openframeworks - How to implement bullet time in Box2d? -

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I want to implement some type of bullet time for my box2d app, googling around I found a post That they suggest changing the timestep (something like 1/30 to 1/60) but it was quickly marked as poor practice, whatever slow speed, triggered an original on / off for any ideas is?

does not negatively affect simulation to change the time phase, so just a short time Use the step.

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