-- @description Vertical connect selected nodes
-- @author      Issa IK3D
-- @version     0.1
-- @shortcut    alt+v


root = octane.project.getSceneGraph()
selection = octane.project.getSelection()
geo = root:findNodes(1, true)


function connec2(un, deu)
    --print('pc un', un, un:getPinCount())
    --print('pc du', deu, un:getPinCount())

    for n=1, un:getPinCount() do
        if un:canConnectToIx(n, deu) then
            un:connectToIx(n, deu) 
            break
        end
    end
end

local t = {} -- [pose.y , node]

for e = 1, #selection do
    t[ math.floor(selection[e].position[2]) ] = selection[e]
end

local tkeys = {} -- sort y
-- populate the table that holds the keys
for k in pairs(t) do table.insert(tkeys, k) end

-- sort the keys
table.sort(tkeys)

local tidx = {} -- corresponding idx y in sorted key
for e = 1, #tkeys do
    tidx[ e ] = tkeys[e]
end

-- use the keys to retrieve the values in the sorted order
for h, k in ipairs(tkeys) do 
    if h+1 <= #tidx then
        connec2(t[tidx[h+1]], t[k])   
    end
end