public unsafe void Update(ParticleSystem particleSystem, float dt)
{
var accelerationField = particleSystem.GetOrCreateField(ParticleFields.Acceleration);
foreach (var particle in particleSystem)
{
var acceleration = (Vector3*)particle[accelerationField];
*acceleration += GravityForce;
}
}
public void Update(ParticleSystem particleSystem, float dt)
{
var velocityField = particleSystem.GetOrCreateField(ParticleFields.Velocity);
// No more than 1000 particles
if (particleSystem.ParticleCount < 1000)
{
var particle = particleSystem.AddParticle();
// Default random velocity, going upward
particle.Set(velocityField, new Vector3((float)rand.NextDouble() * 30.0f - 15.0f, (float)rand.NextDouble() * 30.0f - 15.0f, (float)rand.NextDouble() * 50.0f));
}
}
public unsafe void Update(ParticleSystem particleSystem, float dt)
{
var lifetimeField = particleSystem.GetOrCreateField(LifetimeField);
// Iterate over particles
var particleEnumerator = particleSystem.GetEnumerator();
while (particleEnumerator.MoveNext())
{
var particle = particleEnumerator.Current;
var lifetime = (float*)particle[lifetimeField];
// Remove particle through enumerator.
// Enumerator will be valid again in next loop.
if ((*lifetime += dt) > Lifetime)
particleEnumerator.RemoveParticle();
}
}
public unsafe void Update(ParticleSystem particleSystem, float dt)
{
var accelerationField = particleSystem.GetOrCreateField(ParticleFields.Acceleration);
var velocityField = particleSystem.GetOrCreateField(ParticleFields.Velocity);
foreach (var particle in particleSystem)
{
var position = (Vector3*)particle[particleSystem.Position];
var acceleration = (Vector3*)particle[accelerationField];
var velocity = (Vector3*)particle[velocityField];
*velocity += *acceleration * dt;
*position += *velocity * dt;
}
}