1. #1

    How do dummy's and sliders work?

    How do you make dummy's and sliders work and what is their use?
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  2. #2

    Re: How do dummy's and sliders work?

    Dummy is good to use instead of regular gluing, put a dummy between each part and glue to that. It makes trigger enabled physics not fall apart.

    Slider, I have no idea. I guess it's for sliding doors? No idea how to use it.
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  3. #3

    Re: How do dummy's and sliders work?

    Sliders do exactly what it says they do..if u want a object to only "slide" one direction..then BAM use a slider..
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  4. #4

    Re: How do dummy's and sliders work?

    I was experimenting around one day with sliders and made a video on what I figured out. Feel free to check it out.

    http://www.youtube.com/watch?v=rJgNDc2HiUg


    My question: Is this how it should be used? Because the higher object bounces as its sliding which seems to me to be bad. I want it to slide like its on rails, but if I use something underneath it to keep it from bouncing, it impedes the slide all together. Is there an easy solution for this?
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  5. #5

    Re: How do dummy's and sliders work?

    As far as I can see there is no real solution to a completely rigid slider. It uses the same principles as the hinge, which I'm sure you've seen there is a fair amount of movement when a large amount of stress is placed on it.

    A possible solution where applicable:

    In your video the log slider at the top which has the object sliding downward, notice how far the glue joints are distanced from the log to the slider half. Then notice on the bottom, middle log slider how far the glue joints are distanced from the log to the slider half. From this I can extrapolate:

    The longer the distance from the slider joint an object is glued, the more force it will multiply in unwanted directions using this leverage.

    From this a player could come up with an efficient solution for their unique situation. However, for arguments sake try this for your bottom, middle log slider to make it more stable: Create a non-physical object above, but in line, with the upper log. Place this new object a short distance away from the old upper log and create a slider between them. Glue the two halfs of the slider and check the physics. Theoretically it should solve a lot of that horrible wobble the log created on its way down.
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  6. #6

    Re: How do dummy's and sliders work?

    ok ok, slider makes sense, but what doesnt make sense is why the force rotation wants to fight itself and then wobble your objects outta control...
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  7. #7

    Re: How do dummy's and sliders work?

    I've found that same problem with force rotation hinges. Although I haven't done MUCH testing with the fast rotation tool, I have found these 2 things that help:

    1. Always ALWAYS try to center any free rotation/force rotation hinge because the centrifugal force compounds as objects spin unless they're centered perfectly or something else to help control them (explained in #2).
    2. I've found that it helps if you use free rotation hinges in conjunction with force rotation hinges. Once again make sure the added free rotation hinge is centered to the force rotation hinge. The two tools don't have to be set on top of each other in fact it is sometimes better to have the free rotation hinge offset and possibly even add a second symetrical hinge.
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