Go back to the analogue version to understand the idea better

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Seeing the result of something polished and evolved hides the information about how it was put together and makes it harder to understand

I often made the mistake of thinking the analogue version is a distraction - why should I be thinking of special relativity in terms of trains and people standing on platforms. The problem is that the modern equivalents are not updated and you need to go back and understand what the original equipment did as well as understand the models and ideas derived from them, and the analogy stops working. It's a difficult balance. 

Once you do grok the analogy, you can turn to it whenever you need to remember the principle and derive from it again, more easily than working back from the results. There's a directionality and you can find yourself working against the stream.


Projection matrix


1. Pinhole camera model. Simple equation is generated, complexity comes in generalising for 3 and 4 component vectors.

2. Homohenous coordinates use redundancy in the vector representation, but ultimately describe 2d screenspace points


Computation

Ticker tapes


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