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Having fun with car physics

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    Having fun with car physics

    Hey there,

    I started a series of blog posts on various aspects of car physics in Unreal.

    Might interest some people here

    http://technicalgamedesign.blogspot....K%20Motorsport

    (Disclaimer: it's obviously full of physics and mechanic terms and concepts, so it might not be very easy to understand).

    #2
    Nice presentation of the problem of gear ratios in UDK Problem is, you took us to the very edge of the solution, and then stopped. Understanding a numerical gear ratio is much different than the torque curve. An example of how to replicate a given set of gears in the real world in a torque curve would be a great help, as well as matching that to the EngineRPMCurve.

    I have managed to get both to work, but without really understanding how;p

    Steven

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      #3
      Hey,

      Well, I stopped there because that's where I stopped in my work

      On the blog, I write more or less as I go. I need to make some good torque curves before caring about EngineRPM curve, but I'll get there. And yes, I'll explain how I managed to get those "good curves".

      Is there anything else you'd like me to expand on?

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        #4
        Something that I only thought about after I read your blog was that I have a different number of torque curves and EngineRPM curves. I only modified the existing torque curves to go from the default speed limit of about 65mph to the over 200mph we now have.
        But for the EngineRPM curves I added two more to make reverse and five forward gears. Does this cause any kind of conflict between the two?

        Steven

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          #5
          Shouldn't. EngineRPMcurve is really only used for the sound, as far as I know. In the example I showed on the blog, my EngineRPM curve is empty.

          Also adding "reverse gears" in EngineRPM shouldn't really work as the curve's x axis is the vehicle speed and negative speeds don't exist (or epic isn't using the formula I learned at school to determine a vector size)

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            #6
            Thanks Mougli!

            I'm trying to make an boost action to my vehicle, so your blog is really helpful.

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              #7
              I've added a couple of articles about gear ratio (again), torque curve, and engine sound.

              Disclaimer: These articles are NOT tutorials, it's just me sharing my experimentations notes. If I'm not explaining every single detail, that's on purpose.

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