The original Twitter thread: https://x.com/TheGingerBill/status/1508833104567414785 I have a huge gripe when I read articles/tutorials on OpenGL: most people have no idea what they are talking about when it comes to coordinate systems and matrices. Specifically: OpenGL is NOT right-handed; the confusion over column-major “matrices”. Let’s clear up the first point. Many people will say OpenGL uses a right-handed coordinate system. Loads of articles/tutorials will keep repeating the view that OpenGL uses a right-handed coordinate system.