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#!/usr/bin/env python
import gudhi
st = gudhi.SimplexTree()
print("#######################################################################")
print("SimplexTree creation from insertion")
if st.insert([0,1]):
print("Inserted !!")
else:
print("Not inserted...")
if st.find([0,1]):
print("Found !!")
else:
print("Not found...")
if st.insert([0,1,2], filtration=4.0):
print("Inserted !!")
else:
print("Not inserted...")
# FIXME: Remove this line
st.set_dimension(3)
print("dimension=", st.dimension())
st.set_filtration(4.0)
st.initialize_filtration()
print("filtration=", st.get_filtration())
print("filtration[1,2]=", st.filtration([1,2]))
print("filtration[4,2]=", st.filtration([4,2]))
print("num_simplices=", st.num_simplices())
print("num_vertices=", st.num_vertices())
print("skeleton_tree[2]=", st.get_skeleton_tree(2))
print("skeleton_tree[1]=", st.get_skeleton_tree(1))
print("skeleton_tree[0]=", st.get_skeleton_tree(0))
print("#######################################################################")
print("SimplexTree creation from Rips")
st_from_rips = gudhi.SimplexTree(points=[[0,0],[1,0],[0,1],[1,1]],max_dimension=1,max_edge_length=42)
print("filtered_tree=", st_from_rips.get_filtered_tree())
print("star([0])=", st_from_rips.get_star_tree([0]))
print("coface([0],1)=", st_from_rips.get_coface_tree([0], 1))
print("#######################################################################")
print("MiniSimplexTree creation from insertion")
triangle012 = [0, 1, 2]
edge03 = [0, 3]
mini_st = gudhi.MiniSimplexTree()
mini_st.insert(triangle012)
mini_st.insert(edge03)
# FIXME: Remove this line
mini_st.set_dimension(2);
edge02 = [0, 2]
if mini_st.find(edge02):
# Only coface is 012
print("coface(edge02,1)=", mini_st.get_coface_tree(edge02, 1))
if mini_st.get_coface_tree(triangle012, 1) == []:
# Precondition: Check the simplex has no coface before removing it.
mini_st.remove_maximal_simplex(triangle012)
print("filtered_tree after triangle012 removal =", mini_st.get_filtered_tree())
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