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POJava a moving animation (sprite)
 

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  1. POJava a moving animation (sprite)
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    <p>Hello i`ve got a problem: when i run this code i get this:</p> <p><img src="https://i.stack.imgur.com/pDoUT.jpg" alt="problem"> on some java forum they said i need to add Graphics2DObject.clearRect(x1, y1, x2, y2); (where`s x1 and y1 is coordinates of the image and x2 y2 is width height of the image.) when i add it to the code i get this:</p> <p><img src="https://i.stack.imgur.com/T2Z8V.jpg" alt="problem 2"></p> <p>The code(with added function):</p> <p>Main:</p> <pre><code>import java.awt.*; import javax.swing.*; public class Main { public static void main(String []args){ Main b = new Main(); b.run(); } private Sprite sprite; private Animation a; private ScreenManager s; public double sk = 0; private static final DisplayMode modes1[] = { new DisplayMode(800, 600, 32, DisplayMode.REFRESH_RATE_UNKNOWN), }; //load images and add scenes public void loadImages() { Image face1 = new ImageIcon("C:\\1.jpg").getImage(); Image face2 = new ImageIcon("C:\\2.jpg").getImage(); a = new Animation(); a.addScene(face1, 50); a.addScene(face2, 50); sprite = new Sprite(a); sprite.setVelocityX(0.3f); sprite.setVelocityY(0.3f); } //main method called from main public void run() { s = new ScreenManager(); try { DisplayMode dm = s.findFirstCompatibleMode(modes1); s.setFullScreen(dm); loadImages(); movieLoop(); }finally { s.restoreScreen(); } } //play movie public void movieLoop() { long startingTime = System.currentTimeMillis(); long cumTime = startingTime; while(cumTime - startingTime &lt; 5000) { long timePassed = System.currentTimeMillis() - cumTime; cumTime += timePassed; update(timePassed); //draw and update the screen Graphics2D g = s.getGraphics(); draw(g); g.dispose(); s.update(); try{ Thread.sleep(20); }catch(Exception ex) { System.err.println("Error: " + ex); } } } // Graphics with new function public void draw(Graphics g) { g.drawImage(sprite.getImage(), Math.round(sprite.getX()), Math.round(sprite.getY()), null); if(sk != 1){ g.clearRect(Math.round(sprite.getoX()),Math.round(sprite.getoY()),Math.round(sprite.getWidth()),Math.round(sprite.getHeight())); }else{ sk = 1; } } //update sprite public void update(long timePassed) { if(sprite.getX() &lt; 0) { sprite.setVelocityX(Math.abs(sprite.getVelocityX())); } else if (sprite.getX() + sprite.getWidth() &gt;= s.getWidth()) { sprite.setVelocityX(-Math.abs(sprite.getVelocityX())); } if(sprite.getY() &lt; 0) { sprite.setVelocityY(Math.abs(sprite.getVelocityY())); } else if (sprite.getY() + sprite.getHeight() &gt;= s.getHeight()) { sprite.setVelocityY(-Math.abs(sprite.getVelocityY())); } sprite.oldX(); sprite.oldY(); sprite.update(timePassed); } } </code></pre> <p>The sprite (movement class):</p> <pre><code>import java.awt.Image; public class Sprite { private Animation a; private float x; private float y; private float vx; private float vy; private float ox; private float oy; //Constructor public Sprite(Animation a) { this.a = a; } // Get old x and y to delete them later public void oldX(){ this.ox = x; } public void oldY(){ this.oy = y; } public float getoX(){ return ox; } public float getoY(){ return oy; } //Change position public void update(long timePassed) { x += vx * timePassed; y += vy * timePassed; a.update(timePassed); } //get x position public float getX() { return x; } //get y position public float getY() { return y; } //set x position public void setX(float x) { this.x = x; } //set y position public void setY(float y) { this.y = y; } // get sprite width public int getWidth() { return a.getImage().getWidth(null); } // get sprite height public int getHeight() { return a.getImage().getHeight(null); } //get horizontal velocity public float getVelocityX() { return vx; } //get vertical velocity public float getVelocityY() { return vy; } //set horizontal velocity public void setVelocityX(float vx) { this.vx = vx; } //set vertical velocity public void setVelocityY(float vy) { this.vy = vy; } //get sprite/image public Image getImage() { return a.getImage(); } } </code></pre> <p>Screen manager class:</p> <pre><code>import java.awt.*; import java.awt.image.BufferedImage; import java.awt.image.BufferStrategy; import javax.swing.JFrame; public class ScreenManager { private GraphicsDevice vc; //Constructor // give vc access to monitor screen public ScreenManager() { GraphicsEnvironment e = GraphicsEnvironment.getLocalGraphicsEnvironment(); vc = e.getDefaultScreenDevice(); } //get all compatible DM's public DisplayMode[] getCompatibleDisplayModes() { return vc.getDisplayModes(); } //compares DM passed in to vc and see if they match public DisplayMode findFirstCompatibleMode(DisplayMode modes[]) { DisplayMode goodModes[] = vc.getDisplayModes(); for(int x = 0; x &lt;modes.length; x++){ for(int y = 0; y &lt; goodModes.length; y++){ if(displayModesMatch(modes[x], goodModes[y])) { return modes[x]; } } } return null; } //get current DM public DisplayMode getCurrentDisplayMode() { return vc.getDisplayMode(); } //checks if two modes match each other public boolean displayModesMatch(DisplayMode m1, DisplayMode m2) { if(m1.getWidth() != m2.getWidth() || m1.getHeight() != m2.getHeight()) { return false; } if(m1.getBitDepth() != DisplayMode.BIT_DEPTH_MULTI &amp;&amp; m2.getBitDepth() != DisplayMode.BIT_DEPTH_MULTI &amp;&amp; m1.getBitDepth() != m2.getBitDepth()) { return false; } if(m1.getRefreshRate() != DisplayMode.REFRESH_RATE_UNKNOWN &amp;&amp; m2.getRefreshRate() != DisplayMode.REFRESH_RATE_UNKNOWN &amp;&amp; m1.getRefreshRate() != m2.getRefreshRate()) { return false; } return true; } //make frame full screen public void setFullScreen(DisplayMode dm) { JFrame f = new JFrame(); f.setUndecorated(true); f.setIgnoreRepaint(true); f.setResizable(false); vc.setFullScreenWindow(f); if(dm != null &amp;&amp; vc.isDisplayChangeSupported()) { try{ vc.setDisplayMode(dm); }catch(Exception e) {System.out.println("");} } f.createBufferStrategy(2); } //we will set Graphics object = to this public Graphics2D getGraphics() { Window w = vc.getFullScreenWindow(); if(w != null) { BufferStrategy s = w.getBufferStrategy(); return (Graphics2D)s.getDrawGraphics(); } else { return null; } } //updates display public void update() { Window w = vc.getFullScreenWindow(); if(w != null) { BufferStrategy s = w.getBufferStrategy(); if(!s.contentsLost()) { s.show(); } } } //returns full screen window public Window getFullScreenWindow() { return vc.getFullScreenWindow(); } //get width public int getWidth() { Window w = vc.getFullScreenWindow(); if(w != null) { return w.getWidth(); } else { return 0; } } //get height public int getHeight() { Window w = vc.getFullScreenWindow(); if(w != null) { return w.getHeight(); } else { return 0; } } //get out of full screen public void restoreScreen(){ Window w = vc.getFullScreenWindow(); if(w != null) { w.dispose(); vc.setFullScreenWindow(null); } } //create image compatible with monitor public BufferedImage createCompatibleImage(int w, int h, int t) { Window win = vc.getFullScreenWindow(); if(win != null) { GraphicsConfiguration gc = win.getGraphicsConfiguration(); return gc.createCompatibleImage(w, h, t); } return null; } }/////////END/////////// </code></pre> <p>Animation class</p> <pre><code>import java.util.ArrayList; import java.awt.Image; public class Animation { private ArrayList scenes; private int sceneIndex; private long movieTime; private long totalTime; //Constructor public Animation() { scenes = new ArrayList(); totalTime = 0; start(); } //add scenes to the array list and set time for each scene public synchronized void addScene(Image i, long t) { totalTime += t; scenes.add(new Onescene(i, totalTime)); } //start animation from beginning public synchronized void start() { movieTime = 0; sceneIndex = 0; } //change scenes public synchronized void update(long timePassed) { if(scenes.size() &gt; 1 ) { movieTime += timePassed; if(movieTime &gt;= totalTime) { movieTime = 0; sceneIndex = 0; } while(movieTime &gt; getScene(sceneIndex).endTime) { sceneIndex++; } } } //get animations current scene public synchronized Image getImage() { if(scenes.size() == 0) { return null; } else { return getScene(sceneIndex).pic; } } //get scene private Onescene getScene(int x) { return (Onescene)scenes.get(x); } /////PRIVAT INNER CLASS///// private class Onescene{ Image pic; long endTime; public Onescene(Image pic, long endTime) { this.pic = pic; this.endTime = endTime; } } }////END///// </code></pre> <p><strong>EDIT</strong>:</p> <p>Could someone try running this code ?</p> <p>Maybe You'll find the mistakes I made...</p>
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