root / branches / Mobile_Compatible_Hito_1 / libFMap / src / es / prodevelop / gvsig / mobile / fmap / driver / raster / google / GoogleUtils.java @ 21606
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package es.prodevelop.gvsig.mobile.fmap.driver.raster.google; |
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import java.awt.Image; |
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import java.awt.geom.Point2D; |
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import es.prodevelop.gvsig.mobile.fmap.util.ResourceReader; |
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public class GoogleUtils { |
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public static double SEMI_EQUATOR_LENGTH = 180.0; |
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public static Image GOOGLE_FORBIDDEN = ResourceReader.getResourceImage("img", "google_forbidden.png"); |
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public static Image NO_DATA = ResourceReader.getResourceImage("img", "nodata.png"); |
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public static GoogleMapsTile getTileFor(Point2D p, int depth) { |
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Point2D _p = normalize(p);
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GoogleMapsTile world = new GoogleMapsTile();
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for (int i=0; i<depth; i++) { |
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int q = qForPoint(world, _p);
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world.goToQ(q); |
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} |
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return world;
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} |
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public static Point2D normalize(Point2D p) { |
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if ((p.getX() >= -SEMI_EQUATOR_LENGTH) && (p.getX() <= SEMI_EQUATOR_LENGTH)
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&& (p.getY() >= -SEMI_EQUATOR_LENGTH) && (p.getY() <= SEMI_EQUATOR_LENGTH)) {
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return p;
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} |
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double tx = 0; |
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double ty = 0; |
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double x = 0, y = 0; |
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if (p.getX() > 0) { |
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tx = 1 + Math.floor((p.getX() - SEMI_EQUATOR_LENGTH) / (2 * SEMI_EQUATOR_LENGTH)); |
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x = p.getX() - (tx * (2 * SEMI_EQUATOR_LENGTH));
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} else {
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tx = -(1 + Math.floor((-p.getX() - SEMI_EQUATOR_LENGTH) / (2 * SEMI_EQUATOR_LENGTH))); |
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x = p.getX() - (tx * (2 * SEMI_EQUATOR_LENGTH));
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} |
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if (p.getY() > 0) { |
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ty = 1 + Math.floor((p.getY() - SEMI_EQUATOR_LENGTH) / (2 * SEMI_EQUATOR_LENGTH)); |
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y = p.getY() - (ty * (2 * SEMI_EQUATOR_LENGTH));
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} else {
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ty = -(1 + Math.floor((-p.getY() - SEMI_EQUATOR_LENGTH) / (2 * SEMI_EQUATOR_LENGTH))); |
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y = p.getY() - (ty * (2 * SEMI_EQUATOR_LENGTH));
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} |
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return new Point2D.Double(x, y); |
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} |
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public static int[] getDepthAndTileSize(double world_dist, int pixels) { |
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int[] resp = new int[2]; |
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double dist_per_pixel = world_dist / pixels;
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int d = 0; |
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while (dist_per_pixel < (2.0 * SEMI_EQUATOR_LENGTH / 256.0)) { |
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d++; |
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dist_per_pixel = 2 * dist_per_pixel;
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} |
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resp[0] = d;
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dist_per_pixel = 2.0 * SEMI_EQUATOR_LENGTH / dist_per_pixel;
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resp[1] = Math.round((float) dist_per_pixel); |
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return resp;
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} |
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private static int qForPoint(GoogleMapsTile t, Point2D p) { |
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double px = p.getX();
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double py = p.getY();
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double cx = t.getExtent().getCenterX();
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double cy = t.getExtent().getCenterY();
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if ((px <= cx) && (py <= cy)) return 0; |
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if ((px >= cx) && (py <= cy)) return 1; |
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if ((px >= cx) && (py >= cy)) return 2; |
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return 3; |
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} |
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} |