Emil
c7e86663d8
MVP checks / mvp (push) Waiting to run
Add shared Rust/WASM physics, worker meshing and diagnostics, 64-chunk full-height streaming, atlas texture support, and baseline world import. Document the current implementation and include the supplied in-game lobby screenshot.
29 lines
1.3 KiB
JavaScript
29 lines
1.3 KiB
JavaScript
/** Compare only visible mesh neighborhoods; unchanged retained sections keep their buffers. */
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export function changedLightSections(previous, next, sections) {
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if (!previous) return [...sections];
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const index = (field, x, y, z) => {
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x -= field.min[0]; y -= field.min[1]; z -= field.min[2];
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if (x < 0 || y < 0 || z < 0 || x >= field.size[0] || y >= field.size[1] || z >= field.size[2]) return -1;
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return x + field.size[0] * (y + field.size[1] * z);
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};
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const changed = [];
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for (const id of sections) {
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const base = id.split(",").map(v => Number(v) * 16);
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let dirty = false;
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outer: for (let z = base[2] - 1; z <= base[2] + 16; z++)
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for (let y = base[1] - 1; y <= base[1] + 16; y++)
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for (let x = base[0] - 1; x <= base[0] + 16; x++) {
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const a = index(previous, x, y, z), b = index(next, x, y, z);
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if (a < 0 && b < 0) continue;
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if (a < 0 || b < 0 || previous.skyLevels[a] !== next.skyLevels[b] ||
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previous.data[a * 4] !== next.data[b * 4] ||
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previous.data[a * 4 + 1] !== next.data[b * 4 + 1] ||
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previous.data[a * 4 + 2] !== next.data[b * 4 + 2]) {
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dirty = true; break outer;
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}
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}
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if (dirty) changed.push(id);
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}
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return changed;
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}
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