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.
69 lines
1.8 KiB
JavaScript
69 lines
1.8 KiB
JavaScript
const sectionKey = (key) =>
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key
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.split(",")
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.map((value) => Math.floor(Number(value) / 16))
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.join(",");
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/** Block positions indexed by their 16³ section without copying block values. */
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export class SectionBlockMap extends Map {
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#sections = new Map();
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constructor(entries) {
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super();
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if (entries != null)
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for (const [key, value] of entries) this.set(key, value);
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}
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set(key, value) {
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if (!super.has(key)) this.#index(key, sectionKey(key));
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return super.set(key, value);
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}
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/** Insert using a section ID already validated by the caller. */
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setInSection(key, value, section) {
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if (!super.has(key)) this.#index(key, section);
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return super.set(key, value);
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}
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#index(key, section) {
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let keys = this.#sections.get(section);
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if (!keys) this.#sections.set(section, (keys = new Set()));
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keys.add(key);
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}
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delete(key) {
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if (!super.delete(key)) return false;
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const section = sectionKey(key),
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keys = this.#sections.get(section);
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keys.delete(key);
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if (!keys.size) this.#sections.delete(section);
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return true;
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}
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/** Remove every stored block in a section and return the number removed. */
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deleteSection(section) {
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const keys = this.#sections.get(section);
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if (!keys) return 0;
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const count = keys.size;
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for (const key of keys) super.delete(key);
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keys.clear();
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this.#sections.delete(section);
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return count;
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}
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clear() {
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super.clear();
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this.#sections.clear();
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}
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/** Live key iterator; an absent or empty section contains no stored blocks. */
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keysInSection(section) {
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return this.#sections.get(section)?.keys() ?? [][Symbol.iterator]();
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}
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/** Sections containing stored blocks; empty loaded sections have no entries. */
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loadedSectionKeys() {
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return this.#sections.keys();
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}
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}
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