The problem of transforming the format of SoildWorks

[Travis Cobbs]

As suggested by Owen, it's because of y axis orientation in Ldraw system. You can compensate for that either by modeling upside down, or by using a 180° rotation matrix in stl2dat (-m 0 0 0 1 0 0 0 -1 0 0 0 -1)

It probably doesn't matter here, since the part appears symmetric, but won't a 180 degree rotation result in a mirrored part? Isn't the correct matrix one that multiplies Y by -1? Am I missing something?