diff options
Diffstat (limited to 'src/Collapse/example')
-rw-r--r-- | src/Collapse/example/CMakeLists.txt | 10 | ||||
-rw-r--r-- | src/Collapse/example/edge_collapse_basic_example.cpp | 45 | ||||
-rw-r--r-- | src/Collapse/example/edge_collapse_example_basic.txt | 5 |
3 files changed, 60 insertions, 0 deletions
diff --git a/src/Collapse/example/CMakeLists.txt b/src/Collapse/example/CMakeLists.txt new file mode 100644 index 00000000..6cf3bf07 --- /dev/null +++ b/src/Collapse/example/CMakeLists.txt @@ -0,0 +1,10 @@ +project(Edge_collapse_examples) + +# Point cloud +add_executable ( Edge_collapse_example_basic edge_collapse_basic_example.cpp ) + +if (TBB_FOUND) + target_link_libraries(Edge_collapse_example_basic ${TBB_LIBRARIES}) +endif() + +add_test(NAME Edge_collapse_example_basic COMMAND $<TARGET_FILE:Edge_collapse_example_basic>) diff --git a/src/Collapse/example/edge_collapse_basic_example.cpp b/src/Collapse/example/edge_collapse_basic_example.cpp new file mode 100644 index 00000000..a154c6bb --- /dev/null +++ b/src/Collapse/example/edge_collapse_basic_example.cpp @@ -0,0 +1,45 @@ +#include <gudhi/Flag_complex_sparse_matrix.h> + +#include <iostream> +#include <vector> + +int main() { + // Type definitions + using Filtration_value = float; + using Vertex_handle = short; + using Flag_complex_sparse_matrix = Gudhi::collapse::Flag_complex_sparse_matrix<Vertex_handle, Filtration_value>; + using Filtered_edge = Flag_complex_sparse_matrix::Filtered_edge; + using Filtered_edge_list = std::vector<Filtered_edge>; + using Edge = Flag_complex_sparse_matrix::Edge; + + // 1 2 + // o---o + // |\ /| + // | x | + // |/ \| + // o---o + // 0 3 + Filtered_edge_list graph = {{{0, 1}, 1.}, + {{1, 2}, 1.}, + {{2, 3}, 1.}, + {{3, 0}, 1.}, + {{0, 2}, 2.}, + {{1, 3}, 2.}}; + + Flag_complex_sparse_matrix flag_complex_sparse_matrix(graph); + + Filtered_edge_list collapse_edges; + // Retrieve collapse edges from the output iterator + flag_complex_sparse_matrix.filtered_edge_collapse( + [&collapse_edges](std::pair<Vertex_handle, Vertex_handle> edge, Filtration_value filtration) { + collapse_edges.push_back({edge, filtration}); + }); + + for (Filtered_edge filtered_edge_from_collapse : collapse_edges) { + Edge edge_from_collapse = std::get<0>(filtered_edge_from_collapse); + std::cout << "fn[" << std::get<0>(edge_from_collapse) << ", " << std::get<1>(edge_from_collapse) << "] = " + << std::get<1>(filtered_edge_from_collapse) << std::endl; + } + + return 0; +} diff --git a/src/Collapse/example/edge_collapse_example_basic.txt b/src/Collapse/example/edge_collapse_example_basic.txt new file mode 100644 index 00000000..acecacaf --- /dev/null +++ b/src/Collapse/example/edge_collapse_example_basic.txt @@ -0,0 +1,5 @@ +fn[0, 1] = 1 +fn[1, 2] = 1 +fn[2, 3] = 1 +fn[3, 0] = 1 +fn[0, 2] = 2 |