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Re-apply NS+EW swap (user feedback: mirror needs fixing)

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User reported 'N at close tiles' and 'NS mirrored, EW reversed'.
With the canvas axes swapped:
- lng=+12 (corridor front in N flight) at canvas top -> screen
  top -> ahead in flight direction (correct)
- perp<0 (world east) at canvas right -> screen right (correct)

Verifies user expectation: north tiles ahead (screen top), east tiles
to the right (screen right). N label appears at the far-ahead tiles
along the top of the screen, pointing forward in flight direction.
This commit is contained in:
Richard Zink committed 2026-10-08 07:06:01 +02:00
1 parent eeb2e3e5f6
commit bfe0a559b5
1 file changed
+6 -2
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vendor/clouds3d.js
Vendored
+6 -2
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@@ -328,8 +328,12 @@ function drawTileAt(lng, perp, dx, dz, centerTileX, centerTileY) {
// (vertical) and perp along canvas X (horizontal). This way the // (vertical) and perp along canvas X (horizontal). This way the
// corridor's long axis (flight direction +Z) appears as a vertical // corridor's long axis (flight direction +Z) appears as a vertical
// strip on canvas, matching the way depth maps on screen. // strip on canvas, matching the way depth maps on screen.
var canvasX = (perp + halfPerp + 0.5) * GROUND_TILE_SIZE; // UNPACK_FLIP_Y_WEBGL=true inverts V: canvas top -> texture V=1 (top).
var canvasY = (lng + halfLong + 0.5) * GROUND_TILE_SIZE; // To put lng=+12 (corridor front in N flight) at screen TOP we put it
// at canvas top (small canvasY). Same inversion for perp so world
// east (dx>0, perp<0) ends up at canvas right (large canvasX).
var canvasX = (-perp + halfPerp + 0.5) * GROUND_TILE_SIZE;
var canvasY = (-lng + halfLong + 0.5) * GROUND_TILE_SIZE;
if (canvasX < 0 || canvasX >= groundCanvas.width || canvasY < 0 || canvasY >= groundCanvas.height) { if (canvasX < 0 || canvasX >= groundCanvas.width || canvasY < 0 || canvasY >= groundCanvas.height) {
return Promise.resolve(false); return Promise.resolve(false);
} }