Update app.py

app.py

@@ -121,6 +121,7 @@ def main(share=True):
         
         vertices = np.asarray(pcd.points)
         vertex_colors = (np.asarray(pcd.colors) * 255).astype(np.uint8)
+        vertices[:, 1] = -vertices[:, 1]
         mesh = trimesh.PointCloud(vertices=vertices, colors=vertex_colors)
         tmp_glb = tempfile.NamedTemporaryFile(suffix='.glb', delete=False)
         mesh.export(tmp_glb.name)