px.line erratic and wrong for large x value ranges

Problem

Plotting a straight line from ($-X$, 0) to ($+X$, 1) for various (large) $X$ within a much smaller window results in wrong and inconsistent behavior, as demonstrated in below minimum non-working examples (using a Jupyter notebook with plotly.js v2.27.0).

I doubt that this behavior can be explained by intrinsic rounding problems, since

>>> np.interp([-0.1,0.1],[-1e17,+1e17],[0,1])
array([0.5, 0.5])

>>> np.interp([-0.1,0.1],[-1e18,+1e18],[0,1])
array([0.5, 0.5])

Examples

Data frame

df = pd.DataFrame(dict(x=[-1e17,+1e17,-1e18,+1e18],
                       y=[0,1,0,1],
                       xlimit=['±1e17','±1e17','±1e18','±1e18']))

Very tight plotting range (symmetric 0.1)

fig = px.line(df,x='x',y='y',color='xlimit',
              range_x=[-.1,.1],
              range_y=[0.4,0.6],
              width=400,
              height=400,)
fig.update_traces(opacity=0.5)
fig.show()

Slightly wider plotting range (symmetric 0.3)

fig = px.line(df,x='x',y='y',color='xlimit',
              range_x=[-.3,.3],
              range_y=[0.4,0.6],
              width=400,
              height=400,)
fig.update_traces(opacity=0.5)
fig.show()

Another plotting range (symmetric 1)

fig = px.line(df,x='x',y='y',color='xlimit',
              range_x=[-1,1],
              range_y=[0.4,0.6],
              width=400,
              height=400,)
fig.update_traces(opacity=0.5)
fig.show()

Another even wider plotting range (symmetric 3)

fig = px.line(df,x='x',y='y',color='xlimit',
              range_x=[-3,3],
              range_y=[0.4,0.6],
              width=400,
              height=400,)
fig.update_traces(opacity=0.5)
fig.show()

Apparently wide enough plotting range (symmetric 3.2)

fig = px.line(df,x='x',y='y',color='xlimit',
              range_x=[-3.2,3.2],
              range_y=[0.4,0.6],
              width=400,
              height=400,)
fig.update_traces(opacity=0.5)
fig.show()

As far as my tests go, for any range_x that is wider than about ±3, the plotting is rendered correctly:

fig = px.line(df,x='x',y='y',color='xlimit',
              range_x=[-1e17,1e17],
              range_y=[0,1],
              width=400,
              height=400,)
fig.update_traces(opacity=0.5)
fig.show()

Reproduisez le problème dans un notebook Jupyter en utilisant px.line avec le DataFrame fourni, des valeurs range_x réduites et plotly.js v2.27.0. Comparez les lignes rendues pour les plages d’exemple et déterminez si le comportement trouve son origine dans le chemin plotly.py px.line ou dans le rendu plotly.js ; le travail est terminé lorsque les lignes pour les grandes plages sont rendues de manière cohérente dans les cas fournis.