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https://github.com/bilawalsidhu/gods-eye-view.git
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1fc795577a
Adds a Local ADS-B layer fed by your own receivers: a browser WebUSB RTL-SDR (with FM listening) and local 1090/978 MHz decoder feeds (LOCAL_RECEIVER_FEEDS, local and private addresses only). Local aircraft draw in magenta with class, silhouettes, 3D models, trails and a position sanity filter; the click card names the band and input that heard them. Builds on Sameh Khamis's SDR prototype and the initial GEV port by Mazeyar Moeini Feizabadi (#134); the decoder-feed design follows the notes on #57. Closes #57. Co-authored-by: Sameh Khamis <[email protected]> Co-authored-by: Mazeyar Moeini Feizabadi <[email protected]>
46 lines
1.8 KiB
JavaScript
46 lines
1.8 KiB
JavaScript
/**
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* Shared 3D-model eligibility for the aircraft layers.
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*
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* Eligibility is by DISTANCE (the mode's add/keep band) with ON-SCREEN
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* PRIORITY under the cap, in four visible-first passes so the slots are spent
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* on what the operator can see:
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* 1. KEEP on-screen contacts that already have a model (hysteresis for
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* visible planes);
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* 2. ADD on-screen new contacts inside the add radius, nearest first;
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* 3. KEEP off-screen contacts that already have a model;
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* 4. ADD off-screen new contacts inside the add radius with leftover slots.
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* KEEP is split by frustum so an off-screen retained model can never starve
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* an on-screen contact that wants one.
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*
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* Portable: no Cesium, DOM or layer state.
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*/
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/**
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* @param {Array<[string, number, boolean]>} candidates `[id, distanceSq,
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* onScreen]` for every contact inside the KEEP radius, sorted nearest first.
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* @param {object} options
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* @param {number} options.cap Maximum number of eligible contacts.
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* @param {number} options.addDistSq Squared ADD radius (m²).
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* @param {(id: string) => boolean} options.isModeled Whether the contact
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* already has a model (live, not merely pending).
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* @returns {Set<string>} Contacts that may hold a model this tick.
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*/
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export function selectModelEligible(candidates, { cap, addDistSq, isModeled }) {
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const eligible = new Set();
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const passes = [
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(onScreen, modeled) => onScreen && modeled,
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(onScreen, modeled, inAdd) => onScreen && inAdd,
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(onScreen, modeled) => !onScreen && modeled,
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(onScreen, modeled, inAdd) => !onScreen && inAdd,
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];
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for (const admit of passes) {
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for (const [id, distanceSq, onScreen] of candidates) {
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if (eligible.size >= cap) return eligible;
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if (eligible.has(id)) continue;
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if (admit(onScreen, isModeled(id), distanceSq <= addDistSq))
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eligible.add(id);
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}
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}
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return eligible;
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}
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