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5b89cb9 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | #include <igl/floor.h>
#include <igl/readOFF.h>
#include <igl/slice.h>
#include <igl/slice_into.h>
#include <igl/opengl/glfw/Viewer.h>
#include <iostream>
int main(int argc, char *argv[])
{
using namespace Eigen;
using namespace std;
MatrixXd V;
MatrixXi F;
igl::readOFF(TUTORIAL_SHARED_PATH "/decimated-knight.off",V,F);
// 100 random indices into rows of F
VectorXi I;
igl::floor((0.5*(VectorXd::Random(100,1).array()+1.)*F.rows()).eval(),I);
// 50 random indices into rows of I
VectorXi J;
igl::floor((0.5*(VectorXd::Random(50,1).array()+1.)*I.rows()).eval(),J);
// K = I(J);
VectorXi K;
igl::slice(I,J,K);
// default green for all faces
MatrixXd C = RowVector3d(0.4,0.8,0.3).replicate(F.rows(),1);
// Red for each in K
MatrixXd R = RowVector3d(1.0,0.3,0.3).replicate(K.rows(),1);
// C(K,:) = R
igl::slice_into(R,K,1,C);
// Plot the mesh with pseudocolors
igl::opengl::glfw::Viewer viewer;
viewer.data().set_mesh(V, F);
viewer.data().set_colors(C);
viewer.launch();
}
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