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# [Blueprints] - Seeing the value of an array x seconds ago? Calculating acceleration, G-force, etc.

 0 I've just worked out how to convert velocity into speed, given that velocity for character movement is measured in uu/second and a uu is about a centimeter. How would I calculate acceleration and G-force? I'm having trouble wrapping my head around measuring differences through time, since acceleration is a difference over the course of a second and I don't know how to see what a variable was a second ago. My instincts say to make an array and then calculate the index as the current index minus the call it took a second ago, but I don't really know how to do that - to see what the value of an array was exactly one second ago or five minutes ago or stuff like that. Would really appreciate some help. The end goal is to calculate g-forces which I'm also a bit stumped on, given I can't get at meaningful values of inertial or normal forces. My end goal is to black out a pilot based on sustained G. ​​​​​​​Thanks for reading and good hunting. Thanks for reading and I wish you all the best! Product Version: UE 4.16 Tags: more ▼ asked Oct 25 '17 at 08:33 AM in Blueprint Scripting Osakanone 23 ● 1 ● 5 ● 8 add new comment (comments are locked) 10|2000 characters needed characters left ▼ Viewable by all users