Initial Commit

4 files changed, 241 insertions, 0 deletions

diff --git a/TankBattleCore/Objects/Bullet.cs b/TankBattleCore/Objects/Bullet.cs
new file mode 100644
index 0000000..0775d22
--- /dev/null
+++ b/TankBattleCore/Objects/Bullet.cs
@@ -0,0 +1,47 @@
+using System;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+
+namespace TankBattleCore.Objects;
+
+struct BulletData
+{
+    public Vector2 Position;
+    public float Angle;
+    public float Speed;
+}
+
+class Bullet
+{
+    public const float SlowSpeed = 250f;
+    public const float FastSpeed = 400f;
+
+    private Vector2 _position;
+    private Texture2D _bulletTexture;
+    float _speed;
+    float _angle;
+
+    public Vector2 Position { get => _position; }
+
+    public Bullet(Vector2 position, Texture2D bulletTexture, float speed, float angle)
+    {
+        _position = position;
+        _bulletTexture = bulletTexture;
+        _speed = speed;
+        _angle = angle;
+    }
+
+    public void Update(float dt)
+    {
+        _position += new Vector2(MathF.Cos(_angle), MathF.Sin(_angle)) * _speed * dt;
+    }
+
+    public void Draw(SpriteBatch spriteBatch)
+    {
+        spriteBatch.Draw(
+            _bulletTexture,
+            _position,
+            Color.White
+        );
+    }
+}
\ No newline at end of file
diff --git a/TankBattleCore/Objects/Game.cs b/TankBattleCore/Objects/Game.cs
new file mode 100644
index 0000000..75f25e5
--- /dev/null
+++ b/TankBattleCore/Objects/Game.cs
@@ -0,0 +1,106 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using Microsoft.Xna.Framework.Input;
+using TankBattleCore;
+using TankBattleCore.Objects;
+
+internal class GameScene : IScene
+{
+    private const int PlayAreaOffset = 100;
+    private static readonly Rectangle PlayArea = new Rectangle(
+        -PlayAreaOffset,
+        -PlayAreaOffset,
+        Game1.Instance.WindowWidth + PlayAreaOffset,
+        Game1.Instance.WindowHeight + PlayAreaOffset
+    );
+
+    private List<Tank> tanks = [];
+    private List<Bullet> bullets = [];
+    private bool paused = false;
+
+    public GameScene()
+    {
+        Clear();
+
+        AddTank(
+            new Tank(
+                Vector2.Zero,
+                Game1.Instance.TankBodyTextures[TankColor.Black]
+            )
+        );
+    }
+
+    internal void Clear()
+    {
+        tanks.Clear();
+    }
+
+    public void Update(float dt)
+    {
+        if (paused)
+        {
+            return;
+        }
+
+        var keyboardState = Keyboard.GetState();
+
+        foreach (Tank t in tanks)
+        {
+            t.Update(dt);
+
+            if (keyboardState.IsKeyDown(Keys.Enter))
+            {
+                ShootBullet(t.GetNextShot());
+            }
+        }
+
+        foreach (Bullet b in bullets)
+        {
+            b.Update(dt);
+        }
+
+        bullets.RemoveAll(b => !PlayArea.Contains(b.Position));
+    }
+
+    public void Draw(SpriteBatch spriteBatch)
+    {
+        spriteBatch.Begin();
+
+        foreach (Tank t in tanks)
+        {
+            t.Draw(spriteBatch);
+        }
+
+        foreach (Bullet b in bullets)
+        {
+            b.Draw(spriteBatch);
+        }
+
+        spriteBatch.End();
+    }
+
+    private void AddTank(Tank tank)
+    {
+        tanks.Add(tank);
+    }
+
+    private void AddBullet(Bullet bullet)
+    {
+        bullets.Add(bullet);
+    }
+
+    public void ShootBullet(BulletData bulletData)
+    {
+        AddBullet(
+            new Bullet(
+                bulletData.Position,
+                Game1.Instance.TankBodyTextures[TankColor.Black],
+                bulletData.Speed,
+                bulletData.Angle
+            )
+        );
+    }
+}
\ No newline at end of file
diff --git a/TankBattleCore/Objects/Scene.cs b/TankBattleCore/Objects/Scene.cs
new file mode 100644
index 0000000..9fa5619
--- /dev/null
+++ b/TankBattleCore/Objects/Scene.cs
@@ -0,0 +1,9 @@
+using Microsoft.Xna.Framework.Graphics;
+
+namespace TankBattleCore.Objects;
+
+internal interface IScene
+{
+    internal void Update(float dt);
+    internal void Draw(SpriteBatch spriteBatch);
+}
\ No newline at end of file
diff --git a/TankBattleCore/Objects/Tank.cs b/TankBattleCore/Objects/Tank.cs
new file mode 100644
index 0000000..927d053
--- /dev/null
+++ b/TankBattleCore/Objects/Tank.cs
@@ -0,0 +1,79 @@
+using System;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using Microsoft.Xna.Framework.Input;
+
+namespace TankBattleCore.Objects;
+
+internal class Tank
+{
+    private const float Speed = 200;
+    private const float TurnSpeed = 2; //In Rad/Sec
+    private const float Scale = 0.6f;
+    private const int PoweredUpShotInterval = 4;
+
+    private Vector2 _position;
+    private float _angle = 0;
+    private Texture2D _bodyTexture;
+    private int _numShots = 0;
+    private float ShotSpeed
+    {
+        get
+        {
+            if (_numShots % PoweredUpShotInterval == PoweredUpShotInterval - 1)
+            {
+                return Bullet.FastSpeed;
+            } else
+            {
+                return Bullet.SlowSpeed;
+            }
+        }
+    }
+
+    public Tank(Vector2 postion, Texture2D bodyTexture)
+    {
+        _position = postion;
+        _bodyTexture = bodyTexture;
+    }
+
+    public void Update(float dt)
+    {
+        _position += new Vector2(MathF.Cos(_angle), MathF.Sin(_angle)) * Speed * dt;
+
+        var keyboardState = Keyboard.GetState();
+        if (keyboardState.IsKeyDown(Keys.A))
+        {
+            _angle -= TurnSpeed * dt;
+        } else if (keyboardState.IsKeyDown(Keys.D)) {
+            _angle += TurnSpeed * dt;
+        }
+    }
+
+    public void Draw(SpriteBatch _spriteBatch)
+    {
+        _spriteBatch.Draw(
+            _bodyTexture,
+            _position,
+            null,
+            Color.White,
+            _angle - MathF.PI / 2,  //Texture is rotated 90 degrees downwards
+            0.5f * new Vector2(_bodyTexture.Width, _bodyTexture.Height),
+            Scale,
+            SpriteEffects.None,
+            1.0f
+        );
+    }
+
+    public BulletData GetNextShot()
+    {
+        var shotSpeed = ShotSpeed;
+        _numShots++;
+
+        return new BulletData
+        {
+            Position = _position,
+            Angle = _angle,
+            Speed = shotSpeed
+        };
+    }
+}
\ No newline at end of file