object and phisyjs

[sella89]

hi, i'm doing a project in threejs and i have some issues one of this is : i load a object with OBJMTLLoader and i apply it some skills where all it's ok, but when i must apply the physics to my object with the PHISYJS library i can't apply it to my object, i tried to added my object to the boxMesh and do it invisible but i do not have the results. post part of my code so if there is any way to do it: `var animation = false; var parent = new THREE.Object3D(); var box;

        var loader = new THREE.OBJMTLLoader();
        <!-- Carico il modello per rappresentare l'aereo -->
        var load =  function(object){
            mesh = object;
            mesh.scale.set(0.6,0.6,0.6);
            mesh.position.set(0,-4,-6.6);
            mesh.rotation.x = 0
            mesh.rotation.y = -3.125;
            mesh.rotation.z = 0;

            mesh.castShadow = true;
            var propeller = new Array();
            for(var e in mesh.children){
                if(mesh.children[e].name==="prop01_Cube") {
                    propeller[0]=e;
                }
                if(mesh.children[e].name==="prop02_Cube"){
                    propeller[1]=e;
                }
                if(mesh.children[e].name==="prop_tip01_Cylinder.001"){
                    propeller[2]=e;
                }
            }
            var center = mesh.children[propeller[2]];
            center.children[0].geometry.center();

            var propeller1 = mesh.children[propeller[0]];
            propeller1.children[0].geometry.center();
            //aggancio la prima parte dell'elica al centro
            propeller1.children[0].geometry.translate(-0.4,0.3,-0.15);
            var propeller2 =  mesh.children[propeller[1]];
            propeller2.children[0].geometry.center();
            //aggancio la seconda parte dell'elica al centro
            propeller2.children[0].geometry.translate(0.4,-0.25,0.10);

            center.add(propeller1);
            center.add(propeller2);

            //scene.add(parent);
            parent.add(center);
            parent.rotation.set(0,-3.125,0);
            parent.position.set(0,-3.30,-8.50);
            object3D.add(mesh);
            object3D.add(parent);
            animation=true;
            var phisyGem =  new THREE.CubeGeometry( 10, 10, 10 );
            var phisyMaterial =  new Physijs.createMaterial(new THREE.MeshBasicMaterial(),
                .8, //high friction
                .3 //low restitution
            );
            phisyMaterial.visible = true;
            box= new Physijs.BoxMesh(
                phisyGem,
                phisyMaterial,
                0//mass
            );
            box.position.set(0,-4,-6.6);
            box.add(object3D);
            scene.add(box);
        };
        loader.load('models/ProvaPropeller_obj/provaPropeller2.obj','models/ProvaPropeller_obj/provaPropeller2.mtl', load);`

thanks a lot for any response.