/**
* Convert the given pixel coordinates, whose origin is at the top-left of a tile's containing
* rectangle, to fine coordinates within that tile. Converted coordinates are placed in the given
* point object.
*
* @param x the x-position pixel coordinate.
* @param y the y-position pixel coordinate.
* @param fpos the point object to place coordinates in.
*/
public static void pixelToFine(MisoSceneMetrics metrics, int x, int y, Point fpos) {
// calculate line parallel to the y-axis (from the given
// x/y-pos to the x-axis)
float bY = y - (metrics.fineSlopeY * x);
// determine intersection of x- and y-axis lines
int crossx = (int) ((bY - metrics.fineBX) / (metrics.fineSlopeX - metrics.fineSlopeY));
int crossy = (int) ((metrics.fineSlopeY * crossx) + bY);
// TODO: final position should check distance between our
// position and the surrounding fine coords and return the
// actual closest fine coord, rather than just dividing.
// determine distance along the x-axis
float xdist = MathUtil.distance(metrics.tilehwid, 0, crossx, crossy);
fpos.x = (int) (xdist / metrics.finelen);
// determine distance along the y-axis
float ydist = MathUtil.distance(x, y, crossx, crossy);
fpos.y = (int) (ydist / metrics.finelen);
// Log.info("Pixel to fine " + StringUtil.coordsToString(x, y) +
// " -> " + StringUtil.toString(fpos) + ".");
}
