图形学作业（Java源码）

最新推荐文章于 2022-03-01 19:20:57 发布

oDon

最新推荐文章于 2022-03-01 19:20:57 发布

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文章标签：作业图形 java import class null

本文链接：https://blog.youkuaiyun.com/oDon/article/details/1842244

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博主分享了自己在大四期间为图形学课程所写的作业框架，使用Java编程。框架采用状态机设计，包括Main.java控制界面，GraphicsCanvas作为画板，JobSwitch用于作业内容切换，JobController管理作业，InfoPanel显示教学资料，BlankCanvas提供额外信息，GraphicsUtil包含具体图形实现函数。代码会持续更新，欢迎感兴趣的同学修改并分享新增内容。

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package com.odon.graphicsjob;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.font.FontRenderContext;

import java.awt.geom.Rectangle2D;

import javax.swing.JPanel;

class BlankCanvas extends JPanel {

Font font = new Font("SansSerif", Font.BOLD, 14);

FontRenderContext context = null;

private UIFrame uf = null;

String info = "Author : oDon";

public BlankCanvas(UIFrame _uf){

uf = _uf;

setPreferredSize(new Dimension(CANVAS_WIDTH, CANVAS_HEIGHT));

}

public void paintComponent(Graphics g)

{

super.paintComponent(g);

Graphics2D g2 = (Graphics2D)g;

context = g2.getFontRenderContext();

Rectangle2D bounds = font.getStringBounds(info, context);

g2.setColor(Color.ORANGE);

g2.setFont(font);

g2.drawString(info, BLANK, CANVAS_HEIGHT - (int) bounds.getHeight());

}

private static final int CANVAS_WIDTH = 1024;

private static final int CANVAS_HEIGHT = 40;

private static final int BLANK = 20;

}

最近甚是忙啊，大四临近毕业各种事情缠身啊。作业还是要做的，图形学是个很有意思的科目。老师布置的图形学作业，要按时完成。

想到还有几次图形学作业要交，所以写了一个框架。

下面公布下源码，框架已经写好了，采用状态机编写，Main.java包含了控制Layout的Frame, GraphicsCanvas是画板，JobSwitch是作业内容的切换，JobController是作业内容的控制，InfoPanel是作业内容的教学资料，BlankCanvas提供了一点信息，GraphicsUtil是作业实现的函数。

此代码将会不定期update,如果你有兴趣可以随便更改，每次更新GraphicsUtil里的几个函数添加响应的JButton就可以了，如果添加了新的图形学内容请发一份给我 yuanonline@hotmail.com

package com.odon.graphicsjob;

/**

* @author oDon

* @version 0.1

* @description Homework of <Basic of Computer Graphics>,include :

* <p>Bresenham Line</p>

* etc.

* The source code will update following the homework

* ---------------------------------------------------------------------

* | BlankCanvas(NORTH) |

* |

* |JobSwitch(WEST) GraphicsCanvas(CENTER) JobController(EAST) |

* | |

* | InfoPanel(SOUTH) |

* ----------------------------------------------------------------------

* */

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.Toolkit;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.font.FontRenderContext;

import java.awt.geom.Rectangle2D;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JMenu;

import javax.swing.JMenuBar;

import javax.swing.JMenuItem;

import javax.swing.JPanel;

public class Main {

/**

* @param args

public static void main(String[] args) {

UIFrame frame = new UIFrame();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setVisible(true);

}

class UIFrame extends JFrame {

private String title = "<Basic of Computer Graphics>";

private BlankCanvas bc = new BlankCanvas(this);

private GraphicsCanvas gc = new GraphicsCanvas(this);

private JobSwitch js = new JobSwitch(this);

private JobController jc = new JobController(this);

private InfoPanel infoPanel = new InfoPanel(this);

private JMenu sys;

private JMenu menu;

private JMenu about;

private JMenuBar jmb;

private JMenuItem[] oper;

private JMenuItem exit;

private JMenuItem aboutBMS;

private Thread infoThread = null;

private Thread canvasThread = null;

private int len = 6;

private short preState = 0;

private short curState = 0;

public UIFrame(){

setTitle(title);

Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();

setSize(screenSize);

initMenu();

setJMenuBar(jmb);

add(bc, BorderLayout.NORTH);

add(gc, BorderLayout.CENTER);

add(js, BorderLayout.WEST);

add(jc, BorderLayout.EAST);

add(infoPanel, BorderLayout.SOUTH);

infoThread = new Thread(infoPanel);

infoThread.start();

canvasThread = new Thread(gc);

canvasThread.start();

}

private void initMenu()

{

sys = new JMenu();

menu = new JMenu();

about = new JMenu();

jmb = new JMenuBar();

oper = new JMenuItem[len];

sys.setText("System");

menu.setText("Operation");

about.setText("About");

exit = new JMenuItem();

aboutBMS = new JMenuItem();

for(int i = 0; i < len; i++)

{

oper[i] = new JMenuItem();

}

oper[0].setText("draw Bresenham Line");

oper[1].setText("");

oper[2].setText("");

oper[3].setText("");

oper[4].setText("");

oper[5].setText("");

exit.setText("Quit");

aboutBMS.setText("About GT");

for(int i = 0; i < len; i++)

{

menu.add(oper[i]);

}

sys.add(exit);

about.add(aboutBMS);

jmb.add(sys);

jmb.add(menu);

jmb.add(about);

}

public boolean stateChanged()

{

curState = getCurrentState();

if(curState != preState)

{

preState = curState;

return true;

}

return false;

}

protected synchronized void setCurrentState(short currentState) {

curState = currentState;

}

protected synchronized short getCurrentState() {

return curState;

}

package com.odon.graphicsjob;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.Point;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import java.awt.event.MouseMotionListener;

import javax.swing.JPanel;

class GraphicsCanvas extends JPanel implements Runnable, MouseMotionListener,

MouseListener {

private UIFrame uf = null;

private GraphicsUtil gu = new GraphicsUtil();

Font font = new Font("SansSerif", Font.BOLD, 32);

private Point p = new Point();

private boolean clicked = false;

private int level = 20;

private int x = 0;

private int y = 0;

private int[] pointX = null;

private int[] pointY = null;

private int clickCount = 0;

private boolean drawBresen = false;

public GraphicsCanvas(UIFrame _uf){

uf = _uf;

pointX = new int[2];

pointY = new int[2];

setPreferredSize(new Dimension(CANVAS_WIDTH, CANVAS_HEIGHT));

this.addMouseListener(this);

this.addMouseMotionListener(this);

}

public void paintComponent(Graphics g)

{

super.paintComponent(g);

g.setColor(Color.ORANGE);

g.drawRect(0, 0, CANVAS_WIDTH, CANVAS_HEIGHT);

g.setColor(Color.DARK_GRAY);

for(int i = level; i < CANVAS_WIDTH; i+= level)

g.drawLine(i, 0, i, CANVAS_HEIGHT);

for(int i = level; i < CANVAS_HEIGHT; i+= level)

g.drawLine(0, i, CANVAS_WIDTH, i);

g.setColor(Color.MAGENTA);

g.setFont(font);

g.drawString("X:" + x / level + " Y:" + y / level, 0, 25);

switch(uf.getCurrentState())

{

case States.BRESENHAM:

g.drawString("Bresenham Line", CANVAS_WIDTH >> 1, 25);

if(drawBresen)

{

g.setColor(Color.ORANGE);

gu.drawBresenhamLine(g, pointX[0], pointY[0], pointX[1], pointY[1]);

g.drawString("(" + pointX[0] + "," + pointY[0] + ")", pointX[0],

pointY[0]);

g.drawString("(" + pointX[1] + "," + pointY[1]+ ")", pointX[1],

pointY[1]);

}

break;

}

clicked = false;

}

private static final int CANVAS_WIDTH = 800;

private static final int CANVAS_HEIGHT = 540;

@Override

public void run() {

while(true)

{

repaint();

try

{

Thread.sleep(100);

}

catch (InterruptedException e)

{

e.printStackTrace();

}

@Override

public void mouseClicked(MouseEvent e) {

switch(uf.getCurrentState())

{

case States.BRESENHAM:

{

pointX[clickCount%2] = x;

pointY[clickCount%2] = y;

clickCount++;

if((clickCount != 0) && (clickCount == 2))

{

drawBresen = true;

clickCount = 0;

}

else

drawBresen = false;

}

break;

}

@Override

public void mouseEntered(MouseEvent e) {

}

@Override

public void mouseExited(MouseEvent e) {

}

@Override

public void mousePressed(MouseEvent e) {

}

@Override

public void mouseReleased(MouseEvent e) {

}

@Override

public void mouseDragged(MouseEvent e) {

}

@Override

public void mouseMoved(MouseEvent e) {

x = e.getPoint().x;

y = e.getPoint().y;

}

package com.odon.graphicsjob;

import java.awt.Graphics;

public class GraphicsUtil {

public void drawPoint(Graphics g, int x, int y)

{

g.drawLine(x, y, x, y);

}

public void drawBresenhamLine(Graphics g, int stX, int stY, int edX, int edY)

{

int x = 0;

int y = 0;

int d = 0;

int dx =0;

int dy = 0;

int upIncre = 0;

int downIncre = 0;

if(stX > edX)

{

stX = stX ^ edX;

edX = stX ^ edX;

stX = edX ^ stX;

stY = stY ^ edY;

edY = stY ^ edY;

stY = edY ^ stY;

}

x = stX;

y = stY;

dx = edX - stX;

dy = edY - stY;

d = dx - (dy << 1);

upIncre = (dx - dy) << 1;

downIncre= -(dy << 1);

while(x < edX)

{

drawPoint(g, x, y);

x++;

if(d < 0)

{

y++;

d += upIncre;

}

else

d += downIncre;

}

package com.odon.graphicsjob;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.Graphics;

import javax.swing.JPanel;

class InfoPanel extends JPanel implements Runnable

{

private UIFrame uf = null;

private int width = 0;

private int width2 = 0;

private int height = 0;

private int len = 280;

private boolean draw1 = true;

public InfoPanel(UIFrame _uf)

{

uf = _uf;

this.setPreferredSize(new Dimension(1024, 100));

this.setBackground(Color.LIGHT_GRAY);

}

public void paintComponent(Graphics g)

{

super.paintComponent(g);

g.setFont(new Font("宋体", 1, 24));

g.setColor(new Color(0x3f7fff));

if(draw1)

{

g.drawString("添加讲解功能(未完善)", width, getHeight() >> 1);

}

width += 20;

if(width >= this.getWidth())

{

width = -len;

}

@Override

public void run() {

while(true)

{

try {

Thread.sleep(500);

} catch (InterruptedException e) {

e.printStackTrace();

}

this.repaint();

}

package com.odon.graphicsjob;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Graphics;

import javax.swing.JButton;

import javax.swing.JPanel;

class JobController extends JPanel {

private JButton refresh = new JButton("Refresh");

private UIFrame uf = null;

public JobController(UIFrame _uf){

uf = _uf;

setPreferredSize(new Dimension(WIDTH, HEIGHT));

setBackground(Color.LIGHT_GRAY);

add(refresh);

}

public void paintComponent(Graphics g)

{

super.paintComponent(g);

g.drawRect(0, 0, WIDTH, HEIGHT);

}

private static final int WIDTH = 110;

private static final int HEIGHT = 600;

}

package com.odon.graphicsjob;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JPanel;

class JobSwitch extends JPanel implements ActionListener {

private JButton bresen = new JButton("Bresenham");

private UIFrame uf = null;

public JobSwitch(UIFrame _uf){

uf = _uf;

setPreferredSize(new Dimension(WIDTH, HEIGHT));

setBackground(Color.LIGHT_GRAY);

add(bresen);

bresen.addActionListener(this);

}

public void paintComponent(Graphics g)

{

super.paintComponent(g);

g.drawRect(0, 0, WIDTH, HEIGHT);

}

private static final int WIDTH = 110;

private static final int HEIGHT = 600;

@Override

public void actionPerformed(ActionEvent e) {

Object source = e.getSource();

if(source == bresen){

uf.setCurrentState(States.BRESENHAM);

}

package com.odon.graphicsjob;

public class States {

public static final short INIT = 0;

public static final short BRESENHAM = 1;

}