swimming in liquid is not affected by collision box size

[SnoutBug]

Luanti version

Luanti 5.10.0 Flatpak

Operating system and version

Flatpak

CPU model

No response

GPU model

No response

Active renderer

No response

Summary

When creating a nodebox as a liquid, the shape of the nodebox does not affect the swimmable area

Steps to reproduce

• Create a nodebox half the height of a node
• Make it a liquid
• notice the player swimming at the height of a full node

[sfan5]

For testing convenience please provide the code of the node you have defined.

[SnoutBug]

Sure, here is a small demo:

local source_liquid_def = core.registered_nodes["default:water_source"]

local node_name = "water_bug:water_low"

local half_def = {
    description = "water_bug:water_low",
    tiles = source_liquid_def.tiles,
    use_texture_alpha = source_liquid_def.use_texture_alpha,
    paramtype = source_liquid_def.paramtype,
    walkable = source_liquid_def.walkable,
    pointable = source_liquid_def.pointable,
    diggable = source_liquid_def.diggable,
    buildable_to = source_liquid_def.buildable_to,
    is_ground_content = source_liquid_def.is_ground_content,
    drawtype = "nodebox",
    drop = source_liquid_def.drop,
    drowning = source_liquid_def.drowning,
    liquidtype = "source",
    liquid_alternative_flowing = node_name,
    liquid_alternative_source = node_name,
    liquid_range = 0,
    liquid_viscosity = source_liquid_def.liquid_viscosity,
    liquid_renewable = false,
    waving = source_liquid_def.waving,
    color = source_liquid_def.color,
    node_box = {
        type = "fixed",
        fixed = {
            { -0.5, -0.5, -0.5, 0.5, -0.375, 0.5 },
        },
    },
    collision_box = {
        type = "fixed",
        fixed = { -0.5, -0.5, -0.5, 0.5, -0.375, 0.5 },
    },
    post_effect_color = source_liquid_def.post_effect_color,
    groups = source_liquid_def.groups,
    sounds = source_liquid_def.sounds,
}

core.register_node(node_name, half_def)

This creates a node that is 1/8 the height of a normal node based on water_source.

If you place both water_bug:water_low and default:water_source next to another, you will not notice a difference when swimming through them.