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Small refactor in makeChunk

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This commit is contained in:
Paul Mathieu 2021-12-11 17:34:52 -08:00
parent ce7f4f66c5
commit 5a334fec13
1 changed files with 23 additions and 18 deletions
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41
index.js
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@ -223,7 +223,7 @@ function makeTerrain(x, y) {
function makeChunk(x, y) { function makeChunk(x, y) {
const terrain = makeTerrain(x, y); const terrain = makeTerrain(x, y);
const chunk = new Uint8Array(16 * 16 * 256); const data = new Uint8Array(16 * 16 * 256);
for (let i = 0; i < 16; i++) { for (let i = 0; i < 16; i++) {
for (let j = 0; j < 16; j++) { for (let j = 0; j < 16; j++) {
@ -233,19 +233,25 @@ function makeChunk(x, y) {
// everything below is dirt // everything below is dirt
const offset = i * (16 * 256) + j * 256; const offset = i * (16 * 256) + j * 256;
const stoneHeight = Math.min(62, height); const stoneHeight = Math.min(62, height);
chunk.set(Array(stoneHeight).fill(BlockType.STONE), offset); data.set(Array(stoneHeight).fill(BlockType.STONE), offset);
if (stoneHeight < height) { if (stoneHeight < height) {
chunk.set(Array(height - 1 - stoneHeight).fill(BlockType.DIRT), offset + stoneHeight); data.set(Array(height - 1 - stoneHeight).fill(BlockType.DIRT), offset + stoneHeight);
chunk[offset + height - 1] = BlockType.GRASS; data[offset + height - 1] = BlockType.GRASS;
} }
chunk.set(Array(256 - height).fill(BlockType.AIR), offset + height); data.set(Array(256 - height).fill(BlockType.AIR), offset + height);
} }
} }
return chunk; return {
position: {x, y},
data,
};
} }
function makeChunkMesh(chunk, z0, x0) { function makeChunkMesh(chunk) {
const {x: z0, y: x0} = chunk.position;
const {data} = chunk;
const blockPos = i => { const blockPos = i => {
const x = Math.floor(i / (16 * 256)); const x = Math.floor(i / (16 * 256));
const y = Math.floor((i - 16 * 258 * x) / 256); const y = Math.floor((i - 16 * 258 * x) / 256);
@ -282,20 +288,20 @@ function makeChunkMesh(chunk, z0, x0) {
const bi = blockIndex(i, j, k); const bi = blockIndex(i, j, k);
const upTexture = (() => { const upTexture = (() => {
switch (chunk[bi - 1]) { switch (data[bi - 1]) {
case BlockType.GRASS: return [0, 15]; case BlockType.GRASS: return [0, 15];
case BlockType.DIRT: return [2, 15]; case BlockType.DIRT: return [2, 15];
case BlockType.STONE: return [3, 15]; case BlockType.STONE: return [3, 15];
} }
})(); })();
if (chunk[bi] == BlockType.AIR) { if (data[bi] == BlockType.AIR) {
faces.push(makeFace('+y', upTexture, [x0 + j, k - 0.5, z0 + i])); faces.push(makeFace('+y', upTexture, [x0 + j, k - 0.5, z0 + i]));
break; break;
} }
const sideTexture = (() => { const sideTexture = (() => {
switch (chunk[bi]) { switch (data[bi]) {
case BlockType.GRASS: return [1, 15]; case BlockType.GRASS: return [1, 15];
case BlockType.DIRT: return [2, 15]; case BlockType.DIRT: return [2, 15];
case BlockType.STONE: return [3, 15]; case BlockType.STONE: return [3, 15];
@ -303,7 +309,7 @@ function makeChunkMesh(chunk, z0, x0) {
})(); })();
for ({ pos, dir } of sideNeighbors(i, j)) { for ({ pos, dir } of sideNeighbors(i, j)) {
if (chunk[blockIndex(...pos, k)] == BlockType.AIR) { if (data[blockIndex(...pos, k)] == BlockType.AIR) {
faces.push(makeFace(dir, sideTexture, faceDir(dir, x0 + j, k, z0 + i))); faces.push(makeFace(dir, sideTexture, faceDir(dir, x0 + j, k, z0 + i)));
} }
} }
@ -328,15 +334,14 @@ function makeChunkMesh(chunk, z0, x0) {
function makeWorldBuffers(gl) { function makeWorldBuffers(gl) {
const chunkFaces = [].concat( const chunkFaces = [].concat(
makeChunkMesh(makeChunk(0, -16), 0, -16), makeChunkMesh(makeChunk(0, -16)),
makeChunkMesh(makeChunk(16, -16), 16, -16), makeChunkMesh(makeChunk(16, -16)),
makeChunkMesh(makeChunk(0, 0), 0, 0), makeChunkMesh(makeChunk(0, 0)),
makeChunkMesh(makeChunk(16, 0), 16, 0), makeChunkMesh(makeChunk(16, 0)),
makeChunkMesh(makeChunk(16, 16), 16, 16), makeChunkMesh(makeChunk(16, 16)),
makeChunkMesh(makeChunk(0, 16), 0, 16), makeChunkMesh(makeChunk(0, 16)),
); );
return makeBuffersFromFraces(gl, chunkFaces); return makeBuffersFromFraces(gl, chunkFaces);
} }