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"Essentially we made a function that takes a two dimensional vector (x and y) and returns a four dimensional vector (r, g, b and a)." Really? Are you sure that’s what we did?
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What is smoothstep()? This example starts to lose me. There are many new elements here. Could you include a step by step walkthrough of this whole example before proceeding to the next part?
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Actually, this is the point where you lose me. I want it to be more gradual. It feels like there are 100 new concepts on this one page.
- took the freedom to explain more indepth what interpolation is and why it rocks :)