nc_extended_rotating/hud.lua

local nodecore
    = nodecore

local LABEL_ROTATION_HINT = "rotation hint"

local TEX_ROTATE_FACE = "nc_extended_rotating_hud_rotate_face.png"
local TEX_ROTATE_EDGE = "nc_extended_rotating_hud_rotate_edge.png"

local hud = {}

local function crosshair_hud_element(texture)
    return {
        label = LABEL_ROTATION_HINT,
        hud_elem_type = "image",
        text = texture,
        position  = { x = 0.5, y = 0.5 },
        offset    = { x = 0, y = 0 },
        alignment = { x = 0, y = 0 },
        scale     = { x = 1, y = 1 },
        quick = true
    }
end

local function update_player_hud(player, state)
    local mode = state and state.mode
    if mode == "face" then
        local texture = TEX_ROTATE_FACE
        if state.invert then texture = texture .. "^[transformFX" end
        texture = texture .. "^[opacity:" .. 192
        nodecore.hud_set(player, crosshair_hud_element(texture))
    else
        nodecore.hud_set(player, { label = LABEL_ROTATION_HINT, ttl = 0 })
    end
end
hud.update_player_hud = update_player_hud

return hud