更新:semicomplex动画摇摆计时器= trainwreck . 问题的最终来源是java计时器,无论是swing还是实用程序版本 . 它们不可靠,尤其是在跨操作系统比较性能时 . 通过实施普通的线程,该程序在所有系统上运行都非常顺利 . http://zetcode.com/tutorials/javagamestutorial/animation/ . 此外,将Toolkit.getDefaultToolkit() . sync()添加到paintComponent()方法中会有显着的帮助 .
我写了一些在awt.Applet中动画流畅的代码(但是闪烁了),然后我将它重构为java swing . 现在它没有闪烁,但它看起来波涛汹涌 . 我搞砸了计时器,但这不起作用 . 任何有关平滑动画摆动组件的提示或建议都将非常感激 .
import java.util.Random;
import java.util.ArrayList;
import java.awt.event.;
import java.awt.;
import javax.swing.*;
//////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////
public class Ball extends JApplet{
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
JFrame frame = new JFrame();
frame.setTitle("And so the ball rolls");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
initContainer(frame);
frame.pack();
frame.setVisible(true);
}
});
}
public static void initContainer(Container container){
GraphicsPanel graphicsPanel = new GraphicsPanel();
MainPanel mainPanel = new MainPanel(graphicsPanel);
container.add(mainPanel);
graphicsPanel.startTimer();
}
@Override
public void init(){
initContainer(this);
}
}
///////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
class MainPanel extends JPanel {
JLabel label = new JLabel("Particles");
GraphicsPanel gPanel;
public MainPanel(GraphicsPanel gPanel){
this.gPanel = gPanel;
add(gPanel);
add(label);
}
}
///////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
class GraphicsPanel extends JPanel implements MouseListener {
private ArrayList<Particle> ballArr = new ArrayList<Particle>();
private String state="s"; //"s"=spiral, "p"=particle
private int speed=10; //~20 Hz
private Timer timer;
public GraphicsPanel(){
System.out.println("echo from gpanel");
setPreferredSize(new Dimension(500,500));
timer = new Timer(speed, new TimerListener());
addMouseListener(this);
}
public void startTimer(){
timer.start();
}
@Override
public void paintComponent(Graphics g){
super.paintComponent(g);
for (Particle b: ballArr){
g.setColor(b.getColor());
g.fillOval(b.getXCoor(),b.getYCoor(),
b.getTheSize(),b.getTheSize());
}
}
public void mousePressed(MouseEvent e) {
ballArr.add(new Particle(e.getX(), e.getY(), state));
}
public void mouseReleased(MouseEvent e) {}
public void mouseEntered(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mouseClicked(MouseEvent e) {}
class TimerListener implements ActionListener {
public void actionPerformed(ActionEvent e){
for (Particle b: ballArr)
b.move();
setBackground(Color.WHITE);
repaint();
}
}
}
//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
class Particle
{
private static int instanceCount; {{instanceCount++;}}
private int z = 11, t=1, u=1;
private int[] RGB = new int[3];
private int[] randomizeColor = new int[3];
private double radius, theta;
private int x, y, centerX, centerY, size, spiralDirection=1,
ballSizeLowerBound, ballSizeUpperBound,
radiusLowerBound, radiusUpperBound,
mouseInputX, mouseInputY,
radiusXMultiplier, radiusYMultiplier;
private Color color;
private String state;
private Random random = new Random();
///////////////////////////////////////////////////////////////////////////
public Particle(int x, int y, int centerX, int centerY, int radius,
int theta, int size, Color color){
this.x=x;this.y=y;this.centerX=centerX;this.centerY=centerY;
this.radius=radius;this.theta=theta;this.size=size;this.color=color;
}
public Particle(int mouseInputX, int mouseInputY, String state){
this.mouseInputX=mouseInputX;
this.mouseInputY=mouseInputY;
this.state=state;
//randomize color
RGB[0] = random.nextInt(252);
RGB[1] = random.nextInt(252);
RGB[2] = random.nextInt(252);
randomizeColor[0] = 1+random.nextInt(3);
randomizeColor[0] = 1+random.nextInt(3);
randomizeColor[0] = 1+random.nextInt(3);
centerX=mouseInputX;
centerY=mouseInputY;
if (state.equals("s")){ //setup spiral state
ballSizeLowerBound=5;
ballSizeUpperBound=18;
radiusLowerBound=0;
radiusUpperBound=50;
radiusXMultiplier=1;
radiusYMultiplier=1;
}
if (state.equals("p")){ //setup particle state
ballSizeLowerBound = 15;
ballSizeUpperBound =20 + random.nextInt(15);
radiusLowerBound = 5;
radiusUpperBound = 15+ random.nextInt(34);
radiusXMultiplier=1 + random.nextInt(3);
radiusYMultiplier=1 + random.nextInt(3);
}
size = ballSizeUpperBound-1; //ball size
radius = radiusUpperBound-1;
if (instanceCount %2 == 0) // alternate spiral direction
spiralDirection=-spiralDirection;
}
///////////////////////////////////////////////////////////////////////////
public int getXCoor(){return centerX+x*spiralDirection;}
public int getYCoor(){return centerY+y;}
public int getTheSize(){return size;}
public Color getColor(){return color;}
//////////////////////////////////////////////////////////////////////////
void move(){
//spiral: dr/dt changes at bounds
if (radius > radiusUpperBound || radius < radiusLowerBound)
u = -u;
//spiral shape formula: parametric equation for the
//polar equation radius = theta
x = (int) (radius * radiusXMultiplier * Math.cos(theta));
y = (int) (radius * radiusYMultiplier * Math.sin(theta));
radius += .1*u;
theta += .1;
//ball size formula
if (size == ballSizeUpperBound || size == ballSizeLowerBound)
t = -t;
size += t;
//ball colors change
for (int i = 0; i < RGB.length; i++)
if (RGB[i] >= 250 || RGB[i] <= 4)
randomizeColor[i] = -randomizeColor[i];
RGB[0]+= randomizeColor[0];
RGB[1]+= randomizeColor[1];
RGB[2]+= randomizeColor[2];
color = new Color(RGB[0],RGB[1],RGB[2]);
}
``}
1 回答
不要设置恒定间隔计时器 . 将计时器设置为关闭一次 - 在处理程序中
获取当前时间(保存在frameStartTime中)
做你的框架
将计时器设置为关闭:interval - (newCurrentTime - frameStartTime)
应该更顺畅 . 如果你想真正的专业(并留在Java),我认为你必须考虑JavaFX .