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import math
from typing import List
from itertools import chain
import networkx as nx
import plotly.graph_objs as go
import numpy as np
def get_pipeline_graph(pipeline):
# Controls for how the graph is drawn
nodeColor = "#ffbf00"
nodeSize = 40
lineWidth = 2
lineColor = "#ffffff"
G = pipeline.graph
current_coordinate = (0, len(set([edge[0] for edge in G.edges()])) + 1)
# Transform G.edges into {node : all_connected_nodes} format
node_connections = {}
for in_node, out_node in G.edges():
if in_node in node_connections:
node_connections[in_node].append(out_node)
else:
node_connections[in_node] = [out_node]
# Get node coordinates/pos
fixed_pos_nodes = {}
for idx, (in_node, out_nodes) in enumerate(node_connections.items()):
if in_node not in fixed_pos_nodes:
fixed_pos_nodes[in_node] = np.array(
[current_coordinate[0], current_coordinate[1]]
)
current_coordinate = (current_coordinate[0], current_coordinate[1] - 1)
# If more than 1 out node, then branch out in X coordinate
if len(out_nodes) > 1:
# if length is odd
if (len(out_nodes) % 2) != 0:
middle_node = out_nodes[round(len(out_nodes) / 2, 0) - 1]
fixed_pos_nodes[middle_node] = np.array(
[current_coordinate[0], current_coordinate[1]]
)
out_nodes = [n for n in out_nodes if n != middle_node]
correction_coordinate = -len(out_nodes) / 2
for out_node in out_nodes:
fixed_pos_nodes[out_node] = np.array(
[
int(current_coordinate[0] + correction_coordinate),
int(current_coordinate[1]),
]
)
if correction_coordinate == -1:
correction_coordinate += 1
correction_coordinate += 1
current_coordinate = (current_coordinate[0], current_coordinate[1] - 1)
elif len(node_connections) - 1 == idx:
fixed_pos_nodes[out_nodes[0]] = np.array(
[current_coordinate[0], current_coordinate[1]]
)
pos = nx.spring_layout(G, pos=fixed_pos_nodes, fixed=G.nodes(), seed=42)
for node in G.nodes:
G.nodes[node]["pos"] = list(pos[node])
# Make list of nodes for plotly
node_x = []
node_y = []
node_name = []
for node in G.nodes():
node_name.append(G.nodes[node]["component"].name)
x, y = G.nodes[node]["pos"]
node_x.append(x)
node_y.append(y)
# Make a list of edges for plotly, including line segments that result in arrowheads
edge_x = []
edge_y = []
for edge in G.edges():
start = G.nodes[edge[0]]["pos"]
end = G.nodes[edge[1]]["pos"]
# addEdge(start, end, edge_x, edge_y, lengthFrac=1, arrowPos = None, arrowLength=0.025, arrowAngle = 30, dotSize=20)
edge_x, edge_y = addEdge(
start,
end,
edge_x,
edge_y,
lengthFrac=0.5,
arrowPos="end",
arrowLength=0.04,
arrowAngle=40,
dotSize=nodeSize,
)
edge_trace = go.Scatter(
x=edge_x,
y=edge_y,
line=dict(width=lineWidth, color=lineColor),
hoverinfo="none",
mode="lines",
)
node_trace = go.Scatter(
x=node_x,
y=node_y,
mode="markers+text",
textposition="middle right",
hoverinfo="none",
text=node_name,
marker=dict(showscale=False, color=nodeColor, size=nodeSize),
textfont=dict(size=18),
)
fig = go.Figure(
data=[edge_trace, node_trace],
layout=go.Layout(
showlegend=False,
hovermode="closest",
margin=dict(b=20, l=5, r=5, t=40),
xaxis=dict(showgrid=False, zeroline=False, showticklabels=False),
yaxis=dict(showgrid=False, zeroline=False, showticklabels=False),
),
)
fig.update_layout(
yaxis=dict(scaleanchor="x", scaleratio=1), plot_bgcolor="rgb(14,17,23)"
)
return fig
def addEdge(
start,
end,
edge_x,
edge_y,
lengthFrac=1,
arrowPos=None,
arrowLength=0.025,
arrowAngle=30,
dotSize=20,
):
# Get start and end cartesian coordinates
x0, y0 = start
x1, y1 = end
# Incorporate the fraction of this segment covered by a dot into total reduction
length = math.sqrt((x1 - x0) ** 2 + (y1 - y0) ** 2)
dotSizeConversion = 0.0565 / 20 # length units per dot size
convertedDotDiameter = dotSize * dotSizeConversion
lengthFracReduction = convertedDotDiameter / length
lengthFrac = lengthFrac - lengthFracReduction
# If the line segment should not cover the entire distance, get actual start and end coords
skipX = (x1 - x0) * (1 - lengthFrac)
skipY = (y1 - y0) * (1 - lengthFrac)
x0 = x0 + skipX / 2
x1 = x1 - skipX / 2
y0 = y0 + skipY / 2
y1 = y1 - skipY / 2
# Append line corresponding to the edge
edge_x.append(x0)
edge_x.append(x1)
edge_x.append(
None
) # Prevents a line being drawn from end of this edge to start of next edge
edge_y.append(y0)
edge_y.append(y1)
edge_y.append(None)
# Draw arrow
if not arrowPos == None:
# Find the point of the arrow; assume is at end unless told middle
pointx = x1
pointy = y1
eta = math.degrees(math.atan((x1 - x0) / (y1 - y0))) if y1 != y0 else 90.0
if arrowPos == "middle" or arrowPos == "mid":
pointx = x0 + (x1 - x0) / 2
pointy = y0 + (y1 - y0) / 2
# Find the directions the arrows are pointing
signx = (x1 - x0) / abs(x1 - x0) if x1 != x0 else +1 # verify this once
signy = (y1 - y0) / abs(y1 - y0) if y1 != y0 else +1 # verified
# Append first arrowhead
dx = arrowLength * math.sin(math.radians(eta + arrowAngle))
dy = arrowLength * math.cos(math.radians(eta + arrowAngle))
edge_x.append(pointx)
edge_x.append(pointx - signx**2 * signy * dx)
edge_x.append(None)
edge_y.append(pointy)
edge_y.append(pointy - signx**2 * signy * dy)
edge_y.append(None)
# And second arrowhead
dx = arrowLength * math.sin(math.radians(eta - arrowAngle))
dy = arrowLength * math.cos(math.radians(eta - arrowAngle))
edge_x.append(pointx)
edge_x.append(pointx - signx**2 * signy * dx)
edge_x.append(None)
edge_y.append(pointy)
edge_y.append(pointy - signx**2 * signy * dy)
edge_y.append(None)
return edge_x, edge_y
def add_arrows(
source_x: List[float],
target_x: List[float],
source_y: List[float],
target_y: List[float],
arrowLength=0.025,
arrowAngle=30,
):
pointx = list(map(lambda x: x[0] + (x[1] - x[0]) / 2, zip(source_x, target_x)))
pointy = list(map(lambda x: x[0] + (x[1] - x[0]) / 2, zip(source_y, target_y)))
etas = list(
map(
lambda x: math.degrees(math.atan((x[1] - x[0]) / (x[3] - x[2]))),
zip(source_x, target_x, source_y, target_y),
)
)
signx = list(
map(lambda x: (x[1] - x[0]) / abs(x[1] - x[0]), zip(source_x, target_x))
)
signy = list(
map(lambda x: (x[1] - x[0]) / abs(x[1] - x[0]), zip(source_y, target_y))
)
dx = list(map(lambda x: arrowLength * math.sin(math.radians(x + arrowAngle)), etas))
dy = list(map(lambda x: arrowLength * math.cos(math.radians(x + arrowAngle)), etas))
none_spacer = [None for _ in range(len(pointx))]
arrow_line_x = list(
map(lambda x: x[0] - x[1] ** 2 * x[2] * x[3], zip(pointx, signx, signy, dx))
)
arrow_line_y = list(
map(lambda x: x[0] - x[1] ** 2 * x[2] * x[3], zip(pointy, signx, signy, dy))
)
arrow_line_1x_coords = list(chain(*zip(pointx, arrow_line_x, none_spacer)))
arrow_line_1y_coords = list(chain(*zip(pointy, arrow_line_y, none_spacer)))
dx = list(map(lambda x: arrowLength * math.sin(math.radians(x - arrowAngle)), etas))
dy = list(map(lambda x: arrowLength * math.cos(math.radians(x - arrowAngle)), etas))
none_spacer = [None for _ in range(len(pointx))]
arrow_line_x = list(
map(lambda x: x[0] - x[1] ** 2 * x[2] * x[3], zip(pointx, signx, signy, dx))
)
arrow_line_y = list(
map(lambda x: x[0] - x[1] ** 2 * x[2] * x[3], zip(pointy, signx, signy, dy))
)
arrow_line_2x_coords = list(chain(*zip(pointx, arrow_line_x, none_spacer)))
arrow_line_2y_coords = list(chain(*zip(pointy, arrow_line_y, none_spacer)))
x_arrows = arrow_line_1x_coords + arrow_line_2x_coords
y_arrows = arrow_line_1y_coords + arrow_line_2y_coords
return x_arrows, y_arrows
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