/**
   * This method retuns the bone tracks for animation for blender version 2.50 and higher.
   *
   * @param actionStructure the structure containing the tracks
   * @param blenderContext the blender context
   * @return a list of tracks for the specified animation
   * @throws BlenderFileException an exception is thrown when there are problems with the blend file
   */
  private BlenderAction getTracks250(Structure actionStructure, BlenderContext blenderContext)
      throws BlenderFileException {
    LOGGER.log(Level.FINE, "Getting tracks!");
    Structure groups = (Structure) actionStructure.getFieldValue("groups");
    List<Structure> actionGroups = groups.evaluateListBase(); // bActionGroup
    BlenderAction blenderAction =
        new BlenderAction(actionStructure.getName(), blenderContext.getBlenderKey().getFps());
    int lastFrame = 1;
    for (Structure actionGroup : actionGroups) {
      String name = actionGroup.getFieldValue("name").toString();
      List<Structure> channels =
          ((Structure) actionGroup.getFieldValue("channels")).evaluateListBase();
      BezierCurve[] bezierCurves = new BezierCurve[channels.size()];
      int channelCounter = 0;
      for (Structure c : channels) {
        int type = this.getCurveType(c, blenderContext);
        Pointer pBezTriple = (Pointer) c.getFieldValue("bezt");
        List<Structure> bezTriples = pBezTriple.fetchData();
        bezierCurves[channelCounter++] = new BezierCurve(type, bezTriples, 2);
      }

      Ipo ipo = new Ipo(bezierCurves, fixUpAxis, blenderContext.getBlenderVersion());
      lastFrame = Math.max(lastFrame, ipo.getLastFrame());
      blenderAction.featuresTracks.put(name, ipo);
    }
    blenderAction.stopFrame = lastFrame;
    return blenderAction;
  }
 /**
  * This method retuns the bone tracks for animation for blender version 2.49 (and probably several
  * lower versions too).
  *
  * @param actionStructure the structure containing the tracks
  * @param blenderContext the blender context
  * @return a list of tracks for the specified animation
  * @throws BlenderFileException an exception is thrown when there are problems with the blend file
  */
 private BlenderAction getTracks249(Structure actionStructure, BlenderContext blenderContext)
     throws BlenderFileException {
   LOGGER.log(Level.FINE, "Getting tracks!");
   Structure chanbase = (Structure) actionStructure.getFieldValue("chanbase");
   List<Structure> actionChannels = chanbase.evaluateListBase(); // bActionChannel
   BlenderAction blenderAction =
       new BlenderAction(actionStructure.getName(), blenderContext.getBlenderKey().getFps());
   int lastFrame = 1;
   for (Structure bActionChannel : actionChannels) {
     String animatedFeatureName = bActionChannel.getFieldValue("name").toString();
     Pointer p = (Pointer) bActionChannel.getFieldValue("ipo");
     if (!p.isNull()) {
       Structure ipoStructure = p.fetchData().get(0);
       Ipo ipo = this.fromIpoStructure(ipoStructure, blenderContext);
       if (ipo != null) { // this can happen when ipo with no curves appear in blender file
         lastFrame = Math.max(lastFrame, ipo.getLastFrame());
         blenderAction.featuresTracks.put(animatedFeatureName, ipo);
       }
     }
   }
   blenderAction.stopFrame = lastFrame;
   return blenderAction;
 }
  /**
   * This method creates an ipo object used for interpolation calculations.
   *
   * @param ipoStructure the structure with ipo definition
   * @param blenderContext the blender context
   * @return the ipo object
   * @throws BlenderFileException this exception is thrown when the blender file is somehow
   *     corrupted
   */
  public Ipo fromIpoStructure(Structure ipoStructure, BlenderContext blenderContext)
      throws BlenderFileException {
    Structure curvebase = (Structure) ipoStructure.getFieldValue("curve");

    // preparing bezier curves
    Ipo result = null;
    List<Structure> curves = curvebase.evaluateListBase(); // IpoCurve
    if (curves.size() > 0) {
      BezierCurve[] bezierCurves = new BezierCurve[curves.size()];
      int frame = 0;
      for (Structure curve : curves) {
        Pointer pBezTriple = (Pointer) curve.getFieldValue("bezt");
        List<Structure> bezTriples = pBezTriple.fetchData();
        int type = ((Number) curve.getFieldValue("adrcode")).intValue();
        bezierCurves[frame++] = new BezierCurve(type, bezTriples, 2);
      }
      curves.clear();
      result = new Ipo(bezierCurves, fixUpAxis, blenderContext.getBlenderVersion());
      Long ipoOma = ipoStructure.getOldMemoryAddress();
      blenderContext.addLoadedFeatures(ipoOma, LoadedDataType.STRUCTURE, ipoStructure);
      blenderContext.addLoadedFeatures(ipoOma, LoadedDataType.FEATURE, result);
    }
    return result;
  }
示例#4
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  /**
   * This method reads constraints for for the given structure. The constraints are loaded only once
   * for object/bone.
   *
   * @param objectStructure the structure we read constraint's for
   * @param blenderContext the blender context
   * @throws BlenderFileException
   */
  public void loadConstraints(Structure objectStructure, BlenderContext blenderContext)
      throws BlenderFileException {
    LOGGER.fine("Loading constraints.");
    // reading influence ipos for the constraints
    IpoHelper ipoHelper = blenderContext.getHelper(IpoHelper.class);
    Map<String, Map<String, Ipo>> constraintsIpos = new HashMap<String, Map<String, Ipo>>();
    Pointer pActions = (Pointer) objectStructure.getFieldValue("action");
    if (pActions.isNotNull()) {
      List<Structure> actions = pActions.fetchData(blenderContext.getInputStream());
      for (Structure action : actions) {
        Structure chanbase = (Structure) action.getFieldValue("chanbase");
        List<Structure> actionChannels = chanbase.evaluateListBase(blenderContext);
        for (Structure actionChannel : actionChannels) {
          Map<String, Ipo> ipos = new HashMap<String, Ipo>();
          Structure constChannels = (Structure) actionChannel.getFieldValue("constraintChannels");
          List<Structure> constraintChannels = constChannels.evaluateListBase(blenderContext);
          for (Structure constraintChannel : constraintChannels) {
            Pointer pIpo = (Pointer) constraintChannel.getFieldValue("ipo");
            if (pIpo.isNotNull()) {
              String constraintName = constraintChannel.getFieldValue("name").toString();
              Ipo ipo =
                  ipoHelper.fromIpoStructure(
                      pIpo.fetchData(blenderContext.getInputStream()).get(0), blenderContext);
              ipos.put(constraintName, ipo);
            }
          }
          String actionName = actionChannel.getFieldValue("name").toString();
          constraintsIpos.put(actionName, ipos);
        }
      }
    }

    // loading constraints connected with the object's bones
    Pointer pPose = (Pointer) objectStructure.getFieldValue("pose");
    if (pPose.isNotNull()) {
      List<Structure> poseChannels =
          ((Structure)
                  pPose.fetchData(blenderContext.getInputStream()).get(0).getFieldValue("chanbase"))
              .evaluateListBase(blenderContext);
      for (Structure poseChannel : poseChannels) {
        List<Constraint> constraintsList = new ArrayList<Constraint>();
        Long boneOMA =
            Long.valueOf(((Pointer) poseChannel.getFieldValue("bone")).getOldMemoryAddress());

        // the name is read directly from structure because bone might not yet be loaded
        String name =
            blenderContext
                .getFileBlock(boneOMA)
                .getStructure(blenderContext)
                .getFieldValue("name")
                .toString();
        List<Structure> constraints =
            ((Structure) poseChannel.getFieldValue("constraints")).evaluateListBase(blenderContext);
        for (Structure constraint : constraints) {
          String constraintName = constraint.getFieldValue("name").toString();
          Map<String, Ipo> ipoMap = constraintsIpos.get(name);
          Ipo ipo = ipoMap == null ? null : ipoMap.get(constraintName);
          if (ipo == null) {
            float enforce = ((Number) constraint.getFieldValue("enforce")).floatValue();
            ipo = ipoHelper.fromValue(enforce);
          }
          constraintsList.add(this.createConstraint(constraint, boneOMA, ipo, blenderContext));
        }
        blenderContext.addConstraints(boneOMA, constraintsList);
      }
    }

    // loading constraints connected with the object itself
    List<Structure> constraints =
        ((Structure) objectStructure.getFieldValue("constraints")).evaluateListBase(blenderContext);
    List<Constraint> constraintsList = new ArrayList<Constraint>(constraints.size());

    for (Structure constraint : constraints) {
      String constraintName = constraint.getFieldValue("name").toString();
      String objectName = objectStructure.getName();

      Map<String, Ipo> objectConstraintsIpos = constraintsIpos.get(objectName);
      Ipo ipo = objectConstraintsIpos != null ? objectConstraintsIpos.get(constraintName) : null;
      if (ipo == null) {
        float enforce = ((Number) constraint.getFieldValue("enforce")).floatValue();
        ipo = ipoHelper.fromValue(enforce);
      }
      constraintsList.add(
          this.createConstraint(
              constraint, objectStructure.getOldMemoryAddress(), ipo, blenderContext));
    }
    blenderContext.addConstraints(objectStructure.getOldMemoryAddress(), constraintsList);
  }
  /**
   * This constructor reads animation data from the object structore. The stored data is the
   * AnimData and additional data is armature's OMA.
   *
   * @param objectStructure the structure of the object
   * @param modifierStructure the structure of the modifier
   * @param blenderContext the blender context
   * @throws BlenderFileException this exception is thrown when the blender file is somehow
   *     corrupted
   */
  public ArmatureModifier(
      Structure objectStructure, Structure modifierStructure, BlenderContext blenderContext)
      throws BlenderFileException {
    if (this.validate(modifierStructure, blenderContext)) {
      Pointer pArmatureObject = (Pointer) modifierStructure.getFieldValue("object");
      if (pArmatureObject.isNotNull()) {
        ObjectHelper objectHelper = blenderContext.getHelper(ObjectHelper.class);
        ArmatureHelper armatureHelper = blenderContext.getHelper(ArmatureHelper.class);

        Structure armatureObject =
            pArmatureObject.fetchData(blenderContext.getInputStream()).get(0);
        this.armatureObjectOMA = armatureObject.getOldMemoryAddress();

        // read skeleton
        // changing bones matrices so that they fit the current object
        Structure armatureStructure =
            ((Pointer) armatureObject.getFieldValue("data"))
                .fetchData(blenderContext.getInputStream())
                .get(0);
        Structure bonebase = (Structure) armatureStructure.getFieldValue("bonebase");
        List<Structure> bonesStructures = bonebase.evaluateListBase(blenderContext);
        for (Structure boneStructure : bonesStructures) {
          BoneTransformationData rootBoneTransformationData =
              armatureHelper.readBoneAndItsChildren(boneStructure, null, blenderContext);
          armatureHelper.addBoneDataRoot(rootBoneTransformationData);
        }
        Matrix4f armatureObjectMatrix = objectHelper.getTransformationMatrix(armatureObject);
        Matrix4f inverseMeshObjectMatrix =
            objectHelper.getTransformationMatrix(objectStructure).invert();
        Matrix4f additionalRootBoneTransformation =
            inverseMeshObjectMatrix.multLocal(armatureObjectMatrix);
        Bone[] bones =
            armatureHelper.buildBonesStructure(Long.valueOf(0L), additionalRootBoneTransformation);

        // read mesh indexes
        Structure meshStructure =
            ((Pointer) objectStructure.getFieldValue("data"))
                .fetchData(blenderContext.getInputStream())
                .get(0);
        this.meshOMA = meshStructure.getOldMemoryAddress();
        this.readVerticesWeightsData(objectStructure, meshStructure, blenderContext);

        // read animations
        ArrayList<Animation> animations = new ArrayList<Animation>();
        List<FileBlockHeader> actionHeaders =
            blenderContext.getFileBlocks(Integer.valueOf(FileBlockHeader.BLOCK_AC00));
        if (actionHeaders != null) { // it may happen that the model has armature with no actions
          for (FileBlockHeader header : actionHeaders) {
            Structure actionStructure = header.getStructure(blenderContext);
            String actionName = actionStructure.getName();

            BoneTrack[] tracks = armatureHelper.getTracks(actionStructure, blenderContext);
            // determining the animation  time
            float maximumTrackLength = 0;
            for (BoneTrack track : tracks) {
              float length = track.getLength();
              if (length > maximumTrackLength) {
                maximumTrackLength = length;
              }
            }

            Animation boneAnimation = new Animation(actionName, maximumTrackLength);
            boneAnimation.setTracks(tracks);
            animations.add(boneAnimation);
          }
        }
        animData = new AnimData(new Skeleton(bones), animations);
      }
    }
  }