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java太陽(yáng)系代碼 太陽(yáng)系的代碼

canvas做太陽(yáng)系怎樣才能讓地球繞著太陽(yáng)轉(zhuǎn)

今天研究的是利用HTML5的Canvas畫(huà)圖來(lái)模擬太陽(yáng)系運(yùn)轉(zhuǎn)，首先，在這個(gè)太陽(yáng)系里分為畫(huà)軌道和畫(huà)星球兩個(gè)部分，

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對(duì)于每一個(gè)星球我們要知道它的顏色和公轉(zhuǎn)周期，如下圖。

采用面向?qū)ο缶幊痰乃枷耄a如下

stars.html

[html] view plain copy

!DOCTYPE HTML

html

head/head

body

canvas id="canvas" width="1000" height="1000" style="background:#000"

你的瀏覽器不支持canvas標(biāo)簽！

/canvas

script src="stars.js"

/script

/body

/html

stars.js

[javascript] view plain copy

/******************************************/

/* */

/* 本節(jié)代碼體現(xiàn)了用JavaScript編寫(xiě)面向?qū)?*/

/* 象程序的思想，希望能認(rèn)真閱讀理解。 */

/* */

/******************************************/

//設(shè)置2d繪圖環(huán)境

var ctx = document.getElementById("canvas").getContext("2d");

//畫(huà)軌道

function drawTrack(){

for(var i = 0; i 8; i++){

ctx.beginPath();

ctx.arc(500, 500, (i + 1) * 50, 0, 360, false);

ctx.closePath();

ctx.strokeStyle = "#fff";

ctx.stroke();

}

}

//畫(huà)星球的類

function Star(x, y, radius, cycle, sColor, eColor){

//設(shè)置星球類的屬性

this.x = x; //星球的坐標(biāo)點(diǎn)

this.y = y;

this.radius = radius; //星球的半徑

this.cycle = cycle; //設(shè)置周期

this.sColor = sColor; //星球的顏色，起始顏色和結(jié)束顏色

this.eColor = eColor;

this.color = null;

//設(shè)置一個(gè)計(jì)時(shí)器

this.time = 0;

//給星球類定義一個(gè)方法

this.draw = function(){

ctx.save(); //保存之前的內(nèi)容

ctx.translate(500, 500); //重置0，0坐標(biāo)

ctx.rotate(this.time * (360 / this.cycle) * Math.PI / 180); //旋轉(zhuǎn)角度

//畫(huà)星球

ctx.beginPath();

ctx.arc(this.x, this.y, this.radius, 0, 360, false);

ctx.closePath();

//設(shè)置星球的填充顏色

this.color = ctx.createRadialGradient(this.x, this.y, 0, this.x, this.y, this.radius);

this.color.addColorStop(0, this.sColor);

this.color.addColorStop(1, this.eColor);

ctx.fillStyle = this.color;

ctx.fill();

//恢復(fù)之前畫(huà)布的內(nèi)容

ctx.restore();

this.time += 1;

}

}

//創(chuàng)建一個(gè)太陽(yáng)的構(gòu)造函數(shù)

function Sun(){

Star.call(this, 0, 0, 20, 0, "#FFFF00", "#FF9900");

}

//創(chuàng)建一個(gè)水星的構(gòu)造函數(shù)

function Mercury(){

Star.call(this, 0, -50, 10, 87.70, "#A69697", "#5C3E40");

}

//創(chuàng)建一個(gè)金星的構(gòu)造函數(shù)

function Venus(){

Star.call(this, 0, -100, 10, 224.701, "#C4BBAC", "#1F1315");

}

//創(chuàng)建一個(gè)地球的構(gòu)造函數(shù)

function Earth(){

Star.call(this, 0, -150, 10, 365.2422, "#78B1E8", "#050C12");

}

//創(chuàng)建一個(gè)火星的構(gòu)造函數(shù)

function Mars(){

Star.call(this, 0, -200, 10, 686.98, "#CEC9B6", "#76422D");

}

//創(chuàng)建一個(gè)木星的構(gòu)造函數(shù)

function Jupiter(){

Star.call(this, 0, -250, 10, 4332.589, "#C0A48E", "#322222");

}

//創(chuàng)建一個(gè)土星的構(gòu)造函數(shù)

function Saturn(){

Star.call(this, 0, -300, 10, 10759.5, "#F7F9E3", "#5C4533");

}

//創(chuàng)建一個(gè)天王星的構(gòu)造函數(shù)

function Uranus(){

Star.call(this, 0, -350, 10, 30799.095, "#A7E1E5", "#19243A");

}

//創(chuàng)建一個(gè)海王星的構(gòu)造函數(shù)

function Neptune(){

Star.call(this, 0, -400, 10, 60152, "#0661B2", "#1E3B73");

}

var sun = new Sun();

var mercury = new Mercury();

var venus = new Venus();

var earth = new Earth();

var mars = new Mars();

var jupiter = new Jupiter();

var saturn = new Saturn();

var uranus = new Uranus();

var neptune = new Neptune();

function Move(){

ctx.clearRect(0, 0, 1000, 1000);

drawTrack();

sun.draw();

mercury.draw();

venus.draw();

earth.draw();

mars.draw();

jupiter.draw();

saturn.draw();

uranus.draw();

neptune.draw();

}

setInterval(Move,10);

求用opengl做的 太陽(yáng)系的程序 太陽(yáng)系的幾個(gè)星球都有rendering的。而且他們都能轉(zhuǎn)起來(lái)

網(wǎng)上搞本紅寶書(shū)（opengl編程指南）及源碼。

照抄就行了，大概是第3章的一個(gè)例子。哈哈。

java大神幫我看下太陽(yáng)系代碼,為什么運(yùn)行起來(lái)畫(huà)面一閃一閃的,怎么才能正常不閃啊?

Thread.sleep(40); 隔40毫秒重畫(huà)(repaint)，這么快，當(dāng)然一閃一閃，你把時(shí)間放長(zhǎng)或者去掉sleep吧

java程序問(wèn)題？

public class Star {

private String name;

private int d;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getD() {

return d;

}

public void setD(int d) {

this.d = d;

}

public String introduce() {

return "Star{" +

"name='" + name + '\'' +

", d=" + d +

'}';

}

}

求java做動(dòng)畫(huà)代碼

import?java.awt.Canvas;

import?java.awt.Color;

import?java.awt.Dimension;

import?java.awt.EventQueue;

import?java.awt.Frame;

import?java.awt.Graphics;

import?java.awt.Graphics2D;

import?java.awt.Image;

import?java.awt.RenderingHints;

import?java.awt.event.KeyEvent;

import?java.awt.event.KeyListener;

import?java.awt.event.WindowAdapter;

import?java.awt.event.WindowEvent;

import?java.awt.image.BufferedImage;

import?java.io.File;

import?java.io.IOException;

import?javax.imageio.ImageIO;

public?class?TestImage?extends?Frame

{

private?static?final?long?serialVersionUID?=?1L;

private?static?boolean?PRESSED?=?false;

private?static?int?pointX?=?0;

private?static?int?pointy?=?200;

private?static?int?RIGHT_GO?=?0;

private?static?int?LEFT_GO?=?0;

private?static?int?DIR?=?0;

private?static?int?ANGLE?=?0;

private?static?int?W?=?50;

private?static?int?H?=?60;

private?_Canvas?canvas?=?null;

public?TestImage?()

{

add?(canvas?=?new?_Canvas?());

setIgnoreRepaint?(true);

requestFocus?();

}

public?class?_Canvas?extends?Canvas?implements?Runnable

{

private?static?final?long?serialVersionUID?=?1L;

private?BufferedImage?bi?=?null;

private?Image?bufferedImage?=?null;

private?Thread?thread?=?null;

private?long?sleepTime?=?10;

public?_Canvas?()

{

try

{

bi?=?ImageIO.read?(new?File?("go.png"));

}

catch?(IOException?e)

{}

setBackground?(Color.BLACK);

requestFocus?();

addKeyListener?(new?KeyListener?()

{

@Override

public?void?keyTyped?(?KeyEvent?e?)

{}

@Override

public?void?keyReleased?(?KeyEvent?e?)

{

RIGHT_GO?=?0;

PRESSED?=?false;

}

@Override

public?void?keyPressed?(?KeyEvent?e?)

{

//?38?40?37?39上下左右

DIR?=?e.getKeyCode?();

PRESSED?=?true;

}

});

}

@Override

public?void?paint?(?Graphics?g?)

{

Graphics2D?g2d?=?(Graphics2D)?g;

g2d.setRenderingHint?(RenderingHints.KEY_INTERPOLATION,?RenderingHints.VALUE_INTERPOLATION_BILINEAR);

g2d.drawImage?(rotateImage?(bi.getSubimage?(RIGHT_GO,?LEFT_GO,?W,?H),?ANGLE,?true),?pointX,?pointy,?W,?H,

this);

g2d.dispose?();

}

@Override

public?void?update?(?Graphics?g?)

{

if?(null?==?bufferedImage)

{

bufferedImage?=?createImage?(getWidth?(),?getHeight?());

}

Graphics?bufferedG?=?bufferedImage.getGraphics?();

bufferedG.clearRect?(0,?0,?getWidth?(),?getHeight?());

paint?(bufferedG);

bufferedG.dispose?();

g.drawImage?(bufferedImage,?0,?0,?this);

g.dispose?();

}

public?void?start?()

{

thread?=?new?Thread?(this);

thread.setName?("TestImage");

thread.setPriority?(Thread.MIN_PRIORITY);

thread.start?();

}

public?synchronized?void?stop?()

{

thread?=?null;

notify?();

}

@Override

public?void?run?()

{

Thread?me?=?Thread.currentThread?();

while?(thread?==?me??!isShowing?()?||?getSize?().width?==?0)

{

try

{

Thread.sleep?(555);

}

catch?(InterruptedException?e)

{

return;

}

}

while?(thread?==?me??isShowing?())

{

if?(PRESSED)

{

try

{

if?(DIR?==?39)

{

RIGHT_GO?=?RIGHT_GO?+?50;

LEFT_GO?=?0;

pointX?=?pointX?+?1;

if?(pointX??420)

{

ANGLE?=?90;

pointX--;

pointy--;

W?=?60;

H?=?50;

}

if?(RIGHT_GO??50)

{

RIGHT_GO?=?0;

}

}

else?if?(DIR?==?37)

{

pointX?=?pointX?-?1;

RIGHT_GO?=?RIGHT_GO?+?50;

LEFT_GO?=?60;

if?(pointX??0)

{

ANGLE?=?-90;

pointX++;

pointy--;

W?=?60;

H?=?50;

}

if?(RIGHT_GO??50)

{

RIGHT_GO?=?0;

}

}

else?if?(DIR?==?38)

{

W?=?50;

H?=?60;

pointy?=?150;

ANGLE?=?0;

RIGHT_GO?=?100;

}

else?if?(DIR?==?40)

{

W?=?50;

H?=?60;

ANGLE?=?0;

pointy?=?200;

RIGHT_GO?=?0;

}

Thread.sleep?(sleepTime);

repaint?();

}

catch?(InterruptedException?e)

{

break;

}

}

else

{

RIGHT_GO?=?RIGHT_GO?+?50;

LEFT_GO?=?0;

pointX?=?pointX?+?1;

if?(RIGHT_GO??50)

{

RIGHT_GO?=?0;

}

if?(pointX??500)

{

pointX?=?0;

}

try

{

Thread.sleep?(sleepTime);

repaint?();

}

catch?(InterruptedException?e)

{

break;

}

}

}

thread?=?null;

}

}

/**

?*?旋轉(zhuǎn)圖像為指定角度

?*?

?*?@param?degree

?*?@return

?*/

public?static?BufferedImage?rotateImage?(?final?BufferedImage?image,?final?int?angdeg,?final?boolean?d?)

{

int?w?=?image.getWidth?();

int?h?=?image.getHeight?();

int?type?=?image.getColorModel?().getTransparency?();

BufferedImage?img;

Graphics2D?graphics2d;

(?graphics2d?=?(?img?=?new?BufferedImage?(w,?h,?type)?).createGraphics?()?).setRenderingHint?(

RenderingHints.KEY_INTERPOLATION,?RenderingHints.VALUE_INTERPOLATION_BILINEAR);

graphics2d.rotate?(d???-Math.toRadians?(angdeg)?:?Math.toRadians?(angdeg),?w?/?2,?h?/?2);

graphics2d.drawImage?(image,?0,?0,?null);

graphics2d.dispose?();

return?img;

}

public?static?void?main?(?String[]?args?)

{

EventQueue.invokeLater?(new?Runnable?()

{

@Override

public?void?run?()

{

final?TestImage?ti?=?new?TestImage?();

ti.setSize?(new?Dimension?(500,?300));

ti.setLocationRelativeTo?(null);

ti.addWindowListener?(new?WindowAdapter?()

{

@Override

public?void?windowClosing?(?WindowEvent?e?)

{

System.exit?(0);

}

@Override

public?void?windowDeiconified?(?WindowEvent?e?)

{

ti.canvas.start?();

}

@Override

public?void?windowIconified?(?WindowEvent?e?)

{

ti.canvas.stop?();

}

});

ti.setResizable?(false);

ti.canvas.start?();

ti.setVisible?(true);

}

});

}

}


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