From 2d31fa4f465f3d5780ab59563368420ca88b7005 Mon Sep 17 00:00:00 2001
From: Anton Afanasyeu <a.afanasieff@gmail.com>
Date: Wed, 5 Aug 2026 22:15:21 +0200
Subject: [PATCH] fix(globe3d=11): pe uses disk rim distance; default pp=0.2

pe was keyed on geographic lon (date line), invisible at view limb.

Co-authored-by: Cursor <cursoragent@cursor.com>
---
 assets/hub-globe.js | 11 ++++++-----
 index.php           |  2 +-
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/assets/hub-globe.js b/assets/hub-globe.js
index fbb8570..ff47f5a 100644
--- a/assets/hub-globe.js
+++ b/assets/hub-globe.js
@@ -31,7 +31,7 @@ const CONTINENT_INNER_SY = 1.2408477842003853;
 /** Map plate center longitude (extract_red_polygons.py CENTER_LON). */
 const MERCATOR_LON_CENTER = (12 * Math.PI) / 180;
 /** Default land-plate zoom (?latf / ?lngf / ?zy / ?zx on globe3d=11). */
-const LAND_ZOOM_DEFAULT = { latf: 1.25, lngf: 1, zy: 1, zx: 1, pp: 0, pe: 0 };
+const LAND_ZOOM_DEFAULT = { latf: 1.25, lngf: 1, zy: 1, zx: 1, pp: 0.2, pe: 0 };
 
 function clampZoomNum(v, min, max, fallback) {
   if (typeof v !== 'number' || !isFinite(v)) {
@@ -56,15 +56,16 @@ function resolveLandZoom(raw) {
  * Land plate sample remap (globe3d=11 URL tunables):
  * latf/lngf — linear zoom; zy/zx — equator/prime-meridian mag (1 = uniform).
  * pp — pole lens pinch (0 = off): pulls N/S sample toward equator near poles.
- * pe — limb lens pinch (0 = off): pulls E/W sample toward center near disk edges.
+ * pe — disk limb pinch (0 = off): uses radial distance on ortho disk, not geo lon.
  */
-function landZoomLonLat(lon, lat, zoom) {
+function landZoomLonLat(lon, lat, zoom, tex) {
   const latT = Math.min(1, Math.abs(lat) / (Math.PI / 2));
   const lonT = Math.min(1, Math.abs(lon) / Math.PI);
+  const rimT = Math.min(1, Math.sqrt(tex.x * tex.x + tex.y * tex.y));
   const latMul = zoom.latf * (zoom.zy * (1 - latT * latT) + latT * latT);
   const lonMul = zoom.lngf * (zoom.zx * (1 - lonT * lonT) + lonT * lonT);
   const poleLens = 1 - zoom.pp * latT * latT;
-  const edgeLens = 1 - zoom.pe * lonT * lonT;
+  const edgeLens = 1 - zoom.pe * rimT * rimT;
   return {
     lon: wrapLon(lon * lonMul * edgeLens + MERCATOR_LON_CENTER),
     lat: Math.max(-1.52, Math.min(1.52, lat * latMul * poleLens)),
@@ -994,7 +995,7 @@ function sampleFlatPlateFromHub(mercFlat, hpX, hpY) {
 /** Sphere tex → mercator-flat plate (lon center + inverse Mercator Y). */
 function sampleMercFlatFromTex(mercFlat, tex, landZoom) {
   const ll = texLonLat(tex);
-  const mapped = landZoomLonLat(ll.lon, ll.lat, landZoom);
+  const mapped = landZoomLonLat(ll.lon, ll.lat, landZoom, tex);
   return sampleMercFlat(mercFlat, mapped.lon, mapped.lat);
 }
 
diff --git a/index.php b/index.php
index b133cb6..e7cf13a 100644
--- a/index.php
+++ b/index.php
@@ -187,7 +187,7 @@ function hub_h(string $s): string {
       var supportsLayout = !!(window.CSS && CSS.supports && CSS.supports('object-fit', 'cover'));
       var logoEnabled = !!(stage && supportsSvg && supportsLayout);
 
-      var logoBuild = '20260704globe27';
+      var logoBuild = '20260704globe29';
 
       function hubAsset(rel) {
         var link = document.querySelector('link[href*="hub.css"]');