local reg_alias = ocutil.safe_register_alias
local reg_node  = ocutil.safe_register_node

-- GRASSBLOCK
-- A mod adding a grass block, raillike grass cover and 3 grass nodeboxes
-- Original release: 13/07/2013

detail_level = 16
local slopebox = {}
local detail = detail_level

for i = 0, detail-1 do
    slopebox[i+1]={-0.5,
(i/detail)-0.5, (i/detail)-0.5, 0.5, (i/detail)-0.5+(1/detail), 0.5}
end

reg_node ("grassblock:slope", {
    description = "Grass Slope",
    drawtype = "nodebox",
    tiles = {"default_grass.png"},
    paramtype = "light",
    paramtype2 = "facedir",
    walkable = true,
    selection_box = {
        type = "fixed",
        fixed = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
    },
    node_box = {
        type = "fixed",
        fixed = slopebox,
    },
    groups = {crumbly=3},
    })

    local slopeboxedge = {}

local detail = detail_level
for i = 0, detail-1 do
    slopeboxedge[i+1]={(i/detail)-0.5, -0.5, (i/detail)-0.5, 0.5, (i/detail)-0.5+(1/detail), 0.5}
end

reg_node ("grassblock:slope_edge", {
    description = "Outer Grass Slope",
    drawtype = "nodebox",
    tiles = {"default_grass.png"},
    paramtype = "light",
    paramtype2 = "facedir",
    walkable = true,
    selection_box = {
        type = "fixed",
        fixed = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
    },
    node_box = {
        type = "fixed",
        fixed = slopeboxedge,
    },
    groups = {crumbly=3},
    })

    reg_node ("grassblock:slope_inner_edge", {
    description = "Inner Grass Slope",
    drawtype = "nodebox",
    tiles = {"default_grass.png"},
    paramtype = "light",
    paramtype2 = "facedir",
    walkable = true,
    selection_box = {
        type = "fixed",
        fixed = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
    },
    node_box = {
        type = "fixed",
        fixed = {
            -- PART 1
            {-0.5, -0.5, -0.5, 0.5, -0.45, 0.5},
            {-0.45, -0.5, -0.5, 0.5, -0.4, 0.5},
            {-0.4, -0.5, -0.5, 0.5, -0.35, 0.5},
            {-0.35, -0.5, -0.5, 0.5, -0.3, 0.5},
            {-0.3, -0.5, -0.5, 0.5, -0.25, 0.5},
            {-0.25, -0.5, -0.5, 0.5, -0.2, 0.5},
            {-0.2, -0.5, -0.5, 0.5, -0.15, 0.5},
            {-0.15, -0.5, -0.5, 0.5, -0.1, 0.5},
            {-0.1, -0.5, -0.5, 0.5, -0.05, 0.5},
            {-0.05, -0.5, -0.5, 0.5, 0, 0.5},
            {0, -0.5, -0.5, 0.5, 0.05, 0.5},
            {0.05, -0.5, -0.5, 0.5, 0.1, 0.5},
            {0.1, -0.5, -0.5, 0.5, 0.15, 0.5},
            {0.15, -0.5, -0.5, 0.5, 0.2, 0.5},
            {0.2, -0.5, -0.5, 0.5, 0.25, 0.5},
            {0.25, -0.5, -0.5, 0.5, 0.3, 0.5},
            {0.3, -0.5, -0.5, 0.5, 0.35, 0.5},
            {0.35, -0.5, -0.5, 0.5, 0.4, 0.5},
            {0.4, -0.5, -0.5, 0.5, 0.45, 0.5},
            {0.45, -0.5, -0.5, 0.5, 0.5, 0.5},
            -- PART 2
            {-0.5, -0.5, -0.45, 0.5, -0.45, 0.5},
            {-0.5, -0.5, -0.4, 0.5, -0.4, 0.5},
            {-0.5, -0.5, -0.35, 0.5, -0.35, 0.5},
            {-0.5, -0.5, -0.3, 0.5, -0.3, 0.5},
            {-0.5, -0.5, -0.25, 0.5, -0.25, 0.5},
            {-0.5, -0.5, -0.2, 0.5, -0.2, 0.5},
            {-0.5, -0.5, -0.15, 0.5, -0.15, 0.5},
            {-0.5, -0.5, -0.1, 0.5, -0.1, 0.5},
            {-0.5, -0.5, -0.05, 0.5, -0.05, 0.5},
            {-0.5, -0.5, 0, 0.5, 0, 0.5},
            {-0.5, -0.5, 0.05, 0.5, 0.05, 0.5},
            {-0.5, -0.5, 0.1, 0.5, 0.1, 0.5},
            {-0.5, -0.5, 0.15, 0.5, 0.15, 0.5},
            {-0.5, -0.5, 0.2, 0.5, 0.2, 0.5},
            {-0.5, -0.5, .25, 0.5, 0.25, 0.5},
            {-0.5, -0.5, 0.3, 0.5, 0.3, 0.5},
            {-0.5, -0.5, 0.35, 0.5, 0.35, 0.5},
            {-0.5, -0.5, 0.4, 0.5, 0.4, 0.5},
            {-0.5, -0.5, 0.45, 0.5, 0.45, 0.5},
            {-0.5, -0.5, 0.5, 0.5, 0.5, 0.5},
            },
    },
    groups = {crumbly=3},
    })
    minetest.register_craft ({
        output = '"grassblock:slope_inner_edge" 3',
        recipe = {
            {'', '', 'grassblock:block'},
            {'grassblock:block', '', ''},
            {'grassblock:block', 'grassblock:block', ''},
        },
    })
    minetest.register_craft ({
        output = '"grassblock:slope_inner_edge" 3',
        recipe = {
            {'grassblock:block', '', ''},
            {'', '', 'grassblock:block'},
            {'', 'grassblock:block', 'grassblock:block'},
        },
    })

    minetest.register_craft ({
        output = '"grassblock:slope_edge" 3',
        recipe = {
            {'', '', ''},
            {'grassblock:block', '', ''},
            {'grassblock:block', 'grassblock:block', ''},
        },
    })

    minetest.register_craft ({
        output = '"grassblock:slope_edge" 3',
        recipe = {
            {'', '', ''},
            {'', '', 'grassblock:block'},
            {'', 'grassblock:block', 'grassblock:block'},
        },
    })

    minetest.register_craft ({
        output = '"grassblock:slope" 6',
        recipe = {
            {'grassblock:block', '', ''},
            {'grassblock:block', 'grassblock:block', ''},
            {'grassblock:block', 'grassblock:block', 'grassblock:block'},
        },
    })

    minetest.register_craft ({
        output = '"grassblock:slope" 6',
        recipe = {
            {'', '', 'grassblock:block'},
            {'', 'grassblock:block', 'grassblock:block'},
            {'grassblock:block', 'grassblock:block', 'grassblock:block'},
        },
    })

reg_node ("grassblock:block", {
    description = "Grass Block",
    tiles = {"default_grass.png"},
    is_ground_content = true,
    groups = {crumbly=3},
    sounds = default.node_sound_dirt_defaults({
        footstep = {name="default_grass_footstep", gain=0.4},
    }),
})

reg_node ("grassblock:cover", {
    description = "Grass Cover",
    drawtype = 'raillike',
    paramtype = 'light',
    walkable = false,
    tiles = {"default_grass.png"},
    is_ground_content = true,
    groups = {crumbly=3},
})

--Craft the block initially
minetest.register_craft ({
    output = '"grassblock:block" 4',
    recipe = {
        {'', 'default:leaves', ''},
        {'default:leaves', 'default:dirt', 'default:leaves'},
        {'', 'default:leaves', ''},
    }
})

--Craft hills
minetest.register_craft ({
    output = '"grassblock:cover" 9',
    recipe = {
        {'grassblock:block', '', ''},
        {'', 'grassblock:block', ''},
        {'', '', 'grassblock:block'},
    }
})

minetest.register_craft ({
    output = '"grassblock:cover" 9',
    recipe = {
        {'', '', 'grassblock:block'},
        {'', 'grassblock:block', ''},
        {'grassblock:block', '', ''},
    }
})

minetest.register_craft ({
    output = '"grassblock:block" 3',
    recipe = {
        {'grassblock:cover', 'grassblock:cover', 'grassblock:cover'},
        {'grassblock:cover', 'grassblock:cover', 'grassblock:cover'},
        {'grassblock:cover', 'grassblock:cover', 'grassblock:cover'},
    }
})

--Craft to dirt_with_grass
minetest.register_craft ({
    output = 'default:dirt_with_grass',
    recipe = {
        {'grassblock:block'},
    }
})

--Craft from dirt_with_grass
minetest.register_craft ({
    output = '"grassblock:block" 6',
    recipe = {
        {'default:dirt_with_grass', 'default:dirt_with_grass', 'default:dirt_with_grass'},
        {'default:dirt_with_grass', 'default:dirt_with_grass', 'default:dirt_with_grass'},
        }
})

reg_alias ("grassblock:hill", "grassblock:cover")