package com.se.simu.service;
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import cn.hutool.json.JSONUtil;
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import com.se.simu.config.PropertiesConfig;
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import com.se.simu.domain.po.DataPo;
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import com.se.simu.domain.po.SimuPo;
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import com.se.simu.domain.vo.*;
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import com.se.simu.helper.GdalHelper;
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import lombok.extern.slf4j.Slf4j;
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import org.gdal.gdal.Dataset;
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import org.gdal.gdal.gdal;
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import org.gdal.gdalconst.gdalconst;
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import org.gdal.osr.SpatialReference;
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import org.gdal.osr.osr;
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import org.springframework.stereotype.Service;
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import javax.annotation.Resource;
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import java.io.File;
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import java.io.FileInputStream;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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/**
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* 内涝服务类
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*
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* @author WWW
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* @date 2024-07-16
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*/
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@Slf4j
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@Service
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@SuppressWarnings("ALL")
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public class WaterService {
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@Resource
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PropertiesConfig config;
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/**
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* 获取元数据信息
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*/
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public byte[] getson(String serviceName, String json) {
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try {
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String filePath = config.getOutPath() + File.separator + serviceName + File.separator + json;
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File dat = new File(filePath);
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if (!dat.exists()) {
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return null;
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}
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byte[] bytes = new byte[(int) dat.length()];
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FileInputStream fs = new FileInputStream(filePath);
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fs.read(bytes);
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fs.close();
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return bytes;
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} catch (Exception ex) {
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log.error(ex.getMessage(), ex);
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return null;
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}
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}
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/**
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* 获取地形高度图
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*/
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public String getTerraMap(String serviceName, Integer width, Integer height) {
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return config.getOutPath() + File.separator + serviceName + File.separator + "terrain" + File.separator + width + "_" + height + ".png";
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}
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/**
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* 获取水面高度图
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*/
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public String getWaterMap(String serviceName, Integer width, Integer height, Long timestamp) {
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return config.getOutPath() + File.separator + serviceName + File.separator + "waters" + File.separator + timestamp + File.separator + width + "_" + height + ".png";
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}
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/**
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* 获取水流向流速图
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*/
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public String getFlowMap(String serviceName, Integer width, Integer height, Long timestamp) {
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return config.getOutPath() + File.separator + serviceName + File.separator + "flows" + File.separator + timestamp + File.separator + width + "_" + height + ".png";
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}
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/**
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* 获取图层 *
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*/
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public Layer getLayer(String serviceName) {
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Layer layer = new Layer();
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layer.setVersion(config.getVer());
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layer.setDuration(new Duration(1719812810225L, 1719812810225L));
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layer.setExtension(new Extension(2.11062743358, 0.53812160220, 2.11070827834, 0.53819799453, 1.151, 38.83));
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List<Integer[]> sizes = new ArrayList<>();
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sizes.add(new Integer[]{64, 64});
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sizes.add(new Integer[]{128, 128});
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sizes.add(new Integer[]{256, 256});
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sizes.add(new Integer[]{512, 512});
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sizes.add(new Integer[]{1024, 1024});
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sizes.add(new Integer[]{2048, 2048});
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layer.setTerrain(new Terrain(sizes));
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List<Long> data = new ArrayList<>(Arrays.asList(1719812812225L, 1719812812225L, 1719812812225L, 1719812812225L, 1719812812225L, 1719812812225L));
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layer.setWaters(new Water(data));
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return layer;
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}
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/**
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* 根据坐标查询积水深度:gdalconst.GA_Update
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*/
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public Double getWaterHeight(SimuPo simu, double x, double y, Long timestamp) {
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String filePath = config.getOutPath() + File.separator + simu.getServiceName() + File.separator + "waters"
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+ File.separator + timestamp + File.separator + "water.tif";
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Dataset ds = null;
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try {
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ds = gdal.Open(filePath, gdalconst.GA_ReadOnly);
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if (null == ds || ds.getRasterCount() < 1) {
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return null;
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}
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if (null == ds.GetSpatialRef()) {
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ds.SetSpatialRef(getSpatialRef(simu));
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}
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double[] gt = ds.GetGeoTransform();
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double[] xy = GdalHelper.fromWgs84(ds.GetSpatialRef(), x, y);
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int[] XY = coordinates2ColRow(gt, xy[0], xy[1]);
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if (XY[0] < 0 || XY[1] < 0 || XY[0] > ds.getRasterXSize() || XY[1] > ds.getRasterYSize()) {
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return null;
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}
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double[] vals = new double[1];
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ds.GetRasterBand(1).ReadRaster(XY[0], XY[1], 1, 1, vals);
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return isValid(vals[0]) ? vals[0] : null;
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} catch (Exception ex) {
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log.error(ex.getMessage(), ex);
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return null;
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} finally {
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if (null != ds) ds.delete();
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}
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}
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private SpatialReference getSpatialRef(SimuPo simu) {
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DataPo data = JSONUtil.toBean(simu.getData(), DataPo.class);
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SpatialReference sr = new SpatialReference();
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sr.ImportFromEPSG(data.getEpsg());
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sr.SetAxisMappingStrategy(osr.OAMS_TRADITIONAL_GIS_ORDER);
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return sr;
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}
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/**
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* 将地图坐标转换为栅格像素坐标
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*
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* @param gt 仿射变换参数
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* @param x 横坐标
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* @param y 纵坐标
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* @return 像素坐标
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*/
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public int[] coordinates2ColRow(double[] gt, double x, double y) {
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// 向下取整,如果向上取整会导致计算结果偏大，从而在后面读取到邻近像元的数据
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//Double col = Math.floor(((y - gt[3]) * gt[1] - (x - gt[0]) * gt[4]) / (gt[5] * gt[1] - gt[2] * gt[4]));
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Double col = Math.floor((y * gt[1] - x * gt[4] + gt[0] * gt[4] - gt[3] * gt[1]) / (gt[5] * gt[1] - gt[2] * gt[4]));
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Double row = Math.floor((x - gt[0] - col * gt[2]) / gt[1]);
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return new int[]{row.intValue(), col.intValue()};
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}
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public static boolean isValid(double val) {
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return !Double.isNaN(val) && val > Integer.MIN_VALUE;
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}
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}
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