Question

我试图使用Raycaster找到来自'child'和网格（child2）的光线之间的交叉点：

var raycaster = new THREE.Raycaster();
var meshList = [];
meshList.push(child2);
for (var i = 0; i < child.geometry.vertices.length; i++) {
    var diff = new THREE.Vector3();
    diff.subVectors (child.geometry.vertices[i],child2.position);
    raycaster.set(child.geometry.vertices[i],diff.normalize());
    var intersects = raycaster.intersectObjects( meshList );
    console.log(intersects[0].point);
}

但是上面的代码在最后一行给出了错误（console.log（intersects [0] .distance））：“TypeError：undefined不是一个对象（评估'intersects [0] .point'）”。

如何提取光线和'child2'网格之间的交叉点？

Answer 1

测试以确保确实有结果！

var intersects = raycaster.intersectObjects( meshList );
if (intersects.length) {
   console.log(intersects[0].point);
} else {
   console.log('ha, you missed me');
}

如何提取intersectObjects的交叉点（Vector3）？

1 个答案: