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ptuemmler merged 1 commit into from
Dec 15, 2025
Merged

add polarization app #13

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16 changes: 16 additions & 0 deletions docs/apps/PolarizationViewer/app.md
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---
authors:
- aherzig
- lseiffert
categories:
- Physics
tags:
- Draft
date: 2025-12-11
hide:
- toc
draft: true
---
# Polarization viewer
<!-- more -->
{{embed_app("100%", "800px")}}
184 changes: 184 additions & 0 deletions docs/apps/PolarizationViewer/app.py
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import numpy as np
import plotly.graph_objects as go
from shiny import App, ui
from shinywidgets import output_widget, render_widget


app_ui = ui.page_sidebar(
ui.sidebar(
ui.input_radio_buttons(
'polarization',
"Polarization",
{"lin_pol": "linear", "circ_pol": "circular"},
inline=True,
),

ui.layout_columns(
ui.card(
ui.card_header("Field E1 (x)"),
ui.input_slider('E1_amp', "Amplitude", 0, 1, 0.5),
ui.input_slider('phase1', "Phase", 0.0, 2.0, 0),
ui.input_slider('w1', "Frequency", 1.0, 5.0, 10),
ui.input_switch('show_E1', "Show Field", True),
),
ui.card(
ui.card_header("Field E2 (y)"),
ui.input_slider('E2_amp', "Amplitude", 0.0, 1.0, 0),
ui.input_slider('phase2', "Phase", 0.0, 2.0, 0),
ui.input_slider('w2', "Frequency", 1.0, 5.0, 10),
ui.input_switch('show_E2', "Show Field", True),
),
col_widths=6,
),
ui.card(
ui.layout_columns(
ui.input_switch('set_dphi', "Set phase difference", False),
ui.input_slider('dphi', "", 0.0, 2.0, 0, step=0.25),
),
),
ui.layout_columns(
ui.input_switch('same_freq', "Same frequency", True),
ui.input_numeric('time_max', "upper time limit", 1, min=1, max=100),
),

ui.input_dark_mode(id='dark_mode'),
open='always',
width = "35%"
),
ui.card(
output_widget(
"plot_fields",
width="600px", height="600px"
),
ui.layout_columns(
ui.input_switch('show_total', "Show total field", False),
ui.input_switch('show_v_proj', "Show vertical projection", False),
ui.input_switch('show_h_proj', "Show horizontal projection", False),
)
),
)

def server(input, output, session):

grey_bg = 'rgb(28, 30, 32)'

def calculate_fields():
step = 0.01
t = np.arange(0, input.time_max()+step, step=step)

w2 = input.w2()
if input.same_freq():
w2 = input.w1()
ui.update_slider('w2', value=w2)

phase2 = input.phase2()
if input.set_dphi():
help_phase = input.phase1() + input.dphi()
phase2 = help_phase%2
ui.update_slider('phase2', value=phase2)

if input.polarization() == "lin_pol":
e1_val = input.E1_amp() * np.cos(input.w1() * np.pi * t - input.phase1() * np.pi)
e2_val = input.E2_amp() * np.cos(w2 * np.pi * t - phase2 * np.pi)
ex1 = e1_val
ey1 = np.zeros_like(ex1)
ex2 = np.zeros_like(ex1)
ey2 = e2_val
else:
e1_val = input.E1_amp() * np.cos(input.w1() * np.pi * t - input.phase1() * np.pi) + input.E2_amp() * np.cos(w2 * np.pi * t - phase2 * np.pi)
e2_val = input.E1_amp() * np.sin(input.w1() * np.pi * t - input.phase1() * np.pi) - input.E2_amp() * np.sin(w2 * np.pi * t - phase2 * np.pi)
ex2 = input.E2_amp() * np.cos(w2 * np.pi * t - phase2 * np.pi)
ey2 = -input.E2_amp() * np.sin(w2 * np.pi * t - phase2 * np.pi)
ex1 = input.E1_amp() * np.cos(input.w1() * np.pi * t - input.phase1() * np.pi)
ey1 = input.E1_amp() * np.sin(input.w1() * np.pi * t - input.phase1() * np.pi)

return t, e1_val, e2_val, ex1, ey1, ex2, ey2

@render_widget
def plot_fields():
if input.dark_mode() == "dark":
template = 'plotly_dark'
bg_color = grey_bg
c_tot = 'white'
c1 = 'rgb(245, 34, 104)'
c2 = 'rgb(58, 233, 233)'
c_proj = 'rgb(170, 170, 170)'
else:
template = 'plotly_white'
bg_color = 'white'
c_tot = 'black'
c1 = 'rgb(157, 13, 21)'
c2 = 'rgb(13, 76, 149)'
c_proj = 'rgb(89, 89, 89)'

fig = go.Figure()

t, E1, E2, ex1, ey1, ex2, ey2 = calculate_fields()

if input.show_v_proj():
fig.add_trace(go.Scatter3d(
x=E1, y=E2, z=np.zeros_like(t),
mode='lines',
line=dict(color=c_proj,width=4),
opacity=0.7,
))
if input.show_h_proj():
fig.add_trace(go.Scatter3d(
x=E1, y=np.ones_like(E2)*1.5, z=t,
mode='lines',
line=dict(color=c_proj,width=4),
opacity=0.7,
))
fig.add_trace(go.Scatter3d(
x=np.ones_like(E1)*1.5, y=E2, z=t,
mode='lines',
line=dict(color=c_proj, width=4),
opacity=0.7,
))
if input.show_E1():
fig.add_trace(go.Scatter3d(
x=ex1, y=ey1, z=t,
mode='lines',
line=dict(color=c1,width=4),
))
if input.show_E2():
fig.add_trace(go.Scatter3d(
x=ex2, y=ey2, z=t,
mode='lines',
line=dict(color=c2,width=4),
))
if input.show_total():
fig.add_trace(go.Scatter3d(
x=E1, y=E2, z=t,
mode='lines',
line=dict(color=c_tot,width=4),
))


fig.update_layout(
template=template,
plot_bgcolor=bg_color,
paper_bgcolor=bg_color,
scene=dict(
xaxis_title="Ex",
yaxis_title="Ey",
zaxis_title="time",
xaxis=dict(range=[-1.5, 1.5]),
yaxis=dict(range=[-1.5, 1.5]),
zaxis=dict(range=[0, input.time_max()]),
camera=dict(
eye=dict(x=-1.6, y=-1.6, z=0.5),
center=dict(x=0, y=0, z=0.0),
#up=dict(x=0, y=0, z=1),
),
aspectmode="cube",
),
width=600,
height=600,
margin={"r": 0, "t": 0, "l": 0, "b": 60},
showlegend=False,
)
return fig


app = App(app_ui, server, debug=True)
2 changes: 2 additions & 0 deletions docs/apps/PolarizationViewer/requirements.txt
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numpy
plotly