public void Clear()
        {
            _clipboard_ModMesh  = null;
            _clipboard_Keyframe = null;
            _clipboard_VertRig  = null;
            _clipboard_ModBone  = null;

            _snapShotList.Clear();
            //_curSnapShot = null;
            //_iCurSnapShot = -1;
            //_restoredSnapShot = false;

            _clipboard_AnimClipOfKeyframes = null;
            _clipboard_Keyframes           = null;
            _copied_keyframes_StartFrame   = -1;
            _copied_keyframes_EndFrame     = -1;

            //추가 19.8.9 : Rigging의 Pos-Copy 기능용 코드
            //이건 별도로 처리한다.
            if (_clipboard_MultipleVertRig == null)
            {
                _clipboard_MultipleVertRig = new apSnapShot_MultipleVertRig();
            }
            _clipboard_MultipleVertRig.Clear();
        }
        public void Copy_MultipleVertRig(apMeshGroup keyMeshGroup, List <apSelection.ModRenderVert> modRenderVerts)
        {
            if (_clipboard_MultipleVertRig == null)
            {
                _clipboard_MultipleVertRig = new apSnapShot_MultipleVertRig();
            }

            List <apModifiedVertexRig> vertRigs = new List <apModifiedVertexRig>();

            apSelection.ModRenderVert curModRenderVert = null;
            for (int i = 0; i < modRenderVerts.Count; i++)
            {
                curModRenderVert = modRenderVerts[i];
                if (curModRenderVert != null && curModRenderVert._modVertRig != null)
                {
                    vertRigs.Add(curModRenderVert._modVertRig);
                }
            }

            _clipboard_MultipleVertRig.Copy(keyMeshGroup, vertRigs);
        }