X-Git-Url: https://scm.cri.ensmp.fr/git/linpy.git/blobdiff_plain/17f12d8f63d696f09dbb44be3dc24b9aba7b88d3..dba7d8fa774455d02d3cd3e0ab740fa9a727e4bb:/pypol/domains.py

diff --git a/pypol/domains.py b/pypol/domains.py
index 2fbd544..45040c8 100644
--- a/pypol/domains.py
+++ b/pypol/domains.py
@@ -260,28 +260,38 @@ class Domain:
     _RE_COORDINATE = re.compile(r'\((?P<num>\-?\d+)\)(/(?P<den>\d+))?')
 
     def vertices(self):
+        #returning list of verticies
+        from .polyhedra import Polyhedron
         islbset = self._toislbasicset(self.equalities, self.inequalities, self.symbols)
         vertices = libisl.isl_basic_set_compute_vertices(islbset);
         vertices = islhelper.isl_vertices_vertices(vertices)
         points = []
         for vertex in vertices:
-            expr = libisl.isl_vertex_get_expr(vertex);
+            expr = libisl.isl_vertex_get_expr(vertex)
+            point = {}
             if islhelper.isl_version < '0.13':
-                string = islhelper.isl_set_to_str(expr)
-                print(string)
-                # to be continued...
+                constraints = islhelper.isl_basic_set_constraints(expr)
+                for constraint in constraints:
+                    constant = libisl.isl_constraint_get_constant_val(constraint)
+                    constant = islhelper.isl_val_to_int(constant)
+                    for index, symbol in enumerate(self.symbols):
+                        coefficient = libisl.isl_constraint_get_coefficient_val(constraint,
+                            libisl.isl_dim_set, index)
+                        coefficient = islhelper.isl_val_to_int(coefficient)
+                        if coefficient != 0:
+                            coordinate = -Fraction(constant, coefficient)
+                            point[symbol]= coordinate
             else:
                 # horrible hack, find a cleaner solution
                 string = islhelper.isl_multi_aff_to_str(expr)
                 matches = self._RE_COORDINATE.finditer(string)
-                point = {}
                 for symbol, match in zip(self.symbols, matches):
                     numerator = int(match.group('num'))
                     denominator = match.group('den')
                     denominator = 1 if denominator is None else int(denominator)
                     coordinate = Fraction(numerator, denominator)
                     point[symbol] = coordinate
-                points.append(point)
+            points.append(point)
         return points
 
     def points(self):