floor/ceil, slice and sort exampels

Former-commit-id: 6b245d62ea
2014-06-23 11:05:44 -04:00
parent dc860aa29b
commit 88a01da152
20 changed files with 496 additions and 50 deletions
@@ -0,0 +1,37 @@
+#include <igl/readOFF.h>
+#include <igl/slice_into.h>
+#include <igl/colon.h>
+#include <igl/sortrows.h>
+#include <igl/barycenter.h>
+#include <igl/jet.h>
+#include <igl/viewer/Viewer.h>
+#include <iostream>
+
+int main(int argc, char *argv[])
+{
+  using namespace Eigen;
+  using namespace std;
+  MatrixXd V;
+  MatrixXi F;
+  igl::readOFF("../shared/decimated-knight.off",V,F);
+
+  // Sort barycenters lexicographically
+  MatrixXd BC,sorted_BC;
+  igl::barycenter(V,F,BC);
+  VectorXi I,J;
+  igl::sortrows(BC,true,sorted_BC,I);
+  // Get sorted "place" from sorted indices
+  J.resize(I.rows());
+  // J(I) = 1:numel(I)
+  igl::slice_into(igl::colon<int>(0,I.size()-1),I,J);
+
+  // Pseudo-color based on sorted place
+  MatrixXd C;
+  igl::jet(J,true,C);
+
+  // Plot the mesh with pseudocolors
+  igl::Viewer viewer;
+  viewer.set_mesh(V, F);
+  viewer.set_colors(C);
+  viewer.launch();
+}