int main(int argc, char *argv[])
{
using namespace Eigen;
using namespace std;
cout<<"Usage:"<<endl;
cout<<"[space] toggle showing surface."<<endl;
cout<<"'.'/',' push back/pull forward slicing plane."<<endl;
cout<<endl;
// Load mesh: (V,T) tet-mesh of convex hull, F contains original surface
// triangles
igl::readMESH("../shared/bunny.mesh",V,T,F);
// Encapsulated call to point_mesh_squared_distance to determine bounds
{
VectorXd sqrD;
VectorXi I;
MatrixXd C;
igl::point_mesh_squared_distance(V,V,F,sqrD,I,C);
max_distance = sqrt(sqrD.maxCoeff());
}
// Precompute signed distance AABB tree
tree.init(V,F);
// Precompute vertex,edge and face normals
igl::per_face_normals(V,F,FN);
igl::per_vertex_normals(
V,F,igl::PER_VERTEX_NORMALS_WEIGHTING_TYPE_ANGLE,FN,VN);
igl::per_edge_normals(
V,F,igl::PER_EDGE_NORMALS_WEIGHTING_TYPE_UNIFORM,FN,EN,E,EMAP);
// Plot the generated mesh
igl::viewer::Viewer viewer;
update_visualization(viewer);
viewer.callback_key_down = &key_down;
viewer.core.show_lines = false;
viewer.launch();
}
void mexFunction(
int nlhs, mxArray *plhs[],
int nrhs, const mxArray *prhs[])
{
using namespace std;
using namespace Eigen;
using namespace igl;
using namespace igl::matlab;
igl::matlab::MexStream mout;
std::streambuf *outbuf = cout.rdbuf(&mout);
//mexPrintf("Compiled at %s on %s\n",__TIME__,__DATE__);
MatrixXd P,V,C,N;
MatrixXi F;
VectorXi I;
VectorXd S;
SignedDistanceType type;
parse_rhs(nrhs,prhs,P,V,F,type);
if(F.rows() > 0)
{
switch(V.cols())
{
case 2:
{
// Persistent data not supported for 2D
signed_distance(P,V,F,type,S,I,C,N);
break;
}
case 3:
{
if(g_sign_type != type || g_V != V || g_F != F)
{
g_V = V;
g_F = F;
g_sign_type = type;
// Clear the tree
g_tree.deinit();
// Prepare distance computation
g_tree.init(V,F);
switch(type)
{
default:
assert(false && "Unknown SignedDistanceType");
case SIGNED_DISTANCE_TYPE_DEFAULT:
case SIGNED_DISTANCE_TYPE_WINDING_NUMBER:
g_hier.set_mesh(V,F);
g_hier.grow();
break;
case SIGNED_DISTANCE_TYPE_PSEUDONORMAL:
// "Signed Distance Computation Using the Angle Weighted Pseudonormal"
// [Bærentzen & Aanæs 2005]
per_face_normals(V,F,g_FN);
per_vertex_normals(V,F,PER_VERTEX_NORMALS_WEIGHTING_TYPE_ANGLE,
g_FN,g_VN);
per_edge_normals(
V,F,PER_EDGE_NORMALS_WEIGHTING_TYPE_UNIFORM,
g_FN,g_EN,g_E,g_EMAP);
break;
}
}
N.resize(P.rows(),3);
S.resize(P.rows(),1);
I.resize(P.rows(),1);
C.resize(P.rows(),3);
//for(int p = 0;p<P.rows();p++)
igl::parallel_for(P.rows(),[&](const int p)
{
const Eigen::RowVector3d q(P(p,0),P(p,1),P(p,2));
double s,sqrd;
Eigen::RowVector3d c;
int i;
switch(type)
{
default:
assert(false && "Unknown SignedDistanceType");
case SIGNED_DISTANCE_TYPE_DEFAULT:
case SIGNED_DISTANCE_TYPE_WINDING_NUMBER:
signed_distance_winding_number(
g_tree,g_V,g_F,g_hier,q,s,sqrd,i,c);
break;
case SIGNED_DISTANCE_TYPE_PSEUDONORMAL:
{
RowVector3d n(0,0,0);
signed_distance_pseudonormal(
g_tree,g_V,g_F,g_FN,g_VN,g_EN,g_EMAP,
q,s,sqrd,i,c,n);
N.row(p) = n;
break;
}
}
I(p) = i;
S(p) = s*sqrt(sqrd);
C.row(p) = c;
},10000);
break;
}
}
}
switch(nlhs)
{
default:
{
mexErrMsgTxt(false,"Too many output parameters.");
}
case 4:
{
prepare_lhs_double(N,plhs+3);
// Fall through
}
case 3:
{
prepare_lhs_double(C,plhs+2);
// Fall through
}
case 2:
{
prepare_lhs_index(I,plhs+1);
// Fall through
}
case 1:
{
prepare_lhs_double(S,plhs+0);
// Fall through
}
case 0: break;
}
// Restore the std stream buffer Important!
std::cout.rdbuf(outbuf);
}