Alec Jacobson
01f2dc0a60
* add test case * add coplanarity test * another failing test * use orient3d * no printing * reverting... That introduced lots of other failure cases * subdivided knight case * wip predicates * promising predicates version * tri_tri_overlap compiles, header guards, predicate find_* * tests for predicates::find_in... * parallel for * note * mv to predicates * remove old functions * tutorials; extracting segments is broken 904 * fix extraction bug * missing header * capture consts
117 lines
2.7 KiB
C++
117 lines
2.7 KiB
C++
#include <igl/read_triangle_mesh.h>
|
|
#include <igl/AABB.h>
|
|
#include <igl/unique.h>
|
|
|
|
#include <igl/opengl/glfw/Viewer.h>
|
|
|
|
#include <igl/predicates/find_intersections.h>
|
|
|
|
Eigen::MatrixXd V1,V2;
|
|
Eigen::MatrixXi F1,F2;
|
|
int mid_1, mid_2;
|
|
|
|
igl::AABB<Eigen::MatrixXd,3> tree;
|
|
|
|
double min_z,max_z;
|
|
double slice_z;
|
|
|
|
|
|
void update_visualization(igl::opengl::glfw::Viewer & viewer)
|
|
{
|
|
//shifted intersection object
|
|
Eigen::MatrixXd V2_(V2.rows(),V2.cols());
|
|
V2_<< V2.col(0), V2.col(1), V2.col(2).array()+slice_z;
|
|
viewer.data_list[mid_2].set_vertices(V2_);
|
|
|
|
Eigen::MatrixXi IF,EE;
|
|
Eigen::MatrixXd EV;
|
|
Eigen::VectorXi EI;
|
|
Eigen::Array<bool,Eigen::Dynamic,1> CP;
|
|
igl::predicates::find_intersections(tree, V1,F1, V2_,F2,IF,CP,EV,EE,EI);
|
|
|
|
// Plot the edges of the intersects
|
|
viewer.data_list[mid_1].set_edges( EV,EE, Eigen::RowVector3d(1,1,1));
|
|
|
|
// show faces which are intersected
|
|
Eigen::VectorXi I;
|
|
igl::unique(IF.col(0).eval(),I);
|
|
Eigen::VectorXd D = Eigen::MatrixXd::Zero(F1.rows(),1);
|
|
D(I).setConstant(1.0);
|
|
viewer.data_list[mid_1].set_data(D,0,1,igl::COLOR_MAP_TYPE_PARULA);
|
|
|
|
igl::unique(IF.col(1).eval(),I);
|
|
D = Eigen::MatrixXd::Zero(F2.rows(),1);
|
|
D(I).setConstant(1.0);
|
|
viewer.data_list[mid_2].set_data(D,0,1,igl::COLOR_MAP_TYPE_JET);
|
|
|
|
}
|
|
|
|
|
|
bool key_down(igl::opengl::glfw::Viewer& viewer, unsigned char key, int mod)
|
|
{
|
|
switch(key)
|
|
{
|
|
default:
|
|
return false;
|
|
case '.':
|
|
slice_z = std::min(slice_z+0.01,max_z);
|
|
break;
|
|
case ',':
|
|
slice_z = std::max(slice_z-0.01,min_z);
|
|
break;
|
|
}
|
|
update_visualization(viewer);
|
|
return true;
|
|
}
|
|
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
// Load two meshes
|
|
igl::read_triangle_mesh(
|
|
argc<=1?TUTORIAL_SHARED_PATH "/cow.off" :argv[1],V1,F1);
|
|
igl::read_triangle_mesh(
|
|
argc<=2?TUTORIAL_SHARED_PATH "/planexy.off":argv[2],V2,F2);
|
|
|
|
// initialize AABB tree with first mesh (it doesn't move)
|
|
tree.init(V1,F1);
|
|
|
|
std::cout<<"Usage:"<<std::endl;
|
|
std::cout<<"'.'/',' push back/pull forward slicing plane."<<std::endl;
|
|
std::cout<<std::endl;
|
|
|
|
if(argc<=2)
|
|
{
|
|
min_z=V1.col(2).minCoeff();
|
|
max_z=V1.col(2).maxCoeff();
|
|
slice_z=(max_z+min_z)/2;
|
|
}else
|
|
{
|
|
slice_z = 0;
|
|
}
|
|
|
|
//center slicing object
|
|
V2.col(2).array() -= V2.col(2).array().mean();
|
|
|
|
// Plot the mesh
|
|
igl::opengl::glfw::Viewer viewer;
|
|
viewer.data().set_mesh(V2, F2);
|
|
viewer.data().set_face_based(true);
|
|
mid_2 = viewer.selected_data_index;
|
|
viewer.append_mesh();
|
|
viewer.data().set_mesh(V1, F1);
|
|
viewer.data().set_face_based(true);
|
|
mid_1 = viewer.selected_data_index;
|
|
|
|
|
|
update_visualization(viewer);
|
|
|
|
viewer.callback_key_down = &key_down;
|
|
|
|
// show the cow closer
|
|
viewer.core().camera_zoom = 2.0;
|
|
|
|
// Launch the viewer
|
|
viewer.launch();
|
|
}
|