/**
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* 高德地图3D图形绘制相关
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*/
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import { map, object3Dlayer } from './index_old';
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// 3d图形
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var _cylinder = undefined,
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// 当前绘制的图形中的最小高度
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_minH = -1,
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// 当前绘制的图形中的最大高度
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_maxH = -1;
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//监测数据
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var _factorDatas = {
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lnglats: [],
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heights: [],
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type: ''
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},
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//当前选中的监测因子数据
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_factor = {},
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_zoomFirst = true;
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function onMapZoom() {
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// 首次地图缩放监听不执行（因为设定监听函数后会立即执行一次，可能官方函数有相关参数，后续待修改）
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if (_zoomFirst) {
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_zoomFirst = false;
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return;
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}
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const fDatas = _factorDatas;
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const factor = _factor;
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drawMesh(fDatas, factor);
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// console.log(map.getZoom());
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}
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var _maxHeight = 1000,
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_minHeight = 100,
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_lastZoom = -1;
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/**
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* 获取当前地图缩放等级下的绘制高度缩放比例
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* @param {*} minH 当前监测数据的最小高度
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* @param {*} maxH 当前监测数据的最大高度
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*/
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function _getScale(minH, maxH) {
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var zoom = map.getZoom();
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if (_lastZoom == -1) {
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_lastZoom = zoom;
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} else if (_lastZoom <= 8) {
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_lastZoom = zoom;
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return;
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} else if (_lastZoom >= 18) {
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_lastZoom = zoom;
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return;
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}
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if (zoom <= 8) {
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_maxHeight = 10000;
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_minHeight = 1000;
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} else if (zoom <= 9) {
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_maxHeight = 9000;
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_minHeight = 900;
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} else if (zoom <= 10) {
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_maxHeight = 8000;
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_minHeight = 800;
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} else if (zoom <= 11) {
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_maxHeight = 7000;
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_minHeight = 700;
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} else if (zoom <= 12) {
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_maxHeight = 6000;
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_minHeight = 600;
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} else if (zoom <= 14) {
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_maxHeight = 5000;
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_minHeight = 500;
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} else if (zoom <= 15) {
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_maxHeight = 4500;
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_minHeight = 450;
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} else if (zoom <= 16) {
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_maxHeight = 4000;
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_minHeight = 400;
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} else if (zoom <= 17) {
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_maxHeight = 2500;
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_minHeight = 250;
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} else if (zoom > 17) {
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_maxHeight = 1000;
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_minHeight = 100;
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}
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var scale = (_maxHeight - _minHeight) / (maxH - minH);
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return scale;
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}
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/**
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* 绘图
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*/
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function drawMesh(fDatas, factor, merge) {
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const lnglats_GD = fDatas.lnglats_GD;
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const coors = fDatas.coors_GD;
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const heights = factor.heights;
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const colors = factor.colors;
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// const bColor = factor.bottomColor;
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const bColors = factor.bottomColors;
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// eslint-disable-next-line no-undef
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var cylinder = new AMap.Object3D.Mesh();
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cylinder.backOrFront = 'both';
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cylinder.transparent = true;
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var geometry = cylinder.geometry;
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const scale = _getScale(_minH, _maxH);
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for (let i = 0; i < coors.length; i++) {
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var r = lnglats_GD[i];
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var lastP = lnglats_GD[i - 1];
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var p = coors[i];
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var h = (heights[i] - _minH) * scale + _minHeight;
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if (heights[i] == -1) {
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h = -1;
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}
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geometry.vertices.push(p.x, p.y, 0); //底部顶点
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geometry.vertices.push(p.x, p.y, 0 - h); //顶部顶点
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if (i > 0) {
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// eslint-disable-next-line no-undef
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var distance = AMap.GeometryUtil.distance(r, lastP);
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//两个数据点最小间隔时间为4s，假设车速按照120km/h计算，4s行驶最大距离作为132米，
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//设定超过1分钟的数据绘制特殊的连线
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if (distance <= 500 && h != -1) {
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var bottomIndex = i * 2;
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var topIndex = bottomIndex + 1;
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var lastBottomIndex = bottomIndex - 2;
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var lastTopIndex = bottomIndex - 1;
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geometry.faces.push(bottomIndex, topIndex, lastTopIndex);
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geometry.faces.push(bottomIndex, lastBottomIndex, lastTopIndex);
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}
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}
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geometry.vertexColors.push.apply(geometry.vertexColors, bColors[i]); //底部顶点颜色
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geometry.vertexColors.push.apply(geometry.vertexColors, colors[i]); //顶部顶点颜色
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}
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// 7.根据合并选项重置或新增当前缓存数据
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if (merge != true) {
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_factorDatas = fDatas;
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_factor = factor;
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if (_cylinder != undefined) {
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object3Dlayer.remove(_cylinder);
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}
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} else {
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// _factorDatas.lnglats.push.apply(
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// _factorDatas.lnglats,
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// lnglats_GD
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// );
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// _factorDatas.coors.push.apply(_factorDatas.coors, coors);
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// _factorDatas.heights.push.apply(_factorDatas.heights, heights);
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// _factorDatas.colors.push.apply(_factorDatas.colors, colors);
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// _factorDatas.bottomColor = bColor;
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}
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object3Dlayer.add(cylinder);
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/**************test ****************/
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// object3Dlayer.on('mouseover', function (e) {
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// console.log(
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// `鼠标移入覆盖物! [${e.lnglat.getlng()}, ${e.lnglat.getLat()}]`
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// );
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// });
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/**************test ****************/
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_cylinder = cylinder;
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}
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export default {
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clear() {
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map.off('zoomend', onMapZoom);
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if (_cylinder != undefined) {
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object3Dlayer.remove(_cylinder);
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}
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},
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drawMesh: drawMesh,
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/**
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* 绘制3D走行路线图
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* @param fDatas 完整监测数据
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* @param factor 当前展示的监测因子对象
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* @param merge 是否和之前绘制的图形合并
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*/
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drawRoadMap(fDatas, factor, merge) {
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const lnglats_GD = fDatas.lnglats_GD;
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const heights = factor.heights;
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// 1.关闭地图缩放监听
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map.off('zoomend', onMapZoom);
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// 2.计算绘图高度的边界值
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if (merge != true) {
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var minH = _minH < 0 ? heights[0] : _minH;
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var maxH = _maxH < 0 ? heights[0] : _maxH;
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for (let i = 0; i < heights.length; i++) {
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const h = heights[i];
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minH = Math.min(minH, h);
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maxH = Math.max(maxH, h);
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}
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_minH = minH;
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_maxH = maxH;
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}
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// 5.绘制3D图形
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this.drawMesh(fDatas, factor, merge);
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// 缩放地图到合适的视野级别
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// map.setFitView()
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// 6.开启地图缩放监听
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if (lnglats_GD.length > 0) {
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map.on('zoomend', onMapZoom);
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}
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}
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};
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