void mouse_move(int mouse_x, int mouse_y)
{
using namespace std;
using namespace Eigen;
using namespace igl;
using namespace std;
init_C();
glutSetCursor(GLUT_CURSOR_CROSSHAIR);
// Push scene and object
push_scene();
push_object();
// Unproject mouse at 0 depth and some positive depth
win_s = Vector3f(mouse_x,height-mouse_y,0);
Vector3f win_d(mouse_x,height-mouse_y,1);
unproject(win_s,s);
unproject(win_d,d);
pop_object();
pop_scene();
report_gl_error();
// Shoot ray at unprojected mouse in view direction
dir = d-s;
int num_rays_shot;
ei.intersectRay(s,dir,hits,num_rays_shot);
for(vector<igl::embree::Hit>::iterator hit = hits.begin();
hit != hits.end();
hit++)
{
// Change color of hit faces
C(hit->id,0) = 1;
C(hit->id,1) = 0.4;
C(hit->id,2) = 0.4;
}
}
int main(int argc, char * argv[])
{
using namespace Eigen;
using namespace igl;
using namespace std;
// init mesh
string filename = "../shared/decimated-knight.obj";
if(argc < 2)
{
cerr<<"Usage:"<<endl<<" ./example input.obj"<<endl;
cout<<endl<<"Opening default mesh..."<<endl;
}else
{
// Read and prepare mesh
filename = argv[1];
}
if(!read_triangle_mesh(filename,V,F))
{
return 1;
}
// Compute normals, centroid, colors, bounding box diagonal
per_face_normals(V,F,N);
normalize_row_lengths(N,N);
mean = V.colwise().mean();
C.resize(F.rows(),3);
init_C();
bbd =
(V.colwise().maxCoeff() -
V.colwise().minCoeff()).maxCoeff();
// Init embree
ei.init(V.cast<float>(),F.cast<int>());
// Init glut
glutInit(&argc,argv);
glutInitDisplayString( "rgba depth double samples>=8 ");
glutInitWindowSize(glutGet(GLUT_SCREEN_WIDTH)/2.0,glutGet(GLUT_SCREEN_HEIGHT));
glutCreateWindow("embree");
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutKeyboardFunc(key);
glutMouseFunc(mouse);
glutMotionFunc(mouse_drag);
glutPassiveMotionFunc(mouse_move);
glutMainLoop();
return 0;
}
IGL_INLINE void igl::embree::ambient_occlusion(
const igl::embree::EmbreeIntersector & ei,
const Eigen::PlainObjectBase<DerivedP> & P,
const Eigen::PlainObjectBase<DerivedN> & N,
const int num_samples,
Eigen::PlainObjectBase<DerivedS> & S)
{
using namespace Eigen;
using namespace igl;
const int n = P.rows();
// Resize output
S.resize(n,1);
// Embree seems to be parallel when constructing but not when tracing rays
#pragma omp parallel for
// loop over mesh vertices
for(int p = 0;p<n;p++)
{
const Vector3f origin = P.row(p).template cast<float>();
const Vector3f normal = N.row(p).template cast<float>();
int num_hits = 0;
MatrixXf D = random_dir_stratified(num_samples).cast<float>();
for(int s = 0;s<num_samples;s++)
{
//Vector3d d = random_dir();
Vector3f d = D.row(s);
if(d.dot(normal) < 0)
{
// reverse ray
d *= -1;
}
igl::embree::Hit hit;
const float tnear = 1e-4f;
if(ei.intersectRay(origin,d,hit,tnear))
{
num_hits++;
}
}
S(p) = (double)num_hits/(double)num_samples;
}
}
int main(int argc, char * argv[])
{
using namespace Eigen;
using namespace igl;
using namespace std;
// init mesh
string filename = "../shared/beast.obj";
if(argc < 2)
{
cerr<<"Usage:"<<endl<<" ./example input.obj"<<endl;
cout<<endl<<"Opening default mesh..."<<endl;
}else
{
// Read and prepare mesh
filename = argv[1];
}
// dirname, basename, extension and filename
string d,b,ext,f;
pathinfo(filename,d,b,ext,f);
// Convert extension to lower case
transform(ext.begin(), ext.end(), ext.begin(), ::tolower);
vector<vector<double > > vV,vN,vTC;
vector<vector<int > > vF,vFTC,vFN;
if(ext == "obj")
{
// Convert extension to lower case
if(!igl::readOBJ(filename,vV,vTC,vN,vF,vFTC,vFN))
{
return 1;
}
}else if(ext == "off")
{
// Convert extension to lower case
if(!igl::readOFF(filename,vV,vF,vN))
{
return 1;
}
}else if(ext == "wrl")
{
// Convert extension to lower case
if(!igl::readWRL(filename,vV,vF))
{
return 1;
}
//}else
//{
// // Convert extension to lower case
// MatrixXi T;
// if(!igl::readMESH(filename,V,T,F))
// {
// return 1;
// }
// //if(F.size() > T.size() || F.size() == 0)
// {
// boundary_facets(T,F);
// }
}
if(vV.size() > 0)
{
if(!list_to_matrix(vV,V))
{
return 1;
}
polygon_mesh_to_triangle_mesh(vF,F);
}
// Compute normals, centroid, colors, bounding box diagonal
per_vertex_normals(V,F,N);
mid = 0.5*(V.colwise().maxCoeff() + V.colwise().minCoeff());
bbd = (V.colwise().maxCoeff() - V.colwise().minCoeff()).maxCoeff();
// Init embree
ei.init(V.cast<float>(),F.cast<int>());
// Init glut
glutInit(&argc,argv);
if( !TwInit(TW_OPENGL, NULL) )
{
// A fatal error occured
fprintf(stderr, "AntTweakBar initialization failed: %s\n", TwGetLastError());
return 1;
}
// Create a tweak bar
rebar.TwNewBar("TweakBar");
rebar.TwAddVarRW("scene_rot", TW_TYPE_QUAT4F, &scene_rot, "");
rebar.TwAddVarRW("lights_on", TW_TYPE_BOOLCPP, &lights_on, "key=l");
rebar.TwAddVarRW("color", TW_TYPE_COLOR4F, color.data(), "colormode=hls");
rebar.TwAddVarRW("ao_factor", TW_TYPE_DOUBLE, &ao_factor, "min=0 max=1 step=0.2 keyIncr=] keyDecr=[ ");
rebar.TwAddVarRW("ao_normalize", TW_TYPE_BOOLCPP, &ao_normalize, "key=n");
rebar.TwAddVarRW("ao_on", TW_TYPE_BOOLCPP, &ao_on, "key=a");
rebar.TwAddVarRW("light_intensity", TW_TYPE_DOUBLE, &light_intensity, "min=0 max=0.4 step=0.1 keyIncr=} keyDecr={ ");
rebar.load(REBAR_NAME);
glutInitDisplayString( "rgba depth double samples>=8 ");
glutInitWindowSize(glutGet(GLUT_SCREEN_WIDTH)/2.0,glutGet(GLUT_SCREEN_HEIGHT));
glutCreateWindow("ambient-occlusion");
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutKeyboardFunc(key);
glutMouseFunc(mouse);
glutMotionFunc(mouse_drag);
glutPassiveMotionFunc((GLUTmousemotionfun)TwEventMouseMotionGLUT);
glutMainLoop();
return 0;
}
