public AngleConstraint2D makeAngleConstraint(Spring2D s1, Spring2D s2)
{
AngleConstraint2D angle = new AngleConstraint2D(this, s1, s2);
angles.Add(angle);
return(angle);
}
void applyConstraints()
{
//gravity
if (setting.gravity != Vector2.zero)
{
for (int i = 0; i < sim.numberOfParticles(); ++i)
{
p = sim.getParticle(i);
if (p.IsFree)
{
p.Position += setting.gravity;
}
}
}
//iterations
for (int iter = 0; iter < setting.iteration; iter++)
{
if (setting.applyString)
{
for (int p = 1; p <= sim.maxSpringConvergenceID; p++)
{
for (int i = 0; i < sim.numberOfSprings(); i++)
{
Spring2D sp = sim.getSpring(i);
if (sp.convergenceGroupID == p)
{
sp.apply();
}
}
}
}
if (setting.applyAngle)
{
for (int p = 1; p <= sim.maxAngleConvergenceID; p++)
{
for (int i = 0; i < sim.numberOfAngleConstraints(); i++)
{
AngleConstraint2D ag = sim.getAngleConstraint(i);
if (ag.convergenceGroupID == p)
{
ag.GetDelta();
}
}
for (int i = 0; i < sim.numberOfAngleConstraints(); i++)
{
AngleConstraint2D ag = sim.getAngleConstraint(i);
if (ag.convergenceGroupID == p)
{
ag.apply();
}
}
}
}
}
}
public void removeAngleConstraint(AngleConstraint2D a)
{
angles.Remove(a);
}
/// <summary>
/// Calculates the convergence ID of the springs and angles that are connected to particle specified by particleIndex
/// </summary>
/// <param name="particleIndex">Particle index.</param>
private void CalcConvergenceID(int particleIndex)
{
Particle2D pp = this.getParticle(particleIndex);
//Spring
List <Spring2D> sp = new List <Spring2D> (10); //the conencted spring for particle index
int springNum = this.numberOfSprings();
//get the connected spring
for (int i = 0; i < springNum; i++)
{
Spring2D s = this.getSpring(i);
Particle2D a = s.ParticleA;
Particle2D b = s.ParticleB;
if (a == pp || b == pp)
{
sp.Add(s);
}
}
//calc the convergence id for the springs which connects to this particle
List <int> IDinUse = new List <int> (10);
for (int i = 0; i < sp.Count; i++)
{
if (sp[i].convergenceGroupID != 0)
{
IDinUse.Add(sp[i].convergenceGroupID);
}
}
for (int i = 0; i < sp.Count; i++)
{
if (sp[i].convergenceGroupID == 0)
{
int id = 1;
while (IDinUse.Contains(id))
{
id++;
}
sp[i].convergenceGroupID = id;
IDinUse.Add(id);
if (id > this.maxSpringConvergenceID)
{
this.maxSpringConvergenceID = id;
}
}
}
//angle
List <AngleConstraint2D> ag = new List <AngleConstraint2D> (10);
int angleNum = this.numberOfAngleConstraints();
//get the connected angles
for (int i = 0; i < angleNum; i++)
{
AngleConstraint2D angle = this.getAngleConstraint(i);
Particle2D b = angle.ParticleB;
Particle2D m = angle.ParticleM;
if (b == pp || m == pp)
{
ag.Add(angle);
}
}
//recalc the convergence id for the angles that are connected to this particle
IDinUse.Clear();
for (int i = 0; i < ag.Count; i++)
{
if (ag[i].convergenceGroupID != 0)
{
IDinUse.Add(ag[i].convergenceGroupID);
}
}
for (int i = 0; i < ag.Count; i++)
{
if (ag[i].convergenceGroupID == 0)
{
int id = 1;
while (IDinUse.Contains(id))
{
id++;
}
ag[i].convergenceGroupID = id;
IDinUse.Add(id);
if (id > this.maxAngleConvergenceID)
{
this.maxAngleConvergenceID = id;
}
}
}
}
public SimBuffer_Angle(Simulation sim, Vector2[] particleUV, int width, int height)
{
this.sim = sim;
int angleNum = sim.numberOfAngleConstraints();
int parNum = sim.numberOfParticles();
//angle uv
float usage = 0f;
if (!SimBuffer.GetTexDimension(angleNum, out deltaRTWidth, out deltaRTHeight, out usage))
{
Debug.LogError("Cannot create SimBuffer Angle deltaw rt with wrong dimesnion!");
return;
}
angleUV = new Vector2[angleNum];
int count = 0;
float halfW = 0.5f / deltaRTWidth;
float halfH = 0.5f / deltaRTHeight;
for (int y = 0; y < deltaRTHeight; y++)
{
for (int x = 0; x < deltaRTWidth; x++)
{
if (count < angleNum)
{
angleUV[count] = new Vector2((float)x / (float)deltaRTWidth + halfW, (float)y / (float)deltaRTHeight + halfH);
}
count++;
}
}
tempRT = new RenderTexture[sim.maxAngleConvergenceID - 1];
tempDeltaRT = new RenderTexture[sim.maxAngleConvergenceID];
paramRT = new RenderTexture[sim.maxAngleConvergenceID];
deltaMesh = new Mesh[sim.maxAngleConvergenceID];
ID_AngleParamRT = Shader.PropertyToID("_AngleParamRT");
ID_AngleConstant = Shader.PropertyToID("_AngleConstant");
ID_PositionRT = Shader.PropertyToID("_PositionRT");
ID_AngleDeltaRT = Shader.PropertyToID("_AngleDeltaRT");
//rg = the other end point's uv, ba = uv in the delta rt
Color[] paramRTColor = new Color[width * height];
Texture2D tempTex = new Texture2D(width, height, TextureFormat.RGBAFloat, false, false);
for (int i = 0; i < sim.maxAngleConvergenceID; i++)
{
//delta mesh
int agbyid = sim.numberOfAnglesByConvID(i + 1);
deltaMesh[i] = SimBuffer.PointMesh(agbyid);
List <Vector3> vtc = new List <Vector3> (agbyid); //xy = a uv,y=fixedangle
List <Color> cl = new List <Color> (agbyid); //rg=b uv,ba = m uv;
List <Vector2> uv = new List <Vector2> (agbyid); //delta rt uv;
//init rt
paramRT[i] = new RenderTexture(width, height, 0, RTFormat.ARGB);
paramRT[i].Create();
//prepare temp color
for (int k = 0; k < width * height; k++)
{
if (k < parNum)
{
Vector2 puv = particleUV[k];
paramRTColor[k] = new Color(puv.x, puv.y, 0f, 0f); //rg = other end,ba = uv in deltart
}
else
{
paramRTColor[k] = Color.clear;
}
}
//get info
for (int j = 0; j < angleNum; j++)
{
AngleConstraint2D ag = sim.getAngleConstraint(j);
if (ag.convergenceGroupID == i + 1)
{
int a = sim.getParticleIndex(ag.ParticleB);
int b = sim.getParticleIndex(ag.ParticleM);
int aIndex = sim.getParticleIndex(ag.ParticleA);
//if it's free, rg = the other end's uv, else = own uv
if (ag.ParticleB.IsFree)
{
paramRTColor[a].r = particleUV[b].x;
paramRTColor[a].g = particleUV[b].y;
}
if (ag.ParticleM.IsFree)
{
paramRTColor[b].r = particleUV[a].x;
paramRTColor[b].g = particleUV[a].y;
}
paramRTColor[a].b = paramRTColor[b].b = angleUV[j].x;
paramRTColor[a].a = paramRTColor[b].a = angleUV[j].y;
//mesh vtc and cl
vtc.Add(new Vector3(angleUV[j].x, angleUV[j].y, ag.angle_Fixed));
uv.Add(particleUV[aIndex]);
cl.Add(new Color(particleUV[a].x, particleUV[a].y, particleUV[b].x, particleUV[b].y));
}
}
//blit
tempTex.SetPixels(paramRTColor);
tempTex.Apply();
Graphics.Blit(tempTex, paramRT[i]);
//delta mesh
deltaMesh[i].vertices = vtc.ToArray();
deltaMesh[i].colors = cl.ToArray();
deltaMesh[i].uv = uv.ToArray();
//deltaMesh[i].UploadMeshData(true);
}
Extension.ObjDestroy(tempTex);
//mpb
mpb = new MaterialPropertyBlock[sim.maxSpringConvergenceID];
for (int i = 0; i < sim.maxAngleConvergenceID; i++)
{
mpb[i] = new MaterialPropertyBlock();
mpb[i].SetTexture(ID_AngleParamRT, paramRT[i]);
mpb[i].SetFloat(ID_AngleConstant, sim.Settings.angleConstant);
}
}
