public static Component[] create(Powerup_Impl impl)
{
Position pos;
Velocity vel;
Angle ang;
var powerup = new Component[] {
new Bounding_Circle {
radius = 16.0f, ignore_collisions = Bullet_Factory.IG_BULLET
},
pos = new Position {
x = -1800.0f, y = 1600.0f
},
new Sprite {
texture = Fab5_Game.inst().get_content <Texture2D>("powerup")
},
new Powerup {
impl = impl
},
vel = new Velocity {
x = 0.0f, y = 0.0f
},
ang = new Angle {
ang_vel = 3.14f * 0.7f, drag = 0.0f
},
new Light_Source {
color = new Color(0.0f, 1.0f, 0.31f), intensity = 0.5f
},
new TTL {
max_time = 60.0f
}, // auto-respawn lingering powerups
new Particle_Emitter {
emit_fn = () => {
if ((float)rand.NextDouble() > 0.8f)
{
return(null);
}
var theta1 = (2.0f / 5.0f) * 3.1415f * (float)rand.Next(0, 6);
var theta2 = 2.0f * 3.1415f * (float)rand.NextDouble();
var radius = 10.0f * (float)rand.NextDouble();
var speed = 150.0f * (float)(0.5f + rand.NextDouble());
var color = Color.White;
return(new Component [] {
new Mass {
drag_coeff = 5.9f
},
new Position {
x = pos.x + (float)Math.Cos(theta1) * radius,
y = pos.y + (float)Math.Sin(theta1) * radius
},
new Velocity {
x = vel.x * 0.5f + (float)Math.Cos(theta2) * speed,
y = vel.y * 0.5f + (float)Math.Sin(theta2) * speed
},
new Sprite {
blend_mode = Sprite.BM_ADD,
color = color,
layer_depth = 0.3f,
scale = 0.4f + (float)rand.NextDouble() * 0.7f,
texture = Fab5_Game.inst().get_content <Texture2D>("particle2")
},
new TTL {
alpha_fn = (x, max) => (1.0f - ((x * x * x) / (max * max * max))),
max_time = 0.55f + (float)Math.Pow((rand.NextDouble() * 1.2f), 2.0f)
}
});
},
interval = 0.3f,
num_particles_per_emit = 2
},
};
return(powerup);
}