first commit

Bullet.java

@@ -0,0 +1,122 @@
+import javax.swing.*;
+import java.awt.*; 
+import java.awt.Graphics;
+import java.awt.Canvas;
+
+public class Bullet implements Drawable, Collisionable
+{
+    private int x, y, width = 1, height = 1, muzzleAngle, startX, startY;
+    private double speedX, speedY, startSpeedX, startSpeedY, v0;
+    private JFrame frame;
+    private boolean dead = false;
+    private long start;
+    
+    public Bullet(
+        int muzzleAngle,
+        int x,
+        int y,
+        double parentSpeedX,
+        double parentSpeedY
+    )
+    {
+        this.start = System.currentTimeMillis();
+        
+        this.startX = x;
+        this.startY = y;
+        
+        this.x = x;
+        this.y = y;
+        this.frame = frame;
+        
+        int startSpeed = 10;
+        
+        this.muzzleAngle = muzzleAngle;
+        
+        this.speedX = 
+            SinCosLookup.getCos(muzzleAngle) * startSpeed +
+            SinCosLookup.getCos(muzzleAngle) * parentSpeedX
+        ;
+        this.startSpeedX = this.speedX;
+        
+        this.speedY =
+            SinCosLookup.getSin(muzzleAngle) * startSpeed +
+            SinCosLookup.getSin(muzzleAngle) * parentSpeedY
+        ;
+        this.startSpeedY = this.speedY;
+        
+        this.v0 = Math.sqrt(Math.pow(this.startSpeedX, 2) + Math.pow(this.startSpeedY, 2));
+    }
+    
+    public void step()
+    {
+        double t = (System.currentTimeMillis() - this.start);
+        this.x = (int)(this.v0 * t * SinCosLookup.getCos(this.muzzleAngle)) + this.startX;
+        
+        double g = -0.001;
+        this.y = (int)(this.startY + this.v0 * t * SinCosLookup.getSin(this.muzzleAngle) - (g / 2) * Math.pow(t, 2));
+        System.out.println("y = " + this.y + "\tx = " + this.x + "\tt = " + t);
+        
+        //        this.x += (int)this.speedX;      
+        //        this.speedY += 0.4;         
+        //        this.y += (int)this.speedY;
+        
+    }
+    
+    // Drawable methods
+    
+    public void draw(Graphics g)
+    {        
+        g.drawRect(
+            this.x,
+            this.y,
+            1,
+            1
+        );
+    }
+    
+    public boolean isDead(Box box)
+    {
+        if(this.y > box.getHeight())
+        {
+            return true;
+        }
+        
+        return this.dead;
+    }
+    
+    // Collisionable methods
+    
+    public int getX()
+    {
+        return this.x;
+    }
+    
+    public int getY()
+    {
+        return this.y;
+    }
+    
+    public int getWidth()
+    {
+        return this.width;
+    }
+    
+    public int getHeight()
+    {
+        return this.height;
+    }
+    
+    public int collisionCheckSum()
+    {
+        return 6;
+    }
+    
+    public void collisionedWith(int checkSum)
+    {
+        if((checkSum&0xFF & collisionCheckSum()&0xFF) == 0)
+        {            
+            this.dead = true;
+        }
+
+    }
+}