Link in normal example to docs (#1492)

Co-authored-by: Paul V Craven <[email protected]>
pythonarcade · Feb 1, 2023 · 102c27f · 102c27f
1 parent 283a712
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diff --git a/doc/example_code/how_to_examples/index.rst b/doc/example_code/how_to_examples/index.rst
@@ -725,6 +725,17 @@ Frame Buffers
 
    :ref:`perspective`
 
+.. _opengl:
+
+OpenGL
+^^^^^^
+
+.. figure:: thumbs/normal_mapping.png
+   :figwidth: 170px
+   :target: normal_mapping.html
+
+   :ref:`normal_mapping`
+
 .. _concept_games:
 
 Concept Games

diff --git a/doc/example_code/how_to_examples/normal_mapping.png b/doc/example_code/how_to_examples/normal_mapping.png
diff --git a/doc/example_code/how_to_examples/normal_mapping.rst b/doc/example_code/how_to_examples/normal_mapping.rst
@@ -0,0 +1,15 @@
+:orphan:
+
+.. _normal_mapping:
+
+Normal Mapping
+==============
+
+.. image:: normal_mapping.png
+    :width: 600px
+    :align: center
+    :alt: Screen shot of normal mapping
+
+.. literalinclude:: ../../../arcade/examples/gl/normal_mapping_simple.py
+    :caption: normal_mapping_simple.py
+    :linenos: