public GameEngine()
{
#region GameWindow properties and init
GameWindow.FormBorderStyle = FormBorderStyle.Fixed3D;
GameWindow.ClientSize = new Size(Width, Height);
GameWindow.Text = Title;
GameWindow.MaximizeBox = false;
GameWindow.StartPosition = FormStartPosition.CenterScreen;
GameWindow.KeyPreview = false;
//Add the GameScreen to the GameWindow
GameWindow.Controls.Add(GameScreen);
//Pull out the Draw event in the gamescreen
GameScreen.Paint += GameDraw;
//Pull out the FormClosed event so we can terminate the game thread
GameWindow.FormClosed += GameWindow_FormClosed;
#endregion
//Other game objects
GameTimer = new HiResTimer();
GameInput = new Input(GameWindow, GameScreen);
//Create the game
game = new Game(this);
//Start the game thread
StartGameThread();
//Start the form application
Application.Run(GameWindow);
}
public void Update(TimeSpan gameTime, Input input)
{
//Logic to toggle debug mode if F3 is pressed
if (input.IsKeyDown(Keys.F3) && isF3Released == true)
{
Game.DebugView = !Game.DebugView;
isF3Released = false;
}
isF3Released = input.IsKeyUp(Keys.F3);
CurrentGameState.Update(gameTime, input);
}
public override void Update(TimeSpan gameTime, Input input)
{
if (input.Left)
{
Game.CurrentState = State.game;
}
//update the background asteroids
foreach (Asteroid asteroid in BackgroundAsteroids)
asteroid.Update(gameTime, input);
base.Update(gameTime, input);
}
public override void Update(TimeSpan GameTime, Input input)
{
if (Alive)
{
//stops the bullet from updating and being drawn after so long(kills the bullet)
if (GameTime.TotalMilliseconds > (startTime + BulletLifeSpan))
{
Alive = false;
}
base.Update(GameTime, input);
}
}
public override void Update(TimeSpan GameTime, Input input)
{
if (Alive)
{
base.Update(GameTime, input);
}
}
public void Update(TimeSpan GameTime, Input input, List<Entity> entityList)
{
#region Player Death
if (!Alive)
{
if (canRespawn == false)
{
//Player fadeout animation
DeathDeltaTime = GameTime.TotalMilliseconds - DeathStartTimer;
//stops the DeathDeltaTimer from going over 1800, to stop errors with percentage
if (DeathDeltaTime > 1800) { DeathDeltaTime = 1800; }
//Calculate a percentage oh time till the death animation stops so that we can color the line accordingly
double percentage = (1800 - DeathDeltaTime) / 1800;
//Sets the color of the player depending on the delta time
Model.ModelColor = Color.FromArgb(255, (int)(percentage * 255), (int)(percentage * 255), (int)(percentage * 255));
if (DeathDeltaTime >= 1800)
{
canRespawn = true;
}
//Stops the flame from being drawn when the player is dead;
DrawFlame = false;
}
}
#endregion
#region Player Movement
//Moving and rotating the player depending of different input
if (Alive)
{
if (input.IsKeyDown(Keys.Right))
{
AddToAngle(PlayerTurnSpeed);
}
if (input.IsKeyDown(Keys.Left))
{
AddToAngle(-PlayerTurnSpeed);
}
if (input.IsKeyDown(Keys.Up))
{
Velocity = Direction * PlayerSpeed;
}
//Displaying the flickering flame if the player is moving and
if (input.IsKeyDown(Keys.Up))
{
if (GameTime.TotalMilliseconds > (FlameStartTimer + PlayerFlameInterval))
{
FlameStartTimer = GameTime.TotalMilliseconds;
DrawFlame = !DrawFlame;
}
}
if (input.IsKeyUp(Keys.Up))
{
DrawFlame = false;
FlameStartTimer = 0;
}
}
#endregion
#region Player Shooting
if (input.IsKeyDown(Keys.Space) && Alive)
{
if (GameTime.TotalMilliseconds > (BulletStartTimer + PlayerBulletInterval))
{
//Fire a new bullet and reset the start time
//add a rotated vector of -25 in the Y direction to have the bullet shoot from the nose of the ship
Bullet bullet = new Bullet(Game, Position + new Vector2(0, -25).Rotate(Angle), Direction, GameTime.TotalMilliseconds);
bulletList.Add(bullet);
//reset the bullet timer to stop the ship from firing a constant stream of bullets
BulletStartTimer = GameTime.TotalMilliseconds;
}
}
//Update every bullet in the list
foreach (Bullet bullet in bulletList)
{
bullet.Update(GameTime, input);
}
#endregion
#region Asteroids and Bullet Collision
foreach (Bullet bullet in bulletList)
{
if (bullet.Alive)
{
foreach (Entity entity in entityList.ToList())
{
if (entity is Asteroid)
{
Asteroid asteroid = (Asteroid)entity;
if (asteroid.Alive)
{
if (Hitbox.Collision(bullet.BulletHitbox, asteroid.AsteroidHitbox))
{
asteroid.BulletHitPosition = bullet.Position;
asteroid.Kill();
bullet.Kill();
if (AsteroidKill != null) { AsteroidKill(asteroid.Size); }
}
}
}
}
}
}
#endregion
#region Player and Asteroid Collision
if (Alive && !IsImmortal)
{
foreach (Entity entity in entityList.ToList())
{
if (entity is Asteroid)
{
Asteroid asteroid = (Asteroid)entity;
if (asteroid.Alive)
{
if (Hitbox.Collision(asteroid.AsteroidHitbox, PlayerHitbox))
{
//kill the asteroid that collided with the player (causing it to split)
asteroid.Kill();
//call the on plater death event
if (Death != null) { Death(); }
//call the asteroid killed event
if (AsteroidKill != null) { AsteroidKill(asteroid.Size); }
//Set alive to false and set the death animation start timer
Alive = false;
DeathStartTimer = GameTime.TotalMilliseconds;
}
}
}
}
}
#endregion
#region Immortality
if (IsImmortal)
{
double TimePassed = GameTime.TotalMilliseconds - ImmortalityStartTime;
if (TimePassed > ImmortalityTime) //stop the immortality
{
Hide = false;
IsImmortal = false;
}
else
{
int ModResult = ((int)TimePassed) / ImmortalityFlashInterval;
Hide = MathUtil.IsEven(ModResult);
}
}
#endregion
//Move the player by its velocity
base.Update(GameTime, input);
//Lower the velocity to add the effect of friction to the player
//If the keys are still being pressed, then this will be discounted
//because the velocity is reset
Velocity = Velocity - (Velocity * PlayerFrictionFactor);
}
public virtual void Update(TimeSpan GameTime, Input input)
{
//Increase the position by the velocity
Position += Velocity;
//Keep the entity within the 800, 600 viewport by looping it around the edges
if (loop)
{
if (position.X < -model.BoundingBoxSize.Width/2) { position += new Vector2(800, 0); }
if (position.X > 800 + model.BoundingBoxSize.Width/2) { position -= new Vector2(800, 0); }
if (position.Y < -model.BoundingBoxSize.Height/2) { position += new Vector2(0, 600); }
if (position.Y > 600 + model.BoundingBoxSize.Height/2) { position -= new Vector2(0, 600); }
}
}
public virtual void Update(TimeSpan gameTime, Input input)
{
MousePosition = new Vector2(input.MousePosition);
}