Update license information and enhance documentation regarding usage rights

Author: zfergus

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2020 IPC-Sim
+Copyright (c) 2020–2025 Zachary Ferguson
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -89,4 +89,8 @@ Additionally, you can cite the original IPC paper:
 
 ## License
 
-MIT License © 2020, the IPC-Sim organization (See <a href="https://github.com/ipc-sim/ipc-toolkit/blob/main/LICENSE"><code>LICENSE</code></a> for details).
+This project is licensed under the MIT License.
+
+You are free to use, modify, and distribute this code in your projects, even commercial ones, as long as you include the original copyright and license notice. A copy of the full license text can be found in the <a href="https://github.com/ipc-sim/ipc-toolkit/blob/main/LICENSE"><code>LICENSE</code></a> file.
+
+If you use this code in a product you distribute to others, you are required to **include a copy of the original copyright and license notice**. This is typically done in the product's documentation, an "About" or "Third-Party Licenses" section, or in a clear open-source software statement.

docs/PYPI_README.md

@@ -82,4 +82,8 @@ Additionally, you can cite the original IPC paper:
 
 ## License
 
-MIT License © 2020, the IPC-Sim organization (See <a href="https://github.com/ipc-sim/ipc-toolkit/blob/main/LICENSE"><code>LICENSE.txt</code></a> for details)
+This project is licensed under the MIT License.
+
+You are free to use, modify, and distribute this code in your projects, even commercial ones, as long as you include the original copyright and license notice. A copy of the full license text can be found in the <a href="https://github.com/ipc-sim/ipc-toolkit/blob/main/LICENSE"><code>LICENSE</code></a> file.
+
+If you use this code in a product you distribute to others, you are required to **include a copy of the original copyright and license notice**. This is typically done in the product's documentation, an "About" or "Third-Party Licenses" section, or in a clear open-source software statement.

docs/source/cpp-api/index.rst

@@ -0,0 +1,38 @@
+C++ API
+=======
+
+.. list-table::
+    :header-rows: 1
+
+    * - Name
+      - Description
+    * - `Adhesion <adhesion.rst>`__
+      - Adhesion potential functions.
+    * - `Barrier <barrier/index.rst>`__
+      - Barrier functions and functionals.
+    * - `Broad Phase <broad_phase.rst>`__
+      - Algorithms for broad phase collision detection.
+    * - `Candidates <candidates.rst>`__
+      - Structures and utilities for collision candidates.
+    * - `Continuous Collision Detection <ccd.rst>`__
+      - Methods for detecting collisions over continuous motion.
+    * - `Collision Mesh <collision_mesh.rst>`__
+      - Data structures representing collision meshes.
+    * - `Distance <distance.rst>`__
+      - Functions for computing distances between geometric entities.
+    * - `Friction <friction.rst>`__
+      - Models and functions for frictional contact.
+    * - `Intersections <intersections.rst>`__
+      - Algorithms for detecting intersections between primitives.
+    * - `Interval Arithmetic <interval.rst>`__
+      - Utilities for interval arithmetic operations.
+    * - `Normal Collisions <normal_collisions.rst>`__
+      - Functions for handling normal contact collisions.
+    * - `Potentials <potentials/index.rst>`__
+      - General potential energy functions for contact modeling.
+    * - `Tangent <tangent.rst>`__
+      - Utilities for tangent vector computations.
+    * - `Tangential Collisions <tangential_collisions.rst>`__
+      - Functions for handling tangential contact collisions.
+    * - `Utils <utils.rst>`__
+      - Miscellaneous utility functions and helpers.

docs/source/index.rst

@@ -32,6 +32,7 @@
     :caption: C++ API
     :hidden:
 
+    Index <cpp-api/index.rst>
     cpp-api/adhesion.rst
     cpp-api/barrier/index.rst
     cpp-api/broad_phase.rst
@@ -52,6 +53,7 @@
     :caption: Python API
     :hidden:
 
+    Index <python-api/index.rst>
     python-api/adhesion.rst
     python-api/barrier.rst
     python-api/broad_phase.rst
@@ -151,4 +153,8 @@ IPC Toolkit is created and maintained by academics: citations let us know our wo
 
 **License**
 
-MIT License © 2020, the IPC-Sim organization (See `License <license.html>`_ for details).
+This project is licensed under the MIT License.
+
+You are free to use, modify, and distribute this code in your projects, even commercial ones, as long as you include the original copyright and license notice. A copy of the full license text can be found in the `License <license.html>`_ file.
+
+If you use this code in a product you distribute to others, you are required to **include a copy of the original copyright and license notice**. This is typically done in the product's documentation, an "About" or "Third-Party Licenses" section, or in a clear open-source software statement.

docs/source/python-api/index.rst

@@ -0,0 +1,38 @@
+C++ API
+=======
+
+.. list-table::
+    :header-rows: 1
+
+    * - Name
+      - Description
+    * - `Adhesion <adhesion.rst>`__
+      - Adhesion potential functions.
+    * - `Barrier <barrier.rst>`__
+      - Barrier functions and functionals.
+    * - `Broad Phase <broad_phase.rst>`__
+      - Algorithms for broad phase collision detection.
+    * - `Candidates <candidates.rst>`__
+      - Structures and utilities for collision candidates.
+    * - `Continuous Collision Detection <ccd.rst>`__
+      - Methods for detecting collisions over continuous motion.
+    * - `Collision Mesh <collision_mesh.rst>`__
+      - Data structures representing collision meshes.
+    * - `Distance <distance.rst>`__
+      - Functions for computing distances between geometric entities.
+    * - `Friction <friction.rst>`__
+      - Models and functions for frictional contact.
+    * - `Intersections <intersections.rst>`__
+      - Algorithms for detecting intersections between primitives.
+    * - `Interval Arithmetic <interval.rst>`__
+      - Utilities for interval arithmetic operations.
+    * - `Normal Collisions <normal_collisions.rst>`__
+      - Functions for handling normal contact collisions.
+    * - `Potentials <potentials.rst>`__
+      - General potential energy functions for contact modeling.
+    * - `Tangent <tangent.rst>`__
+      - Utilities for tangent vector computations.
+    * - `Tangential Collisions <tangential_collisions.rst>`__
+      - Functions for handling tangential contact collisions.
+    * - `Utils <utils.rst>`__
+      - Miscellaneous utility functions and helpers.