Improving Particles

src/GamePanel.java

@@ -42,6 +42,8 @@ public class GamePanel extends JPanel implements Runnable, KeyListener{
   //public static ArrayList<Tile>map = new ArrayList<Tile>();
 
   public static Tile[][]map = new Tile[300][18];
+
+  public static ArrayList<Tile>particleTiles = new ArrayList<Tile>();
   public static ArrayList<NonPlayer>enemy = new ArrayList<NonPlayer>();
 
   public static ArrayList<Particle>particles = new ArrayList<Particle>();
@@ -142,10 +144,12 @@ public class GamePanel extends JPanel implements Runnable, KeyListener{
     playerFrameCounter += player.draw(g, playerFrame);
     b.draw(g);
     for(int i=0; i<particles.size(); i++){
-      particles.get(i).draw(g);
-      particles.get(i).lifeSpan--;
-      if(particles.get(i).lifeSpan<=0){
-        particles.remove(i);
+      if(i<particles.size()) {
+        particles.get(i).draw(g);
+        particles.get(i).lifeSpan--;
+        if (particles.get(i).lifeSpan <= 0) {
+          particles.remove(i);
+        }
       }
     }
   g.drawString(camera.x+" "+((camera.x+GAME_WIDTH)/Tile.length),100,100);
@@ -154,14 +158,14 @@ public class GamePanel extends JPanel implements Runnable, KeyListener{
 
   //call the move methods in other classes to update positions
   //this method is constantly called from run(). By doing this, movements appear fluid and natural. If we take this out the movements appear sluggish and laggy
-  public void move(){
+  public void move() throws IOException {
     player.move();
     for (NonPlayer n: enemy) {
       n.move();
     }
     b.move();
-    for (Particle p: particles) {
-      p.move();
+    for(int i=0; i<particles.size(); i++){
+      particles.get(i).move();
     }
   }
 
@@ -225,8 +229,17 @@ public class GamePanel extends JPanel implements Runnable, KeyListener{
 
       //only move objects around and update screen if enough time has passed
       if(delta >= 1){
-        move();
+        try {
+          move();
+        } catch (IOException e) {
+          throw new RuntimeException(e);
+        }
         checkCollision();
+        try {
+          updateParticle();
+        } catch (IOException e) {
+          throw new RuntimeException(e);
+        }
         repaint();
         if (playerFrameCounter > 5) {
           // increment sprite image to be used and keeps it below 12
@@ -238,6 +251,12 @@ public class GamePanel extends JPanel implements Runnable, KeyListener{
     }
   }
 
+  public void updateParticle() throws IOException {
+    for(Tile t: particleTiles){
+      particles.add(new Particle(t.realX+Tile.length/2,t.y+Tile.length/2 ,GlobalState.randInt(-3,3),GlobalState.randInt(-3,3),GlobalState.randInt(1,5),"img/particles/LavaParticle.png"));
+    }
+  }
+
   //if a key is pressed, we'll send it over to the Player class for processing
   public void keyPressed(KeyEvent e){
     player.keyPressed(e);

src/GenericSprite.java

@@ -6,6 +6,7 @@ In 2D GUI, basically everything is a rectangle even if it doesn't look like it!
 */ 
 import java.awt.*;
 import java.awt.event.*;
+import java.io.IOException;
 
 public class GenericSprite extends Rectangle{
 
@@ -22,6 +23,8 @@ public class GenericSprite extends Rectangle{
   public boolean upPressed= false;
   public boolean downPressed = false;
   public boolean isGrounded = false;
+
+  public boolean isPlayer = false;
   //constructor creates ball at given location with given dimensions
   // TODO: reverse order of height and width
   public GenericSprite(int x, int y, int height, int width){
@@ -51,7 +54,7 @@ public class GenericSprite extends Rectangle{
   }
 
 
-  public void move(){
+  public void move() throws IOException {
 
   }
 
@@ -88,7 +91,7 @@ public class GenericSprite extends Rectangle{
       for (int j = lowY; j < highY; j++) {
         if (GamePanel.map[i][j] != null) {
           if (collide(GamePanel.map[i][j], this.x + x, this.y + y)) {
-            if (GamePanel.map[i][j].isFinish) {
+            if (GamePanel.map[i][j].isFinish&&isPlayer) {
               LevelManager.nextLevel();
               return true;
             }

src/GlobalState.java

@@ -1,3 +1,6 @@
 public class GlobalState {
     public static final int second = 10;
+    public static int randInt(int low, int high){
+        return (int)(Math.random()*(high-low+1))+low;
+    }
 }

src/MapReader.java

@@ -28,6 +28,7 @@ public class MapReader {
         x = 0;
         y = 0;
       GamePanel.enemy.clear();
+      GamePanel.particleTiles.clear();
       for(int i=0; i<GamePanel.map.length; i++){
           Arrays.fill(GamePanel.map[i], null);
       }
@@ -90,6 +91,7 @@ public class MapReader {
           } else if(file.charAt(i)=='l'){
               newTile("img/tiles/terrain/lava.png");
               GamePanel.map[x][y].kills = true;
+              GamePanel.particleTiles.add(GamePanel.map[x][y]);
           }
           x+=1;
       }

src/Particle.java

@@ -1,4 +1,6 @@
 import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.io.IOException;
 
 public class Particle extends GenericSprite{
     public static final int small = 3;
@@ -9,17 +11,22 @@ public class Particle extends GenericSprite{
     public int yVelocity;
 
     public int lifeSpan = 10;
-    public Particle(int x, int y, int xVelocity, int yVelocity){
-        super(x,y,(int)(Math.random()*(big-small+1))+3, (int)(Math.random()*(big-small+1))+3);
+
+    public BufferedImage sprite;
+
+    public Particle(int x, int y, int xVelocity, int yVelocity, int length, String filePath) throws IOException {
+        super(x,y,length, length);
         this.xVelocity = xVelocity;
         this.yVelocity = yVelocity;
+        sprite = GamePanel.getImage(filePath);
     }
     public void move(){
     x+=xVelocity;
     y+=yVelocity;
+    yVelocity+=0.5;
     }
     public void draw(Graphics g){
-    g.drawRect(x-GamePanel.camera.x,y,WIDTH,HEIGHT);
+        g.drawImage(sprite,x-GamePanel.camera.x,y,WIDTH,HEIGHT, null);
     }
 
 }

src/Player.java

@@ -34,6 +34,7 @@ public class Player extends GenericSprite {
     this.rightKey = rightKey;
     spriteArray = sprites;
     alive = true;
+    isPlayer = true;
   }
 
 
@@ -113,7 +114,7 @@ public class Player extends GenericSprite {
     }
     return canUpdate;
   }
-  public void move(){
+  public void move() throws IOException {
 
     if(canUpdate(xVelocity, 0)&&canUpdate(0, yVelocity)&&!canUpdate(xVelocity, yVelocity)){
       GamePanel.camera.x += -Math.signum(xVelocity);
@@ -159,13 +160,16 @@ public class Player extends GenericSprite {
 
     if(rightPressed){
       if(isGrounded){
-        GamePanel.particles.add(new Particle(x+GamePanel.camera.x+WIDTH/2,(int)(y+HEIGHT*0.8),3,3));
+       addParticle(-1);
       }
       if(xVelocity<5) {
         xVelocity += 1;
       }
     }
     if(leftPressed) {
+      if(isGrounded){
+        addParticle(1);
+      }
       if(xVelocity>-5) {
         xVelocity -= 1;
       }
@@ -197,6 +201,13 @@ public class Player extends GenericSprite {
     GamePanel.camera.x = LevelManager.xSpawn;
     y = LevelManager.ySpawn;
   }
+
+  public void addParticle(int x) throws IOException {
+    if(GlobalState.randInt(1,3)==3) {
+      GamePanel.particles.add(new Particle(this.x + GamePanel.camera.x + WIDTH / 2 + GlobalState.randInt(-PLAYER_WIDTH / 2, PLAYER_WIDTH / 2)
+              , (int) (y + HEIGHT * 0.95), GlobalState.randInt(-2, 2) + x, GlobalState.randInt(-4, 1), GlobalState.randInt(1, 7), "img/particles/GrassParticle.png"));
+    }
+    }
   public int draw(Graphics g, int frame) {
     frame %= spriteArray[0][0].length;
     if (!upPressed && !downPressed && !leftPressed && !rightPressed) {