/**
@def This function simulate the movement of the cloud mesh, it requires that every point is associated with a Particle data structure
@param MeshModel cloud - Mesh of points
@param Point3f force - Direction of the force
@param float l - Lenght of the movementstep
@param float t - Time Step
@return nothing
*/
void MoveCloudMeshForward(MeshModel *cloud,MeshModel *base,Point3f g,Point3f force,float l,float a,float t,int r_step){
CMeshO::PerVertexAttributeHandle<Particle<CMeshO> > ph = Allocator<CMeshO>::GetPerVertexAttribute<Particle<CMeshO> >(cloud->cm,"ParticleInfo");
CMeshO::VertexIterator vi;
for(vi=cloud->cm.vert.begin();vi!=cloud->cm.vert.end();++vi)
if(!vi->IsD()) MoveParticle(ph[vi],&*vi,l,t,force,g,a);
//Handle falls Particle
ComputeParticlesFallsPosition(base,cloud,g);
//Compute Particles Repulsion
for(int i=0;i<r_step;i++)
ComputeRepulsion(base,cloud,50,l,g,a);
}
/**
This function compute the repulsion beetwen particles
@param MeshModel* b_m - base mesh
@param MeshModel* c_m - cloud of points
@param int k - max number of particle to repulse
@param float l - lenght of the step
@return nothing - adhesion factor
*/
void ComputeRepulsion(MeshModel* b_m,MeshModel *c_m,int k,float l,Point3f g,float a){
CMeshO::PerVertexAttributeHandle<Particle<CMeshO> > ph = Allocator<CMeshO>::GetPerVertexAttribute<Particle<CMeshO> >(c_m->cm,"ParticleInfo");
MetroMeshVertexGrid v_grid;
std::vector< Point3<float> > v_points;
std::vector<CMeshO::VertexPointer> vp;
std::vector<float> distances;
v_grid.Set(c_m->cm.vert.begin(),c_m->cm.vert.end(),b_m->cm.bbox);
CMeshO::VertexIterator vi;
for(vi=c_m->cm.vert.begin();vi!=c_m->cm.vert.end();++vi){
vcg::tri::GetKClosestVertex(c_m->cm,v_grid,k,vi->P(),EPSILON,vp,distances,v_points);
for(unsigned int i=0;i<vp.size();i++){CMeshO::VertexPointer v = vp[i];
if(v->P()!=vi->P() && !v->IsD() && !vi->IsD()){
Ray3<float> ray(vi->P(),fromBarCoords(RandomBaricentric(),ph[vp[i]].face));
ray.Normalize();
Point3f dir=ray.Direction();
dir.Normalize();
MoveParticle(ph[vp[i]],vp[i],0.01,1,dir,g,a);
}
}
}
}