Matrix multiplication in graphics APIs is ridiculously confusing. People are often confused about the right order of multiplying their matrices, and about row-major, column-major, pre-multiplication, post-multiplication, row vectors and column vectors, and transposing.
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What is the most commonly used bytecode language in the world? Java (JVM Bytecode)? .NET (CLI)? Flash (AVM1/AVM2)? Nope. There’s a few that you use every day, simply by turning on your computer, or tablet, or even phone. You don’t even have to start an application or visit a webpage.