XY坐标两点插值（加密）计算（Java）_插值加密

已知两个点的坐标，这个两个点可以连成一条直线，目前在这条直线上按照固定距离进行插值，即增加更多点在这条直线上。

package com.demo.utils;

import lombok.Data;

import java.util.ArrayList;
import java.util.List;

/**
 * 两点插值计算
 *
 * @author elinx
 * @since 2021-09-24 14:05
 */
public class PointInterUtil {

    @Data
    public static class Point {
        private double x;
        private double y;
    }

    public static List<Point> interpolation(Point prePoint, Point curPoint) {

        double x0 = prePoint.getX();
        double y0 = prePoint.getY();
        double x1 = curPoint.getX();
        double y1 = curPoint.getY();

        double nDisX = Math.abs(x1 - x0);
        double nDisY = Math.abs(y1 - y0);

        List<Point> pointList = new ArrayList<>();

        double stepLength = 1.0;
        double rate = 1.0;
        if (nDisX >= nDisY) {
            //如果x轴方向距离较远，则以x轴坐标计算步长
            if (x0 > x1) {
                stepLength = -stepLength;
            }
            double xTemp = x0 + stepLength;
            for (; x0 > x1 ? xTemp > x1 : xTemp < x1; xTemp += stepLength) {
                double yTemp = rate * (y1 - y0) / (x1 - x0) * (xTemp - x0) + y0;
                Point point = new Point();
                point.setX(xTemp);
                point.setY(yTemp);
                pointList.add(point);
            }
        } else {
            //如果y轴方向距离较远，则以y轴坐标计算步长
            if (y0 > y1) {
                stepLength = -stepLength;
            }
            double yTemp = y0 + stepLength;
            for (; y0 > y1 ? yTemp > y1 : yTemp < y1; yTemp += stepLength) {
                double xTemp = rate * (yTemp - y0) * (x1 - x0) / (y1 - y0) + x0;
                Point point = new Point();
                point.setX(xTemp);
                point.setY(yTemp);
                pointList.add(point);
            }
        }
        return pointList;
    }

}

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