Add of tangential complex doc

Separate simplex tree from alpha complex



git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/ST_cythonize@1788 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: 1cf4a35e0a099501eb1cb6b9809041dd1a1e2617

2 files changed, 19 insertions, 16 deletions

diff --git a/src/cython/example/alpha_complex_diagram_persistence_from_off_file_example.py b/src/cython/example/alpha_complex_diagram_persistence_from_off_file_example.py
index d74eba57..40d06f93 100755
--- a/src/cython/example/alpha_complex_diagram_persistence_from_off_file_example.py
+++ b/src/cython/example/alpha_complex_diagram_persistence_from_off_file_example.py
@@ -52,15 +52,17 @@ with open(args.file, 'r') as f:
         message = "AlphaComplex with max_edge_length=" + repr(args.max_alpha_square)
         print(message)
         
-        alpha_complex = gudhi.AlphaComplex(off_file=args.file, max_alpha_square=args.max_alpha_square)
+        alpha_complex = gudhi.AlphaComplex(off_file=args.file)
+        simplex_tree = gudhi.SimplexTree()
+        alpha_complex.create_simplex_tree(simplex_tree, max_alpha_square=args.max_alpha_square)
     
-        message = "Number of simplices=" + repr(alpha_complex.num_simplices())
+        message = "Number of simplices=" + repr(simplex_tree.num_simplices())
         print(message)
         
-        diag = alpha_complex.persistence()
+        diag = simplex_tree.persistence()
     
         print("betti_numbers()=")
-        print(alpha_complex.betti_numbers())
+        print(simplex_tree.betti_numbers())
     
         if args.no_diagram == False:
             gudhi.diagram_persistence(diag)
diff --git a/src/cython/example/alpha_complex_from_points_example.py b/src/cython/example/alpha_complex_from_points_example.py
index da98f3d4..45319f7f 100755
--- a/src/cython/example/alpha_complex_from_points_example.py
+++ b/src/cython/example/alpha_complex_from_points_example.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 
-import gudhi
+from gudhi import AlphaComplex, SimplexTree
 
 """This file is part of the Gudhi Library. The Gudhi library
    (Geometric Understanding in Higher Dimensions) is a generic C++
@@ -30,38 +30,39 @@ __license__ = "GPL v3"
 
 print("#####################################################################")
 print("AlphaComplex creation from points")
-alpha_complex = gudhi.AlphaComplex(points=[[0, 0], [1, 0], [0, 1], [1, 1]],
-                                   max_alpha_square=60.0)
+alpha_complex = AlphaComplex(points=[[0, 0], [1, 0], [0, 1], [1, 1]])
+simplex_tree = SimplexTree()
+alpha_complex.create_simplex_tree(simplex_tree, max_alpha_square=60.0)
 
-if alpha_complex.find([0, 1]):
+if simplex_tree.find([0, 1]):
     print("[0, 1] Found !!")
 else:
     print("[0, 1] Not found...")
 
-if alpha_complex.find([4]):
+if simplex_tree.find([4]):
     print("[4] Found !!")
 else:
     print("[4] Not found...")
 
-if alpha_complex.insert([0, 1, 2], filtration=4.0):
+if simplex_tree.insert([0, 1, 2], filtration=4.0):
     print("[0, 1, 2] Inserted !!")
 else:
     print("[0, 1, 2] Not inserted...")
 
-if alpha_complex.insert([0, 1, 4], filtration=4.0):
+if simplex_tree.insert([0, 1, 4], filtration=4.0):
     print("[0, 1, 4] Inserted !!")
 else:
     print("[0, 1, 4] Not inserted...")
 
-if alpha_complex.find([4]):
+if simplex_tree.find([4]):
     print("[4] Found !!")
 else:
     print("[4] Not found...")
 
-print("dimension=", alpha_complex.dimension())
-print("filtered_tree=", alpha_complex.get_filtered_tree())
-print("star([0])=", alpha_complex.get_star_tree([0]))
-print("coface([0], 1)=", alpha_complex.get_coface_tree([0], 1))
+print("dimension=", simplex_tree.dimension())
+print("filtered_tree=", simplex_tree.get_filtered_tree())
+print("star([0])=", simplex_tree.get_star_tree([0]))
+print("coface([0], 1)=", simplex_tree.get_coface_tree([0], 1))
 
 print("point[0]=", alpha_complex.get_point(0))
 print("point[5]=", alpha_complex.get_point(5))