sage/toric_topdata.sage

@@ -739,4 +739,35 @@ class ToricPolytopeCICY(ToricPolytope):
             nef_partition=nef_partition,
             lvec=lvec
         )
- 
+    
+class ToricPolytopeProjectiveSpace(ToricPolytope):
+    """
+    Computes topological data for hypersurfaces in toric ambient spaces.
+    """
+    def _compute_points_from_weights(self, weights):
+        # Convert the weights of the projective space to the corresponding points
+        dimension = len(weights) - 1
+        points = identity_matrix(dimension)
+        try:
+            weights.remove(1)
+        except ValueError:
+            raise ValueError("The weights must include a 1 for the projective space.")
+
+        points = points.insert_row(0, [-w for w in weights])
+        return list(points)
+    
+    def __init__(
+            self,
+            weights,
+            no_triangulation = 0,
+            model_name = None,
+            nef_partition = None,
+            lvec = None, # Note that the inner point is the last entry
+        ):
+        super().__init__(
+            self._compute_points_from_weights(weights),
+            no_triangulation=no_triangulation,
+            model_name=model_name,
+            nef_partition=nef_partition,
+            lvec=lvec
+        )