public void CreateScenario(ParticleSystem a_ParticleSystem)
{
const int internalParticles = 8; //amount of particles in hair is this + 2
Vector2 start = new Vector2(-4f, 0f);
Vector2 end = new Vector2(4f, 0f);
Vector2 step = (end - start) / (internalParticles + 1);
for (int i = 0; i <= internalParticles + 1; i++)
{
Particle p = new Particle(1f);
p.Position = start + step * i;
a_ParticleSystem.AddParticle(p);
}
//m_ParticleSystem.AddForce(new GravityForce(0.1f));
float rest = step.magnitude;
float ks = 2f;
float kd = 1f;
for (int i = 0; i <= internalParticles; i++)
{
a_ParticleSystem.AddForce(new HooksLawSpring(a_ParticleSystem.Particles[i], a_ParticleSystem.Particles[i + 1], rest, ks, kd));
}
ks = 2f;
kd = 1f;
float angle = 3 * Mathf.PI / 4;
for (int i = 1; i <= internalParticles; i++)
{
a_ParticleSystem.AddForce(new AngularSpringForce(a_ParticleSystem.Particles[i], a_ParticleSystem.Particles[i - 1],
a_ParticleSystem.Particles[i + 1], angle, ks, kd));
}
a_ParticleSystem.AddForce(new ViscousDragForce(1f));
}
public void CreateScenario(ParticleSystem a_ParticleSystem)
{
Particle p1 = new Particle(1f);
p1.Position = new Vector2(3, 4);
Particle p2 = new Particle(1f);
p2.Position = new Vector2(-3, 4);
a_ParticleSystem.AddParticle(p1);
a_ParticleSystem.AddParticle(p2);
new CircularWireConstraint(p1, p1.Position + Vector2.right, a_ParticleSystem);
new CircularWireConstraint(p2, p2.Position + Vector2.left, a_ParticleSystem);
Particle p3 = new Particle(1);
p3.Position = new Vector2(3, 2);
Particle p4 = new Particle(1);
p4.Position = new Vector2(-3, 2);
Particle p5 = new Particle(1);
p5.Position = new Vector2(-4, 0);
Particle p6 = new Particle(1);
p6.Position = new Vector2(0, 0);
Particle p7 = new Particle(1);
p7.Position = new Vector2(4, 0);
a_ParticleSystem.AddParticle(p3);
a_ParticleSystem.AddParticle(p4);
a_ParticleSystem.AddParticle(p5);
a_ParticleSystem.AddParticle(p6);
a_ParticleSystem.AddParticle(p7);
Force f1 = new HooksLawSpring(p1, p3, 1, 1, 1f);
Force f2 = new HooksLawSpring(p2, p4, 1, 1, 1f);
Force f3 = new HooksLawSpring(p3, p7, 1, 1, 1f);
Force f4 = new HooksLawSpring(p3, p6, 1, 1, 1f);
Force f5 = new HooksLawSpring(p4, p6, 1, 1, 1f);
Force f6 = new HooksLawSpring(p4, p5, 1, 1, 1f);
Force f7 = new HooksLawSpring(p7, p6, 3, 1, 1f);
Force f8 = new HooksLawSpring(p7, p5, 3, 1, 1f);
Force f9 = new HooksLawSpring(p6, p5, 3, 1, 1f);
a_ParticleSystem.AddForce(f1);
a_ParticleSystem.AddForce(f2);
a_ParticleSystem.AddForce(f3);
a_ParticleSystem.AddForce(f4);
a_ParticleSystem.AddForce(f5);
a_ParticleSystem.AddForce(f6);
a_ParticleSystem.AddForce(f7);
a_ParticleSystem.AddForce(f8);
a_ParticleSystem.AddForce(f9);
a_ParticleSystem.AddForce(new GravityForce(.1f));
}
public void CreateScenario(ParticleSystem a_ParticleSystem)
{
const float flatness = .95f;
Vector2 a = new Vector2(4, -6);
Vector2 a2 = new Vector2(a.y, -a.x);
Vector2 b = new Vector2(-a.x / 2, -a.y / 2);
Particle p1 = new Particle(1);
p1.Position = b;
a_ParticleSystem.AddParticle(p1);
Vector2 f1 = p1.Position + (1 - flatness) * a;
Vector2 f2 = p1.Position + flatness * a;
new EllipticalWireConstraint(p1, f1, f2, a_ParticleSystem);
Particle p2 = new Particle(1);
p2.Position = b;
a_ParticleSystem.AddParticle(p2);
new AnyLineConstraint(p2, a, a_ParticleSystem);
Particle p3 = new Particle(1);
p3.Position = new Vector2(0, 0);
a_ParticleSystem.AddParticle(p3);
new AnyLineConstraint(p3, a2, a_ParticleSystem);
a_ParticleSystem.AddForce(new HooksLawSpring(p1, p2, 0, 5, 1));
a_ParticleSystem.AddForce(new HooksLawSpring(p1, p3, 0, 1, 1));
Particle q1 = new Particle(1);
Particle q2 = new Particle(1);
q1.Position = f1;
q2.Position = f2;
a_ParticleSystem.AddParticle(q1);
a_ParticleSystem.AddParticle(q2);
new FixedPointConstraint(q1, a_ParticleSystem);
new FixedPointConstraint(q2, a_ParticleSystem);
Particle p4 = new Particle(1);
p4.Position = p1.Position + a;
a_ParticleSystem.AddParticle(p4);
new EllipticalWireConstraint(p4, f1, f2, a_ParticleSystem);
a_ParticleSystem.AddForce(new HooksLawSpring(q1, p4, 0, 0, 0));
a_ParticleSystem.AddForce(new HooksLawSpring(q2, p4, 0, 0, 0));
}
public void CreateScenario(ParticleSystem a_ParticleSystem)
{
int max = 10;
int max1 = max - 1;
for (int i = 0; i < max; i++)
{
int y = i >= max / 2 ? 0 : 4;
float x = i >= max / 2 ? 3 * (i - max / 2) - 6 : 3 * i - 6;
createPendulum(a_ParticleSystem, x, y, .5f, i + 2);
}
Force f = new GravityForce(1f);
a_ParticleSystem.AddForce(f);
f = new ViscousDragForce(.05f);
a_ParticleSystem.AddForce(f);
}
public void CreateScenario(ParticleSystem a_ParticleSystem)
{
Particle p1 = new Particle(1f);
p1.Position = new Vector2(0, 3);
a_ParticleSystem.AddParticle(p1);
new CircularWireConstraint(p1, p1.Position + new Vector2(1, -1), a_ParticleSystem);
new CircularWireConstraint(p1, p1.Position + new Vector2(-1, -1), a_ParticleSystem);
Particle p2 = new Particle(1);
a_ParticleSystem.AddParticle(p2);
p2.Position = new Vector2(3, 3);
new RodConstraint(p1, p2, a_ParticleSystem);
Particle p3 = new Particle(1);
Particle p4 = new Particle(1);
Particle p5 = new Particle(1);
p3.Position = new Vector2(3, 1);
p4.Position = new Vector2(2, 0);
p5.Position = new Vector2(4, 0);
a_ParticleSystem.AddParticle(p3);
a_ParticleSystem.AddParticle(p4);
a_ParticleSystem.AddParticle(p5);
a_ParticleSystem.AddForce(new HooksLawSpring(p3, p4, Mathf.Sqrt(2), 2, 1));
a_ParticleSystem.AddForce(new HooksLawSpring(p3, p5, Mathf.Sqrt(2), 2, 1));
a_ParticleSystem.AddForce(new HooksLawSpring(p5, p4, 2, 2, 1));
a_ParticleSystem.AddForce(new HooksLawSpring(p2, p3, 2, 5, 1));
a_ParticleSystem.AddForce(new GravityForce(.2f));
Particle p6 = new Particle(1);
p6.Position = new Vector2(-3, 4);
a_ParticleSystem.AddParticle(p6);
new HLineConstraint(p6, a_ParticleSystem);
new VLineConstraint(p6, a_ParticleSystem);
}
public void CreateScenario(ParticleSystem a_ParticleSystem)
{
ViscousDragForce drag = new ViscousDragForce(0.1f);
a_ParticleSystem.AddForce(drag);
GravityForce gravity = new GravityForce(0.1f);
a_ParticleSystem.AddForce(gravity);
Particle p1 = new Particle(1f);
p1.Position = new Vector2(-3f, 0f);
a_ParticleSystem.AddParticle(p1);
Particle p2 = new Particle(1f);
p2.Position = new Vector2(3f, 0f);
a_ParticleSystem.AddParticle(p2);
HooksLawSpring spring1 = new HooksLawSpring(p1, p2, 3f, 10f, 10f);
a_ParticleSystem.AddForce(spring1);
}
public void CreateScenario(ParticleSystem a_ParticleSystem)
{
const float flatness = .975f;
Vector2 dir = new Vector2(2, -8);
Vector2 dir2 = new Vector2(2, 8);
Particle p1 = new Particle(1);
p1.Position = new Vector2(-6, 4);
a_ParticleSystem.AddParticle(p1);
new EllipticalWireConstraint(p1, p1.Position + (1 - flatness) * dir, p1.Position + flatness * dir, a_ParticleSystem);
Particle p2 = new Particle(1);
p2.Position = new Vector2(-3, -4);
a_ParticleSystem.AddParticle(p2);
new EllipticalWireConstraint(p2, p2.Position + flatness * dir2, p2.Position + (1 - flatness) * dir2, a_ParticleSystem);
Particle p3 = new Particle(1);
p3.Position = new Vector2(0, 4);
a_ParticleSystem.AddParticle(p3);
new EllipticalWireConstraint(p3, p3.Position + (1 - flatness) * dir, p3.Position + flatness * dir, a_ParticleSystem);
Particle p4 = new Particle(1);
p4.Position = new Vector2(3, -4);
a_ParticleSystem.AddParticle(p4);
new EllipticalWireConstraint(p4, p4.Position + flatness * dir2, p4.Position + (1 - flatness) * dir2, a_ParticleSystem);
a_ParticleSystem.AddForce(new HooksLawSpring(p1, p3, (p1.Position - p3.Position).magnitude, 1, 1));
a_ParticleSystem.AddForce(new HooksLawSpring(p2, p4, (p2.Position - p4.Position).magnitude, 1, 1));
//a_ParticleSystem.AddForce(new HooksLawSpring(p3, p4, (p3.Position - p4.Position).magnitude, 1, 1));
Particle p5 = new Particle(1);
p5.Position = new Vector2(6, 0);
a_ParticleSystem.AddParticle(p5);
new HLineConstraint(p5, a_ParticleSystem);
Particle p6 = new Particle(1);
p6.Position = new Vector2(6, 0);
a_ParticleSystem.AddParticle(p6);
new HLineConstraint(p6, a_ParticleSystem);
a_ParticleSystem.AddForce(new HooksLawSpring(p1, p5, 1, 1));
a_ParticleSystem.AddForce(new HooksLawSpring(p2, p6, 1, 1));
a_ParticleSystem.AddForce(new HooksLawSpring(p3, p5, 1, 1));
a_ParticleSystem.AddForce(new HooksLawSpring(p4, p6, 1, 1));
}
private void HandleUserInteraction()
{
if (Input.touchSupported)
{
if (Input.touchCount > 0)
{
Touch[] touches = Input.touches;
for (int i = 0; i < touches.Length; ++i)
{
Touch touch = touches[i];
int id = touch.fingerId;
Vector3 touchPos3D = Camera.main.ScreenToWorldPoint(touch.position);
Vector2 touchPos = new Vector2(touchPos3D.x, touchPos3D.y);
if (touch.phase == TouchPhase.Began)
{
Particle closestParticle;
if (GetClosestParticle(touchPos, m_ParticleSelectThreshold, out closestParticle))
{
MouseSpringForce touchForce = new MouseSpringForce(closestParticle, touchPos, m_MouseSelectRestLength, m_MouseSelectSpringConstant, m_MouseSelectDampingConstant);
// This should never happen, but adding anyway for robustness:
MouseSpringForce existingForce;
if (m_TouchForces.TryGetValue(id, out existingForce))
{
m_ParticleSystem.RemoveForce(existingForce);
}
m_TouchForces[id] = touchForce;
m_ParticleSystem.AddForce(touchForce);
}
}
else if (touch.phase == TouchPhase.Moved)
{
MouseSpringForce existingForce;
if (m_TouchForces.TryGetValue(id, out existingForce))
{
existingForce.UpdateMousePosition(touchPos);
}
}
else if (touch.phase == TouchPhase.Canceled || touch.phase == TouchPhase.Ended)
{
MouseSpringForce existingForce;
if (m_TouchForces.TryGetValue(id, out existingForce))
{
m_ParticleSystem.RemoveForce(existingForce);
m_TouchForces.Remove(id);
}
}
}
}
}
if (Input.mousePresent && Input.touchCount == 0)
{
Vector3 mousePos3D = Camera.main.ScreenToWorldPoint(Input.mousePosition);
Vector2 mousePos = new Vector2(mousePos3D.x, mousePos3D.y);
if (!m_HasMouseSelection && Input.GetMouseButtonDown(0))
{
Particle closestParticle;
if (GetClosestParticle(mousePos, m_ParticleSelectThreshold, out closestParticle))
{
m_CurrentMouseForce = new MouseSpringForce(closestParticle, mousePos, m_MouseSelectRestLength,
m_MouseSelectSpringConstant, m_MouseSelectDampingConstant);
m_ParticleSystem.AddForce(m_CurrentMouseForce);
m_HasMouseSelection = true;
}
}
else if (m_HasMouseSelection && Input.GetMouseButtonDown(1))
{
m_ParticleSystem.RemoveForce(m_CurrentMouseForce);
m_CurrentMouseForce = null;
m_HasMouseSelection = false;
}
else if (m_HasMouseSelection)
{
m_CurrentMouseForce.UpdateMousePosition(mousePos);
}
}
}
public void CreateScenario(ParticleSystem a_ParticleSystem)
{
const float particleMass = 1f;
Particle p1 = new Particle(particleMass);
p1.Position = new Vector2(-3f, 3.5f);
a_ParticleSystem.AddParticle(p1);
new CircularWireConstraint(p1, new Vector2(-2f, 3.5f), a_ParticleSystem);
Particle p3 = new Particle(particleMass);
p3.Position = p1.Position + new Vector2(0.5f, 0f);
a_ParticleSystem.AddParticle(p3);
new RodConstraint(p1, p3, a_ParticleSystem);
Particle p2 = new Particle(particleMass);
p2.Position = new Vector2(2f, 3.5f);
a_ParticleSystem.AddParticle(p2);
new CircularWireConstraint(p2, new Vector2(3f, 3.5f), a_ParticleSystem);
Particle p4 = new Particle(particleMass);
p4.Position = p2.Position + new Vector2(0.5f, 0f);
a_ParticleSystem.AddParticle(p4);
new RodConstraint(p2, p4, a_ParticleSystem);
new RodConstraint(p3, p4, a_ParticleSystem);
// With springs
const float springConstant = 75f;
const float dampingConstant = 40f;
Particle p5 = new Particle(particleMass);
p5.Position = new Vector2(-3f, 1);
a_ParticleSystem.AddParticle(p5);
new CircularWireConstraint(p5, new Vector2(-2f, 1), a_ParticleSystem);
Particle p6 = new Particle(particleMass);
p6.Position = p5.Position + new Vector2(0.5f, 1f);
a_ParticleSystem.AddParticle(p6);
HooksLawSpring s1 = new HooksLawSpring(p5, p6, 0.5f, springConstant, dampingConstant);
a_ParticleSystem.AddForce(s1);
Particle p7 = new Particle(particleMass);
p7.Position = new Vector2(2f, 1);
a_ParticleSystem.AddParticle(p7);
new CircularWireConstraint(p7, new Vector2(3f, 1), a_ParticleSystem);
Particle p8 = new Particle(particleMass);
p8.Position = p7.Position + new Vector2(0.5f, 1f);
a_ParticleSystem.AddParticle(p8);
HooksLawSpring s2 = new HooksLawSpring(p7, p8, 0.5f, springConstant, dampingConstant);
a_ParticleSystem.AddForce(s2);
new RodConstraint(p6, p8, a_ParticleSystem);
Particle q1 = new Particle(particleMass);
q1.Position = new Vector2(-3f, -1.5f);
a_ParticleSystem.AddParticle(q1);
new CircularWireConstraint(q1, new Vector2(-2f, -1.5f), a_ParticleSystem);
Particle q2 = new Particle(particleMass);
q2.Position = new Vector2(2f, -1.5f);
a_ParticleSystem.AddParticle(q2);
new CircularWireConstraint(q2, new Vector2(3f, -1.5f), a_ParticleSystem);
new RodConstraint(q1, q2, a_ParticleSystem);
Particle a1 = new Particle(1);
Particle a2 = new Particle(1);
Particle a3 = new Particle(1);
Particle a4 = new Particle(1);
a1.Position = new Vector2(-4, -3);
a2.Position = new Vector2(0, -3);
a3.Position = new Vector2(0, -5);
a4.Position = new Vector2(4, -5);
a_ParticleSystem.AddParticle(a1);
a_ParticleSystem.AddParticle(a2);
a_ParticleSystem.AddParticle(a3);
a_ParticleSystem.AddParticle(a4);
new CircularWireConstraint(a1, a1.Position + Vector2.down, a_ParticleSystem);
new CircularWireConstraint(a2, a2.Position + Vector2.down, a_ParticleSystem);
new CircularWireConstraint(a3, a3.Position + Vector2.up, a_ParticleSystem);
new CircularWireConstraint(a4, a4.Position + Vector2.up, a_ParticleSystem);
new RodConstraint(a1, a2, a_ParticleSystem);
new RodConstraint(a2, a3, a_ParticleSystem);
new RodConstraint(a3, a4, a_ParticleSystem);
}
public void CreateScenario(ParticleSystem a_ParticleSystem)
{
//Note; Without cross fibers appears to function better
const int dim = 14;
Vector2 bottomLeft = new Vector2(-5f, -5f);
Vector2 topLeft = new Vector2(-5f, 5f);
Vector2 bottomRight = new Vector2(5f, -5f);
Vector2 offsetX = (bottomRight - bottomLeft) / dim;
Vector2 offsetY = (topLeft - bottomLeft) / dim;
float dist = offsetX.x;
for (int i = 0; i <= dim; i++)
{
for (int j = 0; j <= dim; j++)
{
Particle p = new Particle(1f);
p.Position = bottomLeft + offsetX * i + offsetY * j;
a_ParticleSystem.AddParticle(p);
}
}
const float ks = 10f;
const float kd = 1f;
float rest = dist / 1.05f;
for (int i = 0; i < dim; i++)
{
for (int j = 0; j < dim; j++)
{
int cur = j * (dim + 1) + i;
int right = cur + dim + 1;
int below = cur + 1;
a_ParticleSystem.AddForce(new HooksLawSpring(a_ParticleSystem.Particles[cur], a_ParticleSystem.Particles[right], rest, ks, kd));
a_ParticleSystem.AddForce(new HooksLawSpring(a_ParticleSystem.Particles[cur], a_ParticleSystem.Particles[below], rest, ks, kd));
}
}
for (int i = 0; i < dim; i++)
{
int cur1 = (i + 1) * (dim + 1) - 1;
int right = cur1 + dim + 1;
a_ParticleSystem.AddForce(new HooksLawSpring(a_ParticleSystem.Particles[cur1], a_ParticleSystem.Particles[right], rest, ks, kd));
int cur2 = i + dim * (dim + 1);
int below = cur2 + 1;
a_ParticleSystem.AddForce(new HooksLawSpring(a_ParticleSystem.Particles[cur2], a_ParticleSystem.Particles[below], rest, ks, kd));
}
if (m_WithCrossFibers)
{
float drest = rest * Mathf.Sqrt(2f);
for (int i = 0; i < dim; i++)
{
for (int j = 0; j < dim; j++)
{
int cur = j * (dim + 1) + i;
int rightbelow = cur + dim + 2;
a_ParticleSystem.AddForce(new HooksLawSpring(a_ParticleSystem.Particles[cur], a_ParticleSystem.Particles[rightbelow], drest, ks, kd));
}
}
for (int i = 1; i <= dim; i++)
{
for (int j = 0; j < dim; j++)
{
int cur = j * (dim + 1) + i;
int rightabove = cur + dim;
a_ParticleSystem.AddForce(new HooksLawSpring(a_ParticleSystem.Particles[cur], a_ParticleSystem.Particles[rightabove], drest, ks, kd));
}
}
}
a_ParticleSystem.AddForce(new GravityForce(Mathf.Pow(10, -2.5f)));
for (int i = 0; i <= dim; i++)
{
new HLineConstraint(a_ParticleSystem.Particles[i * (dim + 1) + dim], a_ParticleSystem);
}
}
public void CreateScenario(ParticleSystem a_ParticleSystem)
{
Particle particle1 = new Particle(1000f);
particle1.Position = new Vector2(-2f, 0f);
a_ParticleSystem.AddParticle(particle1);
Particle particle2 = new Particle(1f);
particle2.Position = new Vector2(0f, 5f);
a_ParticleSystem.AddParticle(particle2);
Particle particle3 = new Particle(1f);
particle3.Position = new Vector2(4f, 4f);
a_ParticleSystem.AddParticle(particle3);
Force angleforce = new AngularSpringForce(particle2, particle1, particle3, Mathf.PI / 2, 1f, 0.1f);
a_ParticleSystem.AddForce(angleforce);
Force spring1 = new HooksLawSpring(particle1, particle2, 2, 1, .1f);
Force spring2 = new HooksLawSpring(particle3, particle2, 2, 1, .1f);
a_ParticleSystem.AddForce(spring1);
a_ParticleSystem.AddForce(spring2);
Force gravityForce = new GravityForce(.001f);
a_ParticleSystem.AddForce(gravityForce);
Particle p6 = new Particle(.5f);
p6.Position = new Vector2(0, -4);
a_ParticleSystem.AddParticle(p6);
Particle p7 = new Particle(1);
p7.Position = new Vector2(0, -5f);
a_ParticleSystem.AddParticle(p7);
new RodConstraint(p6, p7, a_ParticleSystem);
Particle p5 = new Particle(500f);
p5.Position = new Vector2(2, 2);
a_ParticleSystem.AddParticle(p5);
new CircularWireConstraint(p5, p5.Position + Vector2.right, a_ParticleSystem);
Particle p8 = new Particle(0.5f);
p8.Position = new Vector2(-3, -1);
a_ParticleSystem.AddParticle(p8);
new FixedPointConstraint(p8, a_ParticleSystem);
Particle p9 = new Particle(.5f);
p9.Position = new Vector2(-3, -2);
a_ParticleSystem.AddParticle(p9);
new HLineConstraint(p9, a_ParticleSystem);
Particle p10 = new Particle(.5f);
p10.Position = new Vector2(5, -2);
a_ParticleSystem.AddParticle(p10);
new VLineConstraint(p10, a_ParticleSystem);
Particle q1 = new Particle(.5f);
q1.Position = new Vector2(-3, 3);
a_ParticleSystem.AddParticle(q1);
new EllipticalWireConstraint(q1, q1.Position + new Vector2(1f, -.3f), q1.Position + new Vector2(-1f, -1f), a_ParticleSystem);
Force dragForce = new ViscousDragForce(.2f);
a_ParticleSystem.AddForce(dragForce);
}
