vue3+threejs新手从零开发卡牌游戏（十八）：己方场上手牌添加画线

手牌上场后，点击己方怪兽区卡牌会跟随鼠标移动画出线条，之后可以通过判断鼠标移动到对方场地的某卡牌进行战斗操作，代码主要改动在game/index.vue文件。

1.添加鼠标移动监听事件（移动端）：

window.addEventListener('touchstart', onMousedown)
window.addEventListener('touchmove', onMousemove)
window.addEventListener('touchend', onMouseup)

2.鼠标按下获取选中手牌：

// 鼠标按下事件
const onMousedown = (ev: any) => {...// 鼠标选中场上卡牌事件onSelectSiteCard(ev)
}// 鼠标选中场上卡牌事件
const onSelectSiteCard = (point: any) => {let p1Cards = scene.children.filter((v: any) => v.userData?.areaType?.indexOf("己方怪兽区") > -1)if (p1Cards.length <= 0) {return}let arr = raycaster.intersectObjects(p1Cards, true)if (arr.length > 0) {selectedCard.value = arr[0].objectconsole.log(444, arr[0].object)drawLine()}}

3.添加画线逻辑，主要通过CatmullRomCurve3和TubeGeometry管道缓冲几何体配合画线，网上随便找了个箭头的png图做素材：

// 鼠标移动事件
const onMousemove = (ev: any) => {// 将鼠标位置归一化为设备坐标。x 和 y 方向的取值范围是 (-1 to +1)pointer.x = ev.clientX || ev.changedTouches[0].pageXpointer.y = ev.clientY || ev.changedTouches[0].pageY// 画线if (selectedCard.value) {drawLine()}
}// 鼠标抬起事件
const onMouseup = (ev: any) => {let lineMesh = scene.getObjectByName("移动线")if (lineMesh) {scene.remove(lineMesh)}
}// 画线
const drawLine = () => {let mesh = scene.getObjectByName("移动线")if (mesh) {scene.remove(mesh)}let startPos = new THREE.Vector3(0, 0, 0)selectedCard.value.getWorldPosition(startPos)let point = transPos(pointer.x, pointer.y)// 通过摄像机和鼠标位置更新射线raycaster.setFromCamera( point, camera );let plane = scene.getObjectByName("地面")let arr = raycaster.intersectObject(plane)if (arr.length > 0) {// let pos = new THREE.Vector3(0, 0, 0)// arr[0].object.getWorldPosition(pos)let point = arr[0].pointlet curve = new THREE.CatmullRomCurve3([new THREE.Vector3(startPos.x, startPos.y + 0.2, startPos.z),new THREE.Vector3(point.x, point.y + 0.2, point.z)]);let tubeGeometry = new THREE.TubeGeometry(curve, 80, 0.08);const material = new THREE.MeshBasicMaterial({map: arrowTexture,side: THREE.BackSide, //显示背面transparent: true,// color: new THREE.Color("#ff6347")});const _mesh = new THREE.Mesh( tubeGeometry, material );_mesh.name = "移动线"scene.add(_mesh);}
}

页面效果如下，后续方便进行战斗逻辑处理：

附：
game/index.vue代码：

<template><div ref="sceneRef" class="scene"></div><!-- 玩家区 --><Player ref="playerRef"/><!-- 手牌 --><Hand ref="handRef"/><!-- 卡组 --><Deck ref="deckRef"/><!-- 战域 --><Site ref="siteRef"/><!-- 抽卡逻辑 --><DrawCard ref="drawCardRef" :handRef="handRef"/><!-- 对话框 --><Dialog ref="dialogRef" @handToSite="handToSite" @onCancel="onCancel"/>
</template><script setup lang="ts">
import { reactive, ref, onMounted, onBeforeUnmount, watch, defineComponent, getCurrentInstance, nextTick } from 'vue'
import { OrbitControls } from 'three/addons/controls/OrbitControls.js'; // 轨道控制器
import { DragControls } from 'three/addons/controls/DragControls.js';
import { RenderPass } from 'three/addons/postprocessing/RenderPass.js';
import { GlitchPass } from 'three/addons/postprocessing/GlitchPass.js';
import { ShaderPass } from 'three/addons/postprocessing/ShaderPass.js';
import { GammaCorrectionShader } from 'three/examples/jsm/shaders/GammaCorrectionShader.js';
import { OutputPass } from 'three/addons/postprocessing/OutputPass.js';
import { OutlinePass } from 'three/examples/jsm/postprocessing/OutlinePass.js';
import { FontLoader } from 'three/addons/loaders/FontLoader.js';
import { useCommonStore } from "@/stores/common.ts"
import { transPos, editDeckCard, renderDeckText, renderSiteCardText } from "@/utils/common.ts"
import { Card } from "./Card.ts"
import { CARD_DICT } from "@/utils/dict/card.ts"
import { p1TestDeck, p2TestDeck} from "@/utils/deck/test.ts"
import Hand from "./hand/index.vue"
import Deck from "./deck/index.vue"
import Site from "./site/index.vue"
import Player from "./player/index.vue"
import DrawCard from "@/components/DrawCard.vue"
import Dialog from "@/components/Dialog.vue"
import { resolve } from 'dns';// 引入threejs变量
const {proxy} = getCurrentInstance()
const THREE = proxy['THREE']
const scene = proxy['scene']
const camera = proxy['camera']
const renderer = proxy['renderer']
const composer = proxy['composer']
const TWEEN = proxy['TWEEN']// 后期处理
const renderPass = new RenderPass( scene, camera );
composer.addPass( renderPass );// 
const raycaster = new THREE.Raycaster();
const pointer = new THREE.Vector2();const commonStore = useCommonStore()// 场景ref
const sceneRef = ref()
const playerRef = ref()
const siteRef = ref()
const handRef = ref()
const deckRef = ref()
const drawCardRef = ref()
const dialogRef = ref()
const selectedCard = ref() // 选中的场上card// 坐标轴辅助
const axesHelper = new THREE.AxesHelper(5);
// 创建轨道控制器
// const orbitControls = new OrbitControls( camera, renderer.domElement );
// 字体加载器
const fontLoader = new FontLoader();onMounted(async () => {await initResource()initScene()initGame()// 鼠标按下window.addEventListener('touchstart', onMousedown)window.addEventListener('touchmove', onMousemove)window.addEventListener('touchend', onMouseup)// window.addEventListener('click', onMousedown)// 监听浏览器窗口变化进行场景自适应window.addEventListener('resize', onWindowResize, false);
})// 资源加载
const initResource = () => {// 字体加载return new Promise((resolve, reject) => {// Microsoft YaHei_Regular// fonts/helvetiker_regular.typeface.jsonfontLoader.load('fonts/helvetiker_bold.typeface.json', (font: any) => {commonStore.loadFont(font)resolve(true)});})
}// 初始化场景
const initScene = async () => {renderer.setSize( window.innerWidth, window.innerHeight );sceneRef.value.appendChild( renderer.domElement );scene.add(axesHelper)// addSceneBg()// camera.position.set( 5, 5, 5 );camera.position.set( 0, 6.5, 0 );camera.lookAt(0, 0, 0)// const glitchPass = new GlitchPass();// composer.addPass( glitchPass );// const outputPass = new OutputPass();// composer.addPass( outputPass );addPlane()animate();
}// scene添加动态背景
const addSceneBg = () => {const vertices = [];for ( let i = 0; i < 5000; i ++ ) {const x = THREE.MathUtils.randFloatSpread( 1000 );const y = THREE.MathUtils.randFloatSpread( 1000 );const z = THREE.MathUtils.randFloatSpread( 1000 );vertices.push( x, y, z );}const particlesGeometry = new THREE.BufferGeometry();particlesGeometry.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );// 设置点材质const pointsMaterial = new THREE.PointsMaterial();// pointsMaterial.size = 0.9;pointsMaterial.color.set(new THREE.Color("#fff"));// 相机深度而衰减pointsMaterial.sizeAttenuation = true;const points = new THREE.Points(particlesGeometry, pointsMaterial);scene.add(points);// const texture = new THREE.TextureLoader().load( "textures/bg.jpg" );// // const geometry = new THREE.SphereGeometry( 1, 32, 16 );// const geometry = new THREE.CircleGeometry( 6, 32 );// const material = new THREE.MeshBasicMaterial({//   map: texture// });// const sphere = new THREE.Mesh( geometry, material );// sphere.name = "场景背景"// sphere.position.set(0, 0, 0)// sphere.rotateX(-90 * (Math.PI / 180)) // 弧度// scene.add( sphere );// texture.wrapS = THREE.RepeatWrapping;// texture.wrapT = THREE.RepeatWrapping;// scene.background = texture
}// scene中添加plane几何体
const addPlane = () => {const geometry = new THREE.PlaneGeometry( 20, 20);const material = new THREE.MeshBasicMaterial( {color: new THREE.Color("gray"), side: THREE.FrontSide, alphaHash: true,// alphaTest: 0,opacity: 0} );const plane = new THREE.Mesh( geometry, material );plane.rotateX(-90 * (Math.PI / 180)) // 弧度plane.name = "地面"scene.add( plane );
}// 用requestAnimationFrame进行渲染循环
// let bgMesh = scene.getObjectByName("场景背景")
// console.log(123, bgMesh)let arrowTexture = new THREE.TextureLoader().load('textures/arrow.png');
arrowTexture.wrapT = THREE.RepeatWrapping;
arrowTexture.repeat.set(1, 4);
arrowTexture.center = new THREE.Vector2(0.5, 0.5)
arrowTexture.rotation = (-90 * (Math.PI / 180))
arrowTexture.needsUpdate = true;const animate = () => {requestAnimationFrame( animate );if (arrowTexture) {arrowTexture.offset.y -= 0.02; //更新箭头纹理偏移量}TWEEN.update()// let bgMesh = scene.getObjectByName("场景背景")// if (bgMesh) {//   bgMesh.rotation.z += 0.0002// }// renderer.render( scene, camera );composer.render()
}// 场景跟随浏览器窗口大小自适应
const onWindowResize = () => {camera.aspect = window.innerWidth / window.innerHeight;camera.updateProjectionMatrix();renderer.setSize(window.innerWidth, window.innerHeight);
}// 初始化游戏
const initGame = async () => {// 初始化玩家initPlayer()// 初始化场地initSite()// 初始化卡组await initDeck()// 初始化手牌await initHand()// 绑定手牌事件onHandEvent()// await p2DrawCardEvent(1)let p2_handGroup = scene.getObjectByName("p2_handGroup")let cards = p2_handGroup.children.filter((v: any) => v.userData.type === "怪兽")console.log(123, cards)p2HandToSite(cards[0])
}// 初始化玩家
const initPlayer = () => {playerRef.value.init()
}// 初始化场地
const initSite = () => {siteRef.value.init()
}// 初始化卡组
const initDeck = () => {return new Promise((resolve, reject) => {let p1Deck: any = []let p2Deck: any = []// 洗牌p1TestDeck.sort(() => {return Math.random() - 0.5})p2TestDeck.sort(() => {return Math.random() - 0.5})p1TestDeck.forEach((v: any, i: any) => {let obj = CARD_DICT.find((b: any) => b.card_id === v)if (obj) {p1Deck.push({card_id: v,name: `${obj.name}_${i}`})}})p2TestDeck.forEach((v: any, i: any) => {let obj = CARD_DICT.find((b: any) => b.card_id === v)if (obj) {p2Deck.push({card_id: v,name: `${obj.name}_${i}`})}})// console.log("p1Deck", newDeck)commonStore.updateP1Deck(p1Deck)commonStore.updateP2Deck(p2Deck)nextTick(() => {handRef.value.init()deckRef.value.init()resolve(true)})})
}// 初始化手牌
const initHand = () => {let p1 = new Promise((resolve, reject) => {let cardNumber = 4let _number = 0let p1Deck = JSON.parse(JSON.stringify(commonStore.$state.p1Deck))let deckGroup = scene.getObjectByName("p1_deckGroup")let position = new THREE.Vector3(0, 0.005 * p1Deck.length, 0)let _interval = setInterval(async() => {// console.log(123, p1Deck)if (_number < cardNumber) {let obj = p1Deck[p1Deck.length - 1]p1Deck.splice(p1Deck.length-1, 1)commonStore.updateP1Deck(p1Deck)// 修改卡组await editDeckCard(deckGroup, obj, "remove")await renderDeckText(deckGroup, `${commonStore.$state.p1Deck.length}`, commonStore.$state._font, position)// 手牌区添加手牌handRef.value.addP1HandCard(obj, deckGroup)} else {clearInterval(_interval)resolve(true)}_number++}, 200)})let p2 = new Promise((resolve, reject) => {let cardNumber = 4let _number = 0let p2Deck = JSON.parse(JSON.stringify(commonStore.$state.p2Deck))let deckGroup = scene.getObjectByName("p2_deckGroup")let position = new THREE.Vector3(0, 0.005 * p2Deck.length, 0)let _interval = setInterval(async() => {// console.log(123, p1Deck)if (_number < cardNumber) {let obj = p2Deck[p2Deck.length - 1]p2Deck.splice(p2Deck.length-1, 1)commonStore.updateP2Deck(p2Deck)// 修改卡组await editDeckCard(deckGroup, obj, "remove")await renderDeckText(deckGroup, `${commonStore.$state.p2Deck.length}`, commonStore.$state._font, position)// 手牌区添加手牌handRef.value.addP2HandCard(obj, deckGroup)} else {clearInterval(_interval)resolve(true)}_number++}, 200)})return new Promise((resolve, reject) => {Promise.all([p1, p2]).then((res: any) => {resolve(true)})})
}// p2抽牌事件
const p2DrawCardEvent = (cardNumber: any) => {return new Promise((resolve, reject) => {let _number = 0let p2Deck = JSON.parse(JSON.stringify(commonStore.$state.p2Deck))let deckGroup = scene.getObjectByName("p2_deckGroup")let position = new THREE.Vector3(0, 0.005 * p2Deck.length, 0)let _interval = setInterval(async() => {// console.log(123, p1Deck)if (_number < cardNumber) {let obj = p2Deck[p2Deck.length - 1]p2Deck.splice(p2Deck.length-1, 1)commonStore.updateP2Deck(p2Deck)// 修改卡组await editDeckCard(deckGroup, obj, "remove")await renderDeckText(deckGroup, `${commonStore.$state.p2Deck.length}`, commonStore.$state._font, position)// 手牌区添加手牌handRef.value.addP2HandCard(obj, deckGroup)} else {clearInterval(_interval)resolve(true)}_number++}, 200)})
}// p2卡牌上场事件
const p2HandToSite = (card: any) => {let sitePlane = scene.getObjectByName("对方战域Plane")let userData = card.userDataif (userData.type === "怪兽") {let meshes = sitePlane.children.filter((v: any) => v.name.indexOf("对方怪兽区") > -1 && v.userData.empty === true)if (meshes.length > 0) {let _mesh = nulllet m1 = meshes.find((v: any) => v.name.indexOf(1) > -1)let m2 = meshes.find((v: any) => v.name.indexOf(2) > -1)let m3 = meshes.find((v: any) => v.name.indexOf(3) > -1)if (m2) {_mesh = m2} else if (m1) {_mesh = m1} else if (m3) {_mesh = m3}let p2_handGroup = scene.getObjectByName("p2_handGroup")// card.rotateX(180 * (Math.PI / 180)) // 弧度renderSiteCard(p2_handGroup, card, _mesh)}}
}// 鼠标按下事件
const onMousedown = (ev: any) => {// console.log(222, ev.target)// 判断是否点击到canvas上if(!(ev.target instanceof HTMLCanvasElement)){return;}// 将鼠标位置归一化为设备坐标。x 和 y 方向的取值范围是 (-1 to +1)let clientX = ev.clientX || ev.changedTouches[0].pageXlet clientY = ev.clientY || ev.changedTouches[0].pageYlet point = transPos(clientX, clientY)// 通过摄像机和鼠标位置更新射线raycaster.setFromCamera( point, camera );// 点击卡组事件// onP1DeckEvent()// 鼠标选中场上卡牌事件onSelectSiteCard(ev)
}// 鼠标移动事件
const onMousemove = (ev: any) => {// 将鼠标位置归一化为设备坐标。x 和 y 方向的取值范围是 (-1 to +1)pointer.x = ev.clientX || ev.changedTouches[0].pageXpointer.y = ev.clientY || ev.changedTouches[0].pageY// 画线if (selectedCard.value) {drawLine()}
}// 鼠标抬起事件
const onMouseup = (ev: any) => {let lineMesh = scene.getObjectByName("移动线")if (lineMesh) {scene.remove(lineMesh)}
}// 鼠标选中场上卡牌事件
const onSelectSiteCard = (point: any) => {let p1Cards = scene.children.filter((v: any) => v.userData?.areaType?.indexOf("己方怪兽区") > -1)if (p1Cards.length <= 0) {return}let arr = raycaster.intersectObjects(p1Cards, true)if (arr.length > 0) {selectedCard.value = arr[0].objectconsole.log(444, arr[0].object)drawLine()}}// 画线
const drawLine = () => {let mesh = scene.getObjectByName("移动线")if (mesh) {scene.remove(mesh)}let startPos = new THREE.Vector3(0, 0, 0)selectedCard.value.getWorldPosition(startPos)let point = transPos(pointer.x, pointer.y)// 通过摄像机和鼠标位置更新射线raycaster.setFromCamera( point, camera );let plane = scene.getObjectByName("地面")let arr = raycaster.intersectObject(plane)if (arr.length > 0) {// let pos = new THREE.Vector3(0, 0, 0)// arr[0].object.getWorldPosition(pos)let point = arr[0].pointlet curve = new THREE.CatmullRomCurve3([new THREE.Vector3(startPos.x, startPos.y + 0.2, startPos.z),new THREE.Vector3(point.x, point.y + 0.2, point.z)]);let tubeGeometry = new THREE.TubeGeometry(curve, 80, 0.08);const material = new THREE.MeshBasicMaterial({map: arrowTexture,side: THREE.BackSide, //显示背面transparent: true,// color: new THREE.Color("#ff6347")});const _mesh = new THREE.Mesh( tubeGeometry, material );_mesh.name = "移动线"scene.add(_mesh);}
}// 点击卡组事件
const onP1DeckEvent = () => {if (commonStore.$state.p1Deck.length <= 0) {return}let p1_deckGroup = scene.getObjectByName("p1_deckGroup")let arr = raycaster.intersectObject(p1_deckGroup, true)if (arr.length <= 0) {return}let pos1 = p1_deckGroup.userData.positionlet pos2 = new THREE.Vector3(0, 2, 0)// console.log(444, pos1, pos2)if (p1_deckGroup.position.x !== pos2.x) {drawCardRef.value.drawCardAnimate1(p1_deckGroup, pos1, pos2)}
}// 手牌事件
const onHandEvent = () => {let handGroup = scene.getObjectByName("p1_handGroup")const dragControls = new DragControls( handGroup.children, camera, renderer.domElement );dragControls.addEventListener( 'dragstart', function ( event: any ) {event.object.position.y += 0.04});dragControls.addEventListener( 'drag', function ( event: any ) {event.object.position.y += 0.04});dragControls.addEventListener( 'dragend', function ( event: any ) {event.object.position.y -= 0.04let p1SitePlane = scene.getObjectByName("己方战域Plane")let point = transPos(pointer.x, pointer.y)// 通过摄像机和鼠标位置更新射线raycaster.setFromCamera( point, camera );const intersects = raycaster.intersectObjects(p1SitePlane.children);if (intersects.length > 0) {dialogRef.value.init({type: "handToSite",obj: event.object,message: "是否上场该卡牌"})} else {handRef.value.backPosition(event.object)}});
}// 手牌移入己方战域
const handToSite = (data: any) => {let sitePlane = scene.getObjectByName("己方战域Plane")console.log(data)let userData = data.userDataif (userData.type === "怪兽") {let meshes = sitePlane.children.filter((v: any) => v.name.indexOf("己方怪兽区") > -1 && v.userData.empty === true)if (meshes.length > 0) {let _mesh = nulllet m1 = meshes.find((v: any) => v.name.indexOf(1) > -1)let m2 = meshes.find((v: any) => v.name.indexOf(2) > -1)let m3 = meshes.find((v: any) => v.name.indexOf(3) > -1)if (m2) {_mesh = m2} else if (m1) {_mesh = m1} else if (m3) {_mesh = m3}let p1_handGroup = scene.getObjectByName("p1_handGroup")renderSiteCard(p1_handGroup, data, _mesh)}}
}// 绘制场上卡牌
const renderSiteCard = async (handGroup: any, data: any, mesh: any) => {let position = new THREE.Vector3(0, 0, 0)mesh.getWorldPosition(position)mesh.userData.empty = falselet oldMesh = handGroup.children.find((v: any) => v.name === data.name)let newMesh = oldMesh.clone()newMesh.userData.areaType = mesh.name // 用来记录卡牌在哪个区域，怪兽区、墓地、手牌、卡组、场地等newMesh.scale.set(0.8, 0.8, 0.8)if (handGroup.name === "p1_handGroup") {handRef.value.removeP1HandCard(oldMesh)} else if (handGroup.name === "p2_handGroup") {handRef.value.removeP2HandCard(oldMesh)newMesh.rotateX(180 * (Math.PI / 180)) // 弧度newMesh.rotateY(180 * (Math.PI / 180)) // 弧度}scene.add(newMesh)newMesh.position.set(position.x, position.y, position.z)await renderSiteCardText(handGroup, newMesh, commonStore.$state._font)// 创建伽马校正通道// const gammaPass= new ShaderPass(GammaCorrectionShader)// composer.addPass( gammaPass );// const outlinePass = new OutlinePass(new THREE.Vector2( window.innerWidth, window.innerHeight ), scene, camera); // 模糊// outlinePass.edgeStrength = 1.0; // 调整边缘强度// outlinePass.edgeGlow = 1.0; // 边缘发光强度// outlinePass.usePatternTexture = false; // 是否使用纹理// outlinePass.visibleEdgeColor.set(0xffffff); // 设置边缘颜色// outlinePass.hiddenEdgeColor.set(0x000000); // 设置隐藏边缘的颜色// outlinePass.selectedObjects = [newMesh.children[0]]// composer.addPass( outlinePass );console.log(123, newMesh)
}// 取消
const onCancel = (data: any) => {handRef.value.backPosition(data)
}
</script><style lang="scss" scoped>
.scene {position: fixed;top: 0;left: 0;width: 100%;height: 100vh;
}
</style>