// you need to SetSimulation in Simualtion class's OnAfterDeserialize() callback. this is a hack
//becaue unity serializaiton does not keep references.
public void SetParticles(Simulation sim)
{
this.sim = sim;
particleA = sim.getParticle(indexA);
particleB = sim.getParticle(indexB);
particleM = sim.getParticle(indexM);
}
// you need to SetSimulation in Simualtion class's OnAfterDeserialize() callback. this is a hack
public void SetParticles(Simulation sim)
{
this.sim = sim;
a = sim.getParticle(indexA);
b = sim.getParticle(indexB);
a.PositionOld = a.Position;
b.PositionOld = b.Position;
}
public Spring2D(Simulation sim, int indexA, int indexB, float restLength)
{
this.indexA = indexA;
this.indexB = indexB;
this.sim = sim;
a = sim.getParticle(indexA);
b = sim.getParticle(indexB);
this.restLength2 = restLength * restLength;
on = true;
}
void TraverseBinaryTreeForCircle(BinaryTree branch)
{
if (branch.branchA != null && branch.branchB != null)
{
if (branch.depth < this.minTraverseDepth)
{
TraverseBinaryTreeForCircle(branch.branchA);
TraverseBinaryTreeForCircle(branch.branchB);
}
else
{
searchCount++;
if (branch.boundingCircle.Overlaps(this.targetPos, this.cc.radius))
{
TraverseBinaryTreeForCircle(branch.branchA);
TraverseBinaryTreeForCircle(branch.branchB);
}
}
}
else if (branch.branchA == null && branch.branchB == null)
{
Vector2 dir;
searchCount++;
if (branch.boundingCircle.OverlapsResults(this.targetPos, this.cc.radius, out dir))
{
if (isDebugCollidingOn)
{
branch.boundingCircle.DebugDraw(transform.localToWorldMatrix, branch.depth, Color.magenta);
}
//apply collision
Particle2D pp = sim.getParticle(branch.leafIndex);
pp.Position -= dir * leafForceFeedback;
dir = transform.TransformDirection(dir);
targetRb2D.AddForce(dir * targetForceFeedback, ForceMode2D.Force);
}
}
}
public SimBuffer_Spring(Simulation sim, Vector2[] particleUV, int width, int height)
{
this.sim = sim;
rt = new RenderTexture[sim.maxSpringConvergenceID];
int parNum = sim.numberOfParticles();
ID_SpringParamRT = Shader.PropertyToID("_SpringParamRT");
ID_SpringConstant = Shader.PropertyToID("_SpringConstant");
ID_PositionRT = Shader.PropertyToID("_PositionRT");
//rg = the other end point's uv, b = restlength, a = state
Color[] tempColor = new Color[width * height];
Texture2D tempTex = new Texture2D(width, height, TextureFormat.RGBAFloat, false, false);
for (int i = 0; i < sim.maxSpringConvergenceID; i++)
{
//init rt
rt[i] = new RenderTexture(width, height, 0, RTFormat.ARGB);
rt[i].Create();
//prepare temp color
for (int k = 0; k < width * height; k++)
{
if (k < parNum)
{
Vector2 uv = particleUV[k];
tempColor[k] = new Color(uv.x, uv.y, 1f, (sim.getParticle(k).IsFree) ? 1f : 0f);
}
else
{
tempColor[k] = new Color(0f, 0f, 1f, 0f);
}
}
//get info
for (int j = 0; j < sim.numberOfSprings(); j++)
{
Spring2D sp = sim.getSpring(j);
if (sp.convergenceGroupID == i + 1)
{
int a = sim.getParticleIndex(sp.ParticleA);
int b = sim.getParticleIndex(sp.ParticleB);
tempColor[a].r = particleUV[b].x;
tempColor[a].g = particleUV[b].y;
tempColor[a].b = sp.restLength2;
tempColor[a].a = (sp.ParticleA.IsFree) ? 1f : 0f;
tempColor[b].r = particleUV[a].x;
tempColor[b].g = particleUV[a].y;
tempColor[b].b = sp.restLength2;
tempColor[b].a = (sp.ParticleB.IsFree) ? 1f : 0f;
}
}
//blit
tempTex.SetPixels(tempColor);
tempTex.Apply();
Graphics.Blit(tempTex, rt[i]);
}
Extension.ObjDestroy(tempTex);
//mpb
mpb = new MaterialPropertyBlock[sim.maxSpringConvergenceID];
for (int i = 0; i < sim.maxSpringConvergenceID; i++)
{
mpb[i] = new MaterialPropertyBlock();
mpb[i].SetTexture(ID_SpringParamRT, rt[i]);
mpb[i].SetFloat(ID_SpringConstant, sim.Settings.springConstant);
}
//tempRT
tempRT = new RenderTexture[sim.maxSpringConvergenceID - 1];
}