Merge remote-tracking branch 'origin/main' into double-sided

CesiumGS · Aug 31, 2024 · 5aef485 · 5aef485
2 parents 238120c + 2bc60bf
commit 5aef485
Showing 1 changed file with 4 additions and 3 deletions.
diff --git a/native~/Runtime/src/CesiumGeoreferenceImpl.cpp b/native~/Runtime/src/CesiumGeoreferenceImpl.cpp
@@ -30,12 +30,13 @@ LocalHorizontalCoordinateSystem createCoordinateSystem(
       DotNet::CesiumForUnity::CesiumGeoreferenceOriginPlacement::TrueOrigin) {
     // In True Origin mode, we want a coordinate system that:
     // 1. Is at the origin,
-    // 2. Converts from Y-up to Z-up, and
-    // 3. Uses the georeference's scale
+    // 2. Inverts Y to create a left-handed coordinate system,
+    // 3. Converts from Z-up to Y-up, and
+    // 4. Uses the georeference's scale
     glm::dmat4 localToEcef(
         glm::dvec4(scale, 0.0, 0.0, 0.0),
         glm::dvec4(0.0, 0.0, scale, 0.0),
-        glm::dvec4(0.0, -scale, 0.0, 0.0),
+        glm::dvec4(0.0, scale, 0.0, 0.0),
         glm::dvec4(0.0, 0.0, 0.0, 1.0));
     return LocalHorizontalCoordinateSystem(localToEcef);
   }