Object 旋转带有纹理问题的三维对象

我试着模仿 通过使用3d.obj文件和纹理贴图

但我一直收到以下错误，加上旋转完全关闭

未捕获的TypeError:无法读取未定义的属性“rotation”

---

完整演示在这里

为

组分配值

加载代码尚未执行，且

obj

没有值。在加载函数中移动这10行代码

我已经做到了，如果有人需要知道你需要应用矩阵旋转

这里有一个例子

function onWindowResize() {

    windowHalfX = window.innerWidth / 2;
    windowHalfY = window.innerHeight / 2;

    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();

    renderer.setSize( window.innerWidth, window.innerHeight );
}
//
function onDocumentMouseDown( event ) {
    event.preventDefault();
    document.addEventListener( 'mousemove', onDocumentMouseMove, false );
    document.addEventListener( 'mouseup', onDocumentMouseUp, false );
    document.addEventListener( 'mouseout', onDocumentMouseOut, false );
    mouseXOnMouseDown = event.clientX - windowHalfX;
    targetRotationOnMouseDown = targetRotation;
}

function onDocumentMouseMove( event ) {
    mouseX = event.clientX - windowHalfX;
    targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.02;
}

function onDocumentMouseUp( event ) {
    document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
    document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
    document.removeEventListener( 'mouseout', onDocumentMouseOut, false );
}

function onDocumentMouseOut( event ) {
    document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
    document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
    document.removeEventListener( 'mouseout', onDocumentMouseOut, false );
}

function onDocumentTouchStart( event ) {
    if ( event.touches.length === 1 ) {
        event.preventDefault();
        mouseXOnMouseDown = event.touches[ 0 ].pageX - windowHalfX;
        targetRotationOnMouseDown = targetRotation;
    }

}

function onDocumentTouchMove( event ) {
    if ( event.touches.length === 1 ) {
        event.preventDefault();
        mouseX = event.touches[ 0 ].pageX - windowHalfX;
        targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.05;
    }

}

function animate() {
    requestAnimationFrame( animate );
    render();
    stats.update();
}

function render() {
    //plane.rotation.y = group.rotation.y += ( targetRotation - group.rotation.y ) * 0.05;

    var rotation = new THREE.Matrix4().makeRotationY(Math.PI/2);
    var translation = new THREE.Matrix4().makeTranslation(0, 0, 0);
    rotation = group.rotation.y += (targetRotation - group.rotation.y);
    var transformation = new THREE.Matrix4().makeTranslation(0, 0, 0).makeRotationY(rotation * 0.01 * 0.3) ;
    group.applyMatrix(transformation);
    renderer.render( scene, camera );

}

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谢谢你，我已经把它修好了，但是你知道如何设置旋转点吗？你的

render（）

逻辑没有什么意义。另外，每秒实例化3 x 60=180

Matrix4

s。您需要能够解释每行代码都在做什么。