Update README.md

README.md

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 ## Goals
 
 * This project follows my [Wheel Reinventor's Principles](https://github.com/tobloef/wheel-reinventors-principles): In short, it's made from scratch for learning and to tailor it to my specific use cases.
-* Learn the maths behind 3D projection and simple point lights.
+* Learn the maths behind projection, transformation, and simple lights.
 * Write an OBJ parser to load 3D models.
 * No graphics library or GPU usage. Just drawing one pixel at a time. Performance is a non-goal!