4jcraft/Minecraft.World/Blocks/LiquidMaterial.h

#pragma once
#include "Material.h"

class LiquidMaterial : public Material {
public:
    LiquidMaterial(MaterialColor* color) : Material(color) {
        replaceable();
        destroyOnPush();
    }

    virtual bool isLiquid() { return true; }
    virtual bool blocksMotion() { return false; }
    virtual bool isSolid() { return false; }
};