Mega Code Archive
Returns distance between two sets of coords
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public class Util{
/**
* Returns distance between two 2D points
*
* @param point1
* first point
* @param point2
* second point
* @return distance between points
*/
public static double getDistance(Point point1, Point point2)
{
return getDistance(point1.x, point1.y, point2.x, point2.y);
}
/**
* Returns distance between two sets of coords
*
* @param x1
* first x coord
* @param y1
* first y coord
* @param x2
* second x coord
* @param y2
* second y coord
* @return distance between sets of coords
*/
public static double getDistance(float x1, float y1, float x2, float y2)
{
// using long to avoid possible overflows when multiplying
double dx = x2 - x1;
double dy = y2 - y1;
// return Math.hypot(x2 - x1, y2 - y1); // Extremely slow
// return Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)); // 20 times faster than hypot
return Math.sqrt(dx * dx + dy * dy); // 10 times faster then previous line
}
}
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