commit 2e7795123023a600fd3a04ef0ba8a549ae84e566
Author: Leszek Koltunski <leszek@koltunski.pl>
Date:   Mon Mar 2 15:47:02 2020 +0000

    Hide the InternalSurface class inside its package.

diff --git a/src/main/java/org/distorted/examples/objecttree/ObjectTreeRenderer.java b/src/main/java/org/distorted/examples/objecttree/ObjectTreeRenderer.java
index 613e505..0635648 100644
--- a/src/main/java/org/distorted/examples/objecttree/ObjectTreeRenderer.java
+++ b/src/main/java/org/distorted/examples/objecttree/ObjectTreeRenderer.java
@@ -45,6 +45,7 @@ import org.distorted.library.type.Static1D;
 import org.distorted.library.type.Static3D;
 import org.distorted.library.type.Static4D;
 
+import android.content.res.Resources;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.opengl.GLES31;
@@ -134,8 +135,10 @@ class ObjectTreeRenderer implements GLSurfaceView.Renderer
       GLES31.glCullFace(GLES31.GL_BACK);
       GLES31.glFrontFace(GLES31.GL_CW);
 
-      InputStream is1 = mView.getContext().getResources().openRawResource(R.raw.monalisa);
-      InputStream is2 = mView.getContext().getResources().openRawResource(R.raw.grid);
+      Resources res = mView.getContext().getResources();
+
+      InputStream is1 = res.openRawResource(R.raw.monalisa);
+      InputStream is2 = res.openRawResource(R.raw.grid);
       
       Bitmap bitmap1, bitmap2;