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The main purpose of this libraryis to modernize and maintain the slick2D library.

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package com.github.mathiewz.slick.util.pathfinding.navmesh;

/**
 * A link between this space and another
 *
 * @author kevin
 */
public class Link {
    /** The x coordinate of the joining point */
    private final float px;
    /** The y coordinate of the joining point */
    private final float py;
    /** The target space we'd be linking to */
    private final Space target;

    /**
     * Create a new link
     *
     * @param px
     *            The x coordinate of the linking point
     * @param py
     *            The y coordinate of the linking point
     * @param target
     *            The target space we're linking to
     */
    public Link(float px, float py, Space target) {
        this.px = px;
        this.py = py;
        this.target = target;
    }

    /**
     * Get the distance squared from this link to the given position
     *
     * @param tx
     *            The x coordinate of the target location
     * @param ty
     *            The y coordinate of the target location
     * @return The distance squared from this link to the target
     */
    public float distance2(float tx, float ty) {
        float dx = tx - px;
        float dy = ty - py;

        return dx * dx + dy * dy;
    }

    /**
     * Get the x coordinate of the link
     *
     * @return The x coordinate of the link
     */
    public float getX() {
        return px;
    }

    /**
     * Get the y coordinate of the link
     *
     * @return The y coordinate of the link
     */
    public float getY() {
        return py;
    }

    /**
     * Get the space this object links to
     *
     * @return The space this object links to
     */
    public Space getTarget() {
        return target;
    }
}