From b8c445b3fc51cca89407dc9ea76fee6f5df70312 Mon Sep 17 00:00:00 2001
From: Thomas Kramer <code@tkramer.ch>
Date: Mon, 29 Apr 2024 22:04:02 +0200
Subject: [PATCH] inspect routing: shift layers for pseudo 3D plotting
---
src/lclayout/graphrouter/inspect.py | 12 ++++++++++--
src/lclayout/standalone.py | 3 +++
2 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/src/lclayout/graphrouter/inspect.py b/src/lclayout/graphrouter/inspect.py
index 6e760df..1f8aee1 100644
--- a/src/lclayout/graphrouter/inspect.py
+++ b/src/lclayout/graphrouter/inspect.py
@@ -8,6 +8,7 @@ Wrap a graph router and add visual inspection capabilities.
import os
import math
import networkx as nx
+from ..layout.layers import layermap
from typing import *
import logging
@@ -41,7 +42,8 @@ class InspectRouter(GraphRouter):
solutions = self.sub_graphrouter.route(routing_problem)
for routes in solutions:
- self._inspect(routes)
+ if routes:
+ self._inspect(routes)
yield routes
self.iteration_count += 1
@@ -53,11 +55,17 @@ class InspectRouter(GraphRouter):
def _plot_to_file(self, routes: Dict[Any, nx.Graph]):
path = os.path.join(self.output_dir, f"routing_iter_{self.iteration_count:04}.png")
+ # Compute offsets for pseudo 3D plotting.
+ layer_names = sorted(layermap.keys(), key=lambda n: layermap[n][0])
+ layer_offset = {n: i for i, n in enumerate(layer_names)}
+
+ # Find positions of graph nodes.
pos = dict()
for n in self._graph.nodes():
if not self._is_virtual_node_fn(n):
layer, (x, y) = n
- pos[n] = (x, y)
+ offset = 16*layer_offset[layer]
+ pos[n] = (x-offset, y+offset)
def hue2rgb(hue: float) -> str:
# Create a HTML color code from a hue value.
diff --git a/src/lclayout/standalone.py b/src/lclayout/standalone.py
index edd50c8..4af7aca 100644
--- a/src/lclayout/standalone.py
+++ b/src/lclayout/standalone.py
@@ -924,6 +924,9 @@ def main():
level=log_level,
filename=args.log)
+ # Silence very verbose matplotlib.
+ logging.getLogger("matplotlib").setLevel(logging.WARNING)
+
# Load netlist of cell
cell_name = args.cell
netlist_path = args.netlist
--
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