private void ComputeDensityPressure()
{
for (int i = 0; i < particles.Length; i++)
{
hash.Insert(particles[i].position, particles[i]);
particles[i].density = 0.0f;
//currentParticleBin = hash.GetBin(particles[i].position);
// listNeighbours = hash.GetNeighbourBinsFromPosition(particles[i].position);
neighbourParticles = hash.GetParticlesFromBins(hash.GetNeighbourBinsFromPosition(particles[i].position));
//Debug.Log(neighbourParticles.Count);
//look at neighbours
for (int j = 0; j < neighbourParticles.Count; j++)
{
Vector3 dist = neighbourParticles[j].position - particles[i].position;
float r2 = dist.sqrMagnitude;
if (r2 < parameters[0].smoothingRadiusSq)
{
particles[i].density += parameters[0].particleMass *
(315.0f / (64.0f * Mathf.PI * Mathf.Pow(parameters[0].smoothingRadius, 9.0f))) *
Mathf.Pow(parameters[0].smoothingRadiusSq - r2, 3.0f);
}
}
particles[i].pressure = GAS_CONST * (particles[i].density - parameters[0].restDensity);
}
}
void Start()
{
hash = new SpatialHash<Transform>(cellSize);
clones = new Transform[numberOfPoints];
wireSize = Mathf.CeilToInt(sphereRadius / cellSize) * cellSize + cellSize / 2;
for (var i = 0; i < numberOfPoints; i++)
{
clone = Instantiate(point, Random.insideUnitSphere * sphereRadius, Quaternion.identity) as Transform;
if (clone != null)
{
hash.Insert(clone.position, clone);
clone.parent = transform;
clones[i] = clone;
}
}
InvokeRepeating("MovePoint", 0, 0.5f);
InvokeRepeating("ClearHash", 10, 10);
for (var x = -wireSize; x <= wireSize; x++)
{
for (var y = -wireSize; y <= wireSize; y++)
{
for (var z = -wireSize; z <= wireSize; z++)
{
yellowCubes.Add(Instantiate(yellowCube, new Vector3(x, y, z), Quaternion.identity) as Transform);
blueCubes.Add(Instantiate(blueCube, new Vector3(x, y, z), Quaternion.identity) as Transform);
}
}
}
}
public void Clear()
{
var spatialHash = new SpatialHash <int>(16);
var rectA = new Rectangle(-2, -2, 2, 2);
var rectATransform = new Transform2D(new Vector2(-8, -8));
var rectB = new Rectangle(-2, -2, 2, 2);
var rectBTransform = new Transform2D(new Vector2(8, 8));
spatialHash.Insert(0, rectA, rectATransform);
spatialHash.Insert(1, rectB, rectBTransform);
spatialHash.Clear();
spatialHash.Retrieve(0, rectA, rectATransform).Should().HaveCount(0);
}
public void InsertAndRetrieveSameValues()
{
var spatialHash = new SpatialHash <int>(16);
var rectA = new Rectangle(-2, -2, 2, 2);
var rectATransform = new Transform2D(new Vector2(-8, -8));
var rectB = new Rectangle(-2, -2, 2, 2);
var rectBTransform = new Transform2D(new Vector2(-8, -8));
var rectC = new Rectangle(-1, -1, 1, 1);
var rectCTransform = new Transform2D(new Vector2(-8, -8));
spatialHash.Insert(0, rectA, rectATransform);
spatialHash.Insert(1, rectB, rectBTransform);
spatialHash.Insert(2, rectC, rectCTransform);
spatialHash.Retrieve(2, rectC, rectCTransform).Should().HaveCount(2);
}
void Start()
{
spatialHash = new SpatialHash(2);
vertices = GetComponentsInChildren <vertex> ();
for (int i = 0; i < vertices.Length; i++)
{
spatialHash.Insert(vertices[i].transform.position, vertices[i]);
}
triangles = new List <vertex>();
constraints = new List <Constraint>();
GenerateConstraints();
}
public void InsertAndRetrieve()
{
var spatialHash = new SpatialHash <int>(16);
var rectA = new Rectangle(-2, -2, 2, 2);
var rectATransform = new Transform2D(new Vector2(-8, -8));
var rectB = new Rectangle(-2, -2, 2, 2);
var rectBTransform = new Transform2D(new Vector2(8, 8));
var rectC = new Rectangle(-2, -2, 2, 2);
var rectCTransform = new Transform2D(new Vector2(24, -4));
var rectD = new Rectangle(-2, -2, 2, 2);
var rectDTransform = new Transform2D(new Vector2(24, 24));
var circleA = new Circle(2);
var circleATransform = new Transform2D(new Vector2(24, -8));
var circleB = new Circle(8);
var circleBTransform = new Transform2D(new Vector2(16, 16));
var line = new Line(new Position2D(20, -4), new Position2D(22, -12));
var lineTransform = new Transform2D(new Vector2(0, 0));
var point = new Point();
var pointTransform = new Transform2D(new Position2D(8, 8));
spatialHash.Insert(0, rectA, rectATransform);
spatialHash.Insert(1, rectB, rectBTransform);
spatialHash.Insert(2, rectC, rectCTransform);
spatialHash.Insert(3, rectD, rectDTransform);
spatialHash.Insert(4, circleA, circleATransform);
spatialHash.Insert(1, circleB, circleBTransform);
spatialHash.Insert(6, line, lineTransform);
spatialHash.Insert(7, point, pointTransform);
spatialHash.Retrieve(0, rectA, rectATransform).Should().BeEmpty();
spatialHash.Retrieve(1, rectB, rectBTransform).Should().NotContain((1, circleB, circleBTransform));
spatialHash.Retrieve(1, rectB, rectBTransform).Should().Contain((7, point, pointTransform));
spatialHash.Retrieve(2, rectC, rectCTransform).Should().Contain((6, line, lineTransform)).And.Contain((4, circleA, circleATransform));
spatialHash.Retrieve(3, rectD, rectDTransform).Should().Contain((1, circleB, circleBTransform));
spatialHash.Retrieve(4, circleA, circleATransform).Should().Contain((6, line, lineTransform)).And.Contain((2, rectC, rectCTransform));
spatialHash.Retrieve(1, circleB, circleBTransform).Should().NotContain((1, rectB, rectBTransform)).And.Contain((3, rectD, rectDTransform));
spatialHash.Retrieve(6, line, lineTransform).Should().Contain((4, circleA, circleATransform)).And.Contain((2, rectC, rectCTransform));
}
private void InitSPH()
{
particles = new SPHParticle[amount];
hash = new SpatialHash <SPHParticle>(cellSize);
for (int i = 0; i < amount; i++)
{
float jitter = (Random.value * 2f - 1f) * parameters[parameterID].particleRadius * 0.1f;
float x = worldStartOffsetX + (i % rowSize) + Random.Range(-0.1f, 0.1f);
float y = 2 + (float)((i / rowSize) / rowSize) * 1.1f;
float z = worldStartOffsetY + ((i / rowSize) % rowSize) + Random.Range(-0.1f, 0.1f);
GameObject go = Instantiate(Prefab);
go.transform.localScale = Vector3.one * parameters[parameterID].particleRadius;
go.transform.position = new Vector3(x + jitter, y, z + jitter);
go.name = "Particle" + i.ToString();
particles[i].Init(new Vector3(x, y, z), parameterID, go);
particles[i].velocity = Vector3.zero;
hash.Insert(particles[i].position, particles[i]);
}
}