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// TnzLib includes
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#include "toonz/txsheet.h"
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#include "toonz/txshcell.h"
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#include "toonz/hook.h"
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#include "toonz/dpiscale.h"
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#include "toonz/txshsimplelevel.h"
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#include "toonz/stage.h"
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#include "toonz/hook.h"
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#include "xshhandlemanager.h"
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//*******************************************************************************
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//    Local namespace
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//*******************************************************************************
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namespace {
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// Returns the sum of each pass hook between fid and precFid.
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TPointD forwardPass(const TFrameId &fid, const TFrameId &precFid,
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                    TXshSimpleLevel *sl, Hook *hook) {
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  TPointD delta;
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  std::vector<tframeid> levelFids;</tframeid>
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  sl->getFids(levelFids);
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  int f, fCount = levelFids.size();
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  for (f = 0; f != fCount; ++f) {
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    const TFrameId &levelFid = levelFids[f];
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    if (levelFid < precFid) continue;
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    if (levelFid >= fid) break;
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    if (hook->isKeyframe(levelFid))
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      delta += hook->getAPos(levelFid) - hook->getBPos(levelFid);
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  }
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  return delta;
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}
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//-----------------------------------------------------------------------------
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// Returns subtraction of each pass hook between fid and precFid.
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TPointD backwardPass(const TFrameId &fid, const TFrameId &precFid,
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                     TXshSimpleLevel *sl, Hook *hook) {
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  TPointD delta;
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  std::vector<tframeid> levelFids;</tframeid>
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  sl->getFids(levelFids);
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  int f, fCount = levelFids.size();
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  for (f = 0; f != fCount; ++f) {
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    const TFrameId &levelFid = levelFids[f];
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    if (levelFid < fid) continue;
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    if (levelFid >= precFid) break;
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    if (hook->isKeyframe(levelFid))
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      delta -= hook->getAPos(levelFid) - hook->getBPos(levelFid);
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  }
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  return delta;
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}
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//-----------------------------------------------------------------------------
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// Compute pass hook between fid and precFid
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TPointD computePassHook(const TFrameId &fid, const TFrameId &precFid,
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                        TXshSimpleLevel *sl, Hook *hook) {
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  if (fid < precFid && (precFid.getNumber() - fid.getNumber()) <= 2)
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    return backwardPass(fid, precFid, sl, hook);
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  return forwardPass(fid, precFid, sl, hook);
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}
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}  // namespace
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//*******************************************************************************
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//    XshHandleManager  implementation
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//*******************************************************************************
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TPointD XshHandleManager::getHandlePos(const TStageObjectId &id,
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                                       const std::string &handle,
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                                       int row) const {
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  static const double unit = 8.0;
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  assert(m_xsh->getScene());
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  if (handle == "")
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    return TPointD();
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  else if (handle[0] == 'H' && handle.length() > 1) {
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    // Hook port case
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    if (!id.isColumn()) return TPointD();
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    int hookIndex = 0;
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    {
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      int h, hLength = handle.length();
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      for (h = 1; h != hLength; ++h)
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        hookIndex = hookIndex * 10 + (handle[h] - '0');
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    }
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    TStageObject *obj = m_xsh->getStageObject(id);
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    if (const PlasticSkeletonDeformationP &def =
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            obj->getPlasticSkeletonDeformation()) {
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      int skelId = def->skeletonId(row);
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      PlasticSkeleton skel;
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      def->storeDeformedSkeleton(skelId, row, skel);
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      int v = def->vertexIndex(hookIndex, skelId);
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      return (v >= 0) ? TScale(1.0 / Stage::inch) * skel.vertex(v).P()
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                      : TPointD();
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    }
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    --hookIndex;
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    int col = id.getIndex();
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    TXshCell cell(m_xsh->getCell(row, col));
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    TXshLevel *xl = cell.m_level.getPointer();
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    if (!xl) return TPointD();
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    TXshSimpleLevel *sl = xl->getSimpleLevel();
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    if (!sl) return TPointD();
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    Hook *hook = sl->getHookSet()->getHook(hookIndex);
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    if (!hook) return TPointD();
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    TFrameId fid(cell.m_frameId);
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    TPointD pos = hook->getAPos(fid) * (1.0 / Stage::inch);
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    TPointD delta;
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    for (int r = row - 1; r >= 0; --r) {
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      cell = m_xsh->getCell(r, col);
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      if (cell.m_level.getPointer() != xl) break;
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      const TFrameId &precFid = cell.m_frameId;
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      delta += computePassHook(fid, precFid, sl, hook);
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      fid = precFid;
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    }
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    pos += delta * (1.0 / Stage::inch);
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    pos = getDpiAffine(sl, cell.m_frameId, true) * pos;
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    return pos;
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  } else if ('A' <= handle[0] && handle[0] <= 'Z')
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    return TPointD(unit * (handle[0] - 'B'), 0);
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  else if ('a' <= handle[0] && handle[0] <= 'z')
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    return TPointD(0.5 * unit * (handle[0] - 'b'), 0);
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  else
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    return TPointD();
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}