public Asteroid(Texture2D image, Vector2 position, AsteroidSize size)
: base(image, position)
{
this.size = size;
if (size == AsteroidSize.BIG)
{
asteroids[0] = new Asteroid(image, position, AsteroidSize.MEDIUM);
asteroids[1] = new Asteroid(image, position, AsteroidSize.MEDIUM);
}
else if (size == AsteroidSize.MEDIUM)
{
asteroids[0] = new Asteroid(image, position, AsteroidSize.SMALL);
asteroids[1] = new Asteroid(image, position, AsteroidSize.SMALL);
}
}
/// <summary>
/// Adds the asteroid.
/// </summary>
/// <param name="_object">The _object.</param>
public void AddAsteroid(Asteroid _object)
{
_object.AddObserver(this);
AddDrawableObject(_object);
}
/// <summary>
/// Calculates the new rotations.
/// </summary>
/// <param name="asteroid">The asteroid.</param>
/// <param name="bullet">The bullet.</param>
/// <returns></returns>
protected float[] CalculateNewRotations(Asteroid asteroid, Bullet bullet)
{
float[] returnedValues = new float[2] { 0, 0 };
float PI = 3.1415f;
float bulletRotation = bullet.Rotation % (2 * PI);
float asteroidRotation = asteroid.Rotation % (2 * PI);
if ((bulletRotation >= asteroidRotation - PI / 4) && (bulletRotation < asteroidRotation + PI / 4))
{
//Bullet comes from behind
returnedValues[0] = PI / 4;
returnedValues[1] = -PI / 4;
}
else if ((bulletRotation >= asteroidRotation - 5 * PI / 4) && (bulletRotation < asteroidRotation + 3 * PI / 4))
{
//Bullet comes from the front
returnedValues[0] = PI / 2;
returnedValues[1] = -PI / 2;
}
else if ((bulletRotation >= asteroidRotation + PI / 4) && (bulletRotation < asteroidRotation + 3 * PI / 4))
{
//Bullet comes from the right
returnedValues[0] = -PI / 4;
returnedValues[1] = 0;
}
else
{
//Bullet comes from the left
returnedValues[0] = PI / 4;
returnedValues[1] = 0;
}
return returnedValues;
}