package de.fhpotsdam.unfolding.performance;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import processing.core.PApplet;
import de.fhpotsdam.unfolding.UnfoldingMap;
import de.fhpotsdam.unfolding.events.MapEvent;
import de.fhpotsdam.unfolding.geo.Location;
import de.fhpotsdam.unfolding.utils.MapUtils;
import de.fhpotsdam.unfolding.utils.ScreenPosition;
/**
* Displays many markers on the map.
*
* Filters dots only on map change. Stores visible dots in a separate temp list, and displays those.
*
*/
public class MillionDotsMapApp2 extends PApplet {
UnfoldingMap map;
List<Dot> dots = new ArrayList<Dot>();
List<Dot> visibleDots = new ArrayList<Dot>();
Location tlLoc;
Location brLoc;
public void setup() {
size(800, 600, OPENGL);
smooth();
dots = createRandomDots(50000);
map = new UnfoldingMap(this);
map.zoomToLevel(3);
MapUtils.createDefaultEventDispatcher(this, map);
mapChanged(null);
}
public void draw() {
map.draw();
fill(0, 180);
noStroke();
synchronized (visibleDots) {
for (Dot dot : visibleDots) {
ScreenPosition pos = map.getScreenPosition(dot.location);
if (map.getZoomLevel() <= 4) {
rect(pos.x, pos.y, 4, 4);
} else {
// Draw more expensive representations on higher zoom levels (i.e. when fewer dots)
ellipse(pos.x, pos.y, 8, 8);
}
}
}
fill(255);
rect(5, 5, 180, 20);
fill(0);
text("fps: " + nfs(frameRate, 0, 2) + " (" + visibleDots.size() + " dots)", 10, 20);
}
public void mapChanged(MapEvent mapEvent) {
// println("mapChanged: " + mapEvent);
brLoc = map.getBottomRightBorder();
tlLoc = map.getTopLeftBorder();
synchronized (visibleDots) {
visibleDots.clear();
for (Dot dot : dots) {
if (dot.location.getLat() > brLoc.getLat() && dot.location.getLat() < tlLoc.getLat()
&& dot.location.getLon() > tlLoc.getLon() && dot.location.getLon() < brLoc.getLon()) {
visibleDots.add(dot);
}
}
}
}
private List<Dot> createRandomDots(int dotNumbers) {
List<Dot> dots = new ArrayList<Dot>();
for (int i = 0; i < dotNumbers; i++) {
Dot dot = new Dot(new Location(random(-85, 85), random(-180, 180)), new Date());
dots.add(dot);
}
return dots;
}
}