public void Update(TimeStep timeStep, DVector2 enginePosition, DVector2 shipVelocity,
double rotation, double throttle, double ispMultiplier)
{
double retrograde = rotation + Math.PI + _angle;
int particles = (int)((throttle * _particleRate) / timeStep.UpdateLoops);
// Interpolate between spreads based on ISP
double spreadMultiplier = (1.0 - ispMultiplier) * _minSpread + ispMultiplier * _maxSpread;
// Add new particles if nessecary
for (int i = 0; i < particles; i++)
{
if (_availableParticles.Count > 0)
{
double velocityFactor = _random.Next(200, 300);
double spread = _random.NextDouble() - 0.5;
DVector2 velocity = DVector2.FromAngle(retrograde + spread * spreadMultiplier);
int id = _availableParticles.Dequeue();
Particle particle = _particles[id];
particle.IsActive = true;
particle.Age = 0;
particle.MaxAge = _random.NextDouble() * 0.05 + _maxAge;
particle.Position = enginePosition.Clone();
particle.Velocity = shipVelocity.Clone() + velocity * velocityFactor;
}
}
// Update the particles
for (int i = 0; i < _particles.Length; i++)
{
Particle particle = _particles[i];
if (particle.IsActive)
{
particle.Position += particle.Velocity * timeStep.Dt;
particle.Age += timeStep.Dt;
if (particle.Age > particle.MaxAge)
{
particle.IsActive = false;
_availableParticles.Enqueue(i);
}
}
}
}
public void Update(TimeStep timeStep, DVector2 shipPosition, DVector2 shipVelocity, double pitch, double heatingRate)
{
double rotation = pitch - _offsetAngle;
DVector2 offset = new DVector2(Math.Cos(rotation), Math.Sin(rotation)) * _offsetLength;
DVector2 shockPosition = shipPosition - offset;
double normalizedHeating = Math.Max((heatingRate - 500000) * 0.0005, 0);
int particles = (int)(normalizedHeating * _particleRate) / timeStep.UpdateLoops;
// Add new particles if nessecary
for (int i = 0; i < particles; i++)
{
if (_availableParticles.Count > 0)
{
double velocityFactor = _random.Next(50, 200);
double spread = _random.NextDouble() * 2.5 - 1.25;
DVector2 velocity = DVector2.FromAngle(rotation + spread);
int id = _availableParticles.Dequeue();
Particle particle = _particles[id];
particle.IsActive = true;
particle.Age = 0;
particle.MaxAge = _random.NextDouble()*0.01 + 0.02;
particle.Position = shockPosition.Clone();
particle.Velocity = shipVelocity.Clone() + velocity*velocityFactor;
}
}
// Update the particles
for (int i = 0; i < _particles.Length; i++)
{
Particle particle = _particles[i];
if (particle.IsActive)
{
particle.Position += particle.Velocity*timeStep.Dt;
particle.Age += timeStep.Dt;
if (particle.Age > particle.MaxAge)
{
particle.IsActive = false;
_availableParticles.Enqueue(i);
}
}
}
}
public void Update(TimeStep timeStep, DVector2 enginePosition, DVector2 shipVelocity, double rotation, double throttle)
{
double retrograde = rotation + Math.PI;
int particles = (int)((throttle * _particleRate) / timeStep.UpdateLoops);
// Add new particles if nessecary
for (int i = 0; i < particles; i++)
{
if (_availableParticles.Count > 0)
{
double velocityFactor = _random.Next(150, 250);
double spread = _random.NextDouble() - 0.5;
DVector2 velocity = DVector2.FromAngle(retrograde + spread * _spreadFactor);
int id = _availableParticles.Dequeue();
Particle particle = _particles[id];
particle.IsActive = true;
particle.Age = 0;
particle.MaxAge = _random.NextDouble() * 0.1 + 0.05;
particle.Position = enginePosition.Clone();
particle.Velocity = shipVelocity.Clone() + velocity * velocityFactor;
}
}
// Update the particles
for (int i = 0; i < _particles.Length; i++)
{
Particle particle = _particles[i];
if (particle.IsActive)
{
particle.Position += particle.Velocity * timeStep.Dt;
particle.Age += timeStep.Dt;
if (particle.Age > particle.MaxAge)
{
particle.IsActive = false;
_availableParticles.Enqueue(i);
}
}
}
}
