Fix flip of Y component of normal when computing tangents.

kring · kring · commit 0b2cfdf5dfda · 2025-06-02T19:41:07.000+10:00
diff --git a/Source/CesiumRuntime/Private/CesiumGltfComponent.cpp b/Source/CesiumRuntime/Private/CesiumGltfComponent.cpp
@@ -643,6 +643,7 @@ static void mikkSetTSpaceBasic(
 
   TangentX.Y = -TangentX.Y;
   TangentY.Y = -TangentY.Y;
+  TangentZ.Y = -TangentZ.Y;
 
   vertexBuffer.SetVertexTangents(vertexIndex, TangentX, TangentY, TangentZ);
 }

Original file line number	Diff line number	Diff line change
`@@ -643,6 +643,7 @@ static void mikkSetTSpaceBasic(`
`643`	`643`
`644`	`644`	`TangentX.Y = -TangentX.Y;`
`645`	`645`	`TangentY.Y = -TangentY.Y;`
	`646`	`+ TangentZ.Y = -TangentZ.Y;`
`646`	`647`
`647`	`648`	`vertexBuffer.SetVertexTangents(vertexIndex, TangentX, TangentY, TangentZ);`
`648`	`649`	`}`