/// <summary>
///
/// </summary>
/// <param name="system"></param>
/// <param name="emitter"></param>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="minks">Minimum Spring Constant</param>
/// <param name="maxks">Maximum Spring Constant</param>
/// <param name="minkd">Minimum Dampening Constant</param>
/// <param name="maxkd">Maximum Dampening Constant</param>
/// <param name="minrest">Minimum Rest Length</param>
/// <param name="maxrest">Maximum Rest Length</param>
public Meatball(ParticleSystem system, Emitter emitter, double x, double y,
double minks, double maxks, double minkd, double maxkd, double minrest,
double maxrest, bool anchored)
{
// create thre particles
mParticles[0] = new Particle();
mParticles[0].IsAnchor = anchored; // anchors the first particle if so desired
mParticles[1] = new Particle();
mParticles[2] = new Particle();
// update the particles
Update(emitter, x, y);
// Create the spring between particles 0 and 1
Spring s = new Spring();
s.ThisParticle = mParticles[0];
s.ConnectedParticle = mParticles[1];
s.SpringConstant = ParticleSystem.random.NextDouble(minks, maxks); //1.0, 4.0);
s.DampingConstant = ParticleSystem.random.NextDouble(minkd, maxkd); //0.10, 0.30);
s.RestLength = ParticleSystem.random.NextDouble(minrest, maxrest); //1.0, 6.0);
mParticles[0].Connections.Add(s);
mParticles[1].Connections.Add(s);
//system.Forces.Add(s);
// Create the spring between particles 0 and 2
s = new Spring();
s.ThisParticle = mParticles[0];
s.ConnectedParticle = mParticles[2];
s.SpringConstant = ParticleSystem.random.NextDouble(minks, maxks); //1.0, 4.0);
s.DampingConstant = ParticleSystem.random.NextDouble(minkd, maxkd); //0.10, 0.30);
s.RestLength = ParticleSystem.random.NextDouble(minrest, maxrest); //1.0, 6.0);
mParticles[0].Connections.Add(s);
mParticles[2].Connections.Add(s);
//system.Forces.Add(s);
// Create the spring between particles 1 and 2
s = new Spring();
s.ThisParticle = mParticles[1];
s.ConnectedParticle = mParticles[2];
s.SpringConstant = ParticleSystem.random.NextDouble(minks, maxks); //1.0, 4.0);
s.DampingConstant = ParticleSystem.random.NextDouble(minkd, maxkd); //0.10, 0.30);
s.RestLength = ParticleSystem.random.NextDouble(minrest, maxrest); //1.0, 6.0);
mParticles[1].Connections.Add(s);
mParticles[2].Connections.Add(s);
//system.Forces.Add(s);
// Add the particles to the system
system.Particles.Add(mParticles[0]);
system.Particles.Add(mParticles[1]);
system.Particles.Add(mParticles[2]);
}
/// <summary>
/// Update a meatball
/// </summary>
/// <param name="emitter"></param>
/// <param name="x"></param>
/// <param name="y"></param>
public void Update(Emitter emitter, double x, double y)
{
// All particles should have the same lifespan, so only calculate it once.
double life = ParticleSystem.random.NextDouble(emitter.MinLifeSpan, emitter.MaxLifeSpan);
// inti every particle in the particle list
foreach (Particle particle in mParticles)
{
particle.Owner = emitter;
particle.Mass = (float)ParticleSystem.random.NextDouble(emitter.MinMass, emitter.MaxMass);
particle.StartOpacity = emitter.StartOpacity;
particle.EndOpacity = emitter.EndOpacity;
particle.Force = new Vector(0, 0);
particle.Velocity = new Vector(
ParticleSystem.random.NextDouble(emitter.MinHorizontalVelocity, emitter.MaxHorizontalVelocity),
ParticleSystem.random.NextDouble(emitter.MinVerticalVelocity, emitter.MaxVerticalVelocity));
particle.LifeSpan = life;
particle.Position = new Point(x + ParticleSystem.random.NextDouble(emitter.MinPositionOffsetX, emitter.MaxPositionOffsetX),
y + ParticleSystem.random.NextDouble(emitter.MinPositionOffsetY, emitter.MaxPositionOffsetY));
particle.BackgroundColors = emitter.ColorKeyFrames;
}
}
