From d9ac64ff9b0e1ac364dc5117bab6eabf178936d2 Mon Sep 17 00:00:00 2001
From: Camille Woicekowska <61211168+camille12225@users.noreply.github.com>
Date: Thu, 15 Jun 2023 10:31:17 -0700
Subject: Added external field loading from file to picmi.py (#3945)

* Added external field loading from file to picmi.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update Python/pywarpx/picmi.py

Co-authored-by: Roelof Groenewald <40245517+roelof-groenewald@users.noreply.github.com>

* Added documentation

* Removed init, documentation

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Updated picmi version in requirements.txt

* Updated picmi version in setup.py

* Updated picmi version in requirements.txt

* Updated name of call to picmi class

* Adapted CI test for PICMI field loading from file

* Added PICMI input script

* Added .json file with new file name

* fixed small errors

* Fixed error in input script

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Removed old comments from code

* fixed import, spacing in input script

* fixed spacing

* cleaned up input script

* fixed typo

* removed blocking factor

* fixed name of test

* correct ion species name

* Added initial field to sim object

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Roelof Groenewald <40245517+roelof-groenewald@users.noreply.github.com>
---
 Python/pywarpx/picmi.py | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'Python/pywarpx/picmi.py')

diff --git a/Python/pywarpx/picmi.py b/Python/pywarpx/picmi.py
index 621757132..0f0426ca6 100644
--- a/Python/pywarpx/picmi.py
+++ b/Python/pywarpx/picmi.py
@@ -1175,6 +1175,15 @@ class LaserAntenna(picmistandard.PICMI_LaserAntenna):
             ) / constants.c
 
 
+class LoadInitialField(picmistandard.PICMI_LoadGriddedField):
+    def initialize_inputs(self):
+        pywarpx.warpx.read_fields_from_path = self.read_fields_from_path
+        if self.load_E:
+            pywarpx.warpx.E_ext_grid_init_style = 'read_from_file'
+        if self.load_B:
+            pywarpx.warpx.B_ext_grid_init_style = 'read_from_file'
+
+
 class AnalyticInitialField(picmistandard.PICMI_AnalyticAppliedField):
     def init(self, kw):
         self.mangle_dict = None
-- 
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