package solar;

import util.GameUtil;

import java.awt.*;

/**

• 星球的共同屬性
  */
  public class Star {//Star星
  Image img;
  double x,y;
  int width,height;

  //創建方法 :draw畫;Graphics制圖
  public void draw(Graphics g){//畫圖
  g.drawImage(img,(int)x,(int)y,null);

  }
  //2:創建空構造器
  public Star() {
  }
  //4:
  public Star(Image img) {
  this.img = img;
  //這樣也可以
  this.width = img.getWidth(null);
  this.height = img.getHeight(null);
  }
  //創建構造器 加載星圖片
  public Star(Image img, double x, double y) {
  this(img);//這樣也可以
  //this.img = img;
  this.x = x;
  this.y = y;
  }
  //獲取圖片路徑 用這個
  public Star(String imgpath,double x,double y){

  this(GameUtil.getImage(imgpath),x,y);

  }

  /public Star(Image img, double x, double y, int width, int height) {
  this.img = img;
  this.x = x;
  this.y = y;
  this.width = width;
  this.height = height;
  }/
  }
  //-----------------------------------------------------------
  package solar;

import util.GameUtil;

import java.awt.*;

/**

• Planet行星
  */
  public class Planet extends Star{//提示增加構造器
  //行星自己還有特點; 行星有橢圓運行,長軸,短軸,速度;圍繞某個星球運行
  Star center;//圍繞某個星球運行;center中心
  double longAxis;//橢圓長軸
  double shortAxis;//橢圓短軸
  double speed;//速度
  double degree;//角度
  //5:
  boolean satellite;//satellite衛星

  //3:這里重寫父類方法;Star()父類里有,這里需重寫;
  //5:
  public void draw(Graphics g) {
  //4: g.drawImage(img, (int) x, (int) y, null);//強制轉型
  super.draw(g);
  //5:x , y;移到move類//沿著橢圓軌跡飛行
  /* x = (center.x + center.width / 2) + longAxis * Math.cos(degree);
  y = (center.y + center.height / 2) + shortAxis * Math.sin(degree);
  //每次循環后變量逐漸增加
  degree += speed;
  */
  move();//調用
  //5:加判斷
  if(!satellite){
  drawTrace(g);
  }

  }

  //4:Trace軌跡
  public void drawTrace(Graphics g){
  double x2,y2,width2,height2;//橢圓的變量
  //算坐標
  width2 = longAxis2;
  height2 = shortAxis2;
  x2 = (center.x+center.width/2) - longAxis;
  y2 = (center.y+center.height/2)-shortAxis;

  //設顏色Color c = g.getColor();//原來的顏色g.setColor(Color.blue);//藍色g.drawOval((int)x2,(int)y2,(int)width2,(int)height2);//需要強轉g.setColor(c);

  }
  //4:創建新的方法;move 移動
  public void move(){
  //沿著橢圓軌跡飛行
  x = (center.x+center.width/2)+longAxisMath.cos(degree);
  y = (center.y+center.height/2)+shortAxisMath.sin(degree);
  //每次循環后變量逐漸增加
  degree += speed;
  }
  //2:給上面屬性創建構造器;
  public Planet(Star center,String imgpath, double
  longAxis, double shortAxis, double speed) {
  super(GameUtil.getImage(imgpath));//super上級

  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);

  }
  //5:添加衛星后的構造器
  public Planet(Star center,String imgpath, double longAxis,
  double shortAxis, double speed,boolean satellite) {
  this(center, imgpath, longAxis, shortAxis, speed);
  this.satellite = satellite;
  }
  //5:創建構造器
  public Planet(Image img, double x, double y) {
  super(img, x, y);
  }
  //5:創建構造器
  public Planet(String imgpath, double x, double y) {//直接調用父類
  super(imgpath, x, y);//super上級
  }
  }
  //---------------------------------------------------------
  package solar;

import util.Constant;
import util.GameUtil;
import util.MyFrame;

import java.awt.*;

/**

• 太陽系主窗口
  */
  public class SolarFrame extends MyFrame {
  Image bg = GameUtil.getImage(“images/bg.jpg”);
  // 創建太陽對象;調用Constant常量類;Constant.GAME_WIDTH/2, Constant.GAME_HEIGHT/2:中心點
  Star sun = new Star(“images/sun.jpg”, Constant.GAME_WIDTH/2,Constant.GAME_HEIGHT/2);
  //earth地球
  Planet earth = new Planet(sun,“images/earth.jpg”, 150, 100, 0.1);
  //5:給地球添加衛星
  Planet moon = new Planet(earth,“images/moon.jpg”, 15, 30, 0.07,true);//去掉軌跡

  //5:添加行星 mars火星
  Planet mars = new Planet(sun,“images/Mars.jpg”, 200, 130, 0.09);
  //按照離太陽的距離從近到遠，它們依次為水星、金星、地球、火星、木星、土星、天王星、海王星。八大行星
  //6:水星
  Planet mercury = new Planet(sun,“images/mercury.jpg”, 100, 60, 0.2);
  //6:金星
  Planet venus = new Planet(sun,“images/venus.jpg”, 130, 80, 0.15);
  //6:木星
  Planet jupiter = new Planet(sun,“images/jupiter.jpg”, 220, 160, 0.08);
  //6:土星
  Planet saturn = new Planet(sun,“images/saturn.jpg”, 250, 200, 0.07);
  //6:天王星
  Planet uranus = new Planet(sun,“images/uranus.jpg”, 280, 220, 0.06);
  //6:海王星
  Planet neptune = new Planet(sun,“images/neptune.jpg”, 300, 250, 0.05);

  public void paint(Graphics g) {
  g.drawImage(bg, 0, 0, null);// 背景
  sun.draw(g);// 把背景傳進去
  earth.draw(g);

  //5:調用mars.draw(g);moon.draw(g);//6:mercury.draw(g);venus.draw(g);jupiter.draw(g);saturn.draw(g);uranus.draw(g);neptune.draw(g);

  }
  public static void main(String[] args) {
  new SolarFrame().launchFrame();

  }

}

//---------------------------------------

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