com.github.randomdwi.polygonclipping.segment.Segment Maven / Gradle / Ivy

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library for polygon clipping

There is a newer version: 1.0.2

package com.github.randomdwi.polygonclipping.segment;

import com.github.randomdwi.polygonclipping.geometry.Point;
import lombok.EqualsAndHashCode;

@EqualsAndHashCode
public class Segment {

    public Point pBegin;
    public Point pEnd;

    /**
     * Instantiates a new Segment.
     *
     * @param pBegin the p begin
     * @param pEnd   the p end
     */
    public Segment(Point pBegin, Point pEnd) {
        this.pBegin = pBegin;
        this.pEnd = pEnd;
    }

    /**
     * Change the segment orientation
     * @return the segment
     */
    public Segment changeOrientation() {
        Point tmp = pBegin;
        pBegin = pEnd;
        pEnd = tmp;
        return this;
    }

    /**
     * Return the point of the segment with lexicographically smallest coordinate
     * @return the point
     */
    public Point min() {
        return (pBegin.x < pEnd.x) || (pBegin.x == pEnd.x && pBegin.y < pEnd.y) ? pBegin : pEnd;
    }

    /**
     * Return the point of the segment with lexicographically largest coordinate
     * @return the point
     */
    public Point max() {
        return (pBegin.x > pEnd.x) || (pBegin.x == pEnd.x && pBegin.y > pEnd.y) ? pBegin : pEnd;
    }

    /**
     * Returns if the segment is degenerated.
     *
     * @return is segment degenerated?
     */
    public boolean degenerate() {
        return pBegin.equals(pEnd);
    }

    /**
     * Returns if the segment is vertical.
     *
     * @return is segment vertical?
     */
    public boolean isVertical() {
        return pBegin.x == pEnd.x;
    }
}