/// <inheritdoc/>
public override unsafe void Update(float dt, ParticlePool pool)
{
if (!pool.FieldExists(ParticleFields.Position) || !pool.FieldExists(ParticleFields.Velocity))
{
return;
}
var posField = pool.GetField(ParticleFields.Position);
var velField = pool.GetField(ParticleFields.Velocity);
var lifeField = pool.GetField(ParticleFields.Life);
foreach (var particle in pool)
{
var surfacePoint = new Vector3(0, 0, 0);
var surfaceNormal = new Vector3(0, 1, 0);
var particlePos = (*((Vector3 *)particle[posField]));
var particleVel = (*((Vector3 *)particle[velField]));
var isInside = false;
if (FieldShape != null)
{
FieldShape.PreUpdateField(WorldPosition, WorldRotation, WorldScale);
isInside = FieldShape.IsPointInside(particlePos, out surfacePoint, out surfaceNormal);
}
if (IsHollow != isInside)
{
if (IsHollow)
{
surfaceNormal *= -1;
}
// The particle is on the wrong side of the collision shape and must collide
(*((Vector3 *)particle[posField])) = surfacePoint;
var verIncidentCoef = Vector3.Dot(surfaceNormal, particleVel);
var verticalIncidentVelocity = verIncidentCoef * surfaceNormal;
var horizontalIncidentVelocity = particleVel - verticalIncidentVelocity;
particleVel = horizontalIncidentVelocity * (1 - Friction) +
verticalIncidentVelocity * ((verIncidentCoef > 0) ? Restitution : -Restitution);
(*((Vector3 *)particle[velField])) = particleVel;
// TODO Maybe set some collision flags if other calculations depend on them
// Possibly kill the particle
if (KillParticles)
{
// Don't set the particle's life directly to 0 just yet - it might need to spawn other particles on impact
(*((float *)particle[lifeField])) = MathUtil.ZeroTolerance;
}
}
}
}
/// <inheritdoc />
public override unsafe void Update(float dt, ParticlePool pool)
{
// The force field operates over position and velocity. If the particles don't have such fields we can't run this update
if (!pool.FieldExists(ParticleFields.Position) || !pool.FieldExists(ParticleFields.Velocity))
{
return;
}
var posField = pool.GetField(ParticleFields.Position);
var velField = pool.GetField(ParticleFields.Velocity);
// Depending on our settings some of the energy will be lost (it directly translates to changes in position)
// and some of the energy will be preserved (it translates to changes in velocity)
var directToPosition = 1f - EnergyConservation;
foreach (var particle in pool)
{
var alongAxis = new Vector3(0, 1, 0);
var awayAxis = new Vector3(0, 0, 1);
var aroundAxis = new Vector3(1, 0, 0);
var particlePos = (*((Vector3 *)particle[posField]));
var particleVel = (*((Vector3 *)particle[velField]));
var forceMagnitude = 1f;
if (FieldShape != null)
{
FieldShape.PreUpdateField(WorldPosition, WorldRotation, WorldScale);
forceMagnitude = FieldShape.GetDistanceToCenter(particlePos, particleVel, out alongAxis, out aroundAxis, out awayAxis);
forceMagnitude = FieldFalloff.GetStrength(forceMagnitude);
}
forceMagnitude *= dt * parentScale;
var totalForceVector = ForceFixed +
alongAxis * ForceDirected +
aroundAxis * ForceVortex +
awayAxis * ForceRepulsive;
totalForceVector *= forceMagnitude;
// Force contribution to velocity - conserved energy
var vectorContribution = totalForceVector * EnergyConservation;
(*((Vector3 *)particle[velField])) += vectorContribution;
// Force contribution to position - lost energy
vectorContribution = (vectorContribution * (dt * 0.5f)) + (totalForceVector * directToPosition);
(*((Vector3 *)particle[posField])) += vectorContribution;
}
}
public override unsafe void Update(float dt, ParticlePool pool)
{
if (!pool.FieldExists(ParticleFields.Position) || !pool.FieldExists(ParticleFields.Velocity))
{
return;
}
var posField = pool.GetField(ParticleFields.Position);
var velField = pool.GetField(ParticleFields.Velocity);
// var colField = pool.GetField(ParticleFields.Color);
var directToPosition = 1f - EnergyConservation;
foreach (var particle in pool)
{
var alongAxis = new Vector3(0, 1, 0);
var awayAxis = new Vector3(0, 0, 1);
var aroundAxis = new Vector3(1, 0, 0);
var particlePos = (*((Vector3 *)particle[posField]));
var particleVel = (*((Vector3 *)particle[velField]));
var forceMagnitude = 1f;
if (FieldShape != null)
{
FieldShape.PreUpdateField(WorldPosition, WorldRotation, WorldScale);
forceMagnitude = FieldShape.GetDistanceToCenter(particlePos, particleVel, out alongAxis, out aroundAxis, out awayAxis);
forceMagnitude = FieldFalloff.GetStrength(forceMagnitude);
}
forceMagnitude *= dt * parentScale;
var totalForceVector = ForceFixed +
alongAxis * ForceDirected +
aroundAxis * ForceVortex +
awayAxis * ForceRepulsive;
totalForceVector *= forceMagnitude;
// Force contribution to velocity - conserved energy
var vectorContribution = totalForceVector * EnergyConservation;
(*((Vector3 *)particle[velField])) += vectorContribution;
// Force contribution to position - lost energy
vectorContribution = (vectorContribution * (dt * 0.5f)) + (totalForceVector * directToPosition);
(*((Vector3 *)particle[posField])) += vectorContribution;
}
}
