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some voxel bs

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This commit is contained in:
Evert Prants 2020-04-09 15:57:00 +03:00
parent f0a2eacd41
commit ab35890f1b
Signed by: evert
GPG Key ID: 1688DA83D222D0B5
5 changed files with 160 additions and 181 deletions
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2
src/engine/components/terrain/heightmap.js
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@ -83,7 +83,7 @@ class SimplexHeightMap extends HeightMap {
let amplitude = this.amplitude
for (let i = 0; i < o; i++) {
output += (amplitude * this.osn.noise3D(x * frequency, y * frequency))
output += (amplitude * this.osn.noise2D(x * frequency, y * frequency))
denom += amplitude
frequency *= this.lacunarity

14
src/engine/utility.js
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@ -8,6 +8,20 @@ export function clamp (num, min, max) {
return Math.min(Math.max(num, min), max)
}
export function dim3to1 (x, y, z, xMax, yMax) {
if (xMax && !yMax) yMax = xMax
return (z * xMax * yMax) + (y * xMax) + x
}
export function dim1to3 (idx, xMax, yMax) {
if (xMax && !yMax) yMax = xMax
const z = idx / (yMax * xMax)
idx -= (z * xMax * yMax)
const y = idx / xMax
const x = idx % xMax
return { x, y, z }
}
export function addv3 (one, two) {
if (one.length !== 3) return null
if (typeof two !== 'object') {

281
src/engine/voxel/index.js
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@ -1,6 +1,9 @@
import { Mesh } from '../mesh'
import { Node, MeshInstance } from '../components'
import { addv3, mulv3 } from '../utility'
import { vec3 } from 'gl-matrix'
import { addv3, subv3, mulv3, dim3to1, dim1to3 } from '../utility'
import { BoundingBox } from '../mesh/aabb'
import VoxelData from './voxeldata'
const FACE_VERTEX = [
// Bottom
@ -41,7 +44,7 @@ const FACE_VERTEX = [
[1.0, 1.0, 1.0],
[0.0, 1.0, 1.0],
[0.0, 0.0, 1.0],
[0.0, 0.0, 1.0]
[0.0, 0.0, -1.0]
],
// Back
[
@ -49,7 +52,7 @@ const FACE_VERTEX = [
[0.0, 1.0, 0.0],
[1.0, 1.0, 0.0],
[1.0, 0.0, 0.0],
[0.0, 0.0, -1.0]
[0.0, 0.0, 1.0]
]
]
@ -60,71 +63,65 @@ const FACE_RIGHT = 3
const FACE_FRONT = 4
const FACE_BACK = 5
class Voxel {
constructor (id) {
this.id = id
}
get solid () {
return this.id !== 0
}
}
const AIR_VOXEL = new Voxel(0)
const GROUND_VOXEL = new Voxel(1)
const AIR_VOXEL = VoxelData.register('air', { solid: false })
const GROUND_VOXEL = VoxelData.register('ground', { solid: true })
class VoxelChunk extends MeshInstance {
constructor (origin, pos, size = 16) {
super(null, [origin[0] + pos[0] * size, origin[1] + pos[1] * size, origin[2] + pos[2] * size])
constructor (world, pos, size = 16) {
super(null, [pos[0] * size, pos[1] * size, pos[2] * size])
this.world = world
this.relativePos = pos
this.size = size
this.mesh = null
// Voxel data
this.data = {}
this.data = []
// Set to true when this chunk mesh requires to be recreated
this.dirty = true
// Set to true when the generation has been finished
this.generated = false
// If the chunk is outside of the view, make it inactive
this.active = true
}
getVoxel (x, y, z) {
if (this.parent) {
if (this.world) {
let neighbor
if (x < 0) {
neighbor = this.parent.getChunk(this.relativePos[0] - 1, this.relativePos[1], this.relativePos[2])
neighbor = this.world.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])
neighbor = this.world.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])
neighbor = this.world.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])
neighbor = this.world.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)
neighbor = this.world.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)
neighbor = this.world.getChunk(this.relativePos[0], this.relativePos[1], this.relativePos[2] + 1)
if (neighbor) {
return neighbor.getVoxel(x, y, z - this.size)
}
@ -132,7 +129,7 @@ class VoxelChunk extends MeshInstance {
}
}
return this.data[x][z][y]
return this.data[dim3to1(x, y, z, this.size)] || AIR_VOXEL
}
getVoxelv (v) {
@ -140,33 +137,24 @@ class VoxelChunk extends MeshInstance {
}
generate (generator) {
this.data = {}
this.material = generator.material
for (let x = 0; x < this.size; x++) {
if (!this.data[x]) this.data[x] = {}
for (let z = 0; z < this.size; z++) {
if (!this.data[x][z]) this.data[x][z] = {}
const columnHeight = generator.getHeight(x + this.pos[0], z + this.pos[2])
for (let y = 0; y < this.size; y++) {
const solid = this.pos[1] + y < columnHeight
this.data[x][z][y] = solid ? GROUND_VOXEL : AIR_VOXEL
this.data[dim3to1(x, y, z, this.size)] = 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
}
}
return true
}
// Programmatically generate a voxel face
// Returns the position, normal and texture coordinates for each vertex in this face
createFace (points, pos, face) {
createFace (indices, points, pos, face) {
// Add the corresponding offsets for this face to the position
const corners = [
addv3(pos, FACE_VERTEX[face][0]), addv3(pos, FACE_VERTEX[face][1]),
@ -176,15 +164,22 @@ class VoxelChunk extends MeshInstance {
// Select the normal for this face
const normal = FACE_VERTEX[face][4]
// Return the 6 vertices that make up this face (two triangles)
// Create the 4 vertices that make up this face
// They're named points because this function returns not only vertices,
// but corresponding texture coordinates and normals at the same time for convenience
points.push([corners[0], normal, [0.0, 1.0]])
points.push([corners[1], normal, [0.0, 0.0]])
points.push([corners[2], normal, [1.0, 0.0]])
points.push([corners[0], normal, [0.0, 1.0]])
points.push([corners[2], normal, [1.0, 0.0]])
points.push([corners[3], normal, [1.0, 1.0]])
// Create the face
const inx = points.length - 4
indices.push(inx)
indices.push(inx + 1)
indices.push(inx + 2)
indices.push(inx)
indices.push(inx + 2)
indices.push(inx + 3)
}
createMesh (gl) {
@ -201,36 +196,37 @@ class VoxelChunk extends MeshInstance {
// Array of vertices with texture positions and normals
const points = []
const indices = []
// Generate face quads for each voxel in the chunk
for (let x = 0; x < this.size; x++) {
for (let y = 0; y < this.size; y++) {
for (let z = 0; z < this.size; z++) {
const cellPos = [x, y, z]
if (!this.getVoxel(x, y, z).solid) continue
if (!VoxelData.isSolid(this.getVoxel(x, y, z))) continue
if (!this.getVoxel(x, y - 1, z).solid) {
this.createFace(points, cellPos, FACE_BOTTOM)
if (!VoxelData.isSolid(this.getVoxel(x, y - 1, z))) {
this.createFace(indices, points, cellPos, FACE_BOTTOM)
}
if (!this.getVoxel(x, y + 1, z).solid) {
this.createFace(points, cellPos, FACE_TOP)
if (!VoxelData.isSolid(this.getVoxel(x, y + 1, z))) {
this.createFace(indices, points, cellPos, FACE_TOP)
}
if (!this.getVoxel(x - 1, y, z).solid) {
this.createFace(points, cellPos, FACE_LEFT)
if (!VoxelData.isSolid(this.getVoxel(x - 1, y, z))) {
this.createFace(indices, points, cellPos, FACE_LEFT)
}
if (!this.getVoxel(x + 1, y, z).solid) {
this.createFace(points, cellPos, FACE_RIGHT)
if (!VoxelData.isSolid(this.getVoxel(x + 1, y, z))) {
this.createFace(indices, points, cellPos, FACE_RIGHT)
}
if (!this.getVoxel(x, y, z + 1).solid) {
this.createFace(points, cellPos, FACE_FRONT)
if (!VoxelData.isSolid(this.getVoxel(x, y, z + 1))) {
this.createFace(indices, points, cellPos, FACE_FRONT)
}
if (!this.getVoxel(x, y, z - 1).solid) {
this.createFace(points, cellPos, FACE_BACK)
if (!VoxelData.isSolid(this.getVoxel(x, y, z - 1))) {
this.createFace(indices, points, cellPos, FACE_BACK)
}
}
}
@ -257,15 +253,21 @@ class VoxelChunk extends MeshInstance {
uvs.push(vert[2][1])
}
// Create a new mesh without an element array buffer (TODO maybe?)
this.mesh = Mesh.construct(gl, vertices, null, uvs, normals)
// Create a new mesh with an element array buffer
this.mesh = Mesh.construct(gl, vertices, indices, uvs, normals)
if (this.material) this.mesh.material = this.material
return true
}
update (gl, dt) {
update (gl, dt, camera) {
this.active = camera.frustum.containsBox(
vec3.transformMat4([], [0.0, 0.0, 0.0], this.transform),
vec3.transformMat4([], [this.size, this.size, this.size], this.transform)
)
if (!this.active) return false
if (!this.generated) return this.generate(this.world.generator)
if (this.dirty) return this.createMesh(gl)
return false
}
@ -275,132 +277,76 @@ class VoxelChunk extends MeshInstance {
this.mesh && this.mesh.dispose(gl)
this.data = {}
}
draw (gl, shader, camera) {
if (this.active) super.draw(gl, shader)
}
}
class VoxelMapBlock extends Node {
constructor (pos, chunkSize = 16, size = 8) {
super(pos)
class VoxelWorld {
constructor (generator, origin, chunkSize = 16, renderDistance = 5) {
this.generator = generator
this.origin = origin
this.chunkSize = chunkSize
this.size = size
this.chunks = {}
this.generated = false
this.chunksLeft = size * size * size
this.renderDistance = renderDistance
this.chunks = []
}
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]
for (const i in this.chunks) {
const c = this.chunks[i]
if (c.relativePos[0] === x && c.relativePos[1] === y && c.relativePos[2] === z) return c
}
return null
}
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
const 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 (const i in this.children) {
const ch = this.children[i]
for (const i in this.chunks) {
const ch = this.chunks[i]
if (!(ch instanceof VoxelChunk)) continue
ch.destroy(gl)
}
this.children = []
this.chunks = {}
this.chunks = []
}
update (gl, dt) {
if (!this.generated) return false
for (const i in this.children) {
const ch = this.children[i]
if (!(ch instanceof VoxelChunk)) continue
if (ch.update(gl, dt)) return true
update (gl, dt, camera) {
const slgrid = [
Math.floor(camera.pos[0] / this.chunkSize),
Math.floor(camera.pos[1] / this.chunkSize),
Math.floor(camera.pos[2] / this.chunkSize)
]
for (let x = slgrid[0] - this.renderDistance; x < slgrid[0] + this.renderDistance; x++) {
for (let z = slgrid[2] - this.renderDistance; z < slgrid[2] + this.renderDistance; z++) {
for (let y = slgrid[1] + this.renderDistance / 2; y > slgrid[1] - this.renderDistance / 2; y--) {
if (this.getChunk(x, y, z)) continue
const chunk = new VoxelChunk(this, [x, y, z], this.chunkSize)
this.chunks.push(chunk)
}
}
}
class VoxelWorld extends Node {
constructor (generator, renderDistance = 2, worldSize = 64, blockSize = 8, chunkSize = 16) {
super([0.0, 0.0, 0.0])
this.generator = generator
this.renderDistance = renderDistance
this.generator = generator
this.worldSize = worldSize
this.blockSize = blockSize
this.chunkSize = chunkSize
this.blocks = {}
this.mapblockqueue = []
const resp = []
for (const i in this.chunks) {
const chunk = this.chunks[i]
const dist = vec3.length(subv3(chunk.relativePos, slgrid))
if (dist < this.renderDistance) resp.push(chunk)
}
this.chunks = resp
queueMapblock (pos) {
this.mapblockqueue.push(pos)
}
getBlock (x, y, z) {
if (!this.blocks[x] || !this.blocks[x][z] || !this.blocks[x][z][y]) return null
return this.blocks[x][z][y]
}
update (gl, cam, dt) {
// Generate queued mapblocks before adding new ones to queue
if (this.mapblockqueue.length) {
const leftover = []
let generated = false
for (const i in this.mapblockqueue) {
const pos = this.mapblockqueue[i]
const check = this.getBlock(pos[0], pos[1], pos[2])
if (generated || check) {
leftover.push(pos)
continue
}
const absPos = mulv3(pos, this.blockSize * this.chunkSize)
const block = new VoxelMapBlock(absPos, this.chunkSize, this.blockSize)
block.generate(this.generator)
if (!this.blocks[pos[0]]) this.blocks[pos[0]] = {}
if (!this.blocks[pos[0]][pos[2]]) this.blocks[pos[0]][pos[2]] = {}
if (!this.blocks[pos[0]][pos[2]][pos[1]]) this.blocks[pos[0]][pos[2]][pos[1]] = {}
this.blocks[pos[0]][pos[2]][pos[1]] = block
this.addChild(block)
generated = true
}
this.mapblockqueue = leftover
return
}
// Calculate a fixed grid
const total = this.blockSize * this.chunkSize
const slgrid = [Math.floor(cam.pos[0] / total), Math.floor(cam.pos[1] / total), Math.floor(cam.pos[2] / total)]
for (let x = slgrid[0] - this.renderDistance / 2; x < slgrid[0] + this.renderDistance / 2; x++) {
for (let z = slgrid[2] - this.renderDistance / 2; z < slgrid[2] + this.renderDistance / 2; z++) {
for (let y = slgrid[1] - this.renderDistance / 2; y < slgrid[1] + this.renderDistance / 2; y++) {
if (this.getBlock(x, y, z)) continue
this.queueMapblock([x, y, z])
}
for (const i in this.chunks) {
const ch = this.chunks[i]
if (ch.update(gl, dt, camera)) break
}
}
for (const i in this.children) {
if (this.children[i].update(gl, dt)) break
draw (gl, shader) {
for (const i in this.chunks) {
this.chunks[i].draw(gl, shader)
}
}
}
@ -410,29 +356,12 @@ class VoxelGenerator {
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 (const i in this.generateQueue) {
const chunk = this.generateQueue[i]
if (chunk.generated) continue
chunk.material = this.material
chunk.generate(this)
}
return this.noise.getHeight(x / 100, z / 100) * this.noise.amplitude + this.groundHeight
}
}
export { VoxelGenerator, Voxel, VoxelChunk, VoxelMapBlock, VoxelWorld }
export { VoxelGenerator, VoxelChunk, VoxelWorld }

27
src/engine/voxel/voxeldata.js Normal file
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@ -0,0 +1,27 @@
const VoxelData = {
index: 0,
registeredVoxels: {},
indexCache: [],
texture: null,
register: (name, def) => {
def.index = VoxelData.index++
VoxelData.registeredVoxels[name] = def
VoxelData.indexCache.push(def)
return def.index
},
get: (name) => {
return VoxelData.registeredVoxels[name]
},
afterRegistration: () => {
},
isSolid: (id) => {
return VoxelData.indexCache[id] ? VoxelData.indexCache[id].solid : false
},
textureIndex: (id, face) => {
}
}
export default VoxelData

9
src/engine/voxel/voxeltexture.js Normal file
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@ -0,0 +1,9 @@
import Screen from '../screen'
function generateTextureMap (registeredVoxels) {
// body...
}
const VoxelTexture = {
}