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fix(globe3d=11): N-S squeeze via lat * 0.5 not lat / 1.75

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Invert coefficient direction — multiply sampled latitude by 0.5.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
Anton Afanasyeu
2026-08-05 19:18:28 +02:00
parent 9b96a28586
commit 4a0184356d
2 changed files with 4 additions and 4 deletions
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6
assets/hub-globe.js
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@@ -29,8 +29,8 @@ const CONTINENT_INNER_SX = 1.2408477842003853;
const CONTINENT_INNER_SY = 1.2408477842003853;
/** Map plate center longitude (extract_red_polygons.py CENTER_LON). */
const MERCATOR_LON_CENTER = (12 * Math.PI) / 180;
/** N–S squeeze on sphere land sample (higher = shorter poles on disk). */
const CONTINENT_NS_SQUEEZE = 1.75;
/** N–S squeeze multiplier on sampled latitude (0.5 = half vertical span). */
const CONTINENT_NS_SQUEEZE = 0.5;
const RASTER_SCALE = 2;
const AXIS_STEPS = 160;
const SPHERE_AXIS_STEPS = 180;
@@ -956,7 +956,7 @@ function sampleFlatPlateFromHub(mercFlat, hpX, hpY) {
function sampleMercFlatFromTex(mercFlat, tex) {
const ll = texLonLat(tex);
const lon = wrapLon(ll.lon + MERCATOR_LON_CENTER);
const lat = Math.max(-1.52, Math.min(1.52, ll.lat / CONTINENT_NS_SQUEEZE));
const lat = Math.max(-1.52, Math.min(1.52, ll.lat * CONTINENT_NS_SQUEEZE));
return sampleMercFlat(mercFlat, lon, lat);
}