Basic physics

.idea/misc.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_X" default="true" project-jdk-name="openjdk-18" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_18" default="true" project-jdk-name="openjdk-18" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>

src/GamePanel.java

@@ -9,21 +9,24 @@ Implements Runnable interface to use "threading" - let the game do two things at
 */
 import java.awt.*;
 import java.awt.event.*;
+import java.util.ArrayList;
 import javax.swing.*;
 
 public class GamePanel extends JPanel implements Runnable, KeyListener{
 
   //dimensions of window
-  public static final int GAME_WIDTH = 1920;
+  public static final int GAME_WIDTH = 1536;
-  public static final int GAME_HEIGHT = 1080;
+  public static final int GAME_HEIGHT = 768;
 
   public Thread gameThread;
   public Image image;
   public Graphics graphics;
   public PlayerBall ball;
 
+  public static ArrayList<Tile>map = new ArrayList<Tile>();
 
   public GamePanel(){
+    map.add(new Tile(1000, 700));
     ball = new PlayerBall(GAME_WIDTH/2, GAME_HEIGHT/2); //create a player controlled ball, set start location to middle of screen
     this.setFocusable(true); //make everything in this class appear on the screen
     this.addKeyListener(this); //start listening for keyboard input
@@ -54,6 +57,9 @@ public class GamePanel extends JPanel implements Runnable, KeyListener{
   //call the draw methods in each class to update positions as things move
   public void draw(Graphics g){
     ball.draw(g);
+    for(Tile i: map){
+      i.draw(g);
+    }
   }
 
   //call the move methods in other classes to update positions
@@ -64,14 +70,21 @@ public class GamePanel extends JPanel implements Runnable, KeyListener{
 
   //handles all collision detection and responds accordingly
   public void checkCollision(){
-    
+    ball.isGrounded = false;
+
+    for(Tile i: map){
+
+    }
     //force player to remain on screen
     if(ball.y<= 0){
       ball.y = 0;
     }
     if(ball.y >= GAME_HEIGHT - PlayerBall.BALL_DIAMETER){
       ball.y = GAME_HEIGHT-PlayerBall.BALL_DIAMETER;
+      ball.yVelocity = 0;
+      ball.isGrounded = true;
     }
+
     if(ball.x <= 0){
       ball.x = 0;
     }

src/PlayerBall.java

@@ -9,11 +9,17 @@ import java.awt.event.*;
 
 public class PlayerBall extends Rectangle{
 
-  public int yVelocity;
+  public double yVelocity;
-  public int xVelocity;
+  public double xVelocity;
-  public final int SPEED = 20; //movement speed of ball
+  public final double SPEED = 20; //movement speed of ball
+  public final double speedCap = 7; //Speed cap of ball
   public static final int BALL_DIAMETER = 20; //size of ball
 
+  public boolean rightPressed = false;
+  public boolean leftPressed = false;
+  public boolean upPressed= false;
+  public boolean downPressed = false;
+  public boolean isGrounded = false;
   //constructor creates ball at given location with given dimensions
   public PlayerBall(int x, int y){
     super(x, y, BALL_DIAMETER, BALL_DIAMETER);
@@ -24,22 +30,19 @@ public class PlayerBall extends Rectangle{
   //if the keyboard input isn't any of the options (d, a, w, s), then nothing happens
   public void keyPressed(KeyEvent e){
     if(e.getKeyChar() == 'd'){
-      setXDirection(SPEED);
+      rightPressed = true;
       move();
     }
-
     if(e.getKeyChar() == 'a'){
-      setXDirection(SPEED*-1);
+      leftPressed = true;
       move();
     }
-
     if(e.getKeyChar() == 'w'){
-      setYDirection(SPEED*-1);
+      upPressed = true;
       move();
     }
-
     if(e.getKeyChar() == 's'){
-      setYDirection(SPEED);
+      downPressed = true;
       move();
     }
   }
@@ -48,22 +51,19 @@ public class PlayerBall extends Rectangle{
   //Makes the ball stop moving in that direction
   public void keyReleased(KeyEvent e){
     if(e.getKeyChar() == 'd'){
-      setXDirection(0);
+      rightPressed = false;
       move();
     }
-
     if(e.getKeyChar() == 'a'){
-      setXDirection(0);
+      leftPressed = false;
       move();
     }
-
     if(e.getKeyChar() == 'w'){
-      setYDirection(0);
+      upPressed = false;
       move();
     }
-
     if(e.getKeyChar() == 's'){
-      setYDirection(0);
+      downPressed = false;
       move();
     }
   }
@@ -71,27 +71,37 @@ public class PlayerBall extends Rectangle{
   //called from GamePanel whenever a mouse click is detected
   //changes the current location of the ball to be wherever the mouse is located on the screen
   public void mousePressed(MouseEvent e){
-    x = e.getX();
+    //x = e.getX();
-		y = e.getY();
+	//	y = e.getY();
   }
 
-  //called whenever the movement of the ball changes in the y-direction (up/down)
-  public void setYDirection(int yDirection){
-    yVelocity = yDirection;
-  }
 
-  //called whenever the movement of the ball changes in the x-direction (left/right)
-  public void setXDirection(int xDirection){
-    xVelocity = xDirection;
-  }
-
-  //called frequently from both PlayerBall class and GamePanel class
-  //updates the current location of the ball
   public void move(){
-    y = y + yVelocity;
+    y = y + (int)yVelocity;
-    x = x + xVelocity;
+    x = x + (int)xVelocity;
+    if(rightPressed==true){
+      xVelocity+=1;
+    }
+    if(leftPressed==true){
+      xVelocity-=1;
+    }
+    if(upPressed&isGrounded){
+        yVelocity = -10;
+    }
+    xVelocity*=0.9;
+    yVelocity+=0.3;
+    capSpeed();
   }
 
+  public void capSpeed(){
+    if(xVelocity>speedCap){
+      xVelocity = speedCap;
+    } else if(xVelocity<-1*speedCap) {
+      xVelocity = -1*speedCap;
+    }
+  }
+
+
   //called frequently from the GamePanel class
   //draws the current location of the ball to the screen
   public void draw(Graphics g){

src/Tile.java

@@ -0,0 +1,16 @@
+import java.awt.*;
+
+public class Tile {
+    public int x;
+    public int y;
+    public static final int length = 30;
+    public Tile(int x, int y){
+        this.x = x;
+        this.y = y;
+    }
+
+    public void draw(Graphics g){
+        g.setColor(Color.black);
+        g.fillRect(x, y, length, length);
+    }
+}