A 帧 - 光线投射 Three.JS 3D 对象

Question

我在 A 帧场景中有两个对象，一个圆柱体和一个多边形，代表一个 Three.js 3D 对象。我想要的只是多边形在悬停时发生变化，就像圆柱体一样。

我这里有一个工作演示：Demo

当光标悬停在圆柱体上时，屏幕上会出现HOVERED字样，圆柱体的颜色也会发生变化，使用了Raycaster组件。我怎样才能对多边形做同样的事情？

多边形是这样创建的：

AFRAME.registerComponent('foo', {
    init: function() {
        let points = [];
        points.push(new THREE.Vector2(0, 0));
        points.push(new THREE.Vector2(1.5, 0));
        points.push(new THREE.Vector2(2.5, 1));
        points.push(new THREE.Vector2(2.5, 2.5));
        points.push(new THREE.Vector2(1, 3.5));

        for (let i = 0; i < points.length; i++) {
            points[i].multiplyScalar(0.25);
        }
        let shape = new THREE.Shape(points);


        let extrudedGeometry = new THREE.ExtrudeGeometry(shape, {
            amount: 1,
            bevelEnabled: false
        });

        // Geometry doesn't do much on its own, we need to create a Mesh from it
        let extrudedMesh = new THREE.Mesh(extrudedGeometry, new THREE.MeshPhongMaterial({
            color: 0xff0000
        }));
        this.el.object3D.add(extrudedMesh);

        let geometry = new THREE.ShapeGeometry(shape);
        let material = new THREE.MeshBasicMaterial({
            color: 0x00ff00
        });
        let mesh = new THREE.Mesh(geometry, material);
        this.el.object3D.add(mesh);
    }
});

谢谢。

Answer 1

Raycaster 向实体的网格投射光线。你用 setObject3D 设置它。做：

let mesh = new THREE.Mesh(geometry, material);
this.el.setObject3D('mesh', mesh);

Corrected code

A 帧 - 光线投射 Three.JS 3D 对象

A-Frame - Raycast Three.JS 3D Object

javascript

3d

three.js

raycasting

aframe