rasterapi

function getLineVoxels(x1,y1,z1,x2,y2,z2)
    local point = {x1,y1,z1}
    local dx = x2 - x1
    local dy = y2 - y1
    local dz = z2 - z1
    local x_inc = 1
    if dx < 0 then x_inc = -1 end
    local l = math.abs(dx)
    local y_inc = 1
    if dy < 0 then y_inc = -1 end
    local m = math.abs(dy)
    local z_inc = 1
    if dz < 0 then z_inc = -1 end
    local n = math.abs(dz)
    local dx2 = l * 2
    local dy2 = m * 2
    local dz2 = n * 2
    local err_1 = 0
    local err_2 = 0
    local output = {}

    if l>=m and l>=n then
        err_1 = dy2 -1
        err_2 = dz2 -1
        for i=0,i<l do
            table.insert(output,point)
            if err_1 > 0 then
                point[2] = point[2] + y_inc
                err_1 = err1 - dx2
            end
            if err_2 > 0 then
                point[3] = point[3] + z_inc
                err2 = err2 -dx2
            end
            err_1 = err1 + dy2
            err_2 = err_2 + dz2
            point[1] = point[1] + x_inc
        end
    elseif m>=l and m>=n then
        err_1 = dx2 - m
        err_2 = dz2 - m
        for i = 0,i<m do
            table.insert(output,point)
            if err_1 > 0 then
                point[1] = point[1] + x_inc
                err_1 = err_1 - dy2
            end
            if err_2 > 0 then
                point[3] = point[3] + z_inc;
                err_2 = err_2 - dy2
            end
            err_1 = err_1 + dx2
            err_2 = err_2 + dz2
            point[2] = point[2] + y_inc;
        end
    else
        err_1 = dy2 - n
        err_2 = dx2 - n
        for i = 0,i<n do
            table.insert(output,point)
            if err_1 > 0 then
                point[2] = point[2] + y_inc
                err_1 = err_1 - dz2
            end
            if err_2 > 0 then
                point[1] =  point[1] + x_inc
                err_2 = err_2 - dz2
            end
            err_1 = err_1 + dy2
            err_2 = err_2 + dx2
            point[3] = point[3] + z_inc
        end
    end
    table.insert(output,point)
    return output
end