added pip option

README.md

@@ -31,14 +31,15 @@ Also checkout these other software projects that also create DAGMC geometry [CAD
 
 # Installation prerequisite
 
-In principle, any Conda/Mamba distribution will work. A few Conda/Mamba options are:
-- [Miniforge](https://github.com/conda-forge/miniforge) (recommended as it includes mamba)
-- [Anaconda](https://www.anaconda.com/download)
-- [Miniconda](https://docs.conda.io/en/latest/miniconda.html)
 
 
 # Install using Mamba and pip
 
+In principle, installing any Conda/Mamba distribution will work. A few Conda/Mamba options are:
+- [Miniforge](https://github.com/conda-forge/miniforge) (recommended as it includes mamba)
+- [Anaconda](https://www.anaconda.com/download)
+- [Miniconda](https://docs.conda.io/en/latest/miniconda.html)
+
 This example assumes you have installed the Miniforge option or separately have installed Mamba with ```conda install -c conda-forge mamba -y```
 
 Create a new conda environment, I've chosen Python 3.10 here but newer versions are
@@ -76,6 +77,11 @@ Another option would be to [install OpenMC from source](https://docs.openmc.org/
 
 # Install using Conda and pip
 
+In principle, installing any Conda/Mamba distribution will work. A few Conda/Mamba options are:
+- [Miniforge](https://github.com/conda-forge/miniforge) (recommended as it includes mamba)
+- [Anaconda](https://www.anaconda.com/download)
+- [Miniconda](https://docs.conda.io/en/latest/miniconda.html)
+
 This example uses Conda to install some dependencies that are not available via PyPi.
 
 Create a new conda environment
@@ -98,6 +104,22 @@ Then you can install the cad_to_dagmc package with ```pip```
 pip install cad_to_dagmc
 ```
 
+# Install using pip
+
+It is possible to avoid the use of conda and installing using pip and compiling from source.
+
+First compile MOAB (and install Pymoab) from source
+
+Then install cadquery and ocp using pip
+pip install cadquery-ocp==7.7.2
+pip install cadquery==2.4.0
+
+Then you can install the cad_to_dagmc package with ```pip```
+```bash
+pip install cad_to_dagmc
+```
+
+
 # Usage - with OpenMC
 
 You may also want to install OpenMC with DAGMC to make use of the h5m geometry files produced in simulations. However you could also use other supported particle transport codes such as MCNP, FLUKA and others supported by [DAGMC](https://svalinn.github.io/DAGMC/).