3D drawing stuff

            local verts = {}
            for i,vert in ipairs(buffer) do
                    if vert.x > 0 and vert.x < w and vert.y > 0 and vert.y < h then
                            --drawAtPoint(vert, verts)
                            verts[vert.nov] = vert
                    end
            end

           local sqrs = {}

            for i=1,#model.faces do
                local canDraw = true
                --list of vert ids and a color as the last index
                local sqtab = model.faces[i]
                --converted table of true vert coords compared to vert ids
                local ntab = {}
                local avgDist = 0
                local avgi = 0
                for i=1,(#sqtab - 1) do
                    --ID for vert
                    local id = sqtab[i]
                    if verts[id] ~= nil then
                        ntab[i] = {verts[id].x, verts[id].y}
                        avgDist = avgDist + verts[id].dist
                        avgi = avgi + 1
                    else
                        canDraw = false
                        --break
                    end
                end
                local square = triapi.fillSquare(ntab[1], ntab[2], ntab[3], ntab[4])

                local avgDist = avgDist/avgi

                square.dist = avgDist
                square.col = sqtab[5]

                if canDraw then sqrs[#sqrs + 1] = square end
                --triapi.drawShape(square, sqtab[5], colors.black, " ")
            end

            local sqrs_dists = {}
            while #sqrs > 0 do
                local maxDepth = 1
                for i=2,#sqrs do
                        if sqrs[i].dist > sqrs[maxDepth].dist then maxDepth = i end
                end
                table.insert(sqrs_dists, sqrs[maxDepth])
                table.remove(sqrs, maxDepth)
            end

            if #sqrs_dists > 3 then
                for i=(#sqrs_dists - 3),#sqrs_dists do
                    local sqr = sqrs_dists[i]
                    triapi.drawShape(sqr, sqr.col, colors.black, " ")
                end
            else
                for i=1,#sqrs_dists do
                    local sqr = sqrs_dists[i]
                    triapi.drawShape(sqr, sqr.col, colors.black, " ")
                end
            end