I want flip(rotate) based on the center of the obj using thee js, I have attachec screen shot please refer Clieck here, I have used below three js code, Please any one help me
object.opacity = 2;
object.castShadow = true;
object.receiveShadow = false;
var anglex="+";
var angley="-";
var angle=180;
object.rotation.y = angle*(Math.PI/180);
object.mirroredLoop = true;
object.castShadow = true;
object.receiveShadow = true;
object.name = 'model_'+file;
object.key = object_keyid;
scene.add( object );