Threejs-射線拾取模型，獲取模型表面點擊的點座標

     addEventListener('click',Ray);// 監聽窗口鼠標單擊事件
     function Ray() {
        var windowX = event.clientX;//鼠標單擊位置橫座標
        var windowY = event.clientY;//鼠標單擊位置縱座標

        var x = (windowX / window.innerWidth) * 2 - 1;//標準設備橫座標
        var y = -(windowY / window.innerHeight) * 2 + 1;//標準設備縱座標
        var standardVector = new THREE.Vector3(x, y, 0.5);//標準設備座標
        //標準設備座標轉世界座標
        var worldVector = standardVector.unproject(camera);
        var ray = worldVector.sub(camera.position).normalize();
        //創建射線投射器對象
        var raycaster = new THREE.Raycaster(camera.position, ray);
        //返回射線選中的對象
        var intersects = raycaster.intersectObjects(floorChildrenGroup);
        console.log(intersects);
        if (intersects.length > 0) {
            var point=intersects[0].point; //射線在模型表面拾取的點座標
            var mesh=intersects[0].object;        
        }

    }

補充一個三維座標轉屏幕座標

    function transPosition(position) {

        let world_vector = new THREE.Vector3(position.x, position.y, position.z);
        let vector = world_vector.project(camera);
        let halfWidth = window.innerWidth / 2,
            halfHeight = window.innerHeight / 2;
        return {
            x: Math.round(vector.x * halfWidth + halfWidth),
            y: Math.round(-vector.y * halfHeight + halfHeight)
        };
    }