Angle mathz

local bladeInfo = {
    [1] = { 0, 1 }, -- Top blade
    [2] = { 1, 0 }, -- Right blade
    [3] = { 0, -1 }, -- Bottom blade
    [3] = { -1, 0 } -- Left blade
}


FACING_FORWARD = 0
FACING_RIGHT = math.pi / 2
FACING_BACK = math.pi
FACING_LEFT = (math.pi / 2) * 3

function DoWindmillArms( x, y, z, ang, facing )
    -- This function assumes the previous blocks of the windmill blades have already been cleared
    -- x, y, z is the origin - the center of the windmill blades
    -- ang is the angle of the entire windmill
    -- facing is the direction the windmill is facing, on the y axis

    local bladeLength = 1

    for i=1, 4 do -- For each blade
        -- i is the blade ID

        for j=1, bladeLength do -- For each block along the blade
            -- Get the block coordinate along the blade, if the windmill was at angle 0
            local bX = bladeInfo[i][1] * j
            local bY = bladeInfo[i][2] * j

            -- Now, we'll rotate the coordinate by ang
            bX = bX * math.cos( ang ) - bY * math.sin( ang )
            bY = bX * math.sin( ang ) + bY * math.cos( ang )

            -- Finally, calculate the absolute block coordinates
            local blockX = x + (bX * math.cos( facing ))
            local blockY = y + bY
            local blockZ = z + (-bX * math.sin( facing))

            -- We have a block coordinate!
            -- TODO: Call function to set block ID to wood (or whatever) here


        end

    end
end