public Particle(MirLibrary lib, int textureIndex, float opacity, Vector2 position, Vector2 velocity,
float angle, float angularVelocity, Color color, float scale, float scaleRate, TimeSpan ttl, bool fade, float fadeRate, float maxScale = -1f)
{
Library = lib;
TextureIndex = textureIndex;
Position = position;
Velocity = velocity;
Angle = angle;
AngularVelocity = angularVelocity;
Color = color;
Scale = scale;
ScaleRate = scaleRate;
MaxScale = maxScale;
TTL = ttl;
UpdateSpeed = TimeSpan.FromMilliseconds(10);
Opacity = opacity;
Fade = fade;
FadeRate = fadeRate;
Expires = CEnvir.Now.Add(TTL);
NextUpdate = CEnvir.Now.Add(UpdateSpeed);
}
