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using Microsoft.Xna.Framework;
namespace MonoGame.Extended.Particles.Modifiers
{
public class LinearGravityModifier : Modifier
{
public Vector2 Direction { get; set; }
public float Strength { get; set; }
public override unsafe void Update(float elapsedSeconds, ParticleBuffer.ParticleIterator iterator)
{
var vector = Direction*(Strength*elapsedSeconds);
while (iterator.HasNext)
{
var particle = iterator.Next();
particle->Velocity = new Vector2(
particle->Velocity.X + vector.X*particle->Mass,
particle->Velocity.Y + vector.Y*particle->Mass);
}
}
}
}
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