实现“扫描线种子填充算法”完整代码(Java)
流程
下面是使用扫描线种子填充算法填充区域的基本步骤:
步骤 | 描述 |
---|---|
1 | 选择种子点(Seed Point),并将其加入种子点队列(Seed Queue) |
2 | 循环直到种子点队列为空: |
3 | 从队列中取出一个种子点 |
4 | 向上下左右四个方向扫描像素,并判断是否需要填充 |
5 | 如果需要填充,则填充该像素并将其加入种子点队列 |
代码实现
定义Seed类
public class Seed {
int x;
int y;
public Seed(int x, int y) {
this.x = x;
this.y = y;
}
}
扫描线种子填充算法实现
import java.util.LinkedList;
import java.util.Queue;
public class ScanLineSeedFill {
public static void seedFill(int[][] image, int seedX, int seedY, int fillColor) {
int width = image.length;
int height = image[0].length;
Queue<Seed> seedQueue = new LinkedList<>();
seedQueue.offer(new Seed(seedX, seedY));
while (!seedQueue.isEmpty()) {
Seed seed = seedQueue.poll();
int x = seed.x;
int y = seed.y;
if (x >= 0 && x < width && y >= 0 && y < height && image[x][y] != fillColor) {
image[x][y] = fillColor;
seedQueue.offer(new Seed(x + 1, y));
seedQueue.offer(new Seed(x - 1, y));
seedQueue.offer(new Seed(x, y + 1));
seedQueue.offer(new Seed(x, y - 1));
}
}
}
}
主函数示例
public class Main {
public static void main(String[] args) {
int[][] image = new int[10][10];
int seedX = 5;
int seedY = 5;
int fillColor = 1;
ScanLineSeedFill.seedFill(image, seedX, seedY, fillColor);
}
}
类图
classDiagram
class Seed {
int x
int y
Seed(int x, int y)
}
class ScanLineSeedFill {
+ seedFill(int[][] image, int seedX, int seedY, int fillColor)
}
class Main {
+ main(String[] args)
}
甘特图
gantt
title 扫描线种子填充算法实现时间表
section 初始化
Seed类实现 :done, des1, 2021-10-01, 2d
ScanLineSeedFill类实现 :done, des2, after des1, 3d
section 开发
Main函数示例代码编写 :active, a1, 2021-10-04, 2d
section 测试
测试代码功能 :a2, after a1, 3d
通过以上流程、代码实现和类图,我们可以很好地实现扫描线种子填充算法。希本这篇文章对你有所帮助,加油!