Extract cell indexing function

1 files changed, 18 insertions, 0 deletions

diff --git a/boltzgen/kernel/target/cell_index.py b/boltzgen/kernel/target/cell_index.py
new file mode 100644
index 0000000..7e74dc5
--- /dev/null
+++ b/boltzgen/kernel/target/cell_index.py
@@ -0,0 +1,18 @@
+class CellIndexer:
+    def __init__(self, geometry):
+        self.geometry   = geometry
+
+    def neighbor(self, c_i):
+        return self.gid(*[ c for _, c in enumerate(c_i) ])
+
+class XYZ(CellIndexer):
+    pass
+
+    def gid(self, x, y, z=0):
+        return x*self.geometry.size_y*self.geometry.size_z + y*self.geometry.size_z + z
+
+class ZYX(CellIndexer):
+    pass
+
+    def gid(self, x, y, z=0):
+        return z*self.geometry.size_x*self.geometry.size_y + y*self.geometry.size_x + x