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[1.15.2] Make Fluid flow player away


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Hey Guys,

i've created a Fluid using ForgeFlowingFluid which should behave like water but it don't flow things away :(


Fluid: https://pastebin.com/678Ve6Fc

FluidBlock: https://pastebin.com/DzsM2kaW


Some Ideas how i can fix that?


Edit #1:

Adding the following code to the fluidblock will make entities flow away if they don't move

    public void onEntityCollision(BlockState state, World worldIn, BlockPos pos, Entity entityIn) {
        super.onEntityCollision(state, worldIn, pos, entityIn);
        if (entityIn.getRidingEntity() instanceof BoatEntity) {
        } else if (entityIn.handleFluidAcceleration(BlutmondFluidTags.CRYSTALLIZER)) {
            entityIn.fallDistance = 0.0F;


Edited by Skyriis
insert first step to solution
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19 minutes ago, Skyriis said:

i've made a .json in data/%modid%/tags/fluids.

Should i move it to data/minecraft/tags/fluids?


i've tried moving it to the mincraft tags but it doen't fixed my problem :(

What does your water.json look like? The one I made for my thing when I was testing looked like this:


  "replace": false,
  "values": [

And it should be in data/minecraft/tags/fluids within your resources.

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Ah, then I don't believe it's going to be so simple, and you'll have to dig in and find (or hope someone knows) where the actual water flow physics take place, and then hope it's in a place you can change it, and not embedded in the middle of something crazy.


Sorry I'm not more help to you, I just knew that setting a fluid as water would make it float people and stuff, which is what it sounded like you wanted. Good luck! :)

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No problem,


i thought by changing the density and viscosity value of the FluidAttributes it whould work but it still behave like air and not like water.


Maybe someone else know how to change that. Meanwhile i'll take a look in the minecraft source codes.

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On 5/14/2020 at 3:19 PM, diesieben07 said:

There should probably be a pull request for mods to opt into it.

i didn't find any pull request related to water physics. As far as i could understand, the water physics are located in the Entity class of minecraft (for example: handleWaterMovement on line #1057). It whould be great if the forge team could add something to create custom fluid physics.

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