Composite MakeClothComposite(float rowSize, int row, float colSize, int col, float particleDamping, float springStiffness, Vector2 gravity, Vector2 rootPosition, Vector2 offset)
{
float rowCellSize = rowSize / row;
float colCellSize = colSize / col;
Particle[] rowParticles = new Particle[row];
var composite = new Composite();
List <int> particleIndices = new List <int>();
List <int> springIndices = new List <int>();
for (var y = 0; y < col; ++y)
{
if (y == 0)
{
for (var x = 0; x < row; ++x)
{
var p = new Particle(rootPosition + new Vector2(rowCellSize * x, -colCellSize * y) + offset, particleDamping);
particleIndices.Add(composite.elemNum);
composite.AddSimElement(p, 0);
var pc = new PinConstraint(p);
composite.AddSimElement(p, 10);
if (x != 0)
{
var s = new SpringConstraint(rowParticles[x - 1], p, springStiffness);
// var s = new DistanceConstraint(rowParticles[x - 1], p);
springIndices.Add(composite.elemNum);
composite.AddSimElement(s, 1);
}
rowParticles[x] = p;
}
}
else
{
for (var x = 0; x < row; ++x)
{
var p = new Particle(rootPosition + new Vector2(rowCellSize * x, -colCellSize * y) + offset, particleDamping);
particleIndices.Add(composite.elemNum);
composite.AddSimElement(p, 0);
var cfc = new ConstantForceConstraint(p, gravity);
composite.AddSimElement(cfc, 5);
var s = new SpringConstraint(rowParticles[x], p, springStiffness);
// var s = new DistanceConstraint(rowParticles[x], p);
springIndices.Add(composite.elemNum);
composite.AddSimElement(s, 1);
if (x != 0)
{
s = new SpringConstraint(rowParticles[x - 1], p, springStiffness);
// s = new DistanceConstraint(rowParticles[x - 1], p);
springIndices.Add(composite.elemNum);
composite.AddSimElement(s, 1);
}
rowParticles[x] = p;
}
}
}
composite.AddRenderingGroup(new SimRenderer.SimRenderingGroup(1, springIndices));
composite.AddRenderingGroup(new SimRenderer.SimRenderingGroup(0, particleIndices));
return(composite);
}
