protected virtual Particle GenerateNewParticle()
{
var p = new Particle(0, Entity.Body.Position / 2, 30, this) { Physics = { Velocity = Vector2.UnitY } };
return p;
}
protected override Particle GenerateNewParticle()
{
int index = _rand.Next(0, 3);
int ttl = _rand.Next(10, 16);
//Rotate the point based on the center of the sprite
// p = unrotated point, o = rotation origin
//p'x = cos(theta) * (px-ox) - sin(theta) * (py-oy) + ox
//p'y = sin(theta) * (px-ox) + cos(theta) * (py-oy) + oy
var origin = Entity.Body.Position;
var unrotatedposition = new Vector2(
Entity.Body.BoundingBox.X,
Entity.Body.BoundingBox.Bottom - 10);
var angle = Entity.Body.Angle;
var position = new Vector2(
(float)(Math.Cos(angle) * (unrotatedposition.X - origin.X) - Math.Sin(angle) * (unrotatedposition.Y - origin.Y) + origin.X),
(float)(Math.Sin(angle) * (unrotatedposition.X - origin.X) + Math.Cos(angle) * (unrotatedposition.Y - origin.Y) + origin.Y)
);
var p = new Particle(index, position, ttl, this);
var anglev = (float)_rand.NextDouble() - .5f;
p.Physics.Thrust((float)_rand.NextDouble(), angle - anglev);
return p;
}
