Fixed bug in STL viewer that cannot center the stl file if the stl itself is offseted

web/SystemAO/utilities/stlViewer.html

@@ -120,10 +120,22 @@
 					var material = new THREE.MeshPhongMaterial( { color: 0x545454, specular: 0x0c0c0c, shininess: 100 } );
 					var mesh = new THREE.Mesh( geometry, material );
 					const center = new THREE.Vector3();
-					mesh.position.set( 0, 0, 0 );
-					mesh.rotation.set( 0,  0, 0);
+
+					//Scsale it down to original's 10%
 					mesh.scale.set( 0.1, 0.1, 0.1 );
+					render();
+					var bbox = new THREE.Box3().setFromObject(mesh);
+					//Move the mesh to scene center
+					console.log(bbox);
+					mesh.updateMatrixWorld();
+					console.log(-1 * (bbox.max.x + bbox.min.x));
+					mesh.position.set(-1 * (bbox.max.x + bbox.min.x) / 2, -1 * (bbox.max.y + bbox.min.y) / 2, -1 * (bbox.max.z + bbox.min.z) / 2);
+					mesh.updateMatrixWorld();
+					console.log("Setting mesh world position: ", mesh.getWorldPosition())
+					mesh.rotation.set( 0,  0, 0);
 					
+					render();
+
 					var box = new THREE.Box3().setFromObject(mesh);
 					console.log( box.min, box.max, box.getSize(center) );
 					objectSize = box.getSize(center);