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using Microsoft.Xna.Framework;
namespace MonoGame.Extended.Particles.Modifiers
{
public class DragModifier : Modifier
{
public float DragCoefficient { get; set; } = 0.47f;
public float Density { get; set; } = .5f;
public override unsafe void Update(float elapsedSeconds, ParticleBuffer.ParticleIterator iterator)
{
while (iterator.HasNext)
{
var particle = iterator.Next();
var drag = -DragCoefficient*Density*particle->Mass*elapsedSeconds;
particle->Velocity = new Vector2(
particle->Velocity.X + particle->Velocity.X*drag,
particle->Velocity.Y + particle->Velocity.Y*drag);
}
}
}
}
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