Пример #1
0
 public void AddExplosion(Vector2 explosionPos, int numberOfParticles, float size, float maxAge, GameTime gameTime)
 {
     for (var i = 0; i < numberOfParticles; i++)
     {
         var particle = new ParticleData(explosionPos, size, maxAge, i, gameTime);
         ParticleList.Add(particle);
     }
 }
Пример #2
0
        private Boolean UpdateParticle(GameTime gameTime, ParticleData particle)
        {
            var now       = (float)gameTime.TotalGameTime.TotalMilliseconds;
            var timeAlive = now - particle.BirthTime;

            if (timeAlive > particle.MaxAge)
            {
                return(false);
            }

            var relAge = timeAlive / particle.MaxAge;

            particle.Position = 0.5f * particle.Accelaration * relAge * relAge + particle.Direction * relAge + particle.OrginalPosition;

            var invAge = 1.0f - relAge;

            particle.ModColor = new Color(new Vector4(invAge, invAge, invAge, invAge));

            var positionFromCenter = particle.Position - particle.OrginalPosition;
            var distance           = positionFromCenter.Length();

            particle.Scaling = (50.0f + distance) / 200.0f;
            return(true);
        }