public override void Update(float delta)
{
Frame = RelativeFrame.FromPoint(Body, Vector3.Zero);
DxVector3 position = new DxVector3(Body.LinearPosition.X, Body.LinearPosition.Y, Body.LinearPosition.Z);
DxQuaternion quat = new DxQuaternion(Body.AngularPosition.X, Body.AngularPosition.Y, Body.AngularPosition.Z, Body.AngularPosition.W);
Transform = Matrix.RotationQuaternion(quat) * Matrix.Translation(position);
Vector3 steering = new Vector3();
steering.X = (Frame.LinearPosition.X < 0) ? 3 : -3;
steering.Z = (Frame.LinearPosition.Z < 0) ? 3 : -3;
const int Thrust = 150;
steering.Y = Thrust;
if (Frame.LinearPosition.Y > 0)
{
steering.Y = Math.Min(Thrust, Frame.LinearPosition.Y + 20);
}
//Body.AccumulateLocalCentralForce(force);
Body.AccumulateLocalForce(steering, new Vector3(0, -2, 0));
//Body.AccumulateGlobalCentralForce(new Vector3(y: -9.81f));
Body.LinearDampening = new Vector3(0.5f);
Body.AngularDampening = new Vector3(0.5f);
Body.Integrate(delta);
Body.ClearForces();
// Eject particles
countdown += delta;
while (countdown > 0.01f)
{
var body = new Body();
body.LinearPosition = RelativeFrame.ToGlobalPoint(Body, new Vector3(y: -8));
body.LinearVelocity = Body.LinearVelocity;
body.AngularPosition = Body.AngularPosition;
body.ApplyLocalCentralImpulse(new Vector3(0, -steering.Y, 0));
body.AccumulateGlobalCentralForce(new Vector3(y: 10));
body.LinearDampening = new Vector3(0.2f);
Particles.Insert(0, body);
countdown -= 0.01f;
}
if (Particles.Count > 100)
{
Particles.RemoveRange(100, Particles.Count - 100);
}
ParticleMesh.IndexCount = Particles.Count;
for (int i = 0; i < Particles.Count; i++)
{
Particles[i].Integrate(delta);
ParticleMesh.Dynamic[i].Position = Particles[i].LinearPosition;
}
ParticleMesh.UpdateDynamic();
}
public void Update()
{
if (!Dead)
{
if (Finished)
{
Dead = true;
}
else
{
if (shouldAdd && Enabled)
{
Particle particle = DefaultParticle;
if (Settings.Burst)
{
for (int i = 0; i < Settings.BurstSize; i++)
{
if (!Settings.SpawnInCircle)
{
particle = new Particle(Settings, Rectangle.RandomVectorInside());
}
else
{
particle = new Particle(Settings, Helper.RandomPointOnCircle(Position, Helper.Rand.Next(Settings.CircleRadius)));
}
}
shouldAdd = false;
}
else if (decimalDensity)
{
if (currentDensity >= 1)
{
if (Scale == Vector2.Zero)
{
particle = new Particle(Settings, Position);
}
else
{
if (!Settings.SpawnInCircle)
{
particle = new Particle(Settings, Rectangle.RandomVectorInside());
}
else
{
particle = new Particle(Settings, Helper.RandomPointOnCircle(Position, Helper.Rand.Next(Settings.CircleRadius)));
}
}
currentDensity = 0;
}
else
{
currentDensity += Game.DeltaTime * Settings.DensityIncreaser;
}
}
else
{
for (int i = 0; i < Settings.Density; i++)
{
if (Scale == Vector2.Zero)
{
particle = new Particle(Settings, Position);
}
else
{
if (!Settings.SpawnInCircle)
{
particle = new Particle(Settings, Rectangle.RandomVectorInside());
}
else
{
particle = new Particle(Settings, Helper.RandomPointOnCircle(Position, Helper.Rand.Next(Settings.CircleRadius)));
}
}
}
}
if (particle != DefaultParticle)
{
if (!Settings.SpawnParticleAtTheEnd)
{
Particles.Insert(0, particle);
}
else
{
Particles.Add(particle);
}
}
if (Settings.OneTime)
{
lifetime -= Game.DeltaTime;
if (lifetime < 0)
{
shouldAdd = false;
}
}
}
if (Particles.Count == 0 && !shouldAdd)
{
Finished = true;
}
if (Settings.MaxParticles != 0 && Particles.Count > Settings.MaxParticles)
{
int count = Particles.Count - Settings.MaxParticles - 1;
if (!Settings.SpawnParticleAtTheEnd)
{
Particles.RemoveRange(Settings.MaxParticles + 1, count);
}
else
{
Particles.RemoveRange(0, count);
}
}
foreach (var p in Particles.ToArray())
{
if (p.Dead)
{
Particles.Remove(p);
}
else
{
p.Update();
}
}
}
}
}
