In this post I'll be showing two different ways to scale points along a specific direction (a vector). There isn't anything novel here, but it gives an example of the type of math encountered in game development, and how you might approach a solution. The first method involves matrices, and the second involves vector projections.…

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The post discusses two methods to scale points along a specific direction in game development: using matrices and vector projections. It provides a detailed explanation of both methods with examples, including the necessary mathematical steps and considerations for each approach. The C++ code implementation and practical applications, like a Petzval lens effect in bokeh depth of field rendering, are also highlighted.

Scaling Points In a Specific Direction