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interactive map problems

[1 Reply]
- 17-Jan-2013 11:38 AM
- Forum: Programming Questions
Hi,

i just leaned how to use this, and was trying to create a map which shows my friends current location.
obviously it's not a easy job.....

how can i
- create a mouse event: when mouseover the dot, my friends name shows up somewhere.
- to draw lines between the dots and mouse.
i tried:
1. line(p.x,p.y,mouseX,mouseY);
but it didn't really work.
here is the code of the sketch:
1. PImage backgroundMap;
2. float mapGeoLeft = -100; // Longitude 125 degrees west
3. float mapGeoRight = 153.44; // Longitude 153 degrees east
4. float mapGeoTop = 71.89; // Latitude 72 degrees north.
5. float mapGeoBottom = -80; // Latitude 56 degrees south.
7. float mapScreenWidth,mapScreenHeight; // Dimension of map in pixels.
10. void setup()
11. {
12. size(600,350);
13. textSize(10);
14. smooth();
15. noLoop();
16. backgroundMap = loadImage("world.jpg");
17. mapScreenWidth = width;
18. mapScreenHeight = height;
19. }
21. void draw()
22. {
23. image(backgroundMap,0,0,mapScreenWidth,mapScreenHeight);
24. stroke(204, 102, 0);
25. fill(255, 150);
26. strokeWeight(1);
28. PVector
29. p = geoToPixel(new PVector(0.8,51.5));
30. ellipse(p.x,p.y,5,5);
31. p = geoToPixel(new PVector(-82.0,39.5));
32. ellipse(p.x,p.y,5,5);
33. }
37. public PVector geoToPixel(PVector geoLocation)
38. {
39. return new PVector(mapScreenWidth*(geoLocation.x-mapGeoLeft)/(mapGeoRight-mapGeoLeft),
40. mapScreenHeight - mapScreenHeight*(geoLocation.y-mapGeoBottom)/(mapGeoTop-mapGeoBottom));
41. }
can anyone give some instruction plz

thx!!

greg.

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