calculate_angles.lua

function rad_to_deg(angle) return angle/math.pi*180 end

function calculate_angles(x, y, z, ex, ey, ez)

local pos =
{
['x']=x,
['y']=y,
['z']=z
}

local enemy_pos =
{
['x']=ex,
['y']=ey,
['z']=ez
}

local displacement =
{
['x']=pos['x']-enemy_pos['x'],
['y']=pos['y']-enemy_pos['y'],
['z']=pos['z']-enemy_pos['z']
}

local unsigned_aim_angles =
{
['horizontal']=rad_to_deg(math.abs(math.atan(displacement['x']/displacement['z']))),
['vertical']=rad_to_deg(math.abs(math.atan(displacement['y']/math.sqrt(math.pow(displacement['x'], 2)+math.pow(displacement['z'], 2)))))
}

local aim_angles =
{
['horizontal']=0,
['vertical']=0
}

if displacement['x'] < 0 then
    aim_angles['horizontal'] = -unsigned_aim_angles['horizontal']
    print('-x')
    if displacement['z'] > 0 then
        aim_angles['horizontal'] = -180 - aim_angles['horizontal']
    end
else
    aim_angles['horizontal'] = unsigned_aim_angles['horizontal']
    print('+x')
    if displacement['z'] > 0 then
        aim_angles['horizontal'] = 180 - aim_angles['horizontal']
    end
end

if displacement['y'] < 0 then
    aim_angles['vertical'] = unsigned_aim_angles['vertical']
else
    aim_angles['vertical'] = -unsigned_aim_angles['vertical']
end

return aim_angles

end