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Party-Parrots-At-Sea/src/main/java/seng302/controllers/CanvasController.java
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package seng302.controllers;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.concurrent.PriorityBlockingQueue;
import javafx.animation.AnimationTimer;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.fxml.FXML;
import javafx.geometry.Point2D;
import javafx.scene.Group;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.layout.AnchorPane;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import seng302.fxObjects.BoatGroup;
import seng302.models.Colors;
import seng302.models.Yacht;
import seng302.models.mark.GateMark;
import seng302.models.mark.Mark;
import seng302.fxObjects.MarkGroup;
import seng302.models.mark.MarkType;
import seng302.models.mark.SingleMark;
import seng302.models.stream.StreamParser;
import seng302.models.stream.XMLParser;
import seng302.models.stream.XMLParser.RaceXMLObject.Limit;
import seng302.models.stream.XMLParser.RaceXMLObject.Participant;
import seng302.models.stream.packets.BoatPositionPacket;
/**
* Created by ptg19 on 15/03/17.
* Modified by Haoming Yin (hyi25) on 20/3/2017.
*/
public class CanvasController {
@FXML
private AnchorPane canvasPane;
private RaceViewController raceViewController;
private ResizableCanvas canvas;
private Group group;
private GraphicsContext gc;
private final int MARK_SIZE = 10;
private final int BUFFER_SIZE = 50;
private final int CANVAS_WIDTH = 720;
private final int CANVAS_HEIGHT = 720;
private final int LHS_BUFFER = BUFFER_SIZE;
private final int RHS_BUFFER = BUFFER_SIZE + MARK_SIZE / 2;
private final int TOP_BUFFER = BUFFER_SIZE;
private final int BOT_BUFFER = TOP_BUFFER + MARK_SIZE / 2;
private boolean horizontalInversion = false;
private double distanceScaleFactor;
private ScaleDirection scaleDirection;
private Mark minLatPoint;
private Mark minLonPoint;
private Mark maxLatPoint;
private Mark maxLonPoint;
private double referencePointX;
private double referencePointY;
private List<MarkGroup> markGroups = new ArrayList<>();
private List<BoatGroup> boatGroups = new ArrayList<>();
//FRAME RATE
private Double frameRate = 60.0;
private final long[] frameTimes = new long[30];
private int frameTimeIndex = 0;
private boolean arrayFilled = false;
public AnimationTimer timer;
private enum ScaleDirection {
HORIZONTAL,
VERTICAL
}
public void setup(RaceViewController raceViewController){
this.raceViewController = raceViewController;
}
public void initialize() {
raceViewController = new RaceViewController();
canvas = new ResizableCanvas();
group = new Group();
canvasPane.getChildren().add(canvas);
canvasPane.getChildren().add(group);
// Bind canvas size to stack pane size.
canvas.widthProperty().bind(new SimpleDoubleProperty(CANVAS_WIDTH));
canvas.heightProperty().bind(new SimpleDoubleProperty(CANVAS_HEIGHT));
}
public void initializeCanvas (){
gc = canvas.getGraphicsContext2D();
gc.save();
gc.setFill(Color.SKYBLUE);
gc.fillRect(0,0, CANVAS_WIDTH, CANVAS_HEIGHT);
gc.restore();
fitMarksToCanvas();
// TODO: 1/05/17 wmu16 - Change this call to now draw the marks as from the xml
initializeBoats();
initializeMarks();
timer = new AnimationTimer() {
@Override
public void handle(long now) {
//fps stuff
long oldFrameTime = frameTimes[frameTimeIndex] ;
frameTimes[frameTimeIndex] = now ;
frameTimeIndex = (frameTimeIndex + 1) % frameTimes.length ;
if (frameTimeIndex == 0) {
arrayFilled = true ;
}
long elapsedNanos;
if (arrayFilled) {
elapsedNanos = now - oldFrameTime ;
long elapsedNanosPerFrame = elapsedNanos / frameTimes.length ;
frameRate = 1_000_000_000.0 / elapsedNanosPerFrame ;
drawFps(frameRate.intValue());
}
// TODO: 1/05/17 cir27 - Make the RaceObjects update on the actual delay.
elapsedNanos = 1000 / 60;
updateGroups();
if (StreamParser.isRaceFinished()) {
this.stop();
}
}
};
}
/**
* Adds border marks to the canvas, taken from the XML file
*
* NOTE: This is quite confusing as objects are grabbed from the XMLParser such as Mark and CompoundMark which are
* named the same as those in the model package but are, however not the same, so they do not have things such as
* a type and must be derived from the number of marks in a compound mark etc..
*/
private void addRaceBorder() {
XMLParser.RaceXMLObject raceXMLObject = StreamParser.getXmlObject().getRaceXML();
ArrayList<Limit> courseLimits = raceXMLObject.getCourseLimit();
gc.setStroke(Color.DARKBLUE);
gc.setLineWidth(3);
double[] xBoundaryPoints = new double[courseLimits.size()];
double[] yBoundaryPoints = new double[courseLimits.size()];
for (int i = 0; i < courseLimits.size() - 1; i++) {
Limit thisPoint1 = courseLimits.get(i);
SingleMark thisMark1 = new SingleMark("", thisPoint1.getLat(), thisPoint1.getLng(), thisPoint1.getSeqID());
Limit thisPoint2 = courseLimits.get(i+1);
SingleMark thisMark2 = new SingleMark("", thisPoint2.getLat(), thisPoint2.getLng(), thisPoint2.getSeqID());
Point2D borderPoint1 = findScaledXY(thisMark1);
Point2D borderPoint2 = findScaledXY(thisMark2);
gc.strokeLine(borderPoint1.getX(), borderPoint1.getY(),
borderPoint2.getX(), borderPoint2.getY());
xBoundaryPoints[i] = borderPoint1.getX();
yBoundaryPoints[i] = borderPoint1.getY();
}
Limit thisPoint1 = courseLimits.get(courseLimits.size()-1);
SingleMark thisMark1 = new SingleMark("", thisPoint1.getLat(), thisPoint1.getLng(), thisPoint1.getSeqID());
Limit thisPoint2 = courseLimits.get(0);
SingleMark thisMark2 = new SingleMark("", thisPoint2.getLat(), thisPoint2.getLng(), thisPoint2.getSeqID());
Point2D borderPoint1 = findScaledXY(thisMark1);
Point2D borderPoint2 = findScaledXY(thisMark2);
gc.strokeLine(borderPoint1.getX(), borderPoint1.getY(),
borderPoint2.getX(), borderPoint2.getY());
xBoundaryPoints[courseLimits.size()-1] = borderPoint1.getX();
yBoundaryPoints[courseLimits.size()-1] = borderPoint1.getY();
gc.setFill(Color.LIGHTBLUE);
gc.fillPolygon(xBoundaryPoints,yBoundaryPoints,yBoundaryPoints.length);
}
private void updateGroups(){
for (BoatGroup boatGroup : boatGroups) {
// some raceObjects will have multiple ID's (for instance gate marks)
//checking if the current "ID" has any updates associated with it
if (StreamParser.boatPositions.containsKey(boatGroup.getRaceId())) {
if (boatGroup.isStopped()) {
updateBoatGroup(boatGroup);
}
}
boatGroup.move();
}
for (MarkGroup markGroup : markGroups) {
for (Long id : markGroup.getRaceIds()) {
if (StreamParser.markPositions.containsKey(id)) {
updateMarkGroup(id, markGroup);
}
}
}
checkForCourseChanges();
}
private void checkForCourseChanges() {
if (StreamParser.isNewRaceXmlReceived()){
gc.setFill(Color.SKYBLUE);
gc.fillRect(0,0, CANVAS_WIDTH, CANVAS_HEIGHT);
gc.restore();
addRaceBorder();
canvas.toBack();
}
}
private void updateBoatGroup(BoatGroup boatGroup) {
PriorityBlockingQueue<BoatPositionPacket> movementQueue = StreamParser.boatPositions.get(boatGroup.getRaceId());
// giving the movementQueue a 5 packet buffer to account for slightly out of order packets
if (movementQueue.size() > 0){
try {
BoatPositionPacket positionPacket = movementQueue.take();
Point2D p2d = findScaledXY(positionPacket.getLat(), positionPacket.getLon());
double heading = 360.0 / 0xffff * positionPacket.getHeading();
boatGroup.setDestination(p2d.getX(), p2d.getY(), heading, positionPacket.getGroundSpeed(), positionPacket.getTimeValid(), frameRate, boatGroup.getRaceId());
} catch (InterruptedException e){
e.printStackTrace();
}
// }
}
}
void updateMarkGroup (long raceId, MarkGroup markGroup) {
PriorityBlockingQueue<BoatPositionPacket> movementQueue = StreamParser.markPositions.get(raceId);
if (movementQueue.size() > 0){
try {
BoatPositionPacket positionPacket = movementQueue.take();
Point2D p2d = findScaledXY(positionPacket.getLat(), positionPacket.getLon());
markGroup.moveMarkTo(p2d.getX(), p2d.getY(), raceId);
} catch (InterruptedException e){
e.printStackTrace();
}
}
}
/**
* Draws all the boats.
*/
private void initializeBoats() {
Map<Integer, Yacht> boats = StreamParser.getBoats();
Group boatAnnotations = new Group();
ArrayList<Participant> participants = StreamParser.getXmlObject().getRaceXML().getParticipants();
ArrayList<Integer> participantIDs = new ArrayList<>();
for (Participant p : participants) {
participantIDs.add(p.getsourceID());
}
for (Yacht boat : boats.values()) {
if (participantIDs.contains(boat.getSourceID())) {
boat.setColour(Colors.getColor());
BoatGroup boatGroup = new BoatGroup(boat, boat.getColour());
boatGroups.add(boatGroup);
boatAnnotations.getChildren().add(boatGroup.getLowPriorityAnnotations());
}
}
group.getChildren().add(boatAnnotations);
group.getChildren().addAll(boatGroups);
}
private void initializeMarks() {
ArrayList<Mark> allMarks = StreamParser.getXmlObject().getRaceXML().getCompoundMarks();
for (Mark mark : allMarks) {
if (mark.getMarkType() == MarkType.SINGLE_MARK) {
SingleMark sMark = (SingleMark) mark;
MarkGroup markGroup = new MarkGroup(sMark, findScaledXY(sMark));
markGroups.add(markGroup);
} else {
GateMark gMark = (GateMark) mark;
MarkGroup markGroup = new MarkGroup(gMark, findScaledXY(gMark.getSingleMark1()), findScaledXY(gMark.getSingleMark2())); //should be 2 objects in the list.
markGroups.add(markGroup);
}
}
group.getChildren().addAll(markGroups);
}
class ResizableCanvas extends Canvas {
ResizableCanvas() {
// Redraw canvas when size changes.
widthProperty().addListener(evt -> draw());
heightProperty().addListener(evt -> draw());
}
private void draw() {
double width = getWidth();
double height = getHeight();
GraphicsContext gc = getGraphicsContext2D();
gc.clearRect(0, 0, width, height);
}
@Override
public boolean isResizable() {
return true;
}
@Override
public double prefWidth(double height) {
return getWidth();
}
@Override
public double prefHeight(double width) {
return getHeight();
}
}
private void drawFps(int fps){
if (raceViewController.isDisplayFps()){
gc.clearRect(5,5,50,20);
gc.setFill(Color.SKYBLUE);
gc.fillRect(4,4,51,21);
gc.setFill(Color.BLACK);
gc.setFont(new Font(14));
gc.setLineWidth(3);
gc.fillText(fps + " FPS", 5, 20);
} else {
gc.clearRect(5,5,50,20);
gc.setFill(Color.SKYBLUE);
gc.fillRect(4,4,51,21);
}
}
/**
* Calculates x and y location for every marker that fits it to the canvas the race will be drawn on.
*/
private void fitMarksToCanvas() {
//Check is called once to avoid unnecessarily change the course limits once the race is running
StreamParser.isNewRaceXmlReceived();
findMinMaxPoint();
double minLonToMaxLon = scaleRaceExtremities();
calculateReferencePointLocation(minLonToMaxLon);
//givePointsXY();
addRaceBorder();
}
/**
* Sets the class variables minLatPoint, maxLatPoint, minLonPoint, maxLonPoint to the marker with the leftmost
* marker, rightmost marker, southern most marker and northern most marker respectively.
*/
private void findMinMaxPoint() {
List<Limit> sortedPoints = new ArrayList<>();
for (Limit limit : StreamParser.getXmlObject().getRaceXML().getCourseLimit()) {
sortedPoints.add(limit);
}
sortedPoints.sort(Comparator.comparingDouble(Limit::getLat));
Limit minLatMark = sortedPoints.get(0);
Limit maxLatMark = sortedPoints.get(sortedPoints.size()-1);
minLatPoint = new SingleMark(minLatMark.toString(), minLatMark.getLat(), minLatMark.getLng(), minLatMark.getSeqID());
maxLatPoint = new SingleMark(maxLatMark.toString(), maxLatMark.getLat(), maxLatMark.getLng(), maxLatMark.getSeqID());
sortedPoints.sort(Comparator.comparingDouble(Limit::getLng));
//If the course is on a point on the earth where longitudes wrap around.
Limit minLonMark = sortedPoints.get(0);
Limit maxLonMark = sortedPoints.get(sortedPoints.size()-1);
minLonPoint = new SingleMark(minLonMark.toString(), minLonMark.getLat(), minLonMark.getLng(), minLonMark.getSeqID());
maxLonPoint = new SingleMark(maxLonMark.toString(), maxLonMark.getLat(), maxLonMark.getLng(), maxLonMark.getSeqID());
if (maxLonPoint.getLongitude() - minLonPoint.getLongitude() > 180) {
horizontalInversion = true;
}
}
/**
* Calculates the location of a reference point, this is always the point with minimum latitude, in relation to the
* canvas.
*
* @param minLonToMaxLon The horizontal distance between the point of minimum longitude to maximum longitude.
*/
private void calculateReferencePointLocation (double minLonToMaxLon) {
Mark referencePoint = minLatPoint;
double referenceAngle;
if (scaleDirection == ScaleDirection.HORIZONTAL) {
referenceAngle = Math.abs(Mark.calculateHeadingRad(referencePoint, minLonPoint));
referencePointX = LHS_BUFFER + distanceScaleFactor * Math.sin(referenceAngle) * Mark.calculateDistance(referencePoint, minLonPoint);
referenceAngle = Math.abs(Mark.calculateHeadingRad(referencePoint, maxLatPoint));
referencePointY = CANVAS_HEIGHT - (TOP_BUFFER + BOT_BUFFER);
referencePointY -= distanceScaleFactor * Math.cos(referenceAngle) * Mark.calculateDistance(referencePoint, maxLatPoint);
referencePointY = referencePointY / 2;
referencePointY += TOP_BUFFER;
referencePointY += distanceScaleFactor * Math.cos(referenceAngle) * Mark.calculateDistance(referencePoint, maxLatPoint);
} else {
referencePointY = CANVAS_HEIGHT - BOT_BUFFER;
referenceAngle = Math.abs(Mark.calculateHeadingRad(referencePoint, minLonPoint));
referencePointX = LHS_BUFFER;
referencePointX += distanceScaleFactor * Math.sin(referenceAngle) * Mark.calculateDistance(referencePoint, minLonPoint);
referencePointX += ((CANVAS_WIDTH - (LHS_BUFFER + RHS_BUFFER)) - (minLonToMaxLon * distanceScaleFactor)) / 2;
}
if(horizontalInversion) {
referencePointX = CANVAS_WIDTH - RHS_BUFFER - (referencePointX - LHS_BUFFER);
}
}
/**
* Finds the scale factor necessary to fit all race markers within the onscreen map and assigns it to distanceScaleFactor
* Returns the max horizontal distance of the map.
*/
private double scaleRaceExtremities () {
double vertAngle = Math.abs(Mark.calculateHeadingRad(minLatPoint, maxLatPoint));
double vertDistance = Math.cos(vertAngle) * Mark.calculateDistance(minLatPoint, maxLatPoint);
double horiAngle = Mark.calculateHeadingRad(minLonPoint, maxLonPoint);
if (horiAngle <= (Math.PI / 2))
horiAngle = (Math.PI / 2) - horiAngle;
else
horiAngle = horiAngle - (Math.PI / 2);
double horiDistance = Math.cos(horiAngle) * Mark.calculateDistance(minLonPoint, maxLonPoint);
double vertScale = (CANVAS_HEIGHT - (TOP_BUFFER + BOT_BUFFER)) / vertDistance;
if ((horiDistance * vertScale) > (CANVAS_WIDTH - (RHS_BUFFER + LHS_BUFFER))) {
distanceScaleFactor = (CANVAS_WIDTH - (RHS_BUFFER + LHS_BUFFER)) / horiDistance;
scaleDirection = ScaleDirection.HORIZONTAL;
} else {
distanceScaleFactor = vertScale;
scaleDirection = ScaleDirection.VERTICAL;
}
return horiDistance;
}
private Point2D findScaledXY (Mark unscaled) {
return findScaledXY (unscaled.getLatitude(), unscaled.getLongitude());
}
private Point2D findScaledXY (double unscaledLat, double unscaledLon) {
double distanceFromReference;
double angleFromReference;
int xAxisLocation = (int) referencePointX;
int yAxisLocation = (int) referencePointY;
angleFromReference = Mark.calculateHeadingRad(minLatPoint.getLatitude(), minLatPoint.getLongitude(), unscaledLat, unscaledLon);
distanceFromReference = Mark.calculateDistance(minLatPoint.getLatitude(), minLatPoint.getLongitude(), unscaledLat, unscaledLon);
if (angleFromReference >= 0 && angleFromReference <= Math.PI / 2) {
xAxisLocation += (int) Math.round(distanceScaleFactor * Math.sin(angleFromReference) * distanceFromReference);
yAxisLocation -= (int) Math.round(distanceScaleFactor * Math.cos(angleFromReference) * distanceFromReference);
} else if (angleFromReference >= 0) {
angleFromReference = angleFromReference - Math.PI / 2;
xAxisLocation += (int) Math.round(distanceScaleFactor * Math.cos(angleFromReference) * distanceFromReference);
yAxisLocation += (int) Math.round(distanceScaleFactor * Math.sin(angleFromReference) * distanceFromReference);
} else if (angleFromReference < 0 && angleFromReference >= -Math.PI / 2) {
angleFromReference = Math.abs(angleFromReference);
xAxisLocation -= (int) Math.round(distanceScaleFactor * Math.sin(angleFromReference) * distanceFromReference);
yAxisLocation -= (int) Math.round(distanceScaleFactor * Math.cos(angleFromReference) * distanceFromReference);
} else {
angleFromReference = Math.abs(angleFromReference) - Math.PI / 2;
xAxisLocation -= (int) Math.round(distanceScaleFactor * Math.cos(angleFromReference) * distanceFromReference);
yAxisLocation += (int) Math.round(distanceScaleFactor * Math.sin(angleFromReference) * distanceFromReference);
}
if(horizontalInversion) {
xAxisLocation = CANVAS_WIDTH - RHS_BUFFER - (xAxisLocation - LHS_BUFFER);
}
return new Point2D(xAxisLocation, yAxisLocation);
}
List<BoatGroup> getBoatGroups() {
return boatGroups;
}
}
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