loader.cpp

Cal3D实现虚拟角色 Cal3D实现虚拟角色

  // set the duration in the core animation instance
  pCoreAnimation->setDuration(duration);

  // read the number of tracks
  int trackCount;
  if(!dataSrc.readInteger(trackCount) || (trackCount <= 0))
  {
    CalError::setLastError(CalError::INVALID_FILE_FORMAT, __FILE__, __LINE__);
    return 0;
  }

  // load all core bones
  int trackId;
  for(trackId = 0; trackId < trackCount; ++trackId)
  {
    // load the core track
    CalCoreTrack *pCoreTrack;
    pCoreTrack = loadCoreTrack(dataSrc, skel, duration);
    if(pCoreTrack == 0)
    {
      CalError::setLastError(CalError::INVALID_FILE_FORMAT, __FILE__, __LINE__);
      return 0;
    }

    // add the core track to the core animation instance
    pCoreAnimation->addCoreTrack(pCoreTrack);
  }

  return pCoreAnimation;
}

 /*****************************************************************************/
/** Loads a core material instance.
  *
  * This function loads a core material instance from a data source.
  *
  * @param dataSrc The data source to load the core material instance from.
  *
  * @return One of the following values:
  *         \li a pointer to the core material
  *         \li \b 0 if an error happened
  *****************************************************************************/

CalCoreMaterialPtr CalLoader::loadCoreMaterial(CalDataSource& dataSrc)
{

  // check if this is a valid file
  char magic[4];
  if(!dataSrc.readBytes(&magic[0], 4) || (memcmp(&magic[0], Cal::MATERIAL_FILE_MAGIC, 4) != 0))
  {
    CalError::setLastError(CalError::INVALID_FILE_FORMAT, __FILE__, __LINE__);
    return 0;
  }

  // check if the version is compatible with the library
  int version;
  if(!dataSrc.readInteger(version) || (version < Cal::EARLIEST_COMPATIBLE_FILE_VERSION) || (version > Cal::CURRENT_FILE_VERSION))
  {
    CalError::setLastError(CalError::INCOMPATIBLE_FILE_VERSION, __FILE__, __LINE__);
    return 0;
  }

  // allocate a new core material instance
  CalCoreMaterialPtr pCoreMaterial = new CalCoreMaterial();
  if(!pCoreMaterial)
  {
    CalError::setLastError(CalError::MEMORY_ALLOCATION_FAILED, __FILE__, __LINE__);
    return 0;
  }

  // get the ambient color of the core material
  CalCoreMaterial::Color ambientColor;
  dataSrc.readBytes(&ambientColor, sizeof(ambientColor));

  // get the diffuse color of the core material
  CalCoreMaterial::Color diffuseColor;
  dataSrc.readBytes(&diffuseColor, sizeof(diffuseColor));

  // get the specular color of the core material
  CalCoreMaterial::Color specularColor;
  dataSrc.readBytes(&specularColor, sizeof(specularColor));

  // get the shininess factor of the core material
  float shininess;
  dataSrc.readFloat(shininess);

  // check if an error happened
  if(!dataSrc.ok())
  {
    dataSrc.setError();
    return 0;
  }

  // set the colors and the shininess
  pCoreMaterial->setAmbientColor(ambientColor);
  pCoreMaterial->setDiffuseColor(diffuseColor);
  pCoreMaterial->setSpecularColor(specularColor);
  pCoreMaterial->setShininess(shininess);

  // read the number of maps
  int mapCount;
  if(!dataSrc.readInteger(mapCount) || (mapCount < 0))
  {
    CalError::setLastError(CalError::INVALID_FILE_FORMAT, __FILE__, __LINE__);
    return 0;
  }

  // reserve memory for all the material data
  if(!pCoreMaterial->reserve(mapCount))
  {
    CalError::setLastError(CalError::MEMORY_ALLOCATION_FAILED, __FILE__, __LINE__);
    return 0;
  }

  // load all maps
  int mapId;
  for(mapId = 0; mapId < mapCount; ++mapId)
  {
    CalCoreMaterial::Map map;

    // read the filename of the map
    std::string strName;
    dataSrc.readString(map.strFilename);

    // initialize the user data
    map.userData = 0;

    // check if an error happened
    if(!dataSrc.ok())
    {
      CalError::setLastError(CalError::INVALID_FILE_FORMAT, __FILE__, __LINE__);
      return 0;
    }

    // set map in the core material instance
    pCoreMaterial->setMap(mapId, map);
  }

  return pCoreMaterial;
}

 /*****************************************************************************/
/** Loads a core mesh instance.
  *
  * This function loads a core mesh instance from a data source.
  *
  * @param dataSrc The data source to load the core mesh instance from.
  *
  * @return One of the following values:
  *         \li a pointer to the core mesh
  *         \li \b 0 if an error happened
  *****************************************************************************/

CalCoreMeshPtr CalLoader::loadCoreMesh(CalDataSource& dataSrc)
{

  // check if this is a valid file
  char magic[4];
  if(!dataSrc.readBytes(&magic[0], 4) || (memcmp(&magic[0], Cal::MESH_FILE_MAGIC, 4) != 0))
  {
    CalError::setLastError(CalError::INVALID_FILE_FORMAT, __FILE__, __LINE__);
    return 0;
  }

  // check if the version is compatible with the library
  int version;
  if(!dataSrc.readInteger(version) || (version < Cal::EARLIEST_COMPATIBLE_FILE_VERSION) || (version > Cal::CURRENT_FILE_VERSION))
  {
    CalError::setLastError(CalError::INCOMPATIBLE_FILE_VERSION, __FILE__, __LINE__);
    return 0;
  }

  // get the number of submeshes
  int submeshCount;
  if(!dataSrc.readInteger(submeshCount))
  {
    CalError::setLastError(CalError::INVALID_FILE_FORMAT, __FILE__, __LINE__);
    return 0;
  }

  // allocate a new core mesh instance
  CalCoreMeshPtr pCoreMesh = new CalCoreMesh();
  if(!pCoreMesh)
  {
    CalError::setLastError(CalError::MEMORY_ALLOCATION_FAILED, __FILE__, __LINE__);
    return 0;
  }

  // load all core submeshes
  for(int submeshId = 0; submeshId < submeshCount; ++submeshId)
  {
    // load the core submesh
    CalCoreSubmesh *pCoreSubmesh = loadCoreSubmesh(dataSrc);
    if(pCoreSubmesh == 0)
    {
      return 0;
    }

    // add the core submesh to the core mesh instance
    pCoreMesh->addCoreSubmesh(pCoreSubmesh);
  }

  return pCoreMesh;
}

 /*****************************************************************************/
/** Loads a core skeleton instance.
  *
  * This function loads a core skeleton instance from a data source.
  *
  * @param dataSrc The data source to load the core skeleton instance from.
  *
  * @return One of the following values:
  *         \li a pointer to the core skeleton
  *         \li \b 0 if an error happened
  *****************************************************************************/

CalCoreSkeletonPtr CalLoader::loadCoreSkeleton(CalDataSource& dataSrc)
{

  // check if this is a valid file
  char magic[4];
  if(!dataSrc.readBytes(&magic[0], 4) || (memcmp(&magic[0], Cal::SKELETON_FILE_MAGIC, 4) != 0))
  {
    CalError::setLastError(CalError::INVALID_FILE_FORMAT, __FILE__, __LINE__);
    return 0;
  }

  // check if the version is compatible with the library
  int version;
  if(!dataSrc.readInteger(version) || (version < Cal::EARLIEST_COMPATIBLE_FILE_VERSION) || (version > Cal::CURRENT_FILE_VERSION))
  {
    CalError::setLastError(CalError::INCOMPATIBLE_FILE_VERSION, __FILE__, __LINE__);
    return 0;
  }

  // read the number of bones
  int boneCount;
  if(!dataSrc.readInteger(boneCount) || (boneCount <= 0))
  {
    CalError::setLastError(CalError::INVALID_FILE_FORMAT, __FILE__, __LINE__);
    return 0;
  }

  // allocate a new core skeleton instance
  CalCoreSkeletonPtr pCoreSkeleton = new CalCoreSkeleton();
  if(!pCoreSkeleton)
  {
    CalError::setLastError(CalError::MEMORY_ALLOCATION_FAILED, __FILE__, __LINE__);
    return 0;
  }

  // load all core bones
  for(int boneId = 0; boneId < boneCount; ++boneId)
  {
    // load the core bone
    CalCoreBone *pCoreBone = loadCoreBones(dataSrc);
    if(pCoreBone == 0)
    {
      return 0;
    }

    // set the core skeleton of the core bone instance
    pCoreBone->setCoreSkeleton(pCoreSkeleton.get());

    // add the core bone to the core skeleton instance
    pCoreSkeleton->addCoreBone(pCoreBone);

    // add a core skeleton mapping of the bone's name for quick reference later
    pCoreSkeleton->mapCoreBoneName(boneId, pCoreBone->getName());

  }

  // calculate state of the core skeleton
  pCoreSkeleton->calculateState();

  return pCoreSkeleton;
}

 /*****************************************************************************/
/** Loads a core bone instance.
  *
  * This function loads a core bone instance from a data source.
  *
  * @param dataSrc The data source to load the core bone instance from.
  *
  * @return One of the following values:
  *         \li a pointer to the core bone
  *         \li \b 0 if an error happened
  *****************************************************************************/

CalCoreBone *CalLoader::loadCoreBones(CalDataSource& dataSrc)
{
  if(!dataSrc.ok())
  {
    dataSrc.setError();
    return 0;
  }

  // read the name of the bone
  std::string strName;
  dataSrc.readString(strName);

  // get the translation of the bone
  float tx, ty, tz;
  dataSrc.readFloat(tx);
  dataSrc.readFloat(ty);
  dataSrc.readFloat(tz);

  // get the rotation of the bone
  float rx, ry, rz, rw;
  dataSrc.readFloat(rx);
  dataSrc.readFloat(ry);
  dataSrc.readFloat(rz);
  dataSrc.readFloat(rw);

  // get the bone space translation of the bone
  float txBoneSpace, tyBoneSpace, tzBoneSpace;
  dataSrc.readFloat(txBoneSpace);
  dataSrc.readFloat(tyBoneSpace);
  dataSrc.readFloat(tzBoneSpace);

  // get the bone space rotation of the bone
  float rxBoneSpace, ryBoneSpace, rzBoneSpace, rwBoneSpace;
  dataSrc.readFloat(rxBoneSpace);
  dataSrc.readFloat(ryBoneSpace);
  dataSrc.readFloat(rzBoneSpace);
  dataSrc.readFloat(rwBoneSpace);

  // get the parent bone id
  int parentId;
  dataSrc.readInteger(parentId);

  CalQuaternion rot(rx,ry,rz,rw);
  CalQuaternion rotbs(rxBoneSpace, ryBoneSpace, rzBoneSpace, rwBoneSpace);
  CalVector trans(tx,ty,tz);

  if (loadingMode & LOADER_ROTATE_X_AXIS)
  {
    if (parentId == -1) // only root bone necessary
    {
      // Root bone must have quaternion rotated
      CalQuaternion x_axis_90(0.7071067811f,0.0f,0.0f,0.7071067811f);
      rot *= x_axis_90;
      // Root bone must have translation rotated also
      trans *= x_axis_90;
    }
  }
  

  // check if an error happened
  if(!dataSrc.ok())
  {
    dataSrc.setError();
    return 0;
  }

  // allocate a new core bone instance
  CalCoreBone *pCoreBone;
  pCoreBone = new CalCoreBone(strName);
  if(pCoreBone == 0)
  {
    CalError::setLastError(CalError::MEMORY_ALLOCATION_FAILED, __FILE__, __LINE__);
    return 0;
  }

  // set the parent of the bone
  pCoreBone->setParentId(parentId);

  // set all attributes of the bone
  pCoreBone->setTranslation(trans);
  pCoreBone->setRotation(rot);
  pCoreBone->setTranslationBoneSpace(CalVector(txBoneSpace, tyBoneSpace, tzBoneSpace));
  pCoreBone->setRotationBoneSpace(rotbs);

  // read the number of children
  int childCount;
  if(!dataSrc.readInteger(childCount) || (childCount < 0))
  {
    delete pCoreBone;
    CalError::setLastError(CalError::INVALID_FILE_FORMAT, __FILE__, __LINE__);
    return 0;
  }

  // load all children ids
  for(; childCount > 0; childCount--)
  {
    int childId;
    if(!dataSrc.readInteger(childId) || (childId < 0))
    {
      delete pCoreBone;
      CalError::setLastError(CalError::INVALID_FILE_FORMAT, __FILE__, __LINE__);
      return 0;
    }

    pCoreBone->addChildId(childId);
  }

  return pCoreBone;
}

 /*****************************************************************************/
/** Loads a core keyframe instance.
  *
  * This function loads a core keyframe instance from a data source.
  *
  * @param dataSrc The data source to load the core keyframe instance from.
  *
  * @return One of the following values:
  *         \li a pointer to the core keyframe
  *         \li \b 0 if an error happened
  *****************************************************************************/

CalCoreKeyframe* CalLoader::loadCoreKeyframe(CalDataSource& dataSrc)
{
  if(!dataSrc.ok())
  {
    dataSrc.setError();
    return 0;
  }

  // get the time of the keyframe
  float time;
  dataSrc.readFloat(time);

  // get the translation of the bone
  float tx, ty, tz;
  dataSrc.readFloat(tx);
  dataSrc.readFloat(ty);
  dataSrc.readFloat(tz);

  // get the rotation of the bone
  float rx, ry, rz, rw;
  dataSrc.readFloat(rx);
  dataSrc.readFloat(ry);
  dataSrc.readFloat(rz);
  dataSrc.readFloat(rw);

  // check if an error happened
  if(!dataSrc.ok())
  {
    dataSrc.setError();
    return false;
  }