问Three.js -设置相机位置

EN

 <script>

        var scene               = new THREE.Scene();
        var camera              = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 1000 );
        var renderer            = new THREE.WebGLRenderer();
        var loader              = new THREE.STLLoader();
        var mesh;

        renderer.setClearColor(0xFFFFFF, 1);

        renderer.setSize( window.innerWidth, window.innerHeight );
        document.body.appendChild( renderer.domElement );

        loader.addEventListener( 'load', function ( event ) {
            var geometry = event.content;
            var redPhongMaterial = new THREE.MeshPhongMaterial({ color: 0xFFEA32, side: THREE.DoubleSide, ambient:0x000000});
            mesh         = new THREE.Mesh( geometry, redPhongMaterial )
            mesh.castShadow = true;
            mesh.receiveShadow = true;
            geometry.computeBoundingBox();
            var boundingBox = mesh.geometry.boundingBox.clone();
            drawBoundingBox(boundingBox, mesh.scale.x, mesh.scale.y, mesh.scale.z);
            mesh.translateX (0);
            mesh.translateY (0);
            mesh.translateZ (0);
            scene.add( mesh );

        } );
        loader.addEventListener( 'progress', function ( event ) {
            document.getElementById('progress').innerHTML = 'Progress: '+event.loaded+'%';
        });
        loader.addEventListener( 'error', function ( event ) {
            alert( event.message );
        });
        loader.load( 'pet.stl' );

        camera.position.set( 15, -10, 120 );

        render();

        function render() {
            requestAnimationFrame(render);
            renderer.render(scene, camera);
        }

    </script>