public override void Draw(CanvasDrawingSession canvas)
{
if (LastFired < FIRE_COOLDOWN)
{
LastFired++;
}
Vector2 triangleTip = VMath.AddVectors(Position, VMath.ScalarMultiply(UnitDirectionVector, 12));
Vector2 triangleLeft = VMath.AddVectors(
VMath.AddVectors(Position, VMath.ScalarMultiply(UnitDirectionVector, -12))
, VMath.ScalarMultiply(VMath.GetPerpendicularVector(UnitDirectionVector), -8));
Vector2 triangleRight = VMath.AddVectors(
VMath.AddVectors(Position, VMath.ScalarMultiply(UnitDirectionVector, -12))
, VMath.ScalarMultiply(VMath.GetPerpendicularVector(UnitDirectionVector), 8));
Vector2[] trianglePoints = { triangleTip, triangleLeft, triangleRight };
CanvasGeometry triangle = CanvasGeometry.CreatePolygon(canvas, trianglePoints);
canvas.FillGeometry(triangle, Colors.CadetBlue);
}
public void Move(int canvasWidth, int canvasHeight)
{
Position = VMath.AddVectors(Position, VMath.ScalarMultiply(UnitDirectionVector, Speed));
if (!(this is Bullet))
{
if (Position.X > canvasWidth)
{
Position = new Vector2(0, Position.Y);
}
if (Position.X < 0)
{
Position = new Vector2(canvasWidth, Position.Y);
}
if (Position.Y > canvasHeight)
{
Position = new Vector2(Position.X, 0);
}
if (Position.Y < 0)
{
Position = new Vector2(Position.X, canvasHeight);
}
}
}
public Vector2 GetGunPosition()
{
return(VMath.AddVectors(Position, VMath.ScalarMultiply(UnitDirectionVector, 12)));
}
public void Update()
{
if (IsUpButtonPressed)
{
if (player.Speed < 0)
{
player.Speed = 0;
}
if (player.Speed < player.MAX_SPEED)
{
player.Speed++;
}
}
else
{
if (player.Speed > 0)
{
player.Speed--;
}
}
if (IsDownButtonPressed)
{
if (player.Speed > 0)
{
player.Speed = 0;
}
if (player.Speed > -player.MAX_SPEED)
{
player.Speed--;
}
}
else
{
if (player.Speed < 0)
{
player.Speed++;
}
}
if (IsLeftButtonPressed)
{
player.Rotate(player.ROTATE_DEGREE_INCREMENT);
}
if (IsRightButtonPressed)
{
player.Rotate(-player.ROTATE_DEGREE_INCREMENT);
}
if (IsSpaceBarPressed)
{
App.soundPlayer.Play();
if (player.LastFired == player.FIRE_COOLDOWN && !player.IsDead())
{
player.LastFired = 0;
Bullet newBullet = new Bullet(VMath.AddVectors(player.Position, new Vector2(rand.Next(8) - 4, rand.Next(8) - 4)), player.UnitDirectionVector, 20, 3);
gameObjects.Add(newBullet);
}
}
if (rand.Next(1, 100) <= 1) //random asteroid spawn chance
{
Asteroid newAsteroid = new Asteroid(new Vector2(rand.Next(0, canvasWidth), 0), new Vector2(rand.Next(-180, 180), rand.Next(-180, 180)), rand.Next(1, 5), rand.Next(15, 100));
gameObjects.Add(newAsteroid);
}
foreach (var obj in gameObjects.Where((h => (h is HealthBar))).ToList())
{
gameObjects.Remove(obj);
}
HealthBar gameHealthBar = new HealthBar(new Vector2(canvasWidth, canvasHeight), new Vector2(0, 0), 0, player.Health);
gameObjects.Add(gameHealthBar);
foreach (var obj in gameObjects.ToList())
{
obj.Move(canvasWidth, canvasHeight);
if (obj.IsDead())
{
gameObjects.Remove(obj);
}
}
foreach (var obj in gameObjects.Where((b => (b is Bullet))).ToList())
{
if (obj.Position.X < 0 || obj.Position.X > canvasWidth || obj.Position.Y < 0 || obj.Position.Y > canvasHeight)
{
obj.Destroy();
}
}
foreach (var obj in gameObjects.Where((a => (a is Asteroid))).ToList())
{
if ((obj.Position.X + obj.Radius > player.Position.X && obj.Position.X - obj.Radius < player.Position.X) && (obj.Position.Y + obj.Radius > player.Position.Y && obj.Position.Y - obj.Radius < player.Position.Y))
{
if (!player.IsDead())
{
player.AsteroidCollision(obj);
obj.Destroy();
}
}
}
foreach (var ast in gameObjects.Where((a => (a is Asteroid))).ToList())
{
foreach (var bul in gameObjects.Where((b => (b is Bullet))).ToList())
{
if ((ast.Position.X + ast.Radius > bul.Position.X && ast.Position.X - ast.Radius < bul.Position.X) && (ast.Position.Y + ast.Radius > bul.Position.Y && ast.Position.Y - ast.Radius < bul.Position.Y))
{
gameObjects.Add((ast as Asteroid).Half());
bul.Destroy();
}
}
}
if (player.Health <= 0)
{
gameOver = true;
}
}