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我試圖製作旋轉的敵人,只是向前移動。玩家完美展現,但由於某些原因,只有當我將旋轉設置爲360或0時,敵人才會顯示,儘管x和y的位置應該像他們應該的那樣移動。Java Graphics2D僅繪製旋轉0/360度
package Game;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
public class Enemy extends Rectangle implements GameObject {
private int speed;
private double angle;
public Enemy(int x, int y, int w, int h, int speed, int angle) {
this.x = x;
this.y = y;
this.width = w;
this.height = h;
this.speed = speed;
this.angle = Math.toRadians(angle);
}
@Override
public void update(Engine g) {
this.x += (speed * (float) Math.cos(angle));
this.y += (speed * (float) Math.sin(angle));
System.out.println(this.x + " " + this.y);
}
@Override
public void render(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
g2d.setColor(Color.red);
g2d.rotate(angle);
g2d.fill(this);
}
}
這是對'render'方法的遞歸調用 - 如果我不是忽視的東西,那麼這將導致'StackOverflowError'(或至少其他奇怪的行爲)。 – Marco13