// These are "factory" methods, they are used when you want to use parameters of the same type and amount
// for class constructors
// They are used by calling ClassName.FromMethod(PARAMETERS)
// for example: Velocity myVelocity = Velocity.FromCoordinates(2, -2); which creates a velocity going towards 2, -2
// or Velocity myVelocity = Velocity.FromDirection(270, 30); which creates a velocity going straight down at a speed of 30
public static Velocity FromDirection(float directionDegrees, float speed)
{
Velocity v = new Velocity();
v.direction = new Vector2((float)Math.Cos(directionDegrees * DEG_TO_RAD) * speed, (float)Math.Sin(directionDegrees * DEG_TO_RAD) * speed);
v.speed = speed;
return v;
}
public static Velocity FromCoordinates(float x, float y)
{
Velocity v = new Velocity();
v.direction = new Vector2(x, y);
v.speed = v.direction.Length();
return v;
}
// Load sprite from existing texture
public BasicSprite(Texture2D tex, bool collide)
{
spriteTex = tex;
spritePos = new Vector2(0, 0);
spriteSize = spriteTex.Bounds.Size;
velocity = Velocity.Zero;
collidable = collide;
if (!collidable)
borderColor = Color.Blue;
}
// Load sprite from file, requires you pass in a game instance for content loading
// when subclassing BasicSprite you must create the same Constructors in the subclass with :base(parameters)
// the parameters should match the ones here
public BasicSprite(Game game, string file, bool collide)
{
try {
spriteTex = game.Content.Load<Texture2D>(file); // load the texture
spritePos = new Vector2(0, 0); // initial position
spriteSize = spriteTex.Bounds.Size; // get the size from the texture size
velocity = Velocity.Zero;
collidable = collide;
if (!collidable)
borderColor = Color.Blue;
} catch (ContentLoadException)
{
Console.WriteLine(file + " not loaded. Probably can't be found.\n");
}
}
public void updatePositionFromVelocity(Velocity v)
{
spritePos = getUpdatePositionFromVelocity(v);
}
public Vector2 getUpdatePositionFromVelocity(Velocity v)
{
return spritePos + v.getDirection();
}
