java - 如何填充由随机点创建的形状(drawLine)？

Question

我正在创建一个随机绘制小行星的游戏(使小行星呈现锯齿状外观)。经过研究，我只发现你可以填充原始形状。有谁知道我可以用来填充这些形状的方法？

package view.game_object;

import java.awt.Color;
import java.awt.Graphics;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Random;

public class Asteroid extends BaseGameObject {

   public static final int BASE_SIZE = 10;
   private final int fragmentCount;
   private final int[][] points;
   private final int level;

public Asteroid(int level, Random r) {
    this.level = level;
    this.setBound(level * Asteroid.BASE_SIZE);
    int sizeRange = (int) (this.getBound() / 2);
    this.fragmentCount = this.level * 6;
    // generate random points to draw
    this.setPosition(0, 0);
    this.points = new int[fragmentCount][2];
    ArrayList<Float> angleList = new ArrayList<>();
    for (int i = 0; i < fragmentCount; i++) {
        angleList.add(r.nextFloat() * (float) (Math.PI * 2));
    }
    Collections.sort(angleList);
    for (int i = 0; i < this.points.length; i++) {
        // base point
        float x = r.nextInt(sizeRange) + this.getBound() - sizeRange / 3;
        // rotate
        float[] point = BaseGameObject.rotate(x, 0, this.getPosx(), this.getPosy(),
                angleList.get(i));
        this.points[i][0] = (int) point[0];
        this.points[i][1] = (int) point[1];
    }
}

public int getLevel() {
    return level;
}

@Override
public void draw(Graphics g) {
    g.setColor(Color.gray);
    for (int i = 0; i < this.points.length; i++) {
        int nextPoint = i + 1;
        if (nextPoint >= this.points.length) {
            nextPoint = 0;
        }
        g.drawLine(Math.round(this.getPosx()) + this.points[i][0],
                Math.round(this.getPosy()) + this.points[i][1],
                Math.round(this.getPosx()) + this.points[nextPoint][0],
                Math.round(this.getPosy()) + this.points[nextPoint][1]
        );

    }
}
}

Answer 1

您可以使用Graphics methods to draw a polygon 。但你必须将你的点“转换”为正确的格式getXs()，我没有指出这一点，我很确定你可以尽我所能做到这一点=)

@Override
public void draw(Graphics g) {
    g.setColor(Color.gray); //fillColor
    int[] xPoints = getXs(this.points);
    int[] yPoints = getYs(this.points);
    int nPoints = xPoints.length;
    g.fillPolygon(xPoints, yPoints, nPoints);

}