cloud_parcel example (+env_state::air_density accessor +making condensation logic accessible by setting -DPMC_USE_SUNDIALS="1" during compilation of PyPartMC) (#339)

Co-authored-by: Jeffrey Curtis <[email protected]>

Author: slayoo

CMakeLists.txt

@@ -504,7 +504,7 @@ foreach(target _PyPartMC)
     $<$<NOT:$<CXX_COMPILER_ID:MSVC>>:-Wno-unused-parameter>
   )
 endforeach()
-
+target_compile_definitions(_PyPartMC PRIVATE PMC_USE_SUNDIALS="1")
 include(CheckCXXSourceCompiles)
 file(GLOB PyPartMC_headers ${CMAKE_SOURCE_DIR}/src/*.hpp)
 if (NOT "${CMAKE_REQUIRED_INCLUDES}" STREQUAL "")

README.md

@@ -55,6 +55,11 @@ Note: clicking the badges below redirects to cloud-computing platforms. The mybi
 [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/open-atmos/PyPartMC/blob/main/examples/mie_optical.ipynb)
 [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/open-atmos/PyPartMC.git/main?urlpath=lab/tree/examples/mie_optical.ipynb)
 [![ARM JupyterHub](https://img.shields.io/static/v1?label=launch%20in&logo=jupyter&color=lightblue&message=ARM+JupyterHub)](https://jupyterhub.arm.gov/hub/user-redirect/git-pull?repo=https%3A//github.com/open-atmos/PyPartMC&branch=main&urlPath=)
+- Cloud parcel example:
+[![View notebook](https://img.shields.io/static/v1?label=render%20on&logo=github&color=87ce3e&message=GitHub)](https://github.com/open-atmos/PyPartMC/blob/main/examples/cloud_parcel.ipynb)
+[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/open-atmos/PyPartMC/blob/main/examples/cloud_parcel.ipynb)
+[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/open-atmos/PyPartMC.git/main?urlpath=lab/tree/examples/cloud_parcel.ipynb)
+[![ARM JupyterHub](https://img.shields.io/static/v1?label=launch%20in&logo=jupyter&color=lightblue&message=ARM+JupyterHub)](https://jupyterhub.arm.gov/hub/user-redirect/git-pull?repo=https%3A//github.com/open-atmos/PyPartMC&branch=main&urlPath=)
 
 ## Features