我使用Three Js并且我想在我点击Sphere时创建一个显示描述性卡片（Satellite.js的Render（））的函数。 （Satellite.js）
/********** Imports **********/
import React, { PureComponent } from 'react';
import * as THREE from 'three';
import satData from '../data/sat.json';
export class Satellites extends PureComponent {
constructor(props) {
super(props)
this.state = { open: true }
this.x = {};
this.mouse = {};
this.raycaster = new THREE.Raycaster();
this.mouse = new THREE.Vector2();
}
onDocumentMouseDown = event => {
event.preventDefault()
this.mouse.x = (event.clientX / window.innerWidth) * 2 - 1
this.mouse.y = -(event.clientY / window.innerHeight) * 2 + 1
// find intersections
this.raycaster.setFromCamera(this.mouse, this.props.camera)
this.intersects = this.raycaster.intersectObjects(
this.scene.className("card"),
false
)
if (this.intersects.length > 0) {
if (this.intersects[0].object.callback)
this.intersects[0].object.callback()
this.intersects[0].className(".card")
this.particle = new THREE.Sprite(this.particleMaterial)
this.particle.position.copy(this.intersects[0].point)
this.particle.scale.x = this.particle.scale.y = 16
this.props.scene.add(this.particle)
}
}
componentDidMount() {
// Satellite Sphere
// this.geometry = new THREE.SphereGeometry( this.props.data.r, 32, 32 );
this.geometry = new THREE.SphereGeometry(10, 32, 32)
this.material = new THREE.MeshBasicMaterial({ color: 0xffff00 })
this.sphere = new THREE.Mesh(this.geometry, this.material)
this.sphere.callback = function() {
console.log('Toto!')
}
this.sphere.position.set(50, 50, 50)
this.props.scene.add(this.sphere)
document.addEventListener('mousedown', this.onDocumentMouseDown, true)
}
// componentDidUpdate() {
// // update satelite pos.
// const radius = 10;
// const scale = radius * 1;
// this.sphere.scale.x = scale;
// this.sphere.scale.y = scale;
// this.sphere.scale.z = scale;
// }
componentWillUnmount() {
document.removeEventListener('mousedown', this.onDocumentMouseDown);
}
render() {
return (
<div>
{satData.map((satDetail, index) => {
return <div key={index} className="card">
<h2>{satDetail.satName.toUpperCase()}</h2>
<div className="cardImg" >
<img src={satDetail.satImg} alt={satDetail.satAlt} />
</div>
<div>
<p>Altitude : <span>{satDetail.alt}</span> km</p>
<p>Longitude : <span>{satDetail.long}</span> °</p>
<p>Latitude : <span>{satDetail.lat}</span> °</p>
</div>
<button onClick={this.closeModal}>Fermer</button>
</div>
})}
</div>
)
}
}
更多细节here
我得到了一个显示白色方块的教程代码，但我想显示我的div“.card”，它在“Render”中是什么方法？
感谢帮助 ！
这个答案涉及很多主题，基本上你需要：
在这里测试一下：http://jsfiddle.net/mmalex/9k4qbL8s/
let cardShown = false;
function showCard(userText) {
var divElement = $("#card");
if (divElement) {
if (!cardShown) {
divElement.css({
display: "block",
opacity: 0,
height: "0px"
});
}
divElement.text("Object color: " + userText);
if (!cardShown) {
setTimeout(function() {
divElement.css({
opacity: 1,
height: "16px"
});
}, 25);
}
cardShown = true;
}
}
function hideCard() {
var divElement = $("#card");
if (divElement) {
divElement.css({
height: "0px",
opacity: 0
});
cardShown = false;
}
}
var scene = new THREE.Scene();
var raycaster = new THREE.Raycaster();
//create some camera
camera = new THREE.PerspectiveCamera(55, window.innerWidth / window.innerHeight, 0.1, 1000);
camera.position.x = 5;
camera.position.y = 5;
camera.position.z = 5;
camera.lookAt(0, 0, 0);
var controls = new THREE.OrbitControls(camera);
var renderer = new THREE.WebGLRenderer({
antialias: true
});
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setClearColor(new THREE.Color(0x595959));
document.body.appendChild(renderer.domElement);
// white spotlight shining from the side, casting a shadow
var spotLight = new THREE.SpotLight(0xffffff, 2.5, 25, Math.PI / 6);
spotLight.position.set(4, 10, 7);
scene.add(spotLight);
// collect objects for raycasting,
// for better performance don't raytrace all scene
var clickableObjects = [];
var colors = new RayysWebColors();
for (let k = 0; k < 12; k++) {
var size = 0.5;
var geometry = new THREE.BoxGeometry(size, 0.2, size);
var randomColor = colors.pickRandom();
var material = new THREE.MeshPhongMaterial({
color: randomColor.hex,
transparent: true,
opacity: 0.75
});
var cube = new THREE.Mesh(geometry, material);
cube.userData.userText = randomColor.name;
cube.applyMatrix(new THREE.Matrix4().makeTranslation(k % 3, 0, Math.floor(k / 3) - 1));
scene.add(cube);
clickableObjects.push(cube);
}
function animate() {
requestAnimationFrame(animate);
controls.update();
renderer.render(scene, camera);
}
// this will be 2D coordinates of the current mouse position, [0,0] is middle of the screen.
var mouse = new THREE.Vector2();
var clickedObj; // this objects is hovered at the moment
// Following two functions will convert mouse coordinates
// from screen to three.js system (where [0,0] is in the middle of the screen)
function updateMouseCoords(event, coordsObj) {
coordsObj.x = ((event.clientX - renderer.domElement.offsetLeft + 0.5) / window.innerWidth) * 2 - 1;
coordsObj.y = -((event.clientY - renderer.domElement.offsetTop + 0.5) / window.innerHeight) * 2 + 1;
}
function onMouseUp(event) {
updateMouseCoords(event, mouse);
latestMouseProjection = undefined;
clickedObj = undefined;
raycaster.setFromCamera(mouse, camera); {
var intersects = raycaster.intersectObjects(clickableObjects);
if (intersects.length > 0) {
latestMouseProjection = intersects[0].point;
clickedObj = intersects[0].object;
showCard(clickedObj.userData.userText);
} else {
clickedObj = undefined;
hideCard();
}
}
}
window.addEventListener('mouseup', onMouseUp, false);
animate();