public LaserParticle(Vector2 position, Vector2 velocity)
{
this.position = position;
velocity.Normalize();
this.velocity = velocity * SPEED;
next = null;
prev = null;
}
private void DrawLaserForParticlePair(LaserParticle a, LaserParticle b, SpriteBatch batch)
{
Vector2 direction = a.Position - b.Position;
float radians = (float)Math.Atan2(direction.Y, direction.X);
float length = Vector2.Distance(b.Position, a.Position);
Rectangle dest = new Rectangle((int)b.Position.X, (int)b.Position.Y - 1, (int)length, 2);
/* texture is a 'CIRCLE', so pull a chunk out of it! */
Rectangle source = new Rectangle(5, 5, 1, 1);
batch.Draw(laser, dest, source, color, radians, new Vector2(0, 1), SpriteEffects.None, 1f);
}
private void construct(Vector2 position, Vector2 velocity, Color color)
{
head = new LaserParticle(position, velocity);
tail = new LaserParticle(position, velocity);
head.Next = tail;
tail.Prev = head;
this.color = color;
}
public void AppendParticle(LaserParticle addition)
{
LaserParticle penultimate = tail;
// penultimate.Prev already is correct
penultimate.Next = addition;
addition.Prev = penultimate;
addition.Next = null;
tail = addition;
}
private void LaserUpdate(GameTime gameTime)
{
if (m_generating != null)
{
Vector2 velocity = Vector2.Transform(Vector2.UnitX, Matrix.CreateRotationZ(this.orientation));
LaserParticle newParticle = new LaserParticle(laserStart, velocity);
m_generating.AppendParticle(newParticle);
}
}