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Release God's Eye View as open source
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// src/data/aircraftIcons.js
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/**
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* Nose-up white aircraft silhouettes, one per classifyAircraft() kind, as SVG
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* data URIs for Cesium billboards.
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*
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* FIDELITY NOTE (2026-07-02): redrawn at a 96×96 viewBox (glyph centered at
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* 48,48) instead of the old 32×32. The billboards themselves are still added at
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* width/height 20 (24 tracked) in flights.js / militaryFlights.js, so Cesium
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* DOWN-samples this larger, higher-precision source to the same on-screen
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* footprint — crisp anti-aliased edges instead of an upscaled 32px bitmap. The
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* on-screen size is unchanged and CLASS_SCALE_2D is untouched (no scale
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* compensation needed: the billboard's explicit width/height, not the SVG's,
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* sets the pixel size — the intrinsic SVG size only controls raster fidelity).
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*
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* All glyphs are nose-up (nose toward -Y at rotation 0; the screen-projected
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* rotation pipeline in iconOrientation.js spins the whole glyph). Fill is white
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* with a subtle dark hairline stroke so the tint pipeline (billboard.color =
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* white / cyan-tracked / amber-military, plus .withAlpha fades) keeps working —
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* no per-glyph hardcoded colors that would fight the tint.
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*
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* MIXED-SET UPDATE (2026-08-15, selected asset set): airliner/widebody/
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* turboprop/helicopter use the "refined" recognition-chart redraw;
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* quadjet/glider use the "bold" chart-symbol redraw; light/fastjet keep the
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* original drawings. Raster fidelity doubled (192px source, same 96 coords).
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*
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* Silhouette language follows skylight's type-aware glyphs (MIT,
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* https://github.com/cpaczek/skylight): slender fuselages, swept wings for
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* jets, long high-aspect wings for the glider, straight wings + prop discs for
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* props, a rotor disc + tail boom + tail-rotor for the helicopter, and a delta
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* for the fast jet. Each class has a DISTINCT planform so it reads at ~20px by
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* shape, not just by footprint size.
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*/
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const VIEW = 96;
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const C = VIEW / 2; // 48 — glyph centre
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// Hairline dark edge (scaled for the 96 box: ~1.5u ≈ the old 0.5u at 32).
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const STROKE = 'stroke="rgba(0,0,0,0.32)" stroke-width="1.4" stroke-linejoin="round"';
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// Heavier edge for the chart-symbol ("bold") glyphs adopted 2026-08-15.
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const STROKE_BOLD = 'stroke="rgba(0,0,0,0.38)" stroke-width="2" stroke-linejoin="round"';
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// Softer white for translucent detail (prop discs, rotor disc) — still white so
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// the tint multiplies cleanly; only the alpha differs.
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const DISC = 'fill="white" fill-opacity="0.5"';
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// Each body is drawn in a centred coordinate frame (origin 0,0 = glyph centre),
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// nose toward -Y. Numbers are in the 96-unit space (half-extent up to ~45).
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const BODIES = {
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// ── Airliner: slender swept-wing narrow-body, two underwing engine pods,
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// swept tailplane. The canonical jet; everything else reads against it.
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airliner: `
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<path d="M0,-42 C 3.8,-40 4.6,-34 4.6,-26 L 4.6,-14
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L 32,4 L 34,6 L 34,10 L 31.4,9.2 L 4.6,2.4
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L 4.2,20
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L 14,28 L 14,32 L 0,28.6 L -14,32 L -14,28 L -4.2,20
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L -4.6,2.4 L -31.4,9.2 L -34,10 L -34,6 L -32,4 L -4.6,-14
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L -4.6,-26 C -4.6,-34 -3.8,-40 0,-42 Z" fill="white" ${STROKE}/>
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<path d="M-15.5,-1.5 l3,7.6 4,-1.4 -1.5,-8.4 Z" fill="white"/>
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<path d="M15.5,-1.5 l-3,7.6 -4,-1.4 1.5,-8.4 Z" fill="white"/>
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<path d="M-1.6,33.5 L 1.6,33.5 L 1.6,40 L -1.6,40 Z" fill="white"/>`,
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// ── Widebody: same swept jet but noticeably BIGGER span + fatter fuselage,
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// twin engines set further out. Reads as a heavier airliner.
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widebody: `
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<path d="M0,-45 C 5.6,-43 6.8,-36 6.8,-27 L 6.8,-12
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L 38,9 L 41.5,12.4 L 41.5,16.6 L 37.6,15 L 6.8,6
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L 6.3,21
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L 17,30 L 17,34.6 L 0,30.4 L -17,34.6 L -17,30 L -6.3,21
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L -6.8,6 L -37.6,15 L -41.5,16.6 L -41.5,12.4 L -38,9 L -6.8,-12
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L -6.8,-27 C -6.8,-36 -5.6,-43 0,-45 Z" fill="white" ${STROKE}/>
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<path d="M-19,2 l3.6,9 4.8,-1.7 -1.8,-10 Z" fill="white"/>
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<path d="M19,2 l-3.6,9 -4.8,-1.7 1.8,-10 Z" fill="white"/>
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<path d="M-2,35.5 L 2,35.5 L 2,42.5 L -2,42.5 Z" fill="white"/>`,
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// ── Quadjet: the widest swept jet, with FOUR bold underwing engine pods (two
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// per wing) that hang well below the trailing edge — the wing reads as a
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// 4-lumped bar even when the individual pods blur together at ~20px.
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quadjet: `
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<path d="M0,-45 C 7,-42 9,-34 9,-25 L 9,-11
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L 46,12 L 46,21 L 9,11.5
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L 8.4,21 L 20,31 L 20,37.5 L 0,32 L -20,37.5 L -20,31 L -8.4,21
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L -9,11.5 L -46,21 L -46,12 L -9,-11
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L -9,-25 C -9,-34 -7,-42 0,-45 Z" fill="white" ${STROKE_BOLD}/>
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<rect x="-31" y="9" width="7" height="12" rx="2" fill="white"/>
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<rect x="-17" y="4.5" width="7" height="12" rx="2" fill="white"/>
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<rect x="10" y="4.5" width="7" height="12" rx="2" fill="white"/>
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<rect x="24" y="9" width="7" height="12" rx="2" fill="white"/>`,
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// ── Turboprop: bold STRAIGHT (unswept) wings — thicker chord than a jet — two
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// fat nacelles that jut ahead of the leading edge, each capped by a solid
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// prop disc. Reads as "straight wing with two lumps + discs" at ~20px.
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turboprop: `
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<path d="M0,-40 C 3.4,-38.5 4.2,-33 4.2,-26 L 4.2,-18
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L 36,-15.5 L 36,-7.5 L 4.2,-8
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L 3.8,22
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L 13,27.5 L 13,31.5 L 0,28.6 L -13,31.5 L -13,27.5 L -3.8,22
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L -4.2,-8 L -36,-7.5 L -36,-15.5 L -4.2,-18
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L -4.2,-26 C -4.2,-33 -3.4,-38.5 0,-40 Z" fill="white" ${STROKE}/>
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<circle cx="-17.5" cy="-16.5" r="7.5" fill="white" fill-opacity="0.5"/>
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<circle cx="17.5" cy="-16.5" r="7.5" fill="white" fill-opacity="0.5"/>
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<path d="M-19.5,-19 h4 v5 h-4 Z" fill="white"/>
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<path d="M15.5,-19 h4 v5 h-4 Z" fill="white"/>
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<path d="M-1.7,31.5 L 1.7,31.5 L 1.7,38.5 L -1.7,38.5 Z" fill="white"/>`,
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// ── Light GA: small and CHUNKY — short, DEEP-chord straight wings and a fat
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// stubby fuselage make it read as a solid little block (not a thin cross),
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// with a bold nose prop disc. The short deep wing is the anti-glider cue.
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light: `
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<path d="M0,-27
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C 4,-25 5.2,-20 5.2,-13
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L 5.2,-9
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L 27,-9 L 27,6 L 5.2,6
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L 5.2,16
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L 11.5,23 L 11.5,27 L 0,23.5 L -11.5,27 L -11.5,23 L -5.2,16
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L -5.2,6
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L -27,6 L -27,-9 L -5.2,-9
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L -5.2,-13
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C -5.2,-20 -4,-25 0,-27 Z" fill="white" ${STROKE}/>
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<ellipse cx="0" cy="-29" rx="12" ry="3.8" ${DISC}/>`,
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// ── Glider: VERY long, high-aspect TAPERED wings (fat root → thin tips) on a
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// slim fuselage with a T-tail. The extreme span is the whole identity — it
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// reads as "the wide skinny one" against light's short stubby wings.
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glider: `
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<path d="M0,-35 C 2.4,-33 3,-29 3,-25 L 3,-14
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L 45,-10.5 L 45,-3.5 L 2.9,-6
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L 2.2,32 L -2.2,32 L -2.9,-6
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L -45,-3.5 L -45,-10.5 L -3,-14
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L -3,-25 C -3,-29 -2.4,-33 0,-35 Z" fill="white" ${STROKE_BOLD}/>
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<rect x="-10.5" y="32.5" width="21" height="5" rx="1.5" fill="white" ${STROKE_BOLD}/>`,
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// ── Helicopter: a SOLID translucent main-rotor disc (survives downscale as an
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// obvious circle, unlike a thin ring) with a bold two-blade cross, a
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// teardrop cabin, a tail boom, and a tail rotor. Unmistakable "disc on top"
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// silhouette that never reads as a fixed-wing.
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helicopter: `
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<circle cx="0" cy="-6" r="31" fill="white" fill-opacity="0.22"/>
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<g transform="rotate(45 0 -6)">
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<rect x="-30.5" y="-8.2" width="61" height="4.4" rx="2.2" fill="white" fill-opacity="0.9"/>
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<rect x="-30.5" y="-8.2" width="61" height="4.4" rx="2.2" fill="white" fill-opacity="0.9" transform="rotate(90 0 -6)"/>
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</g>
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<path d="M0,-22 C 8,-20 10.5,-13 10.5,-6 C 10.5,2 7.5,7 0,8.5
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C -7.5,7 -10.5,2 -10.5,-6 C -10.5,-13 -8,-20 0,-22 Z" fill="white" ${STROKE}/>
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<path d="M-2.6,8 L 2.6,8 L 1.8,32 L -1.8,32 Z" fill="white" ${STROKE}/>
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<path d="M-8,27 L 8,27 L 8,30.6 L -8,30.6 Z" fill="white"/>
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<circle cx="5.6" cy="35" r="6" fill="white" fill-opacity="0.6"/>
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<circle cx="5.6" cy="35" r="2.1" fill="white"/>`,
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// ── Fast jet: sharp delta/cropped-delta with a pointed nose, LERX root
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// blend, and twin tail fins. Aggressive, all-wing.
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fastjet: `
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<path d="M0,-43
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L 3.5,-30
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C 4,-24 4.6,-16 5,-8
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L 27,20 L 27,26 L 6,16
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L 8,30 L 8,34 L 3,31
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L 3,38 L 6.5,42 L 6.5,44 L 0,41.5
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L -6.5,44 L -6.5,42 L -3,38
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L -3,31 L -8,34 L -8,30 L -6,16
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L -27,26 L -27,20 L -5,-8
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C -4.6,-16 -4,-24 -3.5,-30 Z" fill="white" ${STROKE}/>`,
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// 2026-08-15 Hangar additions: two NEW classes shipped with the real-model
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// fleet (CLASS_MODEL_REAL). Same contract as the set above: 96×96 nose-up,
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// white fill, hairline stroke, tint-safe.
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// Business jet — slender fuselage, modest swept wing, aft engines, T-tail.
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bizjet: `
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<path d="M0,-42
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L 2.6,-36 L 3.4,-26 L 3.4,-8
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L 27,8 L 27,13 L 3.6,6
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L 3.6,16
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L 8,18 L 8,26 L 3.8,25
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L 3.2,30 L 15,34 L 15,38 L 2.4,36
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L 0,40
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L -2.4,36 L -15,38 L -15,34 L -3.2,30
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L -3.8,25 L -8,26 L -8,18 L -3.6,16
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L -3.6,6 L -27,13 L -27,8 L -3.4,-8
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L -3.4,-26 L -2.6,-36 Z" fill="white" ${STROKE}/>`,
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// ── TR-3B (hidden 9th kind, Easter egg — NOT a classifyAircraft() output).
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// The canonical black-triangle silhouette: a dark isosceles delta with a
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// light at each corner and a dimmer one at the centre. Reached only by
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// explicit user conversion (see tr3bRegistry.js), never by classification.
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//
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// DELIBERATE BREAK from the white-fill contract above: this glyph is a
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// SHADOW, so it carries its own near-black fill. The billboard tint still
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// multiplies (white fleet / cyan tracked / amber military), which darkens
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// rather than lightens — the triangle stays a silhouette in every layer,
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// and the corner lights pick the tint up as their hue.
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tr3b: `
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<path d="M0,-38 L 40,30 L -40,30 Z"
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fill="#0d1014" stroke="rgba(158,184,210,0.34)" stroke-width="1.6"
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stroke-linejoin="round"/>
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<circle cx="0" cy="-24" r="8.5" fill="#c9dcf0" fill-opacity="0.13"/>
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<circle cx="-28" cy="21" r="8.5" fill="#c9dcf0" fill-opacity="0.13"/>
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<circle cx="28" cy="21" r="8.5" fill="#c9dcf0" fill-opacity="0.13"/>
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<circle cx="0" cy="-24" r="4.6" fill="#dceaf8" fill-opacity="0.52"/>
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<circle cx="-28" cy="21" r="4.6" fill="#dceaf8" fill-opacity="0.52"/>
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<circle cx="28" cy="21" r="4.6" fill="#dceaf8" fill-opacity="0.52"/>
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<circle cx="0" cy="6" r="3.4" fill="#dceaf8" fill-opacity="0.26"/>`,
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// ── TR-3B, thermal-reactive variant. Same cold airframe, but the three
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// corner emitters + the centre one render HOT: near-white cores inside a
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// baked radial glow, so the FLIR/NVG luminance mapping (and any bloom)
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// lights them up while the hull stays cold. Selected by the layers
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// whenever their `irBoost` style param is on (surveillance/thermal/nvg).
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tr3bHot: `
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<defs>
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<radialGradient id="tr3bGlow">
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<stop offset="0%" stop-color="#ffffff" stop-opacity="0.92"/>
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<stop offset="32%" stop-color="#f2f9ff" stop-opacity="0.44"/>
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<stop offset="100%" stop-color="#dcefff" stop-opacity="0"/>
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</radialGradient>
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</defs>
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<path d="M0,-38 L 40,30 L -40,30 Z"
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fill="#0b0e12" stroke="rgba(126,148,172,0.3)" stroke-width="1.6"
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stroke-linejoin="round"/>
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<circle cx="0" cy="-24" r="15" fill="url(#tr3bGlow)"/>
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<circle cx="-28" cy="21" r="15" fill="url(#tr3bGlow)"/>
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<circle cx="28" cy="21" r="15" fill="url(#tr3bGlow)"/>
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<circle cx="0" cy="6" r="10" fill="url(#tr3bGlow)"/>
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<circle cx="0" cy="-24" r="5.2" fill="#ffffff"/>
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<circle cx="-28" cy="21" r="5.2" fill="#ffffff"/>
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<circle cx="28" cy="21" r="5.2" fill="#ffffff"/>
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<circle cx="0" cy="6" r="3.6" fill="#ffffff" fill-opacity="0.82"/>`,
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// Large UAV (Reaper-class) — bulbous sensor nose, very long slender
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// straight wings, slim tail boom, canted V-tail.
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uav: `
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<path d="M0,-40
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C 3.6,-40 4.6,-35 4.4,-30
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L 2.4,-12
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L 43,-7 L 43,-2.5 L 2.3,0
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L 2.1,24
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L 13,32 L 13,36 L 1.6,30
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L 0,38
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L -1.6,30 L -13,36 L -13,32 L -2.1,24
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L -2.3,0 L -43,-2.5 L -43,-7 L -2.4,-12
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L -4.4,-30 C -4.6,-35 -3.6,-40 0,-40 Z" fill="white" ${STROKE}/>`,
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};
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const _iconCache = new Map();
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const _b64 = (s) =>
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typeof btoa === 'function' ? btoa(s) : Buffer.from(s, 'utf8').toString('base64');
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/** Fleet raster: billboards render at ~40–58 DEVICE px (width 20–24 CSS ×
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* Retina × class scale). Cesium's billboard atlas has no mipmaps, so a big
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* texture gets GPU-minified into mush (192 px ÷ 40 = 4.8× — the owner's
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* "soft" glyphs; the pre-2026-08-15 96 px raster aliased instead). Rastering
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* NEAR the display size lets the browser's SVG AA do the work: crisp AND
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* smooth. 64 covers the 40–58 px fleet band with ≤1.6× minification. */
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const FLEET_RASTER_PX = 64;
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/** Tracked raster: the tracked billboard is the one SUSTAINED large 2D glyph
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* (close-zoom fleet flybys hand off to 3D models). Keep the 192 px texture so
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* it stays crisp at its biggest on-screen sizes. */
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const TRACKED_RASTER_PX = 192;
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/** Data URI for a class silhouette (lazily built, cached per kind+size).
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* Default size serves the fleet; pass `aircraftIcon(kind, TRACKED_ICON_PX)`
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* (re-exported below) for the tracked billboard. */
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export const TRACKED_ICON_PX = TRACKED_RASTER_PX;
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export function aircraftIcon(kind, px = FLEET_RASTER_PX) {
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const k = BODIES[kind] ? kind : 'airliner';
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const key = `${k}@${px}`;
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let uri = _iconCache.get(key);
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if (!uri) {
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const svg = `<svg xmlns="http://www.w3.org/2000/svg" width="${px}" height="${px}" viewBox="0 0 ${VIEW} ${VIEW}"><g transform="translate(${C},${C})">${BODIES[k]}</g></svg>`;
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uri = 'data:image/svg+xml;base64,' + _b64(svg);
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_iconCache.set(key, uri);
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}
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return uri;
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}
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