private Vector3 GetForce(Particle particle)
{
float distFromWall = boundingSphere.Radius - (particle.Position - boundingSphere.Center).LengthSquared();
float distFromSphere = (particle.Position - spherePosition).LengthSquared();
//Vector3 force = Vector3.Zero;
Vector3 force = rng.NextVector3(-0.0005f, 0.0005f, -0.0005f, 0.0005f);
//Vector3 force = 5f / (distFromWall) * Vector3.Normalize(boundingSphere.Center - particle.Position);
force += sphereSign * 500f / (distFromSphere + 20000) * Vector3.Normalize(particle.Position - spherePosition);
//force += 0.01f * Vector3.Transform(force, deltayprQ);
return force;
}
private Color GetParticleColor(Particle particle)
{
var vel = particle.Velocity.Length();
vel /= 100f;
return FromHsl(MathHelper.Lerp(0.75f, 0.1f, MathHelper.Clamp(vel, 0, 1)), particle.Saturation, MathHelper.Clamp(vel, 0.4f, 0.6f));
}
private void ResetParticles()
{
while (particles.Count < particleCount)
SpawnParticles();
for (int i = 0; i < particles.Count; ++i)
{
particles[i] = new Particle(new Vector3(0, 0, 0), rng.NextVector3(0.1f, 5f), particles[i].Mass, particles[i].Saturation);
}
}