package cn.xia.solar;

import java.awt.Color;

import java.awt.Graphics;

import java.awt.Image;

import cn.xia.util.GameUtil;

public class Planet extends Star{

//除了图片坐标 行星沿着某个椭圆运行:长轴,短轴,速度,角度; 绕着某个Star.

double longAxis;

double shortAxis;

double speed;

double degree;

Star center;

boolean satellite;

public Planet(Star center,String imgpath, double longAxis, double shortAxis, double speed,boolean satellite) {

this(center, imgpath, longAxis, shortAxis, speed);

this.satellite = satellite;

}

public Planet(Star center,String imgpath, double longAxis, double shortAxis, double speed) {

super(GameUtil.getImage(imgpath));

this.center = center;

this.x=center.x+longAxis;

this.y=center.y;

this.longAxis = longAxis;

this.shortAxis = shortAxis;

this.speed = speed;

this.width = img.getWidth(null);

this.height = img.getHeight(null);

}

public void draw(Graphics g){

//g.drawImage(img,(int)x,(int)y,null);

super.draw(g);

//沿着椭圆轨迹飞行

if(!satellite){

//drawTrace(g);

}

move();

}

public void move(){

x=(center.x+15) + longAxis*Math.cos(degree);

y=(center.y+15) + shortAxis*Math.sin(degree);

degree +=speed;

}

public void drawTrace(Graphics g){

double ovalX,ovalY,ovalWidth,ovalHeigth;

ovalWidth=longAxis*2;

ovalHeigth= shortAxis*2;

ovalX=center.x-longAxis+15;

ovalY=center.y-shortAxis+15;

Color c = g.getColor();

g.setColor(Color.blue);

g.drawOval((int)ovalX, (int)ovalY, (int)ovalWidth, (int)ovalHeigth);

g.setColor(c);

}

public Planet(String imgpath, double x, double y) {

super(imgpath, x, y);

}

public Planet(Image img, double x, double y) {

super(img, x, y);

}

}