Viewer: start the camera closer to the point cloud (1.7x -> 1.15x fit)

app.py

@@ -783,7 +783,7 @@ VIEWER_JS = """
     var c = box.getCenter(new THREE.Vector3());
     var s = box.getSize(new THREE.Vector3());
     var r = Math.max(s.x, s.y, s.z) * 0.5 || 0.5;
-    var d = (r / Math.tan(camera.fov * Math.PI / 360)) * 1.7;
+    var d = (r / Math.tan(camera.fov * Math.PI / 360)) * 1.15;
     orbit.target.copy(c);
     camera.near = Math.max(d / 200, 0.0005);
     camera.far = d * 50 + r * 20;