Function geohashGetDistanceIfInRectangle

app/redis-6.2.6/src/geohash_helper.c:254–263

Judge whether a point is in the axis-aligned rectangle, when the distance * between a searched point and the center point is less than or equal to * height/2 or width/2 in height and width, the point is in the rectangle. * * width_m, height_m: the rectangle * x1, y1 : the center of the box * x2, y2 : the point to be searched */

 * x2, y2 : the point to be searched
 */
int geohashGetDistanceIfInRectangle(double width_m, double height_m, double x1, double y1,
                                    double x2, double y2, double *distance) {
    double lon_distance = geohashGetDistance(x2, y2, x1, y2);
    double lat_distance = geohashGetDistance(x2, y2, x2, y1);
    if (lon_distance > width_m/2 || lat_distance > height_m/2) {
        return 0;
    }
    *distance = geohashGetDistance(x1, y1, x2, y2);
    return 1;
}