invert KHR_texture_transform vScale, due to babylon using a bottom le…

…ft texture coordinate origin, and glTF expecting a top left coordinate origin (BabylonJS#802)
NiqiuQ · Apr 10, 2020 · 4f60137 · 4f60137
1 parent 11a4d29
commit 4f60137
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/SharedProjects/Babylon2GLTF/GLTFExporter.Texture.cs b/SharedProjects/Babylon2GLTF/GLTFExporter.Texture.cs
@@ -448,9 +448,9 @@ private void AddTextureTransformExtension(ref GLTF gltf, ref GLTFTextureInfo glt
 
             KHR_texture_transform textureTransform = new KHR_texture_transform
             {
-                offset = new float[] { babylonTexture.uOffset, babylonTexture.vOffset },
+                offset = new float[] { babylonTexture.uOffset, -babylonTexture.vOffset },
                 rotation = angle,
-                scale = new float[] { babylonTexture.uScale, babylonTexture.vScale },
+                scale = new float[] { babylonTexture.uScale, -babylonTexture.vScale },
                 texCoord = babylonTexture.coordinatesIndex
             };