BF).linear),
-  Box(geometry: .fromUnitCube(
-    position: .init(-2.5, -0.5, -5) * 2,
-    scale:    .init(repeating: 2)),
-    color:    .init(rgb888: 0xBFFFFF).linear)
-]
-
 class Game: GameDelegate {
   private var fpsCalculator = FPSCalculator()
-  var camera = Camera(fov: 60, size: .one, range: 0.06...50)
+  var camera = Camera(fov: 60, size: .one, range: 0.06...900)
   var player = Player()
   var projection: matrix_float4x4 = .identity
 
+  var boxes: [Box] = []
+  
+  init() {
+    var chunk = Chunk(position: .zero)
+    let options: [BlockType] = [
+      .air,
+      .solid(.blue),
+      .air,
+      .solid(.red),
+      .air,
+      .solid(.green),
+      .air,
+      .solid(.white),
+      .air,
+      .solid(.cyan),
+      .air,
+      .solid(.yellow),
+      .air,
+      .solid(.magenta),
+      .air,
+    ]
+    chunk
+      .fill(allBy: { options[Int(arc4random_uniform(UInt32(options.count)))] })
+    chunk.forEach { position, block in
+      if block.type == .air {
+        return
+      }
+      
+      if case let .solid(color) = block.type {
+        boxes
+          .append(
+            Box(
+              geometry:
+                  .fromUnitCube(position: SIMD3<Float>(position) + 0.5, scale: .init(repeating: 0.5)),
+              color: color
+            )
+          )
+      }
+    }
+    player.position = SIMD3(0.5, Float(Chunk.chunkSize) + 0.5, 0.5)
+  }
+  
   func fixedUpdate(_ time: GameTime) {
     
   }
@@ -74,7 +103,7 @@ class Game: GameDelegate {
     }
     instances.append(
       Instance(
-        position: .init(0, sin(totalTime * 1.5 * cubeSpeedMul) * 0.5, -2) * 2,
+        position: .init(0, sin(totalTime * 1.5 * cubeSpeedMul) * 0.5, 0) * 2,
         scale:    .init(repeating: 0.5),
         rotation: .init(angle: totalTime * 3.0 * cubeSpeedMul, axis: .init(0, 1, 0)),
         color:    .init(r: 0.5, g: 0.5, b: 1).linear))

Sources/Voxelotl/Player.swift

@@ -20,7 +20,9 @@ struct Player {
 
   private var _onGround: Bool = false
 
-  public var position: SIMD3<Float> { self._position + .init(0, Self.eyeLevel, 0) }
+  public var position: SIMD3<Float> {
+    get { self._position + .init(0, Self.eyeLevel, 0) } set { self._position = newValue }
+  }
   public var rotation: SIMD2<Float> { self._rotation }
 
   mutating func update(deltaTime: Float, boxes: [Box]) {
@@ -36,13 +38,18 @@ struct Player {
       }
       self._rotation.y = self._rotation.y.clamp(-.pi * 0.5, .pi * 0.5)
 
-      if self._onGround {
-        // Movement on ground
+      // Movement (slower in air than on ground)
       let movement = pad.leftStick.cardinalDeadzone(min: 0.1, max: 1)
       let rotc = cos(self._rotation.x), rots = sin(self._rotation.x)
-        self._velocity.x = (movement.x * rotc - movement.y * rots) * Self.accelerationCoeff
-        self._velocity.z = (movement.y * rotc + movement.x * rots) * Self.accelerationCoeff
+      let movementScale: Float = self._onGround ? 1.0 : 0.4
+      self._velocity.x = (
+        movement.x * rotc - movement.y * rots
+      ) * Self.accelerationCoeff * movementScale
+      self._velocity.z = (
+        movement.y * rotc + movement.x * rots
+      ) * Self.accelerationCoeff * movementScale
 
+      if self._onGround {
         // Jumping
         if pad.pressed(.east) {
           self._velocity.y = Self.jumpVelocity
@@ -50,8 +57,8 @@ struct Player {
         }
       }
       
-      // Flying
-      self._velocity.y += pad.rightTrigger * 36 * deltaTime
+      // Flying and unflying
+      self._velocity.y += (pad.rightTrigger - pad.leftTrigger) * 36 * deltaTime
 
       // Reset
       if pad.pressed(.back) {
@@ -112,5 +119,17 @@ struct Player {
       self._velocity.x = 0
       self._velocity.z = 0
     }
+    
+    if self._velocity.x > 10 {
+      self._velocity.x = 10
+    }
+    
+    if self._velocity.y > 10 {
+      self._velocity.y = 10
+    }
+
+    if abs(self._velocity.y) > 40 {
+      self._velocity.y = Float(signOf: self._velocity.y, magnitudeOf: 40.0)
+    }
   }
 }