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D.13.2.55 removeCone
Procedure from library gfan.lib (see gfan_lib).
- Usage:
- removeCone(f,c[,b]); f fan, c cone, b int
- Assume:
- containsInCollection(f,c)=1
- Return:
- none, removes the cone c from f
if b=0, skips the check whether c is contained in f
Example:
| | LIB "gfan.lib";
intmat M[2][2]=1,0,0,1;
intmat N[2][2]=1,0,1,-1;
cone c=coneViaPoints(M);
cone d=coneViaPoints(N);
fan f=emptyFan(2);
insertCone(f,c);
insertCone(f,d);
f;
==> _application PolyhedralFan
==> _version 2.2
==> _type PolyhedralFan
==>
==> AMBIENT_DIM
==> 2
==>
==> DIM
==> 2
==>
==> LINEALITY_DIM
==> 0
==>
==> RAYS
==> 0 1 # 0
==> 1 -1 # 1
==> 1 0 # 2
==>
==> N_RAYS
==> 3
==>
==> LINEALITY_SPACE
==>
==> ORTH_LINEALITY_SPACE
==> -1 0 # 0
==> 0 -1 # 1
==>
==> F_VECTOR
==> 1 3 2
==>
==> SIMPLICIAL
==> 1
==>
==> PURE
==> 1
==>
==> CONES
==> {} # Dimension 0
==> {0} # Dimension 1
==> {1}
==> {2}
==> {0 2} # Dimension 2
==> {1 2}
==>
==> MAXIMAL_CONES
==> {0 2} # Dimension 2
==> {1 2}
==>
removeCone(f,c);
f;
==> _application PolyhedralFan
==> _version 2.2
==> _type PolyhedralFan
==>
==> AMBIENT_DIM
==> 2
==>
==> DIM
==> 2
==>
==> LINEALITY_DIM
==> 0
==>
==> RAYS
==> 1 -1 # 0
==> 1 0 # 1
==>
==> N_RAYS
==> 2
==>
==> LINEALITY_SPACE
==>
==> ORTH_LINEALITY_SPACE
==> -1 0 # 0
==> 0 -1 # 1
==>
==> F_VECTOR
==> 1 2 1
==>
==> SIMPLICIAL
==> 1
==>
==> PURE
==> 1
==>
==> CONES
==> {} # Dimension 0
==> {0} # Dimension 1
==> {1}
==> {0 1} # Dimension 2
==>
==> MAXIMAL_CONES
==> {0 1} # Dimension 2
==>
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