feat:鼠标移入效果

ZhangXianQiang

2024-04-18 496f3a16fa0fddd23af01fe6cb4d0709a6ebc8d9

 src/views/screen/components/screen-map-three/experience/world/map.js

@@ -4,18 +4,26 @@

import textureMapImage from '@/assets/map/texture/gz-map.jpg';
import textureMapFxImage from '@/assets/map/texture/gz-map-fx.jpg';
import { mergeGeometries } from 'three/examples/jsm/utils/BufferGeometryUtils.js';

import gsap from 'gsap';
// 地图深度
const MAP_DEPTH = 0.2;

const projection = d3.geoMercator().center([104.779307, 29.33924]).translate([0, 0, 0]);

const raycaster = new THREE.Raycaster();

export default class Map {
    constructor(experience) {
        this.experience = experience;
        this.scene = this.experience.scene;
        this.material = null;
        this.camera = this.experience.camera;
        this.provinceMeshList = [];
        this.textureLoader = new THREE.TextureLoader();
        this.setTexture();
        this.operationData(mapData);
        this.setLineHelper();
    }
    setTexture() {
        const textureMap = this.textureLoader.load(textureMapImage);
@@ -29,7 +37,8 @@
        textureMapFx.repeat.set(scale, scale);
        this.topFaceMaterial = new THREE.MeshPhongMaterial({
            map: textureMap,
            color: 0xb4eeea,
            // color: 0xb4eeea,
            color: 0xb3fffa,
            combine: THREE.MultiplyOperation,
            transparent: true,
            opacity: 1,
@@ -46,8 +55,8 @@
     * @param {*} jsondata 地图数据
     */
    operationData(jsondata) {
        this.map = new THREE.Group();

        this.map = new THREE.Object3D();
        // geo信息
        const features = jsondata.features;
        features.forEach((feature) => {
@@ -58,13 +67,13 @@
            // 多个情况
            // console.log(feature.geometry.type);
            if (feature.geometry.type === "MultiPolygon") {
                console.log(feature.geometry.coordinates);
                feature.geometry.coordinates.forEach((coordinate) => {
                    coordinate.forEach((rows) => {
                        const line = this.drawBoundary(rows);
                        const mesh = this.drawExtrudeMesh(rows);
                        province.add(line);
                        province.add(mesh);
                        this.provinceMeshList.push(mesh);
                    });
                });
            }
@@ -76,16 +85,20 @@
                    const mesh = this.drawExtrudeMesh(coordinate);
                    province.add(line);
                    province.add(mesh);
                    this.provinceMeshList.push(mesh);
                });
            }
            // 合并mesh
            // const mergedGeometry = mergeGeometries(province.children,true);
            province.isHover = false;
            this.map.add(province);
        });
        this.map.position.set(1, 1, 0.15);
        this.map.position.set(1, 1, -1.5);
        this.map.scale.set(10, 10, 10);
        this.map.rotation.set(THREE.MathUtils.degToRad(-90), 0, THREE.MathUtils.degToRad(20));
        this.container = new THREE.Object3D();
        this.container.add(this.map);
        this.scene.add(this.container);
        this.scene.add(this.map);
        console.log(this.map);
        this.setMouseEvent();
    }

    /**
@@ -135,4 +148,116 @@
            this.sideMaterial,
        ]);
    }


    setMouseEvent() {
        this.mouseEvent = this.handleEvent.bind(this);
        // this.experience.canvas.addEventListener("mousemove", this.throttle(this.mouseEvent,100));
        this.experience.canvas.addEventListener("mousemove", this.mouseEvent);
    }

    removeMouseEvent() {
        this.experience.canvas.removeEventListener("mousemove", this.mouseEvent);
    }

    handleEvent(e) {
        // console.log(this);
        // return;
        if (this.map) {
            let mouse = new THREE.Vector2();
            let getBoundingClientRect = this.experience.canvas.getBoundingClientRect();
            let x = ((e.clientX - getBoundingClientRect.left) / getBoundingClientRect.width) * 2 - 1;
            let y = -((e.clientY - getBoundingClientRect.top) / getBoundingClientRect.height) * 2 + 1;
            mouse.x = x;
            mouse.y = y;

            raycaster.setFromCamera(mouse, this.camera.instance);

            let intersects = raycaster.intersectObjects(this.provinceMeshList, false);

            if (intersects.length) {
                let temp = intersects[0].object;
                this.animation(temp.parent);
            } else {
                this.animation();
            }
        }
    }

    throttle(callback, delay) {
        let lastCall = 0;
        return function () {
            let now = new Date().getTime();
            if (now - lastCall >= delay) {
                lastCall = now;
                callback.apply(null, arguments);
            }
        };
    }

    animation(province) {
        if (province) {
            if (!province.isHover) {
                province.isHover = true;
                this.map.children.forEach((item) => {
                    if (item.properties === province.properties) {
                        gsap.to(province.position, {
                            z: 0.12,
                            duration: 0.6
                        })
                    } else {
                        this.resetAnimation(item);
                    }
                })
            }
        } else {
            this.resetAllAnimation();
        }

    }

    resetAnimation(province) {
        gsap.to(province.position, {
            z: 0,
            duration: 0.6,
            onComplete: () => {
                province.isHover = false;
            }
        })
    }

    resetAllAnimation() {
        this.map.children.forEach((item) => {
            this.resetAnimation(item);
        })
    }

    setLineHelper() {
        const material = new THREE.LineBasicMaterial({
            color: 0x0000ff
        });

        const points = [];
        points.push(new THREE.Vector3(0, 0, 0));
        points.push(new THREE.Vector3(0, 0, 0));

        const geometry = new THREE.BufferGeometry().setFromPoints(points);

        this.lineHelper = new THREE.Line(geometry, material);
        console.log(this.lineHelper);
        this.scene.add(this.lineHelper);
    }

    updateLine(raycaster) {
        let pointArray = new Float32Array([
            raycaster.ray.origin.x,
            raycaster.ray.origin.y,
            raycaster.ray.origin.z,
            raycaster.ray.direction.x,
            raycaster.ray.direction.y,
            raycaster.ray.direction.z,
        ])
        this.lineHelper.geometry.attributes.position.array = pointArray;
        this.lineHelper.geometry.attributes.position.needsUpdate = true;
    }
}