visualizer: Offset layers at same rank

Layers at the same rank will now be slightly offset. Increased
line width for adjacencies.
Added igraph and plotly packages to extra requirements.

Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>

2 files changed, 36 insertions, 5 deletions

diff --git a/rumba/visualizer.py b/rumba/visualizer.py
index f8c18e6..4e7aa7f 100755
--- a/rumba/visualizer.py
+++ b/rumba/visualizer.py
@@ -210,7 +210,7 @@ def _create_system_coords(network):
     edges = _create_system_graph(network)
 
     g = ig.Graph(edges, directed=False)
-    layout = g.layout('drl', dim=2)
+    layout = g.layout('fr', dim=2)
 
     for system in network['_systems']:
         n = system['node']
@@ -240,11 +240,29 @@ def _get_ipcps_by_rank(ipcps, rank):
     return [ipcp for ipcp in ipcps if ipcp['rank'] == rank]
 
 
+def _get_ipcps_by_layer(network, layer):
+    return [ipcp for ipcp in network['_ipcps'] if ipcp['layer'] == layer]
+
+
+def _get_rank_for_layer(network, layer):
+    for ipcp in network['_ipcps']:
+        if ipcp['layer'] == layer:
+            return ipcp['rank']
+
+    return 0
+
+
+def _get_layers_by_rank(network, rank):
+    return [layer for layer in network['layers']
+            if _get_rank_for_layer(network, layer) == rank]
+
+
 def _create_ipcp_coords(network, radius):
     """
     Create 3d coordinates for IPCPs based on the system layout
     """
-    height = 1
+    height = 1.0
+    max_rank = 0
 
     for system in network['_systems']:
         ipcps = _get_ipcps_for_system(network, system)
@@ -264,6 +282,18 @@ def _create_ipcp_coords(network, radius):
                 new_y = y + radius * cos((m/n) * pi)
                 ipcp['coords'] = (new_x, new_y, rank * height)
                 m += 1
+            max_rank = max(max_rank, rank)
+
+    for rank in range(max_rank + 1):
+        layers = _get_layers_by_rank(network, rank)
+        increment = height / (3 / 2 * len(layers))
+        offset = 0
+        for layer in layers:
+            ipcps = _get_ipcps_by_layer(network, layer)
+            for ipcp in ipcps:
+                (x, y, z) = ipcp['coords']
+                ipcp['coords'] = (x, y, z + offset)
+            offset += increment
 
 
 def _create_ipcp_graph_data(network):
@@ -370,7 +400,7 @@ def draw_network(network, name='Ouroboros network'):
         line=dict(color=colors,
                   colorscale='Viridis',
                   dash='solid',
-                  width=2),
+                  width=4),
         hoverinfo='none'
     )
 
@@ -383,7 +413,7 @@ def draw_network(network, name='Ouroboros network'):
         mode='lines',
         line=dict(color=colors,
                   colorscale='Viridis',
-                  dash='dashdot',
+                  dash='solid',
                   width=1),
         hoverinfo='none'
     )
diff --git a/setup.py b/setup.py
index 6c4fd62..058a26c 100755
--- a/setup.py
+++ b/setup.py
@@ -31,6 +31,7 @@ setuptools.setup(
         'enum34; python_version<"3.0"'
     ],
     extras_require={'NumpyAcceleration': ['numpy'],
-                    'graphs' : ['pydot']},
+                    'graphs': ['pydot'],
+                    'visualizer': ['igraph', 'plotly']},
     scripts=['tools/rumba-access']
 )