tangle_platform.lua

function getBlockType(p)
    local c = boundless.ChunkCoord(p)
    local blockType
    boundless.loadChunkAnd8Neighbours(c, function (chunks)
        local v = boundless.getBlockValues(boundless.BlockCoord(p))
        blockType = v.blockType
    end)
    return blockType
end

function setBlock(x, y, z, blockType, color)
    local p = boundless.wrap(boundless.UnwrappedBlockCoord(x, y, z))
    local c = boundless.ChunkCoord(p)
    boundless.loadChunkAnd8Neighbours(c, function (chunks)
        local v = boundless.getBlockValues(p)
        v.blockType = blockType
        v.blockMeta = 0
        v.blockColorIndex = color
        boundless.setBlockValues(p, v)
    end)
end

local lastBlock
local function onEnterFrame()
    for c in boundless.connections() do
        local e = boundless.getEntity(c:get_id())
        if e then
            blockPosUnderFeet = e:get_position():withYOffset(-0.5)
            blockType = getBlockType(blockPosUnderFeet)

            -- 0 is AIR block type
            -- 10858-10862 are the (un-chiseled) TANGLE block types
            -- so this checks if you are in the AIR and you were on a TANGLE block
            if blockType == 0 and lastBlock >= 10858 and lastBlock < 10862 then
                for x = -3,3 do
                    for z = -3,3 do
                        -- create a TANGLE (10858) block with a random color!
                        setBlock(math.floor(blockPosUnderFeet.x + x),
                                 math.floor(blockPosUnderFeet.y - 1),
                                 math.floor(blockPosUnderFeet.z + z),
                                 10858, --TANGLE
                                 math.random(255)) --random color
                    end
                end
            end

            lastBlock = blockType
        end
    end
end

function stop()
    boundless.removeEventListener(boundless.onEnterFrame, onEnterFrame)
end

boundless.addEventListener(boundless.onEnterFrame, onEnterFrame)