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0x00007FF67C421A60 Metaseq.exe: TFormMain::DocumentSaveAsWithFilter + 1712 bytes
0x00007FF67C421386 Metaseq.exe: TFormMain::DocumentSaveAs + 518 bytes
0x00007FF67C145123 Metaseq.exe: MTEventClosure<PyMQWidgetCallback<PyMQButton> >::invoke + 51 bytes
0x00007FF848324B5A MTKit.dll: MTObject::invokeCallback + 90 bytes
0x00007FF84831E172 MTKit.dll: MTMenuItemWidget::onLeftButtonUp + 1218 bytes
0x00007FF84831DEC7 MTKit.dll: MTMenuItemWidget::onLeftButtonUp + 535 bytes
0x00007FF8482B84C0 MTKit.dll: MTApplication::wndProc + 6560 bytes
0x00007FF8482B6B12 MTKit.dll: MTApplication::globalWndProc + 34 bytes
0x00007FF91C72EF5C USER32.dll: CallWindowProcW + 1548 bytes
0x00007FF91C72E684 USER32.dll: DispatchMessageW + 1188 bytes
0x00007FF8482B95FE MTKit.dll: MTApplication::enterEventLoop + 510 bytes
0x00007FF8482B93F1 MTKit.dll: MTApplication::execute + 17 bytes
0x00007FF67C483E62 Metaseq.exe: wWinMain + 2290 bytes
0x00007FF67C706E36 Metaseq.exe: __scrt_common_main_seh + 262 bytes
0x00007FF91D3B7374 KERNEL32.DLL: BaseThreadInitThunk + 20 bytes
0x00007FF91DF5CC91 ntdll.dll: RtlUserThreadStart + 33 bytes

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    switch(forwardAxis){
    case AXIS_X_PLUS:  m._11 = 0; m._12 = 1; m._21 = -1; m._22 = 0; break;
    case AXIS_X_MINUS: m._11 = 0; m._12 = -1; m._21 = 1; m._22 = 0; break;
    case AXIS_Y_PLUS: default: break;
    case AXIS_Y_MINUS: m._22 = -1; m._33 = -1; break;
    case AXIS_Z_PLUS:  m._22 = 0; m._23 = -1; m._32 = 1; m._33 = 0; break;
    case AXIS_Z_MINUS: m._22 = 0; m._23 = 1; m._32 = -1; m._33 = 0; break;
    }
    return m;
}

MQMatrix Bone::getBoneOrgMat()
{
    if(children.size() == 1){
        Bone *child = m_boneset->getBone(children.front());
        if(child != nullptr)
            return upVectorMat * BoneSet::CalcJointMatrix(this->org_pos, child->org_pos);
    }
    if(parent != 0){
        Bone *pnode = m_boneset->getBone(parent);
        if(pnode != nullptr)
            return upVectorMat * BoneSet::CalcJointMatrix(pnode->org_pos, this->org_pos);
    }
    return upVectorMat;
}

MQMatrix BoneSet::CalcJointMatrix(MQPoint root, MQPoint tip)
{
    MQPoint vec = root - tip;
    vec.normalize();
    if(fabs(vec.y) > 1 - 1e-5f){
        MQMatrix mtx;
        mtx.Identify();
        if(vec.y > 0){
            mtx._22 *= -1;
            mtx._33 *= -1;
        }
        return mtx;
    }
    MQPoint defvec(0,-1,0);
    float x = GetInnerProduct(defvec, vec);
    float rotationAngle = acosf(std::max(-1.0f, std::min(x, 1.0f)));
    MQPoint rotationAxis = GetCrossProduct(defvec, vec);
    rotationAxis.normalize();
    return GetRotationMatrixWithAxis(rotationAxis, rotationAngle);
}