void setupParticleSystem(Autodesk.Revit.DB.Face f, int uDiv, int vDiv, double springDampening, double springRestLength, double springConstant, double mass)
{
BoundingBoxUV bbox = f.GetBoundingBox();
double uStep = (bbox.Max.U - bbox.Min.U) / uDiv;
double vStep = (bbox.Max.V - bbox.Min.V) / vDiv;
for (int j = 0; j <= uDiv; j++) // Y axis is outer loop
{
double u = bbox.Min.U + uStep * j;
for (int i = 0; i <= vDiv; i++) // X axis is inner loop
{
double v = bbox.Min.V + vStep * i;
Particle a = ParticleSystem.makeParticle(mass, f.Evaluate(new UV(u, v)), false);
if (i > 0)
{
ParticleSystem.makeSpring(ParticleSystem.getParticle((i - 1) + (j * (vDiv + 1))), a, springRestLength, springConstant, springDampening);
}
if (j > 0)
{
Particle b = ParticleSystem.getParticle(i + ((j - 1) * (vDiv + 1)));
ParticleSystem.makeSpring(a, b, springRestLength, springConstant, springDampening);
}
if (i == 0 || i == vDiv || j == 0 || j == uDiv)
{
a.makeFixed();
}
}
}
}
void CreateChainWithTwoFixedEnds(ReferencePoint pt1, ReferencePoint pt2, int numX, double springDampening, double springRestLength, double springConstant, double mass)
{
Particle p;
Particle p2;
XYZ partXYZ1 = pt1.Position;
XYZ partXYZ2 = pt2.Position;
XYZ lineVec = partXYZ2 - partXYZ1;
double stepSize = lineVec.GetLength() / numX;
for (int j = 0; j < numX; j++)//step along curve and evaluate at each step, making sure to thread in the existing fixed parts
{
//double curveParam = 0;
XYZ pointOnLine;
if (j == 0) // starting point
{
p = ParticleSystem.makeParticle(mass, partXYZ1, true); // make first particle fixed
}
else if (j > 0 && j < numX - 1) // middle points
{
pointOnLine = partXYZ1 + lineVec.Normalize() * (j * stepSize);
p = ParticleSystem.makeParticle(mass, pointOnLine, false); // make a new particle along curve at j-th point on line
p2 = ParticleSystem.getParticle(j - 1);
ParticleSystem.makeSpring(p, p2, springRestLength, springConstant, springDampening); //make a new spring and connect it to the last-made point
}
else //last point - fixed
{
p = ParticleSystem.getParticle(j - 1);
p2 = ParticleSystem.makeParticle(mass, partXYZ2, true); // make last particle fixed
ParticleSystem.makeSpring(p, p2, springRestLength, springConstant, springDampening); //make a new spring and connect the j-th point to the fixed point
}
}
}
void CreateChainWithOneFixedEnd(ReferencePoint pt1, int numX, double springDampening, double springRestLength, double springConstant, double mass)
{
Particle p;
XYZ partXYZ1 = pt1.Position;
Particle fixedPart1 = ParticleSystem.makeParticleFromElementID(pt1.Id, mass, pt1.Position, true); // true means 'make fixed'
XYZ partXYZ2 = partXYZ1 + new XYZ(10, 0, 0);
//Line tempLine = this.UIDocument.Application.Application.Create.NewLineBound(partXYZ1, partXYZ2);
XYZ vector = partXYZ2 - partXYZ1;
XYZ step = vector.Divide(numX);
for (int j = 0; j < numX; j++)//step along curve and evaluate at each step, making sure to thread in the existing fixed parts
{
//double curveParam = 0;
XYZ pointOnLine;
pointOnLine = partXYZ1 + step.Multiply(j);
if (j == 0) // starting point
{
//curveParam = (double)j / numX;
//pointOnLine = tempLine.Evaluate(curveParam, true);
p = ParticleSystem.makeParticle(mass, pointOnLine, true); // make first particle fixed
}
else // middle points
{
//curveParam = (double)j / numX;
//pointOnLine = tempLine.Evaluate(curveParam, true);
p = ParticleSystem.makeParticle(mass, pointOnLine, false); // make a new particle along curve at j-th point on line
ParticleSystem.makeSpring(ParticleSystem.getParticle((j - 1)), p, springRestLength, springConstant, springDampening); //make a new spring and connect it to the last-made point
}
}
}
private void CreateSpringsFromCurves(IEnumerable <Value> curves, IEnumerable <Value> points)
{
//create all the fixed points first
foreach (var pt in points)
{
var xyz = (XYZ)((Value.Container)pt).Item;
ParticleSystem.makeParticle(_m, xyz, true);
}
//create all the springs, checking for existing particles
foreach (var crv in curves)
{
var curve = (Curve)((Value.Container)crv).Item;
XYZ start = curve.get_EndPoint(0);
XYZ end = curve.get_EndPoint(1);
//find an existing particle to use
Particle a = ParticleSystem.getParticleByXYZ(start);
Particle b = ParticleSystem.getParticleByXYZ(end);
//if not, create a particle
if (a == null)
{
a = ParticleSystem.makeParticle(_m, start, false);
}
if (b == null)
{
b = ParticleSystem.makeParticle(_m, end, false);
}
if (_useRl)
{
ParticleSystem.makeSpring(a, b, _r, _s, _d);
}
else
{
double restLength = start.DistanceTo(end) * _rlf;
ParticleSystem.makeSpring(a, b, restLength, _s, _d);
}
}
}
private void CreateSpringsFromCurves(IEnumerable <Curve> curves, IEnumerable <XYZ> points)
{
//create all the fixed points first
foreach (var pt in points)
{
ParticleSystem.makeParticle(m, pt, true);
}
//create all the springs, checking for existing particles
foreach (var curve in curves)
{
XYZ start = curve.get_EndPoint(0);
XYZ end = curve.get_EndPoint(1);
//find an existing particle to use
Particle a = ParticleSystem.getParticleByXYZ(start);
Particle b = ParticleSystem.getParticleByXYZ(end);
//if not, create a particle
if (a == null)
{
a = ParticleSystem.makeParticle(m, start, false);
}
if (b == null)
{
b = ParticleSystem.makeParticle(m, end, false);
}
if (useRl)
{
ParticleSystem.makeSpring(a, b, r, s, d);
}
else
{
double restLength = start.DistanceTo(end) * rlf;
ParticleSystem.makeSpring(a, b, restLength, s, d);
}
}
}
void setupLineTest(int maxPartX, int maxPartY, double springDampening, double springRestLength, double springConstant, double mass)
{
XYZ partXYZ;
double stepSize = 20;
for (int j = 0; j < maxPartY; j++) // Y axis is outer loop
{
for (int i = 0; i < maxPartX; i++) // X axis is inner loop
{
if (i == 0)
{
partXYZ = new XYZ(0, j * stepSize, 0);
Particle a = ParticleSystem.makeParticle(mass, partXYZ, true);
}
else
{
partXYZ = new XYZ(i * stepSize, j * stepSize, 0);
Particle b = ParticleSystem.makeParticle(mass, partXYZ, false);
ParticleSystem.makeSpring(ParticleSystem.getParticle((i - 1) + (j * maxPartX)), b, springRestLength, springConstant, springDampening);
}
if (i == maxPartX - 1)
{
ParticleSystem.getParticle(i + (j * maxPartX)).makeFixed();
}
}
if (j > 0) // thread multple chains together along Y axis
{
for (int i = 0; i < maxPartX; i++)
{
Particle a = ParticleSystem.getParticle(i + (j * maxPartX));
Particle b = ParticleSystem.getParticle(i + ((j - 1) * maxPartX));
ParticleSystem.makeSpring(a, b, springRestLength, springConstant, springDampening);
}
}
}
}
