I want to code a shape recognition game. How do I code a shape library, that compares what a person drew on their screen.
P.s. without buying any recognizers from the asset store.
that is one of the toughest jobs youre trying to do.
You can do it, but thats not an easy task we can describe you here step by step, if you want to do it from scratch.
Look for machine learning, image recognition, neural networks, and youre getting a glimpse of what youre into.
A very simplistic approach would be, to predefine a set of shapes, generate some broader outlines and then test, if all active pixel are inside that outline. But you need to test different angles, different sizes and so on.
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Hyblademin has your answer