float angleX, angleZ;

vector3 dirVector = v2 - v1;

vector3 projTarget = dirVector;

// project this onto the XZ plane
projTarget.y = 0;
projTarget.normalize();
angleZ = AngleBetweenVectors(projTarget, v2);

// build new forward and right vector
vector3 up(0, 1, 0);
vector3 right = -CrossProduct(projTarget, up);
up = CrossProduct(dirVector, right);
vector3 forward = CrossProduct(projTarget, right);

// project the enemy vector onto YZ plane
projTarget = v2;
projTarget.x = 0;
projTarget.normalize();
angleX = AngleBetweenVectors(forward, projTarget);

//angleZ = AngleBetweenVectors(projTarget);

float dotProduct = DotProduct(v1, v2);

if(v2.x > 0)
{
angleZ = 90 - angleZ;
}
else
{
angleZ = angleZ - 90;
}

if(v2.z < 0)
{
angleX = 90 - angleZ;
}
else
{
angleX = angleZ - 90;
}

Quaternion q;
q.SetRotateXYZ(DegToRad(angleX), 0, DegToRad (angleZ));