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Added example of tetrahedral (volumetric) softbodies

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Keep camera distance positive when using mouse zoom
Updated autogenerated msvc projectfiles
Added glut 64 bit support
This commit is contained in:
erwin.coumans
2009-08-27 18:39:17 +00:00
parent f82cfc8259
commit f492899499
27 changed files with 429 additions and 3937 deletions
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147
src/BulletSoftBody/btSoftBodyHelpers.cpp
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@@ -310,6 +310,26 @@ void btSoftBodyHelpers::Draw( btSoftBody* psb,
idraw->drawLine(c.m_com,c.m_framexform*btVector3(0,0,10),btVector3(0,0,1));
}
}
/* Tetras */
if(0!=(drawflags&fDrawFlags::Tetras))
{
const btScalar scl=(btScalar)0.8;
const btScalar alp=(btScalar)1;
const btVector3 col((btScalar)0.7,(btScalar)0.7,(btScalar)0.7);
for(int i=0;i<psb->m_tetras.size();++i)
{
const btSoftBody::Tetra& t=psb->m_tetras[i];
if(0==(t.m_material->m_flags&btSoftBody::fMaterial::DebugDraw)) continue;
const btVector3 x[]={t.m_n[0]->m_x,t.m_n[1]->m_x,t.m_n[2]->m_x,t.m_n[3]->m_x};
const btVector3 c=(x[0]+x[1]+x[2]+x[3])/4;
idraw->drawTriangle((x[0]-c)*scl+c,(x[1]-c)*scl+c,(x[2]-c)*scl+c,col,alp);
idraw->drawTriangle((x[0]-c)*scl+c,(x[1]-c)*scl+c,(x[3]-c)*scl+c,col,alp);
idraw->drawTriangle((x[1]-c)*scl+c,(x[2]-c)*scl+c,(x[3]-c)*scl+c,col,alp);
idraw->drawTriangle((x[2]-c)*scl+c,(x[0]-c)*scl+c,(x[3]-c)*scl+c,col,alp);
}
}
/* Notes */
if(0!=(drawflags&fDrawFlags::Notes))
{
@@ -857,3 +877,130 @@ btSoftBody* btSoftBodyHelpers::CreateFromConvexHull(btSoftBodyWorldInfo& worldI
psb->randomizeConstraints();
return(psb);
}
static int nextLine(const char* buffer)
{
int numBytesRead=0;
while (*buffer != '\n')
{
buffer++;
numBytesRead++;
}
if (buffer[0]==0x0a)
{
buffer++;
numBytesRead++;
}
return numBytesRead;
}
/* Create from TetGen .ele, .face, .node data */
btSoftBody* btSoftBodyHelpers::CreateFromTetGenData(btSoftBodyWorldInfo& worldInfo,
const char* ele,
const char* face,
const char* node,
bool bfacelinks,
bool btetralinks,
bool bfacesfromtetras)
{
btAlignedObjectArray<btVector3> pos;
int nnode=0;
int ndims=0;
int nattrb=0;
int hasbounds=0;
int result = sscanf(node,"%d %d %d %d",&nnode,&ndims,&nattrb,&hasbounds);
result = sscanf(node,"%d %d %d %d",&nnode,&ndims,&nattrb,&hasbounds);
node += nextLine(node);
pos.resize(nnode);
for(int i=0;i<pos.size();++i)
{
int index=0;
//int bound=0;
float x,y,z,a;
sscanf(node,"%d %f %f %f",&index,&x,&y,&z);
// sn>>index;
// sn>>x;sn>>y;sn>>z;
node += nextLine(node);
//for(int j=0;j<nattrb;++j)
// sn>>a;
//if(hasbounds)
// sn>>bound;
pos[index].setX(btScalar(x));
pos[index].setY(btScalar(y));
pos[index].setZ(btScalar(z));
}
btSoftBody* psb=new btSoftBody(&worldInfo,nnode,&pos[0],0);
#if 0
if(face&&face[0])
{
int nface=0;
sf>>nface;sf>>hasbounds;
for(int i=0;i<nface;++i)
{
int index=0;
int bound=0;
int ni[3];
sf>>index;
sf>>ni[0];sf>>ni[1];sf>>ni[2];
sf>>bound;
psb->appendFace(ni[0],ni[1],ni[2]);
if(btetralinks)
{
psb->appendLink(ni[0],ni[1],0,true);
psb->appendLink(ni[1],ni[2],0,true);
psb->appendLink(ni[2],ni[0],0,true);
}
}
}
#endif
if(ele&&ele[0])
{
int ntetra=0;
int ncorner=0;
int neattrb=0;
sscanf(ele,"%d %d %d",&ntetra,&ncorner,&neattrb);
ele += nextLine(ele);
//se>>ntetra;se>>ncorner;se>>neattrb;
for(int i=0;i<ntetra;++i)
{
int index=0;
int ni[4],a;
//se>>index;
//se>>ni[0];se>>ni[1];se>>ni[2];se>>ni[3];
sscanf(ele,"%d %d %d %d %d",&index,&ni[0],&ni[1],&ni[2],&ni[3]);
ele+=nextLine(ele);
//for(int j=0;j<neattrb;++j)
// se>>a;
psb->appendTetra(ni[0],ni[1],ni[2],ni[3]);
if(btetralinks)
{
psb->appendLink(ni[0],ni[1],0,true);
psb->appendLink(ni[1],ni[2],0,true);
psb->appendLink(ni[2],ni[0],0,true);
psb->appendLink(ni[0],ni[3],0,true);
psb->appendLink(ni[1],ni[3],0,true);
psb->appendLink(ni[2],ni[3],0,true);
}
}
}
printf("Nodes: %u\r\n",psb->m_nodes.size());
printf("Links: %u\r\n",psb->m_links.size());
printf("Faces: %u\r\n",psb->m_faces.size());
printf("Tetras: %u\r\n",psb->m_tetras.size());
return(psb);
}