Map block

src/engine/voxel/index.js

@@ -1,5 +1,5 @@
 import { Mesh } from '../mesh'
-import { MeshInstance } from '../components'
+import { Node, MeshInstance } from '../components'
 import { addv3 } from '../utility'
 
 const FACE_VERTEX = [
@@ -74,8 +74,9 @@ const AIR_VOXEL = new Voxel(0)
 const GROUND_VOXEL = new Voxel(1)
 
 class VoxelChunk extends MeshInstance {
-  constructor (pos, size = 16) {
+  constructor (origin, pos, size = 16) {
-    super(null, pos)
+    super(null, [origin[0] + pos[0] * size, origin[1] + pos[1] * size, origin[2] + pos[2] * size])
+    this.relativePos = pos
     this.size = size
     this.mesh = null
 
@@ -90,24 +91,77 @@ class VoxelChunk extends MeshInstance {
   }
 
   getVoxel (x, y, z) {
-    if (x < 0 || x >= this.size || y < 0 || y >= this.size || z < 0 || z >= this.size) return AIR_VOXEL
+    if (this.parent) {
-    return this.data[x][y][z]
+      let neighbor
+      if (x < 0) {
+        neighbor = this.parent.getChunk(this.relativePos[0] - 1, this.relativePos[1], this.relativePos[2])
+        if (neighbor) {
+          return neighbor.getVoxel(this.size + x, y, z)
+        }
+        return AIR_VOXEL
+      } else if (x >= this.size) {
+        neighbor = this.parent.getChunk(this.relativePos[0] + 1, this.relativePos[1], this.relativePos[2])
+        if (neighbor) {
+          return neighbor.getVoxel(x - this.size, y, z)
+        }
+        return AIR_VOXEL
+      } else if (y < 0) {
+        neighbor = this.parent.getChunk(this.relativePos[0], this.relativePos[1] - 1, this.relativePos[2])
+        if (neighbor) {
+          return neighbor.getVoxel(x, this.size + y, z)
+        }
+        return AIR_VOXEL
+      } else if (y >= this.size) {
+        neighbor = this.parent.getChunk(this.relativePos[0], this.relativePos[1] + 1, this.relativePos[2])
+        if (neighbor) {
+          return neighbor.getVoxel(x, y - this.size, z)
+        }
+        return AIR_VOXEL
+      } else if (z < 0) {
+        neighbor = this.parent.getChunk(this.relativePos[0], this.relativePos[1], this.relativePos[2] - 1)
+        if (neighbor) {
+          return neighbor.getVoxel(x, y, this.size + z)
+        }
+        return AIR_VOXEL
+      } else if (z >= this.size) {
+        neighbor = this.parent.getChunk(this.relativePos[0], this.relativePos[1], this.relativePos[2] + 1)
+        if (neighbor) {
+          return neighbor.getVoxel(x, y, z - this.size)
+        }
+        return AIR_VOXEL
+      }
+    }
+
+    return this.data[x][z][y]
+  }
+
+  getVoxelv (v) {
+    return this.getVoxel(v[0], v[1], v[2])
   }
 
   generate (generator) {
     this.data = {}
     for (let x = 0; x < this.size; x++) {
       if (!this.data[x]) this.data[x] = {}
-      for (let y = 0; y < this.size; y++) {
+      for (let z = 0; z < this.size; z++) {
-        if (!this.data[x][y]) this.data[x][y] = {}
+        if (!this.data[x][z]) this.data[x][z] = {}
-        for (let z = 0; z < this.size; z++) {
+        let columnHeight = generator.getHeight(x + this.pos[0], z + this.pos[2])
-          if (!this.data[x][y][z]) this.data[x][y][z] = {}
+        for (let y = 0; y < this.size; y++) {
-          let solid = y < (generator.getHeight(x + this.pos[0], z + this.pos[2]) + 10)
+          let solid = this.pos[1] + y < columnHeight
-          this.data[x][y][z] = solid ? GROUND_VOXEL : AIR_VOXEL
+          this.data[x][z][y] = solid ? GROUND_VOXEL : AIR_VOXEL
         }
       }
     }
+
     this.generated = true
+
+    // Make sure the parent knows that we have generated everything
+    if (this.parent) {
+      this.parent.chunksLeft--
+      if (this.parent.chunksLeft <= 0) {
+        this.parent.generated = true
+      }
+    }
   }
 
   // Programmatically generate a voxel face
@@ -138,7 +192,7 @@ class VoxelChunk extends MeshInstance {
     this.dirty = false
 
     // If there is no generated chunk, we have nothing to base a mesh off of
-    if (!this.generated) return
+    if (!this.generated) return false
 
     // If there already exists a mesh, dispose of it
     if (this.mesh) {
@@ -184,7 +238,7 @@ class VoxelChunk extends MeshInstance {
 
     // Do not create a mesh when there are no faces in this chunk
     if (points.length === 0) {
-      return
+      return false
     }
 
     // Flatten the points array to three separate arrays
@@ -206,13 +260,108 @@ class VoxelChunk extends MeshInstance {
     // Create a new mesh without an element array buffer (TODO maybe?)
     this.mesh = Mesh.construct(gl, vertices, null, uvs, normals)
 
-    // TODO: Temporary..
     if (this.material) this.mesh.material = this.material
+
+    return true
   }
 
   update (gl, dt) {
     if (this.dirty) return this.createMesh(gl)
+    return false
+  }
+
+  destroy (gl) {
+    this.generated = false
+    this.mesh && this.mesh.dispose(gl)
+    this.data = {}
   }
 }
 
-export { Voxel, VoxelChunk }
+class VoxelMapBlock extends Node {
+  constructor (pos, chunkSize = 16, size = 8) {
+    super(pos)
+    this.chunkSize = chunkSize
+    this.size = size
+    this.chunks = {}
+    this.generated = false
+    this.chunksLeft = size * size * size
+  }
+
+  getChunk (x, y, z) {
+    if (x < 0 || x >= this.size || y < 0 || y >= this.size || z < 0 || z >= this.size) return null
+    return this.chunks[x][z][y]
+  }
+
+  getChunkv (v) {
+    return this.getChunk(v[0], v[1], v[2])
+  }
+
+  generate (generator) {
+    this.chunks = {}
+    for (let x = 0; x < this.size; x++) {
+      if (!this.chunks[x]) this.chunks[x] = {}
+      for (let z = 0; z < this.size; z++) {
+        if (!this.chunks[x][z]) this.chunks[x][z] = {}
+        for (let y = 0; y < this.size; y++) {
+          if (this.chunks[x][z][y]) continue
+          let chunk = new VoxelChunk(this.pos, [x, y, z], this.chunkSize)
+          this.chunks[x][z][y] = chunk
+          this.addChild(chunk)
+          generator.pushChunk(chunk)
+        }
+      }
+    }
+  }
+
+  destroy (gl) {
+    this.generated = false
+    for (let i in this.children) {
+      let ch = this.children[i]
+      if (!(ch instanceof VoxelChunk)) continue
+      ch.destroy(gl)
+    }
+    this.children = []
+    this.chunks = {}
+  }
+
+  update (gl, dt) {
+    if (!this.generated) return
+    for (let i in this.children) {
+      let ch = this.children[i]
+      if (!(ch instanceof VoxelChunk)) continue
+      if (ch.update(gl, dt)) break
+    }
+  }
+}
+
+class VoxelGenerator {
+  constructor (noise, material, groundHeight = 64) {
+    this.material = material
+    this.noise = noise
+    this.groundHeight = groundHeight
+    this.generateQueue = []
+  }
+
+  // Push a chunk into the generation queue
+  pushChunk (chunk) {
+    this.generateQueue.push(chunk)
+  }
+
+  // Get chunk height
+  getHeight (x, z) {
+    return this.noise.getHeight(x, z) + this.groundHeight
+  }
+
+  // Generate chunks in the queue
+  update (dt) {
+    for (let i in this.generateQueue) {
+      let chunk = this.generateQueue[i]
+      if (chunk.generated) continue
+
+      chunk.material = this.material
+      chunk.generate(this)
+    }
+  }
+}
+
+export { VoxelGenerator, Voxel, VoxelChunk, VoxelMapBlock }

src/index.js

@@ -13,7 +13,7 @@ import { SimplexHeightMap } from './engine/components/terrain/heightmap'
 import { Material, Texture } from './engine/mesh/material'
 import { GUIRenderer, GUIImage, Dim4 } from './engine/gui'
 import { FontRenderer, GUIText, Font } from './engine/gui/font'
-import { VoxelChunk } from './engine/voxel'
+import { VoxelMapBlock, VoxelGenerator } from './engine/voxel'
 
 let game = Engine
 let env = new Environment()
@@ -87,9 +87,9 @@ async function pipeline () {
   await skybox.initialize(game.gl)
 
   // Voxel test
-  let chunk = new VoxelChunk([0.0, 0.0, 0.0])
+  let voxgen = new VoxelGenerator(hmap, material)
-  chunk.generate(hmap)
+  let block = new VoxelMapBlock([0.0, 0.0, 0.0])
-  chunk.material = material
+  block.generate(voxgen)
 
   // Update function for camera and terrain
   let fpsTimer = 0
@@ -132,7 +132,8 @@ async function pipeline () {
     // waterRenderer.update(dt)
 
     // Update voxel chunk
-    chunk.update(game.gl, dt)
+    voxgen.update(dt)
+    block.update(game.gl, dt)
 
     // Set text to FPS
     fpsTimer++
@@ -160,7 +161,7 @@ async function pipeline () {
 
     // entity.draw(gl, terrainShader)
 
-    chunk.draw(gl, terrainShader)
+    block.draw(gl, terrainShader)
   }
 
   // Render function for the triangle