因此,我正在制作一个平台游戏,您应该能够在其中拖动鼠标以从您的角色向鼠标释放方向发射弹丸,其速度为两点之间的距离。
public void mouseDragged(MouseEvent e) {
player.setAiming(true);
Point2D.Float aimpoint = new Point2D.Float(e.getXOnScreen(), e.getYOnScreen());
player.setAimpoint(aimpoint);
player.setAimDistance(GetDistanceToPoint(player.getPos(), aimpoint));
}
public static float GetAngleOfLine(Point2D.Float p1, Point2D.Float p2) {
double xDiff = p2.x - p1.x;
double yDiff = p2.y - p1.y;
System.out.println("P1X: " + p1.x + " P1Y: " + p1.y + " P2X: " + p2.x + " P2Y: " + p2.y + " Angle: " + Math.toDegrees(Math.atan2(yDiff, xDiff)));
return (float) Math.toDegrees(Math.atan2(yDiff, xDiff));
}
public static float GetDistanceToPoint(Point2D.Float p1, Point2D.Float p2){
float distance = (float) Math.sqrt(Math.pow(p2.y - p1.y, 2) + Math.pow((p2.x - p1.x), 2));
return distance;
}
然后,当鼠标松开时,
player.setAimingangle(GetAngleOfLine(player.getPos(), player.getAimpoint()));
然后创建一个射弹,其中角度为 player.aimingangle,强度为 player.aimingdistance:
float yvel = (float) (strength * Math.sin(angle));
float xvel = (float) (strength * Math.cos(angle));
我得到了令人难以置信的奇怪弹丸,它们到处飞。