internal void Draw(SpriteBatch spriteBatch, Camera camera, Texture2D texture)
{
Vector2 viewPosition = camera.GetVisualPositions(position);
Vector2 visualRadius = camera.GetVisualPositions(radius);
Rectangle rect = new Rectangle((int)viewPosition.X, (int)viewPosition.Y, (int)visualRadius.X, (int)visualRadius.Y);
float t = timeLivedSeconds/maxLifeTime;
if (t > 1.0)
{
t = 1.0f;
}
float endValue = 0.0f;
float startValue = 1.0f;
float visibility = endValue * t + (1.0f - t) * startValue;
Color color = new Color(visibility, visibility, visibility, visibility);
spriteBatch.Draw(texture, rect, color);
}
