This sounds like it should be pretty easy, but it's been giving me trouble.  I'm trying create circles around many points (from a parsed .json file) onto a mask which is then applied to an unfolding map.   The trouble is that I can't figure out how to draw more than one circle at a time on the mask.  I have tried to do it with an array, but when I convert the lat/ lon coordinates into x/y coordinates with getScreenPositionFromLocation(); (line 53) and then split them into x and y coordinates, I'm not able to get the screen positions as an array.  

This is probably a pretty easy fix, but I'm really stuck.  Any help would be appreciated.

Thanks

seanmp

2. import org.json.*;
3. import processing.opengl.*;
4. import codeanticode.glgraphics.*;
5. import de.fhpotsdam.unfolding.*;
6. import de.fhpotsdam.unfolding.geo.*;
7. import de.fhpotsdam.unfolding.utils.*;
8. import de.fhpotsdam.unfolding.providers.*;
9. import de.fhpotsdam.unfolding.mapdisplay.MapDisplayFactory;
10. import de.fhpotsdam.unfolding.Map;
11. 
    
12. Map map1;
13. Map map2;
14. 
    
15. PGraphics topLayer, pg;
16. PImage mapimg;
17. int circleSize = 80;
18. 
    
19. float[] lats;
20. float[] lons;
21. 
    
22. void setup() {
23.   size(600, 600, P2D);
24.   background(0, 50, 0);
25.   map1 = new de.fhpotsdam.unfolding.Map(this, "map1", 0, 0, width, height, true, false, new Microsoft.AerialProvider());
26.   map1.setTweening(false);
27.   map2 = new de.fhpotsdam.unfolding.Map(this, "map2", 0, 0, width, height, true, false, //size of the map window
28.   new OpenStreetMap.CloudmadeProvider(MapDisplayFactory.OSM_API_KEY, 41315));  //for cloudmade, need api key and map # 
29.   map2.setTweening(false);
30. 
    
31.   MapUtils.createDefaultEventDispatcher(this, map1, map2);
32. 
    
33.   lats =new float[414];
34.   lons =new float[414];
35.   topLayer = createGraphics(width, height, P2D);
36. }
37. 
    
38. 
    
39. void draw() {
40.   PGraphics pg = map1.mapDisplay.getPG();
41.   map1.draw(); 
42.   map2.draw();
43.   topLayer.beginDraw();
44.   try {
45.     JSONObject waypointList = new JSONObject(join(loadStrings("get_gps_detail.json"), "")); 
46.     JSONArray gps = waypointList.getJSONArray("waypointList");
47.     for (int i = 0; i < gps.length(); i++) {
48.       JSONObject value = gps.getJSONObject(i); 
49.       float floatlat = (float)value.getDouble("lat"); 
50.       float floatlon = (float)value.getDouble("lon"); 
51.       lats[i] = floatlat;
52.       lons[i] = floatlon;
53.       Location manyloc = new Location(lats[i], lons[i]);   //where the trouble starts
54.       float xy[]=map1.getScreenPositionFromLocation(manyloc);
55.       topLayer.background(255);
56.       topLayer.noStroke();
57.       topLayer.fill(50);
58.       topLayer.ellipse(xy[0], xy[1], circleSize, circleSize);
59.     }
60.   } 
61.   catch (JSONException v) {
62.   }
63.   topLayer.endDraw();
64.   mapimg = pg.get(0, 0, width, height);
65.   mapimg.mask(topLayer);
66.   image(mapimg, 0, 0);
67. }