Java 基于按键旋转图像
我试图修改一个现有代码,根据按键旋转图像。到目前为止,我已经成功地做到了以下几点,我被卡住了。我第一次使用仿射变换。当图像的旋转次数与按下右键的次数相同时,图像仅旋转一次Java 基于按键旋转图像,java,swing,rotation,keylistener,key-bindings,Java,Swing,Rotation,Keylistener,Key Bindings,我试图修改一个现有代码,根据按键旋转图像。到目前为止,我已经成功地做到了以下几点,我被卡住了。我第一次使用仿射变换。当图像的旋转次数与按下右键的次数相同时,图像仅旋转一次 package aircraftPackage; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Image; import java.awt.MediaTracker; import java.awt.event.KeyEvent;
package aircraftPackage;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
public class RotateImage extends JFrame implements KeyListener {
private static final long serialVersionUID = 1L;
private Image TestImage;
private BufferedImage bf;
private int cordX = 100;
private int cordY = 100;
private double currentAngle;
public RotateImage(Image TestImage) {
this.TestImage = TestImage;
MediaTracker mt = new MediaTracker(this);
mt.addImage(TestImage, 0);
try {
mt.waitForID(0);
}
catch (Exception e) {
e.printStackTrace();
}
setTitle("Testing....");
setSize(500, 500);
imageLoader();
setVisible(true);
}
public void rotate() {
//rotate 5 degrees at a time
currentAngle+=5.0;
if (currentAngle >= 360.0) {
currentAngle = 0;
}
repaint();
}
public void imageLoader() {
try {
String testPath = "test.png";
TestImage = ImageIO.read(getClass().getResourceAsStream(testPath));
} catch (IOException ex) {
ex.printStackTrace();
}
addKeyListener(this);
}
public void update(Graphics g){
paint(g);
}
public void paint(Graphics g){
bf = new BufferedImage( this.getWidth(),this.getHeight(), BufferedImage.TYPE_INT_RGB);
try{
animation(bf.getGraphics());
g.drawImage(bf,0,0,null);
}catch(Exception ex){
}
}
public void animation(Graphics g) {
super.paint(g);
Graphics2D g2d = (Graphics2D)g;
AffineTransform origXform = g2d.getTransform();
AffineTransform newXform = (AffineTransform)(origXform.clone());
//center of rotation is center of the panel
int xRot = this.getWidth()/2;
int yRot = this.getHeight()/2;
newXform.rotate(Math.toRadians(currentAngle), xRot, yRot);
g2d.setTransform(newXform);
//draw image centered in panel
int x = (getWidth() - TestImage.getWidth(this))/2;
int y = (getHeight() - TestImage.getHeight(this))/2;
g2d.drawImage(TestImage, x, y, this);
g2d.setTransform(origXform);
g.drawImage(TestImage, cordX, cordY, this);
}
public static void main(String[] args) {
new RotateImage(null);
}
public void keyPressed(KeyEvent ke) {
final RotateImage ri = new RotateImage(TestImage);
switch (ke.getKeyCode()) {
case KeyEvent.VK_RIGHT: {
cordX += 5;
ri.rotate();
}
break;
case KeyEvent.VK_LEFT: {
cordX -= 5;
}
break;
case KeyEvent.VK_DOWN: {
cordY += 5;
}
break;
case KeyEvent.VK_UP: {
cordY -= 3;
}
break;
}
repaint();
}
public void keyTyped(KeyEvent ke) {
}
public void keyReleased(KeyEvent ke) {
}
}
如果有人能纠正我在哪里犯的错误,我会很有帮助的。
感谢您在每个事件关键点上创建新的旋转图像时遇到的问题,使其看起来不起作用 尝试在每个关键事件上将此行的位置更改为不可修改
public static void main(String[] args) {
new RotateImage(null);
}
public void keyPressed(KeyEvent ke) {
final RotateImage ri = new RotateImage(TestImage);
更新:
原因是构造函数的值为null,所以应该传递image
new RotateImage(null);
在代码中修改此选项
1) 让它静止
private static Image TestImage;
2) 定义
3) 像这样打电话进来
public static void main(String[] args) {
ri = new RotateImage(TestImage);
}
步骤4(已删除)
更新:
更新2:
这是完整的代码,它工作得非常完美(右键)不要忘记将图像包含在同一个包中,并且图像类型相同
package aircraftPackage;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
public class RotateImage extends JFrame implements KeyListener {
private static final long serialVersionUID = 1L;
private static Image TestImage;
private static RotateImage ri;
private BufferedImage bf;
private int cordX = 100;
private int cordY = 100;
private double currentAngle;
public RotateImage(Image TestImage) {
this.TestImage = TestImage;
MediaTracker mt = new MediaTracker(this);
mt.addImage(TestImage, 0);
try {
mt.waitForID(0);
}
catch (Exception e) {
e.printStackTrace();
}
setTitle("Testing....");
setSize(500, 500);
imageLoader();
setVisible(true);
}
public void rotate() {
//rotate 5 degrees at a time
currentAngle+=5.0;
if (currentAngle >= 360.0) {
currentAngle = 0;
}
repaint();
}
public void imageLoader() {
try {
String testPath = "test.png";
TestImage = ImageIO.read(getClass().getResourceAsStream(testPath));
} catch (IOException ex) {
ex.printStackTrace();
}
addKeyListener(this);
}
public void update(Graphics g){
paint(g);
}
public void paint(Graphics g){
bf = new BufferedImage( this.getWidth(),this.getHeight(), BufferedImage.TYPE_INT_RGB);
try{
animation(bf.getGraphics());
g.drawImage(bf,0,0,null);
}catch(Exception ex){
}
}
public void animation(Graphics g) {
super.paint(g);
Graphics2D g2d = (Graphics2D)g;
AffineTransform origXform = g2d.getTransform();
AffineTransform newXform = (AffineTransform)(origXform.clone());
//center of rotation is center of the panel
int xRot = this.getWidth()/2;
int yRot = this.getHeight()/2;
newXform.rotate(Math.toRadians(currentAngle), xRot, yRot);
g2d.setTransform(newXform);
//draw image centered in panel
int x = (getWidth() - TestImage.getWidth(this))/2;
int y = (getHeight() - TestImage.getHeight(this))/2;
g2d.drawImage(TestImage, x, y, this);
g2d.setTransform(origXform);
g.drawImage(TestImage, cordX, cordY, this);
}
public static void main(String[] args) {
ri = new RotateImage(TestImage);
}
public void keyPressed(KeyEvent ke) {
switch (ke.getKeyCode()) {
case KeyEvent.VK_RIGHT: {
cordX += 5;
ri.rotate();
}
break;
case KeyEvent.VK_LEFT: {
cordX -= 5;
ri.rotate();
}
break;
case KeyEvent.VK_DOWN: {
cordY += 5;
ri.rotate();
}
break;
case KeyEvent.VK_UP: {
cordY -= 3;
ri.rotate();
}
break;
}
repaint();
}
public void keyTyped(KeyEvent ke) {
}
public void keyReleased(KeyEvent ke) {
}
}
您在每个事件关键点上创建新的旋转图像时遇到的问题是,它看起来不起作用 尝试在每个关键事件上将此行的位置更改为不可修改
public static void main(String[] args) {
new RotateImage(null);
}
public void keyPressed(KeyEvent ke) {
final RotateImage ri = new RotateImage(TestImage);
更新:
原因是构造函数的值为null,所以应该传递image
new RotateImage(null);
在代码中修改此选项
1) 让它静止
private static Image TestImage;
2) 定义
3) 像这样打电话进来
public static void main(String[] args) {
ri = new RotateImage(TestImage);
}
步骤4(已删除)
更新:
更新2:
这是完整的代码,它工作得非常完美(右键)不要忘记将图像包含在同一个包中,并且图像类型相同
package aircraftPackage;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
public class RotateImage extends JFrame implements KeyListener {
private static final long serialVersionUID = 1L;
private static Image TestImage;
private static RotateImage ri;
private BufferedImage bf;
private int cordX = 100;
private int cordY = 100;
private double currentAngle;
public RotateImage(Image TestImage) {
this.TestImage = TestImage;
MediaTracker mt = new MediaTracker(this);
mt.addImage(TestImage, 0);
try {
mt.waitForID(0);
}
catch (Exception e) {
e.printStackTrace();
}
setTitle("Testing....");
setSize(500, 500);
imageLoader();
setVisible(true);
}
public void rotate() {
//rotate 5 degrees at a time
currentAngle+=5.0;
if (currentAngle >= 360.0) {
currentAngle = 0;
}
repaint();
}
public void imageLoader() {
try {
String testPath = "test.png";
TestImage = ImageIO.read(getClass().getResourceAsStream(testPath));
} catch (IOException ex) {
ex.printStackTrace();
}
addKeyListener(this);
}
public void update(Graphics g){
paint(g);
}
public void paint(Graphics g){
bf = new BufferedImage( this.getWidth(),this.getHeight(), BufferedImage.TYPE_INT_RGB);
try{
animation(bf.getGraphics());
g.drawImage(bf,0,0,null);
}catch(Exception ex){
}
}
public void animation(Graphics g) {
super.paint(g);
Graphics2D g2d = (Graphics2D)g;
AffineTransform origXform = g2d.getTransform();
AffineTransform newXform = (AffineTransform)(origXform.clone());
//center of rotation is center of the panel
int xRot = this.getWidth()/2;
int yRot = this.getHeight()/2;
newXform.rotate(Math.toRadians(currentAngle), xRot, yRot);
g2d.setTransform(newXform);
//draw image centered in panel
int x = (getWidth() - TestImage.getWidth(this))/2;
int y = (getHeight() - TestImage.getHeight(this))/2;
g2d.drawImage(TestImage, x, y, this);
g2d.setTransform(origXform);
g.drawImage(TestImage, cordX, cordY, this);
}
public static void main(String[] args) {
ri = new RotateImage(TestImage);
}
public void keyPressed(KeyEvent ke) {
switch (ke.getKeyCode()) {
case KeyEvent.VK_RIGHT: {
cordX += 5;
ri.rotate();
}
break;
case KeyEvent.VK_LEFT: {
cordX -= 5;
ri.rotate();
}
break;
case KeyEvent.VK_DOWN: {
cordY += 5;
ri.rotate();
}
break;
case KeyEvent.VK_UP: {
cordY -= 3;
ri.rotate();
}
break;
}
repaint();
}
public void keyTyped(KeyEvent ke) {
}
public void keyReleased(KeyEvent ke) {
}
}
似乎每次都在旋转同一个图像,因此它将始终仅旋转5度
编辑:哼,太晚了。见shareef post
似乎每次都在旋转同一个图像,因此它将始终仅旋转5度
编辑:哼,太晚了。请参阅shareef post。这正是我在发布此问题之前想要做的!!我还在尝试。如果我将“final RotateImage ri=new RotateImage(TestImage);”放在构造函数中,我会得到一个“java.lang.StackOverflowerError”。我希望它能工作,因为我缺少运行它的类;)谢谢你的帮助。我试过上面提到的东西。但它是一样的,图像只旋转一次。如果你提供了所有的源代码,我可以帮你,但我想问一下,你创建了这些类吗?你说的是哪些类?不,我没有完全创建这些类。哪些课程缺失?这正是我在发布这个问题之前想做的!!我还在尝试。如果我将“final RotateImage ri=new RotateImage(TestImage);”放在构造函数中,我会得到一个“java.lang.StackOverflowerError”。我希望它能工作,因为我缺少运行它的类;)谢谢你的帮助。我试过上面提到的东西。但它是一样的,图像只旋转一次。如果你提供了所有的源代码,我可以帮你,但我想问一下,你创建了这些类吗?你说的是哪些类?不,我没有完全创建这些类。缺了哪些课?