From: Danielle Bolan <n02702451@hawkmail.newpaltz.edu>
Date: Fri, 4 Jul 2014 15:43:46 +0000 (+0200)
Subject: Add vertices and points, messy!
X-Git-Tag: 1.0~147
X-Git-Url: https://svn.cri.ensmp.fr/git/linpy.git/commitdiff_plain/5a8e09e71168fe25cf699991936fda5094086054?ds=inline

Add vertices and points, messy!
---

diff --git a/pypol/domains.py b/pypol/domains.py
index 3034764..f3f551a 100644
--- a/pypol/domains.py
+++ b/pypol/domains.py
@@ -171,8 +171,6 @@ class Domain:
         from .polyhedra import Polyhedron
         islset = self._toislset(self.polyhedra, self.symbols)
         islbset = libisl.isl_set_sample(islset)
-        # next instruction should NOT be required
-        islbset = libisl.isl_basic_set_finalize(islbset)
         return Polyhedron._fromislbasicset(islbset, self.symbols)
 
     def intersection(self, *others):
@@ -223,13 +221,13 @@ class Domain:
         islset = self._toislset(self.polyhedra, self.symbols)
         islset = libisl.isl_set_lexmax(islset)
         return self._fromislset(islset, self.symbols)
-
+    
     def num_parameters(self):
         #could be useful with large, complicated polyhedrons
         islbset = self._toislbasicset(self.equalities, self.inequalities, self.symbols)
         num = libisl.isl_basic_set_dim(islbset, libisl.isl_dim_set)
         return num
-
+    
     def involves_dims(self, dims):
         #could be useful with large, complicated polyhedrons
         islset = self._toislset(self.polyhedra, self.symbols)
@@ -240,15 +238,45 @@ class Domain:
             for dim in dims:
                 if dim in symbols:
                     first = symbols.index(dims[0])
-                    n +=1
+                    n +=1  
                 else:
                     first = 0
-        else:
-            return False
+        else: 
+            return False            
         value = bool(libisl.isl_set_involves_dims(islset, libisl.isl_dim_set, first, n))
         libisl.isl_set_free(islset)
         return value
-
+    
+    def vertices(self):
+        if self.isbounded():
+            islbset = self._toislbasicset(self.equalities, self.inequalities, self.symbols)
+            vertices = libisl.isl_basic_set_compute_vertices(islbset);
+            vertexes = islhelper.isl_vertices_vertices(vertices)
+            #vertex = libisl.isl_vertices_get_n_vertices(vertices)
+            for verts in vertexes:
+                expr = libisl.isl_vertex_get_expr(verts);
+                this = islhelper.isl_set_to_str(expr)
+                print(this)
+        else:
+            raise TypeError('set must be bounded')
+        return string
+
+    def points(self):
+        bounds = {}
+        coordinates = []
+        symbols = self.symbols
+        if self.isbounded():
+            islset = self._toislset(self.polyhedra, self.symbols)
+            points = islhelper.isl_set_points(islset)
+            for sym in symbols:
+                for point in points:
+                    coordinate = libisl.isl_point_get_coordinate_val(point, libisl.isl_dim_set, symbols.index(sym))
+                    coordinate = islhelper.isl_val_to_int(coordinate)
+                    coordinates.append(coordinate)
+        else:
+            raise TypeError('set must be bounded')
+        return coordinates
+    
     @classmethod
     def _fromislset(cls, islset, symbols):
         from .polyhedra import Polyhedron