earthgen.register_ore({
    name = "air",
    wherein = "default:stone",
    seed_diff = 1234,
    maxhdistance = 70,
    maxvdistance = 70,
    maxheight = -3,
    seg_length_n = 15,
    seg_length_dev = 6,
    seg_incl_n = 0.2,
    seg_incl_dev = 0.6,
    turnangle = 57,
    forkturnangle = 57,
    num_per_block = 5,
    num_branches_n = 2,
    num_branches_dev = 0,
    mothersize_n = -1,
    mothersize_dev = 0,
    size_n = 100,
    size_dev = 30,
    radius = 2.3
})

earthgen.register_ore({
    name = "default:stone_with_iron",
    wherein = "default:stone",
    seed_diff = 0,
    maxhdistance = 20,
    maxvdistance = 20,
    maxheight = -16,
    seg_length_n = 15,
    seg_length_dev = 6,
    seg_incl_n = 0,
    seg_incl_dev = 0.6,
    turnangle = 57,
    forkturnangle = 57,
    num_per_block = 10
})

earthgen.register_ore({
    name = "default:stone_with_coal",
    wherein = "default:stone",
    seed_diff = 1,
    maxhdistance = 20,
    maxvdistance = 20,
--  maxvdistance = 10,
    size_n = 54,
    size_dev = 27,
    maxheight = 64,
    seg_length_n = 15,
    seg_length_dev = 6,
    seg_incl_n = 0,
    seg_incl_dev = 0.36,
    turnangle = 57,
    forkturnangle = 57,
    radius = 1,
    num_per_block = 6
})

earthgen.register_ore({
    name = "default:stone_with_mese",
    wherein = "default:stone",
    seed_diff = 2,
    maxvdistance = 50,
    size_n = 7,
    size_dev = 3,
    maxheight = -128,
    seg_length_n = 2,
    seg_length_dev = 1,
    seg_incl_n = 4,
    seg_incl_dev = 1,
    turnangle = 57,
    forkturnangle = 57,
    num_per_block = 0.8,
    num_branches_n = 2,
    num_branches_dev = 1,
    fork_chance = 0.1,
    mothersize_n = 0,
    mothersize_dev = 0
})

earthgen.register_ore({
    name = "default:mese",
    wherein = "default:stone",
    seed_diff = 3,
    maxvdistance = 50,
    size_n = 3,
    size_dev = 1,
    maxheight = -256, -- -1024 in a full-size world
    seg_length_n = 2,
    seg_length_dev = 1,
    seg_incl_n = 4,
    seg_incl_dev = 1,
    turnangle = 57,
    forkturnangle = 57,
    num_branches_n = 2,
    num_branches_dev = 1,
    fork_chance = 0.1,
    radius = 1
})

-- Same parameters exactly as the previous one so it spawns inside
earthgen.register_ore({
    name = "default:lava_source",
    wherein = "default:mese",
    seed_diff = 3,
    maxvdistance = 50,
    size_n = 3,
    size_dev = 1,
    maxheight = -256, -- -1024 in a full-size world
    seg_length_n = 2,
    seg_length_dev = 1,
    seg_incl_n = 4,
    seg_incl_dev = 1,
    turnangle = 57,
    forkturnangle = 57,
    num_branches_n = 2,
    num_branches_dev = 1,
    fork_chance = 0.1,
    mothersize_n = 0,
    mothersize_dev = 0
})

earthgen.register_ore({
    name = "default:stone_with_copper" ,
    wherein = "default:stone",
    seed_diff = 4,
    maxhdistance = 20,
    maxvdistance = 20,
--  maxvdistance = 10.5,
    maxheight = -16,

    radius = 2,
    seg_length_n = 15,
    seg_length_dev = 6,
    seg_incl_n = 0,
    seg_incl_dev = 0.6,

    turnangle = 57,
    forkturnangle = 57,

    num_per_block = 20, -- 2 in the original code
})

earthgen.register_ore({
    name = "default:stone_with_tin" ,
    wherein = "default:stone",
    seed_diff = 3742,
    maxhdistance = 20,
    maxvdistance = 20,
--  maxvdistance = 10.5,
    maxheight = -16,

    radius = 2,
    seg_length_n = 15,
    seg_length_dev = 6,
    seg_incl_n = 0,
    seg_incl_dev = 0.6,

    turnangle = 57,
    forkturnangle = 57,

    num_per_block =  5,
})

earthgen.register_ore({
    name = "default:stone_with_diamond",
    wherein = "default:stone",
    seed_diff = 5,
    maxvdistance = 50,
    size_n = 20,
    size_dev = 5,
    maxheight = -256,
    seg_length_n = 4,
    seg_length_dev = 2,
    seg_incl_n = 0.3,
    seg_incl_dev = 0.1,
    turnangle = 57,
    forkturnangle = 57,
    num_branches_n = 2,
    num_branches_dev = 1,
    fork_chance = 0.1,
    radius = 1
})

earthgen.register_ore({
    name = "default:stone_with_gold",
    wherein = "default:stone",
    seed_diff = 17,
    maxhdistance = 20,
    maxvdistance = 20,
    size_n = 3,
    size_dev = 2,
    maxheight = -10,
    seg_length_n = 4,
    seg_length_dev = 1,
    seg_incl_n = 0.6,
    seg_incl_dev = 0.4,
    turnangle = 57,
    forkturnangle = 57,
    num_branches_n = 2,
    num_branches_dev = 1,
    fork_chance = 0.1,
    num_per_block = 5,
    radius = 2
})

earthgen.register_ore({
    name = "default:clay",
    wherein = "default:dirt",
    seed_diff = 6,
    maxvdistance = 10.5,
    maxheight = 0,
    minheight = -50,
    size_n = 50,
    size_dev = 20,
    seg_length_n = 15,
    seg_length_dev = 6,
    seg_incl_n = 0,
    seg_incl_dev = 0.6,
    turnangle = 57,
    forkturnangle = 57,
    num_per_block = 1,
    radius = 1.5
})

local param_lava = {
    name = "default:lava_source",
    seed_diff = 7,
    maxhdistance = 20,
    maxvdistance = 70,
    maxheight = -100,
    seg_length_n = 2,
    seg_length_dev = 1,
    seg_incl_n = -5,
    seg_incl_dev = 2,
    turnangle = 57,
    forkturnangle = 57,
    num_per_block = 1,
    num_branches_n = 2,
    num_branches_dev = 1,
    mothersize_n = 5,
    mothersize_dev = 3,
    size_n = 8,
    size_dev = 2,
    radius = 2.3
}

earthgen.register_ore (param_lava)

-- ===================================================================

local blue_source = "bluelava:lava_source"

if ocutil.node_exists (blue_source) then
    local p = ocutil.clone_table (param_lava)
    p.name      = blue_source
    p.seed_diff = 5808
    earthgen.register_ore (p)
end

-- ===================================================================

local ore_def

local proto_ore_def = {
    name             = nil ,
    wherein          = "default:stone" ,

    seed_diff         =   42     , -- should normally be unique
    maxheight        =  -64     ,
    maxvdistance     =   50     ,

    radius           =    2     , --  1 to 2.5

    seg_incl_n       =    0     , --  often zero
                                  --  0.00 to 0.50 for typical minerals
                                  --  4.00 for some cases
                                  -- -5 for 1 case

    seg_incl_dev     =    0.6   , --  0.6 is a typical mineral value
                                  --  2.00 for lava

    seg_length_n     =    4     , --  2 to 8 for rare
                                  -- 15      for common

    seg_length_dev   =    1     , -- Often 1 or 6

    size_n           =    8     , -- 3 to 10 for many
                                  --   54    for stone_with_coal
                                  --  100    for air

    size_dev         =    4     , -- 0.25 to 0.50 of size_n

    forkturnangle    =   57     ,
    turnangle        =   57     ,

    num_per_block    =    8     , --  20    for common
    num_branches_n   =    2     ,
    num_branches_dev =    1     ,
    fork_chance      =    0.1   ,

    mothersize_n     =    0     ,
    mothersize_dev   =    0     ,
}

-- ===================================================================

local make_new_ore = function (seed_diff, nodename)

    if ocutil.node_missing (nodename) then
        earthgen.debug_log ("ore missing: " .. nodename)
        return nil
    else
        earthgen.debug_log ("ore present: " .. nodename)
    end

    local new_def     = ocutil.clone_table (proto_ore_def)
    new_def.name      = nodename
    new_def.seed_diff = seed_diff
    return new_def
end

-- ===================================================================

local ore_id = 5000

-- ===================================================================

    ore_def = make_new_ore (ore_id,
        "rhodochrosite:mineral_rhodochrosite" )
    if  ore_def ~= nil then
        ore_def.num_per_block = 15
        earthgen.register_ore (ore_def)
    end
    ore_id = ore_id + 1

-- ===================================================================

    ore_def = make_new_ore (ore_id,
        "nftools:stone_with_amber"            )
    if  ore_def ~= nil then
        ore_def.num_per_block =  5
        ore_def.seg_length_n  =  6
        earthgen.register_ore (ore_def)
    end
    ore_id = ore_id + 1

-- ===================================================================

    ore_def = make_new_ore (ore_id,
        "nftools:stone_with_bismuth"          )
    if  ore_def ~= nil then
        ore_def.num_per_block =  6
        ore_def.seg_length_n  =  8
        earthgen.register_ore (ore_def)
    end
    ore_id = ore_id + 1

-- ===================================================================

    ore_def = make_new_ore (ore_id,
        "nftools:stone_with_blackopal"        )
    if  ore_def ~= nil then
        ore_def.num_per_block =  6
        ore_def.seg_length_n  =  8
        earthgen.register_ore (ore_def)
    end
    ore_id = ore_id + 1

-- ===================================================================

    ore_def = make_new_ore (ore_id,
        "nftools:stone_with_turquoise"        )
    if  ore_def ~= nil then
        ore_def.num_per_block =  6
        ore_def.seg_length_n  =  8
        earthgen.register_ore (ore_def)
    end
    ore_id = ore_id + 1

-- ===================================================================

    ore_def = make_new_ore (ore_id,
        "aluminum:ore"                        )
    if  ore_def ~= nil then
        ore_def.num_per_block =  6
        ore_def.seg_length_n  =  8
        earthgen.register_ore (ore_def)
    end

-- ===================================================================

    ore_def = make_new_ore (ore_id,
        "emeralds:ore"                        )
    if  ore_def ~= nil then
        ore_def.num_per_block = 10
        ore_def.seg_length_n  =  8
        ore_def.size_n        = 10
        ore_def.size_dev      =  5
        earthgen.register_ore (ore_def)
    end
    ore_id = ore_id + 1

-- ===================================================================

    ore_def = make_new_ore (ore_id,
        "quartz:ore"                          )
    if  ore_def ~= nil then
        ore_def.num_per_block =  6
        ore_def.seg_length_n  =  8
        earthgen.register_ore (ore_def)
    end
    ore_id = ore_id + 1

-- ===================================================================

    ore_def = make_new_ore (ore_id,
        "titanium:ore"                        )
    if  ore_def ~= nil then
        ore_def.num_per_block = 10
        ore_def.seg_length_n  =  8
        earthgen.register_ore (ore_def)
    end
    ore_id = ore_id + 1

-- ===================================================================

local               earthgen_glowstones =
    ocutil.numset ("earthgen_glowstones") or 1500

if earthgen_glowstones <    0 then earthgen_glowstones =    0 end
if earthgen_glowstones > 2500 then earthgen_glowstones = 2500 end

if earthgen_glowstones >    0 then
    ore_def = make_new_ore (ore_id,
        "glowstone:glowstone"                 )

    if  ore_def ~= nil then
        ore_def.num_per_block    = earthgen_glowstones
        ore_def.seg_length_n     =    1
        ore_def.seg_length_dev   =    0
        ore_def.num_branches_n   =    0
        ore_def.num_branches_dev =    0
        ore_def.size_n           =    1
        ore_def.size_dev         =    0
        earthgen.register_ore (ore_def)
    end
end
ore_id = ore_id + 1

-- ===================================================================
-- End of file