41 lines
1.0 KiB
C++
41 lines
1.0 KiB
C++
#include <igl/readOFF.h>
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#include <igl/slice.h>
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#include <igl/floor.h>
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#include <igl/slice_into.h>
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#include <igl/viewer/Viewer.h>
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#include <iostream>
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int main(int argc, char *argv[])
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{
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using namespace Eigen;
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using namespace std;
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MatrixXd V;
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MatrixXi F;
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igl::readOFF("../shared/decimated-knight.off",V,F);
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// 100 random indicies into rows of F
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VectorXi I;
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igl::floor((0.5*(VectorXd::Random(100,1).array()+1.)*F.rows()).eval(),I);
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// 50 random indicies into rows of I
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VectorXi J;
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igl::floor((0.5*(VectorXd::Random(50,1).array()+1.)*I.rows()).eval(),J);
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// K = I(J);
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VectorXi K;
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igl::slice(I,J,K);
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// default green for all faces
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MatrixXd C = RowVector3d(0.4,0.8,0.3).replicate(F.rows(),1);
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// Red for each in K
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MatrixXd R = RowVector3d(1.0,0.3,0.3).replicate(K.rows(),1);
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// C(K,:) = R
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igl::slice_into(R,K,1,C);
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// Plot the mesh with pseudocolors
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igl::Viewer viewer;
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viewer.set_mesh(V, F);
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viewer.set_colors(C);
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viewer.launch();
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}
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