Prepare for 1.20 release (#1723)

* Prepare for 1.20 release

* remove nightly built Conda package from the installation page

* update description for subpixel smoothing of MaterialGrid

* bump 1.20.0 date, update links

* whoops

* version bump

Co-authored-by: Steven G. Johnson <stevenj@alum.mit.edu>

NEWS.md

@@ -1,5 +1,21 @@
 # Meep Release Notes
 
+## Meep 1.20.0
+
+8/11/2021
+
+* Support for decimation of the DFT time-series updates ([#1684], [#1720], [#1722]).
+
+* Support for optional single-precision floating point for the DFT fields arrays ([#1675]).
+
+* Support for cache-oblivious loop tiling of the step-curl field updates ([#1655]).
+
+* Performance improvements in chunk-to-chunk communication ([#1656], [#1721]).
+
+* Code coverage for Python API via GitHub Actions ([#1651]).
+
+* Various bugfixes ([#1692], [#1704]), minor improvements, and additional documentation.
+
 ## Meep 1.19.0
 
 7/6/2021
@@ -424,7 +440,7 @@
 
   * Bug fixes in LDOS computation.
 
-  * Work around gcc bug [#54498], which caused a spurious PML test
+  * Work around gcc bug #54498, which caused a spurious PML test
     failure with gcc 4.7 and 4.7.1; thanks to Brahmanand Jogai and
     Thorsten Alteholz for the bug reports.
 
@@ -551,7 +567,7 @@ Meep 1.0.1
   * Fix failure in flux test under gcc 4.3.1 in some cases; thanks
     to Alex Prengel for the bug report.
 
-  * Fix compilation problem with gcc 4.4, correcting Debian bug [#505002].
+  * Fix compilation problem with gcc 4.4, correcting Debian bug #505002.
 
 ## Meep 1.0
 
@@ -779,171 +795,6 @@ Meep 1.0.1
   * Initial public release.
 
 <!--- generated links: -->
-[#1464]: https://github.com/NanoComp/meep/issues/1464
-[#1487]: https://github.com/NanoComp/meep/issues/1487
-[#1499]: https://github.com/NanoComp/meep/issues/1499
-[#1512]: https://github.com/NanoComp/meep/issues/1512
-[#1515]: https://github.com/NanoComp/meep/issues/1515
-[#1519]: https://github.com/NanoComp/meep/issues/1519
-[#1521]: https://github.com/NanoComp/meep/issues/1521
-[#1522]: https://github.com/NanoComp/meep/issues/1522
-[#1527]: https://github.com/NanoComp/meep/issues/1527
-[#1528]: https://github.com/NanoComp/meep/issues/1528
-[#13]: https://github.com/NanoComp/meep/issues/13
-[#14]: https://github.com/NanoComp/meep/issues/14
-[#20]: https://github.com/NanoComp/meep/issues/20
-[#21]: https://github.com/NanoComp/meep/issues/21
-[#40]: https://github.com/NanoComp/meep/issues/40
-[#55]: https://github.com/NanoComp/meep/issues/55
-[#56]: https://github.com/NanoComp/meep/issues/56
-[#96]: https://github.com/NanoComp/meep/issues/96
-[#105]: https://github.com/NanoComp/meep/issues/105
-[#150]: https://github.com/NanoComp/meep/issues/150
-[#184]: https://github.com/NanoComp/meep/issues/184
-[#189]: https://github.com/NanoComp/meep/issues/189
-[#191]: https://github.com/NanoComp/meep/issues/191
-[#192]: https://github.com/NanoComp/meep/issues/192
-[#193]: https://github.com/NanoComp/meep/issues/193
-[#203]: https://github.com/NanoComp/meep/issues/203
-[#248]: https://github.com/NanoComp/meep/issues/248
-[#259]: https://github.com/NanoComp/meep/issues/259
-[#261]: https://github.com/NanoComp/meep/issues/261
-[#266]: https://github.com/NanoComp/meep/issues/266
-[#305]: https://github.com/NanoComp/meep/issues/305
-[#341]: https://github.com/NanoComp/meep/issues/341
-[#345]: https://github.com/NanoComp/meep/issues/345
-[#357]: https://github.com/NanoComp/meep/issues/357
-[#376]: https://github.com/NanoComp/meep/issues/376
-[#388]: https://github.com/NanoComp/meep/issues/388
-[#392]: https://github.com/NanoComp/meep/issues/392
-[#396]: https://github.com/NanoComp/meep/issues/396
-[#416]: https://github.com/NanoComp/meep/issues/416
-[#417]: https://github.com/NanoComp/meep/issues/417
-[#419]: https://github.com/NanoComp/meep/issues/419
-[#422]: https://github.com/NanoComp/meep/issues/422
-[#427]: https://github.com/NanoComp/meep/issues/427
-[#454]: https://github.com/NanoComp/meep/issues/454
-[#456]: https://github.com/NanoComp/meep/issues/456
-[#477]: https://github.com/NanoComp/meep/issues/477
-[#479]: https://github.com/NanoComp/meep/issues/479
-[#483]: https://github.com/NanoComp/meep/issues/483
-[#500]: https://github.com/NanoComp/meep/issues/500
-[#518]: https://github.com/NanoComp/meep/issues/518
-[#531]: https://github.com/NanoComp/meep/issues/531
-[#558]: https://github.com/NanoComp/meep/issues/558
-[#559]: https://github.com/NanoComp/meep/issues/559
-[#570]: https://github.com/NanoComp/meep/issues/570
-[#577]: https://github.com/NanoComp/meep/issues/577
-[#578]: https://github.com/NanoComp/meep/issues/578
-[#581]: https://github.com/NanoComp/meep/issues/581
-[#593]: https://github.com/NanoComp/meep/issues/593
-[#596]: https://github.com/NanoComp/meep/issues/596
-[#599]: https://github.com/NanoComp/meep/issues/599
-[#602]: https://github.com/NanoComp/meep/issues/602
-[#603]: https://github.com/NanoComp/meep/issues/603
-[#626]: https://github.com/NanoComp/meep/issues/626
-[#630]: https://github.com/NanoComp/meep/issues/630
-[#631]: https://github.com/NanoComp/meep/issues/631
-[#644]: https://github.com/NanoComp/meep/issues/644
-[#652]: https://github.com/NanoComp/meep/issues/652
-[#655]: https://github.com/NanoComp/meep/issues/655
-[#666]: https://github.com/NanoComp/meep/issues/666
-[#671]: https://github.com/NanoComp/meep/issues/671
-[#675]: https://github.com/NanoComp/meep/issues/675
-[#681]: https://github.com/NanoComp/meep/issues/681
-[#689]: https://github.com/NanoComp/meep/issues/689
-[#699]: https://github.com/NanoComp/meep/issues/699
-[#705]: https://github.com/NanoComp/meep/issues/705
-[#728]: https://github.com/NanoComp/meep/issues/728
-[#744]: https://github.com/NanoComp/meep/issues/744
-[#747]: https://github.com/NanoComp/meep/issues/747
-[#752]: https://github.com/NanoComp/meep/issues/752
-[#769]: https://github.com/NanoComp/meep/issues/769
-[#771]: https://github.com/NanoComp/meep/issues/771
-[#779]: https://github.com/NanoComp/meep/issues/779
-[#785]: https://github.com/NanoComp/meep/issues/785
-[#787]: https://github.com/NanoComp/meep/issues/787
-[#789]: https://github.com/NanoComp/meep/issues/789
-[#791]: https://github.com/NanoComp/meep/issues/791
-[#795]: https://github.com/NanoComp/meep/issues/795
-[#807]: https://github.com/NanoComp/meep/issues/807
-[#817]: https://github.com/NanoComp/meep/issues/817
-[#860]: https://github.com/NanoComp/meep/issues/860
-[#862]: https://github.com/NanoComp/meep/issues/862
-[#863]: https://github.com/NanoComp/meep/issues/863
-[#868]: https://github.com/NanoComp/meep/issues/868
-[#869]: https://github.com/NanoComp/meep/issues/869
-[#872]: https://github.com/NanoComp/meep/issues/872
-[#876]: https://github.com/NanoComp/meep/issues/876
-[#891]: https://github.com/NanoComp/meep/issues/891
-[#894]: https://github.com/NanoComp/meep/issues/894
-[#919]: https://github.com/NanoComp/meep/issues/919
-[#922]: https://github.com/NanoComp/meep/issues/922
-[#927]: https://github.com/NanoComp/meep/issues/927
-[#940]: https://github.com/NanoComp/meep/issues/940
-[#945]: https://github.com/NanoComp/meep/issues/945
-[#952]: https://github.com/NanoComp/meep/issues/952
-[#953]: https://github.com/NanoComp/meep/issues/953
-[#960]: https://github.com/NanoComp/meep/issues/960
-[#994]: https://github.com/NanoComp/meep/issues/994
-[#1002]: https://github.com/NanoComp/meep/issues/1002
-[#1041]: https://github.com/NanoComp/meep/issues/1041
-[#1042]: https://github.com/NanoComp/meep/issues/1042
-[#1047]: https://github.com/NanoComp/meep/issues/1047
-[#1062]: https://github.com/NanoComp/meep/issues/1062
-[#1078]: https://github.com/NanoComp/meep/issues/1078
-[#1090]: https://github.com/NanoComp/meep/issues/1090
-[#1095]: https://github.com/NanoComp/meep/issues/1095
-[#1112]: https://github.com/NanoComp/meep/issues/1112
-[#1121]: https://github.com/NanoComp/meep/issues/1121
-[#1122]: https://github.com/NanoComp/meep/issues/1122
-[#1126]: https://github.com/NanoComp/meep/issues/1126
-[#1129]: https://github.com/NanoComp/meep/issues/1129
-[#1132]: https://github.com/NanoComp/meep/issues/1132
-[#1154]: https://github.com/NanoComp/meep/issues/1154
-[#1156]: https://github.com/NanoComp/meep/issues/1156
-[#1158]: https://github.com/NanoComp/meep/issues/1158
-[#1159]: https://github.com/NanoComp/meep/issues/1159
-[#1167]: https://github.com/NanoComp/meep/issues/1167
-[#1171]: https://github.com/NanoComp/meep/issues/1171
-[#1192]: https://github.com/NanoComp/meep/issues/1192
-[#1205]: https://github.com/NanoComp/meep/issues/1205
-[#1218]: https://github.com/NanoComp/meep/issues/1218
-[#1233]: https://github.com/NanoComp/meep/issues/1233
-[#1240]: https://github.com/NanoComp/meep/issues/1240
-[#1242]: https://github.com/NanoComp/meep/issues/1242
-[#1244]: https://github.com/NanoComp/meep/issues/1244
-[#1257]: https://github.com/NanoComp/meep/issues/1257
-[#1285]: https://github.com/NanoComp/meep/issues/1285
-[#1286]: https://github.com/NanoComp/meep/issues/1286
-[#1288]: https://github.com/NanoComp/meep/issues/1288
-[#1302]: https://github.com/NanoComp/meep/issues/1302
-[#1303]: https://github.com/NanoComp/meep/issues/1303
-[#1310]: https://github.com/NanoComp/meep/issues/1310
-[#1316]: https://github.com/NanoComp/meep/issues/1316
-[#1333]: https://github.com/NanoComp/meep/issues/1333
-[#1349]: https://github.com/NanoComp/meep/issues/1349
-[#1374]: https://github.com/NanoComp/meep/issues/1374
-[#1388]: https://github.com/NanoComp/meep/issues/1388
-[#1403]: https://github.com/NanoComp/meep/issues/1403
-[#1417]: https://github.com/NanoComp/meep/issues/1417
-[#1427]: https://github.com/NanoComp/meep/issues/1427
-[#1437]: https://github.com/NanoComp/meep/issues/1437
-[#1447]: https://github.com/NanoComp/meep/issues/1447
-[#1456]: https://github.com/NanoComp/meep/issues/1456
-[#1458]: https://github.com/NanoComp/meep/issues/1458
-[#1464]: https://github.com/NanoComp/meep/issues/1464
-[#1487]: https://github.com/NanoComp/meep/issues/1487
-[#1499]: https://github.com/NanoComp/meep/issues/1499
-[#1512]: https://github.com/NanoComp/meep/issues/1512
-[#1515]: https://github.com/NanoComp/meep/issues/1515
-[#1519]: https://github.com/NanoComp/meep/issues/1519
-[#1521]: https://github.com/NanoComp/meep/issues/1521
-[#1522]: https://github.com/NanoComp/meep/issues/1522
-[#1527]: https://github.com/NanoComp/meep/issues/1527
-[#1528]: https://github.com/NanoComp/meep/issues/1528
-[#54498]: https://github.com/NanoComp/meep/issues/54498
-[#505002]: https://github.com/NanoComp/meep/issues/505002
 [#13]: https://github.com/NanoComp/meep/issues/13
 [#14]: https://github.com/NanoComp/meep/issues/14
 [#20]: https://github.com/NanoComp/meep/issues/20
@@ -1117,6 +968,14 @@ Meep 1.0.1
 [#1623]: https://github.com/NanoComp/meep/issues/1623
 [#1634]: https://github.com/NanoComp/meep/issues/1634
 [#1635]: https://github.com/NanoComp/meep/issues/1635
+[#1651]: https://github.com/NanoComp/meep/issues/1651
 [#1652]: https://github.com/NanoComp/meep/issues/1652
-[#54498]: https://github.com/NanoComp/meep/issues/54498
-[#505002]: https://github.com/NanoComp/meep/issues/505002
+[#1655]: https://github.com/NanoComp/meep/issues/1655
+[#1656]: https://github.com/NanoComp/meep/issues/1656
+[#1675]: https://github.com/NanoComp/meep/issues/1675
+[#1684]: https://github.com/NanoComp/meep/issues/1684
+[#1692]: https://github.com/NanoComp/meep/issues/1692
+[#1704]: https://github.com/NanoComp/meep/issues/1704
+[#1720]: https://github.com/NanoComp/meep/issues/1720
+[#1721]: https://github.com/NanoComp/meep/issues/1721
+[#1722]: https://github.com/NanoComp/meep/issues/1722

README.md

@@ -15,7 +15,7 @@
 -   Simulation in **1d, 2d, 3d**, and **cylindrical** coordinates.
 -   Distributed memory [parallelism](https://meep.readthedocs.io/en/latest/Parallel_Meep) on any system supporting [MPI](https://en.wikipedia.org/wiki/MPI).
 -   Portable to any Unix-like operating system such as [Linux](https://en.wikipedia.org/wiki/Linux), [macOS](https://en.wikipedia.org/wiki/macOS), and [FreeBSD](https://en.wikipedia.org/wiki/FreeBSD).
--   **Precompiled binary packages** of official releases and nightly builds of the master branch via [Conda](https://meep.readthedocs.io/en/latest/Installation/#conda-packages).
+-   **Precompiled binary packages** of official releases via [Conda](https://meep.readthedocs.io/en/latest/Installation/#conda-packages).
 -   Variety of arbitrary [material](https://meep.readthedocs.io/en/latest/Materials) types: **anisotropic** electric permittivity ε and magnetic permeability μ, along with **dispersive** ε(ω) and μ(ω) including loss/gain, **nonlinear** (Kerr & Pockels) dielectric and magnetic materials, electric/magnetic **conductivities** σ, **saturable** gain/absorption, and **gyrotropic** media (magneto-optical effects).
 -   [Materials library](https://meep.readthedocs.io/en/latest/Materials/#materials-library) containing predefined broadband, complex refractive indices.
 -   [Perfectly matched layer](https://meep.readthedocs.io/en/latest/Perfectly_Matched_Layer) (**PML**) absorbing boundaries as well as **Bloch-periodic** and perfect-conductor boundary conditions.

configure.ac

@@ -1,13 +1,13 @@
 # Process this file with autoconf to produce a configure script.
 
-AC_INIT([meep],[m4_esyscmd(./version.sh 1.20.0-beta)])
+AC_INIT([meep],[m4_esyscmd(./version.sh 1.20.0)])
 AC_CONFIG_SRCDIR(src/step.cpp)
 
 # Shared-library version number; indicates api compatibility, and is
 # not the same as the "public" version number.  (Don't worry about this
 # except for public releases.) Note that any change to a C++ class
 # definition (in the .hpp file) generally breaks binary compatibility.
-SHARED_VERSION_INFO="24:0:0" # CURRENT:REVISION:AGE
+SHARED_VERSION_INFO="25:0:0" # CURRENT:REVISION:AGE
 
 AM_INIT_AUTOMAKE([foreign color-tests parallel-tests silent-rules 1.11])
 AM_SILENT_RULES(yes)

doc/docs/Acknowledgements.md

@@ -5,7 +5,7 @@
 Authors
 -------
 
-Meep originated as part of graduate research at [MIT](https://en.wikipedia.org/wiki/Massachusetts_Institute_of_Technology) with initial contributions by [Steven G. Johnson](http://math.mit.edu/~stevenj/), [Ardavan Oskooi](http://ab-initio.mit.edu/~oskooi/), [David Roundy](http://physics.oregonstate.edu/~roundyd/), [Mihai Ibanescu](https://www.linkedin.com/in/mihai-ibanescu-2b147825/), and [Peter Bermel](http://web.ics.purdue.edu/~pbermel/). Currently, the Meep project is maintained by [Simpetus](http://www.simpetus.com) and the developer community on [GitHub](https://github.com/NanoComp/meep). [Christopher Hogan](https://github.com/ChristopherHogan) and [M.T. Homer Reid](http://homerreid.dyndns.org/) lead the development of the [Python interface](Python_User_Interface.md), [mode-decomposition feature](Python_Tutorials/Mode_Decomposition.md), and [GDSII import routines](Python_Tutorials/GDSII_Import.md). M.T. Homer Reid and [Alec Hammond](https://github.com/smartalecH/) developed the [adjoint solver](Python_Tutorials/Adjoint_Solver.md). [Alex Cerjan](http://www.alexcerjan.com/) assisted with adding support for saturable absorption via [multilevel atomic gain media](Materials.md#saturable-gain-and-absorption). Alec Hammond developed the [visualization module](Python_User_Interface.md#data-visualization). [Yidong Chong](http://www1.spms.ntu.edu.sg/~ydchong/bio.html) and Alex Cerjan added support for [gyrotropic media](Materials.md#gyrotropic-media).
+Meep originated as part of graduate research at [MIT](https://en.wikipedia.org/wiki/Massachusetts_Institute_of_Technology) in the mid 2000s with initial contributions by [Steven G. Johnson](http://math.mit.edu/~stevenj/), [Ardavan Oskooi](http://ab-initio.mit.edu/~oskooi/), [David Roundy](http://physics.oregonstate.edu/~roundyd/), [Mihai Ibanescu](https://www.linkedin.com/in/mihai-ibanescu-2b147825/), and [Peter Bermel](http://web.ics.purdue.edu/~pbermel/). The project has been under continuous development for nearly 20 years. Currently, the Meep project is maintained by an active developer community on [GitHub](https://github.com/NanoComp/meep). [Christopher Hogan](https://github.com/ChristopherHogan) and [M.T. Homer Reid](http://homerreid.dyndns.org/) lead the development of the [Python interface](Python_User_Interface.md), [mode-decomposition feature](Python_Tutorials/Mode_Decomposition.md), and [GDSII import routines](Python_Tutorials/GDSII_Import.md). M.T. Homer Reid and [Alec Hammond](https://github.com/smartalecH/) developed the [adjoint solver](Python_Tutorials/Adjoint_Solver.md). [Alex Cerjan](http://www.alexcerjan.com/) assisted with adding support for saturable absorption via [multilevel atomic gain media](Materials.md#saturable-gain-and-absorption). Alec Hammond developed the [visualization module](Python_User_Interface.md#data-visualization). [Yidong Chong](http://www1.spms.ntu.edu.sg/~ydchong/bio.html) and Alex Cerjan added support for [gyrotropic media](Materials.md#gyrotropic-media). [Andreas Hoenselaar](https://github.com/ahoenselaar) contributed to several performance enhancements.
 
 Referencing
 -----------
@@ -27,4 +27,4 @@ General references on the FDTD method include, for example:
 Financial Support
 -----------------
 
-Meep's continued development has been supported by Small Business Innovation Research (SBIR) Phase 1 and 2 awards from the National Science Foundation (NSF) under award numbers [1647206](https://www.nsf.gov/awardsearch/showAward?AWD_ID=1647206) and [1758596](https://www.nsf.gov/awardsearch/showAward?AWD_ID=1758596). Initial development was supported in part by the Materials Research Science and Engineering Center program of the NSF under award numbers DMR-9400334 and DMR-0819762, by the Army Research Office through the Institute for Soldier Nanotechnologies under DAAD-19-02-D0002, and DARPA under N00014-05-1-0700 administered by the Office of Naval Research.
+Meep's development has been supported by Small Business Innovation Research (SBIR) Phase 1 and 2 awards from the National Science Foundation (NSF) under award numbers [1647206](https://www.nsf.gov/awardsearch/showAward?AWD_ID=1647206) and [1758596](https://www.nsf.gov/awardsearch/showAward?AWD_ID=1758596). Initial development was supported in part by the Materials Research Science and Engineering Center program of the NSF under award numbers DMR-9400334 and DMR-0819762, by the Army Research Office through the Institute for Soldier Nanotechnologies under DAAD-19-02-D0002, and DARPA under N00014-05-1-0700 administered by the Office of Naval Research.