/*
* Copyright (C) 2011-2012 Dr. John Lindsay <jlindsay@uoguelph.ca>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package plugins;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.PriorityQueue;
import whitebox.geospatialfiles.ShapeFile;
import whitebox.geospatialfiles.WhiteboxRaster;
import whitebox.geospatialfiles.shapefile.*;
import whitebox.interfaces.WhiteboxPlugin;
import whitebox.interfaces.WhiteboxPluginHost;
import whitebox.structures.BoundingBox;
import whitebox.structures.RowPriorityGridCell;
/**
* This tool is used to increment the elevations in a digital elevation model (DEM) along the boundaries of a watershed polygon.
*
* @author Dr. John Lindsay email: jlindsay@uoguelph.ca
*/
public class WallWatershed implements WhiteboxPlugin {
private WhiteboxPluginHost myHost = null;
private String[] args;
WhiteboxRaster DEM;
WhiteboxRaster watershed;
WhiteboxRaster output;
String outputHeader = null;
String watershedHeader = null;
String demHeader = null;
int rows = 0;
int cols = 0;
double noData = -32768;
double gridRes = 0;
/**
* Used to retrieve the plugin tool's name. This is a short, unique name
* containing no spaces.
*
* @return String containing plugin name.
*/
@Override
public String getName() {
return "WallWatershed";
}
/**
* Used to retrieve the plugin tool's descriptive name. This can be a longer
* name (containing spaces) and is used in the interface to list the tool.
*
* @return String containing the plugin descriptive name.
*/
@Override
public String getDescriptiveName() {
return "Wall-in Watershed";
}
/**
* Used to retrieve a short description of what the plugin tool does.
*
* @return String containing the plugin's description.
*/
@Override
public String getToolDescription() {
return "Creates a wall within a DEM around a watershed.";
}
/**
* Used to identify which toolboxes this plugin tool should be listed in.
*
* @return Array of Strings.
*/
@Override
public String[] getToolbox() {
String[] ret = {"DEMPreprocessing"};
return ret;
}
/**
* Sets the WhiteboxPluginHost to which the plugin tool is tied. This is the
* class that the plugin will send all feedback messages, progress updates,
* and return objects.
*
* @param host The WhiteboxPluginHost that called the plugin tool.
*/
@Override
public void setPluginHost(WhiteboxPluginHost host) {
myHost = host;
}
/**
* Used to communicate feedback pop-up messages between a plugin tool and
* the main Whitebox user-interface.
*
* @param feedback String containing the text to display.
*/
private void showFeedback(String message) {
if (myHost != null) {
myHost.showFeedback(message);
} else {
System.out.println(message);
}
}
/**
* Used to communicate a return object from a plugin tool to the main
* Whitebox user-interface.
*
* @return Object, such as an output WhiteboxRaster.
*/
private void returnData(Object ret) {
if (myHost != null) {
myHost.returnData(ret);
}
}
private int previousProgress = 0;
private String previousProgressLabel = "";
/**
* Used to communicate a progress update between a plugin tool and the main
* Whitebox user interface.
*
* @param progressLabel A String to use for the progress label.
* @param progress Float containing the progress value (between 0 and 100).
*/
private void updateProgress(String progressLabel, int progress) {
if (myHost != null && ((progress != previousProgress)
|| (!progressLabel.equals(previousProgressLabel)))) {
myHost.updateProgress(progressLabel, progress);
}
previousProgress = progress;
previousProgressLabel = progressLabel;
}
/**
* Used to communicate a progress update between a plugin tool and the main
* Whitebox user interface.
*
* @param progress Float containing the progress value (between 0 and 100).
*/
private void updateProgress(int progress) {
if (myHost != null && progress != previousProgress) {
myHost.updateProgress(progress);
}
previousProgress = progress;
}
/**
* Sets the arguments (parameters) used by the plugin.
*
* @param args An array of string arguments.
*/
@Override
public void setArgs(String[] args) {
this.args = args.clone();
}
private boolean cancelOp = false;
/**
* Used to communicate a cancel operation from the Whitebox GUI.
*
* @param cancel Set to true if the plugin should be canceled.
*/
@Override
public void setCancelOp(boolean cancel) {
cancelOp = cancel;
}
private void cancelOperation() {
showFeedback("Operation cancelled.");
updateProgress("Progress: ", 0);
}
private boolean amIActive = false;
/**
* Used by the Whitebox GUI to tell if this plugin is still running.
*
* @return a boolean describing whether or not the plugin is actively being
* used.
*/
@Override
public boolean isActive() {
return amIActive;
}
/**
* Used to execute this plugin tool.
*/
@Override
public void run() {
amIActive = true;
String inputWatershedFile;
int row, col;
int i;
int topRow, bottomRow, leftCol, rightCol;
float progress;
double increment;
double rowYCoord, colXCoord;
double[][] geometry;
BoundingBox box;
int numPoints, numParts, part;
int startingPointInPart, endingPointInPart;
double x1, y1, x2, y2, xPrime, yPrime;
if (args.length <= 0) {
showFeedback("Plugin parameters have not been set.");
return;
}
demHeader = args[0];
inputWatershedFile = args[1];
outputHeader = args[2];
increment = Double.parseDouble(args[3]);
// check to see that the inputHeader and outputHeader are not null.
if ((demHeader == null) || (inputWatershedFile == null) || (outputHeader == null)) {
showFeedback("One or more of the input parameters have not been set properly.");
return;
}
try {
DEM = new WhiteboxRaster(demHeader, "r");
rows = DEM.getNumberRows();
cols = DEM.getNumberColumns();
noData = DEM.getNoDataValue();
gridRes = (DEM.getCellSizeX() + DEM.getCellSizeY()) / 2;
output = new WhiteboxRaster(outputHeader, "rw", demHeader, WhiteboxRaster.DataType.FLOAT, noData);
output.setPreferredPalette(DEM.getPreferredPalette());
if (inputWatershedFile.toLowerCase().endsWith(".dep")) {
watershedHeader = inputWatershedFile;
watershed = new WhiteboxRaster(watershedHeader, "r");
if (watershed.getNumberColumns() != cols || watershed.getNumberRows() != rows) {
showFeedback("The input files must have the same dimensions.");
return;
}
double[] demData;
boolean isBorderingCell;
double w;
int[] dX = {1, 1, 1, 0, -1, -1, -1, 0};
int[] dY = {-1, 0, 1, 1, 1, 0, -1, -1};
for (row = 0; row < rows; row++) {
demData = DEM.getRowValues(row);
for (col = 0; col < cols; col++) {
w = watershed.getValue(row, col);
if (w > 0 && demData[col] != noData) {
// is the cell neighbouring at least one non-watershed cell?
isBorderingCell = false;
for (i = 0; i < 8; i++) {
if (watershed.getValue(row + dY[i], col + dX[i]) != w) {
isBorderingCell = true;
break;
}
}
if (isBorderingCell) {
output.setValue(row, col, demData[col] + increment);
}
} else {
output.setValue(row, col, demData[col]);
}
}
if (cancelOp) {
cancelOperation();
return;
}
progress = (float) (100f * row / (rows - 1));
updateProgress((int) progress);
}
} else if (inputWatershedFile.toLowerCase().endsWith(".shp")) {
// initialize the shapefile input
ShapeFile input = new ShapeFile(inputWatershedFile);
if (input.getShapeType() != ShapeType.POLYLINE
&& input.getShapeType() != ShapeType.POLYLINEZ
&& input.getShapeType() != ShapeType.POLYLINEM
&& input.getShapeType() != ShapeType.POLYGON
&& input.getShapeType() != ShapeType.POLYGONZ
&& input.getShapeType() != ShapeType.POLYGONM) {
showFeedback("The input shapefile must be of a 'polyline' or "
+ "'polygon' data type.");
return;
}
// first sort the records based on their maxY coordinate. This will
// help reduce the amount of disc IO for larger rasters.
ArrayList<RecordInfo> myList = new ArrayList<RecordInfo>();
for (ShapeFileRecord record : input.records) {
i = record.getRecordNumber();
box = getBoundingBoxFromShapefileRecord(record);
myList.add(new RecordInfo(box.getMaxY(), i));
}
Collections.sort(myList);
long heapSize = Runtime.getRuntime().totalMemory();
int flushSize = (int) (heapSize / 32);
int j, numCellsToWrite;
PriorityQueue<RowPriorityGridCell> pq = new PriorityQueue<RowPriorityGridCell>(flushSize);
RowPriorityGridCell cell;
int numRecords = input.getNumberOfRecords();
int count = 0;
int progressCount = (int) (numRecords / 100.0);
if (progressCount <= 0) {
progressCount = 1;
}
progress = 0;
ShapeFileRecord record;
for (RecordInfo ri : myList) {
record = input.getRecord(ri.recNumber - 1);
geometry = getXYFromShapefileRecord(record);
numPoints = geometry.length;
numParts = partData.length;
for (part = 0; part < numParts; part++) {
box = new BoundingBox();
startingPointInPart = partData[part];
if (part < numParts - 1) {
endingPointInPart = partData[part + 1];
} else {
endingPointInPart = numPoints;
}
for (i = startingPointInPart; i < endingPointInPart; i++) {
if (geometry[i][0] < box.getMinX()) {
box.setMinX(geometry[i][0]);
}
if (geometry[i][0] > box.getMaxX()) {
box.setMaxX(geometry[i][0]);
}
if (geometry[i][1] < box.getMinY()) {
box.setMinY(geometry[i][1]);
}
if (geometry[i][1] > box.getMaxY()) {
box.setMaxY(geometry[i][1]);
}
}
topRow = DEM.getRowFromYCoordinate(box.getMaxY());
bottomRow = DEM.getRowFromYCoordinate(box.getMinY());
leftCol = DEM.getColumnFromXCoordinate(box.getMinX());
rightCol = DEM.getColumnFromXCoordinate(box.getMaxX());
// find each intersection with a row.
for (row = topRow; row <= bottomRow; row++) {
rowYCoord = DEM.getYCoordinateFromRow(row);
// find the x-coordinates of each of the line segments
// that intersect this row's y coordinate
for (i = startingPointInPart; i < endingPointInPart - 1; i++) {
if (isBetween(rowYCoord, geometry[i][1], geometry[i + 1][1])) {
y1 = geometry[i][1];
y2 = geometry[i + 1][1];
if (y2 != y1) {
x1 = geometry[i][0];
x2 = geometry[i + 1][0];
// calculate the intersection point
xPrime = x1 + (rowYCoord - y1) / (y2 - y1) * (x2 - x1);
col = DEM.getColumnFromXCoordinate(xPrime);
pq.add(new RowPriorityGridCell(row, col, increment));
}
}
}
}
// find each intersection with a column.
for (col = leftCol; col <= rightCol; col++) {
colXCoord = DEM.getXCoordinateFromColumn(col);
for (i = startingPointInPart; i < endingPointInPart - 1; i++) {
if (isBetween(colXCoord, geometry[i][0], geometry[i + 1][0])) {
x1 = geometry[i][0];
x2 = geometry[i + 1][0];
if (x1 != x2) {
y1 = geometry[i][1];
y2 = geometry[i + 1][1];
// calculate the intersection point
yPrime = y1 + (colXCoord - x1) / (x2 - x1) * (y2 - y1);
row = DEM.getRowFromYCoordinate(yPrime);
pq.add(new RowPriorityGridCell(row, col, increment));
}
}
}
}
}
if (pq.size() >= flushSize) {
j = 0;
numCellsToWrite = pq.size();
do {
cell = pq.poll();
output.setValue(cell.row, cell.col, DEM.getValue(cell.row, cell.col) + increment);
j++;
if (j % 1000 == 0) {
if (cancelOp) {
cancelOperation();
return;
}
updateProgress((int) (j * 100.0 / numCellsToWrite));
}
} while (pq.size() > 0);
}
if (cancelOp) {
cancelOperation();
return;
}
count++;
if (count % progressCount == 0) {
progress++;
updateProgress((int)progress);
}
}
j = 0;
numCellsToWrite = pq.size();
do {
cell = pq.poll();
output.setValue(cell.row, cell.col, DEM.getValue(cell.row, cell.col) + increment);
j++;
if (j % 1000 == 0) {
if (cancelOp) {
cancelOperation();
return;
}
updateProgress((int) (j * 100.0 / numCellsToWrite));
}
} while (pq.size() > 0);
output.flush();
double[] demData;
double[] outputData;
for (row = 0; row < rows; row++) {
demData = DEM.getRowValues(row);
outputData = output.getRowValues(row);
for (col = 0; col < cols; col++) {
if (outputData[col] == noData) {
output.setValue(row, col, demData[col]);
}
}
}
output.flush();
} else {
showFeedback("The input watershed file must be either a Whitebox raster or shapefile.");
return;
}
output.addMetadataEntry("Created by the "
+ getDescriptiveName() + " tool.");
output.addMetadataEntry("Created on " + new Date());
DEM.close();
output.close();
// returning a header file string displays the DEM.
returnData(outputHeader);
} catch (OutOfMemoryError oe) {
myHost.showFeedback("An out-of-memory error has occurred during operation.");
} catch (Exception e) {
myHost.showFeedback("An error has occurred during operation. See log file for details.");
myHost.logException("Error in " + getDescriptiveName(), e);
} finally {
updateProgress("Progress: ", 0);
// tells the main application that this process is completed.
amIActive = false;
myHost.pluginComplete();
}
}
int[] partData;
private double[][] getXYFromShapefileRecord(ShapeFileRecord record) {
double[][] ret;
ShapeType shapeType = record.getShapeType();
switch (shapeType) {
case POLYLINE:
whitebox.geospatialfiles.shapefile.PolyLine recPolyLine =
(whitebox.geospatialfiles.shapefile.PolyLine) (record.getGeometry());
ret = recPolyLine.getPoints();
partData = recPolyLine.getParts();
break;
case POLYLINEZ:
PolyLineZ recPolyLineZ = (PolyLineZ) (record.getGeometry());
ret = recPolyLineZ.getPoints();
partData = recPolyLineZ.getParts();
break;
case POLYLINEM:
PolyLineM recPolyLineM = (PolyLineM) (record.getGeometry());
ret = recPolyLineM.getPoints();
partData = recPolyLineM.getParts();
break;
case POLYGON:
Polygon recPolygon = (Polygon) (record.getGeometry());
ret = recPolygon.getPoints();
partData = recPolygon.getParts();
break;
case POLYGONZ:
PolygonZ recPolygonZ = (PolygonZ) (record.getGeometry());
ret = recPolygonZ.getPoints();
partData = recPolygonZ.getParts();
break;
case POLYGONM:
PolygonM recPolygonM = (PolygonM) (record.getGeometry());
ret = recPolygonM.getPoints();
partData = recPolygonM.getParts();
break;
default:
ret = new double[1][2];
ret[1][0] = -1;
ret[1][1] = -1;
break;
}
return ret;
}
private BoundingBox getBoundingBoxFromShapefileRecord(ShapeFileRecord record) {
BoundingBox ret;
ShapeType shapeType = record.getShapeType();
switch (shapeType) {
case POLYLINE:
whitebox.geospatialfiles.shapefile.PolyLine recPolyLine =
(whitebox.geospatialfiles.shapefile.PolyLine) (record.getGeometry());
return recPolyLine.getBox();
case POLYLINEZ:
PolyLineZ recPolyLineZ = (PolyLineZ) (record.getGeometry());
return recPolyLineZ.getBox();
case POLYLINEM:
PolyLineM recPolyLineM = (PolyLineM) (record.getGeometry());
return recPolyLineM.getBox();
case POLYGON:
Polygon recPolygon = (Polygon) (record.getGeometry());
return recPolygon.getBox();
case POLYGONZ:
PolygonZ recPolygonZ = (PolygonZ) (record.getGeometry());
return recPolygonZ.getBox();
case POLYGONM:
PolygonM recPolygonM = (PolygonM) (record.getGeometry());
return recPolygonM.getBox();
default:
return new BoundingBox(Double.NaN, Double.NaN, Double.NaN, Double.NaN);
}
}
private class RecordInfo implements Comparable<RecordInfo> {
public double maxY;
public int recNumber;
public RecordInfo(double maxY, int recNumber) {
this.maxY = maxY;
this.recNumber = recNumber;
}
@Override
public int compareTo(RecordInfo other) {
final int BEFORE = -1;
final int EQUAL = 0;
final int AFTER = 1;
if (this.maxY < other.maxY) {
return BEFORE;
} else if (this.maxY > other.maxY) {
return AFTER;
}
if (this.recNumber < other.recNumber) {
return BEFORE;
} else if (this.recNumber > other.recNumber) {
return AFTER;
}
return EQUAL;
}
}
// Return true if val is between theshold1 and theshold2.
private static boolean isBetween(double val, double threshold1, double threshold2) {
if (val == threshold1 || val == threshold2) {
return true;
}
return threshold2 > threshold1 ? val > threshold1 && val < threshold2 : val > threshold2 && val < threshold1;
}
}